Join Proton and build a better internet where privacy is the default

At Proton, we believe that privacy is a fundamental human right and the cornerstone of democracy. Since our inception in 2014, founded by a team of scientists from CERN, we have dedicated ourselves to providing free and open-source technology to millions worldwide, ensuring access to privacy, security, and freedom online.

Our journey began with Proton Mail, the largest secure email service globally, and has since expanded to include Proton VPN, Proton Calendar, Proton Drive, and Proton Pass. These tools empower individuals and organizations to take control of their personal data, break away from Big Tech’s invasive practices, and defeat censorship. Our work impacts hundreds of millions of lives, from activists on the front lines defending freedom to leaders in governments protecting sensitive information. In some cases, Proton’s services have even been instrumental in saving lives by enabling secure and private communications in high-risk situations.

Proton today supports over 100 million user accounts with a growing team of over 500 people from over 50 different countries, from the world's top companies and universities. We value intelligence, learning potential, and ambition in our hiring process. Adaptability is key as we navigate uncharted territories and redefine how business is conducted online. We believe smaller teams of exceptional talent will always prevail over larger teams with lower talent density. Proton has become profitable and reached scale without relying upon VC funding, largely due to superior talent that allows us to do things faster, more creatively, and more efficiently.

We have a global mindset and big ambitions but remain a start-up at heart. We value empowerment and flexibility and keep our structure flat to keep moving fast and avoid unnecessary politics. Tired of blending into the crowd? Join us and do work you can truly be proud of. Check our social media pages to learn more about us: Twitter, Reddit, Instagram.

The role:

You will be responsible for designing, building, maintaining and evolving Proton applications on Windows. This includes not only building the application internals (managing and syncing local and remote state, performing cryptographic operations, etc) but also helping us to build a resilient, scalable application (graceful degradation; log and metrics streams free of personally identifiable information). You will be involved in the entire application lifecycle, including Gitlab configuration, deployments, monitoring and alerting, and operational incident response. While this position is not a "full-stack" position, you will be expected to collaborate with backend engineers to drive any necessary changes and/or new features needed for the Windows experience.

What you will do:

• Be part of a small team working to bring a "privacy by default" solution to our clients on Windows.
• Develop an application that delights a wide range of users, from layperson to technical, and gives confidence that their online privacy is in good hands - while getting the complexity of end-to-end encryption out of the way.
• Invest in testing and automation to improve the team's productivity and software delivery cadence.
• Think critically on how to divide problems into iterations of simpler, composable solutions. Re-evaluate the minimum scope as necessary to meet objectives on-time.
• Insist on high standards for application monitoring and alerting, in order to ensure a smooth customer experience at all times.

We we are looking for:

• Strong experience in .NET development
• Strong experience building and maintaining Desktop Windows applications
• Strong experience with concurrent multi-threaded programming
• Working knowledge of file systems
• Working knowledge of Git
• Bachelor's or master’s degree in a relevant field of study
• Experience with owning and maintaining large software components
• Experience with gradual rollouts and metrics/monitoring/alerting frameworks

Even if you don’t meet all the requirements listed above, but feel you could still be a great fit, please still apply.

What We Offer

• Office First: Collaboration is easier and more effective in person, which is why we have offices in Geneva, Zurich, Prague, Barcelona, Paris, London, Vilnius, Skopje, and Taipei. You can also enjoy working from home up to 30% of the time, while enjoying great company during our three core days in the office. 
• Technology: We provide all the devices and software you need to excel in your role, ensuring you have the best tools at your disposal to achieve your goals.
• Food: Lunch and snacks are provided by Proton every day at our offices.
• Transport: We will always support our employees with transport costs through subsidizing public transport, bike allowances, or parking spaces based on your office location.
• Stock Options: At Proton, we are all owners of the company and you get stock options when you join us.
• Flexible Working: You can define your own working hours as long as it works with team meetings.
• Learning and Development: We are committed to your professional growth. Proton offers various learning opportunities, including training programs, conferences and events, and continual learning.
• Employee Benefits: Comprehensive health insurance plans, competitive retirement savings options, generous vacation and leave policies, and wellness programs.
• Work that Matters: Proton is a community-first organization, started with the support of a crowdfunding campaign and built with community input. To this day, Proton’s only source of revenue is user subscriptions. Over 100 million people trust and support Proton, and we put our users and community first in everything we do. Read more about our impact here.

Our Commitment to Diversity and Inclusion

At Proton, we believe diversity drives innovation and strengthens our mission to provide privacy as a default for all. We are committed to fostering an inclusive environment where all individuals, regardless of race, ethnicity, gender, age, sexual orientation, physical ability, or socio-economic background, feel valued and empowered. We strive to create equal opportunities, promote open dialogue, and support continuous learning to ensure every voice is heard and respected.

If you need any extra support or reasonable adjustments during the hiring process, please let your talent partner know.

Candidate Privacy Notice

When you apply for a position, refer a candidate, or are considered for a role at Proton Technologies AG (Proton, we, us, or our), your information is stored in Greenhouse, in accordance with their Service Privacy Policy. This information is used to evaluate your suitability for the posted position. We also retain this information for consideration for future roles that you may apply for or that we believe may align with your background and skills.

If we no longer have a legitimate business need to process your information, we will either delete or anonymize it. Should you have any inquiries about how we use or manage your information, or if you wish to access, correct, or delete your data, please contact our privacy team at careers@proton.ch.

Proton does not accept unsolicited resumes from any sources other than directly from candidates. We will not pay a fee for any placement resulting from an unsolicited offer, even if the candidate is subsequently hired by Proton.

To learn more about our privacy policy, please visit our privacy policy page.

#LI-ONSITE

About SumUp

We believe in the everyday hero. Those who have the courage to follow their passion and who have the strength and determination to realise their dreams.

Small business owners are at the heart of all we do, so we're creating powerful, easy-to-use financial solutions to help them run their businesses. With a founder’s mentality and a team-first attitude, our diverse teams across Europe, South America and the United States work together to ensure that small business owners can be successful doing what they love.

🌍 Your Team

You’ll join SumUp’s Global Internal Audit team, part of our wider G&A / GRC function, reporting directly to the Global Head of Internal Audit.

This team plays a critical role in protecting SumUp’s integrity, supporting regulatory compliance, and strengthening trust with our Board, Audit Committee, and regulators. As our Internal Auditor - IT security specialist,  you’ll bring essential technology and data analytics expertise into a team that partners closely with senior leaders across the business.

You’ll be the go-to expert for technology-focused audits, helping shape how we assess IT risks, controls, and governance across a fast-scaling global fintech.

🔍 What You’ll Do

As an IT Internal Auditor, you’ll support the delivery of SumUp’s approved Internal Audit Plan, with a strong focus on technology, data, and systems risk.

In this role, you will:

• Plan and execute IT internal audits in line with the annual audit plan

• Assess IT general controls, security, governance, and risk management frameworks

• Prepare clear, insightful audit reports, presenting findings and recommendations to senior stakeholders

• Use data analytics to improve audit efficiency, sample testing, and risk identification

• Support ad-hoc audit projects and regulatory-related reviews

• Contribute to the continuous improvement of internal audit methodologies, frameworks, and templates

• Stay up to date with technology standards, regulatory developments, and industry best practices

• Build strong relationships across the business and promote a proactive internal controls culture

• Conduct targeted audits of AWS security standards and access controls across our cloud environment, ensuring credit card data stored in cloud services is adequately protected;
• Perform risk-based reviews of payment products and ensure security requirements are consistently embedded throughout the development lifecycle.
• Identifying anomalies or excessive privileges across different systems and payment platforms.

✅ You’ll Be Great for This Role If

You’re a hands-on IT auditor who enjoys combining technical depth with clear communication and stakeholder collaboration.

Must-have experience:

• Minimum 4 years’ experience in IT / Internal Audit within a regulated financial services environment

• Strong knowledge of audit standards, risk management, and internal controls

• Experience auditing IT controls and frameworks such as COBIT, ISO 27001, PCI DSS, ITIL, NIST, GDPR

• Practical exposure to areas like data security, cloud architecture, disaster recovery, security operations, or network infrastructure

• Advanced data analytics skills

• Professional-level English (written and spoken)

Nice to have:

• Professional certifications such as CIA, CISA, CPA

• Additional IT/security certifications (CISSP, CISM, CRISC, ISO 22301, or similar)

• Experience with audit-related data analytics tools

What sets you apart:

• High ethical standards and integrity

• Strong analytical and problem-solving mindset

• Confidence influencing change and challenging the status quo constructively

• Ability to work independently in a multinational environment

💚 Why You Should Join SumUp

🇬🇧 London, United Kingdom

🌎 Opportunity to work with a truly global, multicultural team from our central Covent Garden location, wrapped in historic charm and modern flair. This involves an office-first setup
🌈 Commitment to Diversity and Inclusion: be part of a workplace that values and promotes diversity, fostering an inclusive environment where everyone's perspectives are respected and embraced
🚀 Enrolment onto our VSOP program: you will own a stake in SumUp’s future success
🏖 Generous time off: enjoy 28 days of paid leave, plus bank holidays and special leaves
🏥 Health matters: Vitality health cover, including optical and dental
🚗 Life made easier: salary-sacrifice commuter benefits via Gogeta
💼 Financial security: retirement scheme (SumUp matches 7% when you contribute 5%)
🛡 Peace of mind: life insurance from MetLife for 2× your salary
🌴 Break4me: 1-month sabbatical after 3 years of service
🔗 Referral Bonus: earn additional rewards by referring talented individuals to join the SumUp team

About SumUp

We believe in the everyday hero. Those who have the courage to follow their passion and who have the strength and determination to realise their dreams.

Small business owners are at the heart of all we do, so we're creating powerful, easy-to-use financial solutions to help them run their businesses. With a founder’s mentality and a team-first attitude, our diverse teams across Europe, South America and the United States work together to ensure that small business owners can be successful doing what they love.

🌍 Your Team

You’ll join SumUp’s Global Internal Audit team, part of our wider G&A / GRC function, reporting directly to the Global Head of Internal Audit.

This team plays a critical role in protecting SumUp’s integrity, supporting regulatory compliance, and strengthening trust with our Board, Audit Committee, and regulators. As our IT Internal Auditor, you’ll bring essential technology and data analytics expertise into a team that partners closely with senior leaders across the business.

You’ll be the go-to expert for technology-focused audits, helping shape how we assess IT risks, controls, and governance across a fast-scaling global fintech.

🔍 What You’ll Do

As an IT Internal Auditor, you’ll support the delivery of SumUp’s approved Internal Audit Plan, with a strong focus on technology, data, and systems risk.

In this role, you will:

• Plan and execute IT internal audits in line with the annual audit plan

• Assess IT general controls, security, governance, and risk management frameworks

• Prepare clear, insightful audit reports, presenting findings and recommendations to senior stakeholders

• Use data analytics to improve audit efficiency, sample testing, and risk identification

• Support ad-hoc audit projects and regulatory-related reviews

• Contribute to the continuous improvement of internal audit methodologies, frameworks, and templates

• Stay up to date with technology standards, regulatory developments, and industry best practices

• Build strong relationships across the business and promote a proactive internal controls culture

• Conduct targeted audits of AWS security standards and access controls across our cloud environment, ensuring credit card data stored in cloud services is adequately protected.
• Perform risk-based reviews of payment products and ensure security requirements are consistently embedded throughout the development lifecycle.
• Identifying anomalies or excessive privileges across different systems and payment platforms.

✅ You’ll Be Great for This Role If

You’re a hands-on IT auditor who enjoys combining technical depth with clear communication and stakeholder collaboration.

Must-have experience:

• Minimum 4 years’ experience in IT / Internal Audit within a regulated financial services environment

• Strong knowledge of audit standards, risk management, and internal controls

• Experience auditing IT controls and frameworks such as COBIT, ISO 27001, PCI DSS, ITIL, NIST, GDPR

• Practical exposure to areas like data security, cloud architecture, disaster recovery, security operations, or network infrastructure

• Advanced data analytics skills

• Professional-level English (written and spoken)

Nice to have:

• Professional certifications such as CIA, CISA, CPA

• Additional IT/security certifications (CISSP, CISM, CRISC, ISO 22301, or similar)

• Experience with audit-related data analytics tools

What sets you apart:

• High ethical standards and integrity

• Strong analytical and problem-solving mindset

• Confidence influencing change and challenging the status quo constructively

• Ability to work independently in a multinational environment

💚 Why You Should Join SumUp

🌎 Opportunity to work with a truly global, multicultural team from our Dublin hub just steps from Harcourt Street Luas and charming Iveagh Gardens. This involves an office-first setup
🌈 Commitment to Diversity and Inclusion: be part of a workplace that values and promotes diversity, fostering an inclusive environment where everyone's perspectives are respected and embraced
🚀 Enrolment onto our VSOP programme: you will own a stake in SumUp’s future success
🏖️ Generous time off: 25 days paid leave, plus bank holidays and special leaves
🏥 Well-being support: health insurance for you and your family, and subsidised gym membership when you stay active
🚲 Easy commute perks: participate in the Bike-to-Work or TaxSaver Commuter Ticket scheme
💼 Financial growth: retirement savings match—SumUp tops your contributions up to 5%
🌴 Break4me: 1-month sabbatical after 3 years of service
🔗 Referral Bonus: earn additional rewards by referring talented individuals to join the SumUp team

Are you passionate about making an impact through technology and controls? At SumUp, we’re looking for an IT Internal Auditor to strengthen our Internal Audit team in Berlin. In this role, you’ll help ensure our IT environment is secure, compliant, and ready to support millions of businesses worldwide.

About SumUp

SumUp is a leading global fintech company committed to leveling the playing field for small businesses. Since 2012, we’ve been a trusted partner for over 4 million merchants in 36 markets worldwide. Our mission is to make business simple and affordable by providing tools that help entrepreneurs get paid, manage finances, and grow their customer relationships.

Team Description

You’ll be part of our Internal Audit team, reporting directly to the Global Head of Internal Audit. The team plays a crucial role in safeguarding SumUp’s operations, ensuring compliance with regulatory requirements, and driving continuous improvement across the business. This role focuses on strengthening our IT audit capabilities— an essential part of our audit plan and risk management strategy.

What You’ll Do

• Lead and execute IT-focused internal audits, ensuring that SumUp’s systems and controls meet regulatory and business requirements
• Uncover insights and improve audit efficiency by analysing data: run queries, extract information from systems, and apply advanced analytics
• Develop a focused IT audit plan, shaping how we evaluate technology risks across the company
• Translate findings into clear, actionable recommendations and present them with confidence to management and stakeholders
• Act as an independent voice for control and compliance, building trust while navigating resistance and influencing change
• Build strong relationships with stakeholders to foster a culture of proactive internal controls
• Stay ahead of the curve by keeping up with evolving IT standards, regulations, and best practices
• Conduct targeted audits of AWS security standards and access controls across our cloud environment, ensuring credit card data stored in cloud services is adequately protected;
• Perform risk-based reviews of payment products and ensure security requirements are consistently embedded throughout the development lifecycle.
• Identifying anomalies or excessive privileges across different systems and payment platforms.

You’ll Be Great for This Role If

• You have at least 4 years of internal audit experience within a regulated financial services environment.
• You bring proven IT auditing expertise and strong knowledge of audit standards and risk management.
• You are experienced with IT general controls, compliance, governance, and security frameworks (e.g. COBIT, ISO 27001, PCI DSS, ITIL, NIST, LGPD, GDPR).
• You have advanced data analytics skills and can leverage them in your audit work.
• You communicate clearly in English and are skilled in writing impactful reports.
• You are ethical, independent, and confident in influencing change across different levels of the organisation.
  
  

Nice to have: Professional certifications such as CIA, CISA, CPA, CISSP, CISM, or CRISC; knowledge of data analytics tools.

Why You Should Join SumUp

🌎 Opportunity to work with SumUppers globally on large-scale fintech products used by millions of businesses worldwide, from our Berlin office. This involves an office-first setup

🌈 Commitment to Diversity and Inclusion: be part of a workplace that values and promotes diversity, fostering an inclusive environment where everyone's perspectives are respected and embraced

🚀 Enrolment onto our Virtual Stock Option programme: you will own a stake in SumUp’s future success

📚 A dedicated annual L&D budget of €2000 for attending conferences and/or advancing your career through further education

💶 A corporate pension scheme where we match up to 20% of your contributions

🏖️ Generous time off: enjoy 28 days of paid leave plus public holidays and special leave days

🚵🏾‍♂️ Numerous other benefits such as Urban Sports Club subsidy, Kita placement assistance, subsidised office lunches

🌴 Break4me: 1-month sabbatical after 3 years of service

🔗 Referral Bonus: earn additional rewards by referring talented individuals to join the SumUp team

About SumUp

We believe in the everyday hero.

Small business owners are at the heart of all we do, so we create powerful, easy-to-use financial solutions to help them run their businesses. With a founder’s mentality and a 'team-first’ attitude, our diverse teams across Europe, South America, Australia and the United States work together to ensure that the small business owners we partner with can be successful doing what they love. 

SumUp is an Equal Employment Opportunity employer that proudly pursues and hires a diverse workforce. SumUp does not make hiring or employment decisions on the basis of race, colour, religion or religious belief, ethnic or national origin, nationality, sex, gender, gender identity, sexual orientation, disability, age or any other basis protected by applicable laws or prohibited by company policy. SumUp also strives for a healthy and safe workplace and strictly prohibits harassment of any kind.

SumUp will not accept unsolicited resumes from any source other than directly from a candidate. 

Summary

The Software Engineer is responsible for developing and maintaining software systems that support Shift4’s products. This role focuses on implementing reliable, scalable, and maintainable solutions while collaborating closely with product managers, designers, and fellow engineers. The engineer contributes to multiple phases of the development lifecycle, including design, development, testing, and deployment, while continuously improving technical skills and contributing to engineering best practices.

Responsibilities

• Collaborate with product and engineering leaders to design, build, and enhance software solutions that deliver measurable customer and business impact.
• Develop and maintain internal applications through hands-on coding, testing, debugging, and deployment of maintainable and reusable software.
• Contribute to system design discussions and implement technical solutions aligned with established architectural standards.
• Work within an agile development process, participating in two-week sprints with the goal of delivering release-ready software each cycle.
• Integrate applications with backend services, APIs, and cloud-based infrastructure.
• Operate independently when required, exercising sound judgment in decision-making and ensuring proper documentation of technical designs and workflows.
• Write clean, well-documented, and testable code following team coding standards and best practices.
• Participate in code reviews to maintain quality and consistency across the codebase.
• Identify opportunities to improve application performance, reliability, and maintainability.
• Troubleshoot issues, debug software defects, and support resolution of production incidents when needed.
• Stay up to date with modern development practices, frameworks, and technologies.
• Ensure compliance with software governance, security, and quality policies.
• Perform additional tasks within the department as assigned by management.

Qualifications

• 3-5 years of professional software development experience.
• Proficiency in JavaScript/TypeScript, React Native, and related libraries (e.g., Redux, React Navigation).
• Experience integrating with backend systems (REST APIs or equivalent) and working with cloud services such as AWS or similar platforms.
• Experience with version control systems, particularly Git.
• Familiarity with CI/CD pipelines, automated testing, and release management practices.
• Understanding of mobile performance considerations and debugging techniques.
• Strong problem-solving skills and the ability to develop practical technical solutions.
• Motivation to take on increasing responsibility and ownership within an agile development team.

Preferred Qualifications:

• Understanding of modern web application development using TypeScript with frameworks such as React or Ember.
• Experience working with AWS-hosted backends and databases.
• Bachelor’s degree in Computer Science, Engineering, Information Systems, or a related field.
• Experience working with native iOS (Swift/Objective-C) or Android (Kotlin/Java) codebases.
• Familiarity with mobile security, data encryption, and compliance practices.
• Experience with a distributed software system.
• Relevant professional certifications are advantageous but not required.

Benefits:

The salary range for this position is starting at 4000 Eur Gross. The exact salary will be determined based on the candidate’s experience.

Are you passionate about making an impact through technology and controls? At SumUp, we’re looking for an IT Internal Auditor to strengthen our Internal Audit team in Berlin. In this role, you’ll help ensure our IT environment is secure, compliant, and ready to support millions of businesses worldwide.

About SumUp

SumUp is a leading global fintech company committed to leveling the playing field for small businesses. Since 2012, we’ve been a trusted partner for over 4 million merchants in 36 markets worldwide. Our mission is to make business simple and affordable by providing tools that help entrepreneurs get paid, manage finances, and grow their customer relationships.

Team Description

You’ll be part of our Internal Audit team, reporting directly to the Global Head of Internal Audit. The team plays a crucial role in safeguarding SumUp’s operations, ensuring compliance with regulatory requirements, and driving continuous improvement across the business. This role focuses on strengthening our IT audit capabilities— an essential part of our audit plan and risk management strategy.

What You’ll Do

• Lead and execute IT-focused internal audits, ensuring that SumUp’s systems and controls meet regulatory and business requirements
  
  
• Uncover insights and improve audit efficiency by analysing data: run queries, extract information from systems, and apply advanced analytics
• Develop a focused IT audit plan, shaping how we evaluate technology risks across the company
  
  
• Translate findings into clear, actionable recommendations and present them with confidence to management and stakeholders
  
  
• Act as an independent voice for control and compliance, building trust while navigating resistance and influencing change
• Build strong relationships with stakeholders to foster a culture of proactive internal controls
  
  
• Stay ahead of the curve by keeping up with evolving IT standards, regulations, and best practices
  
  

You’ll Be Great for This Role If

• You have at least 4 years of internal audit experience within a regulated financial services environment.
  
  
• You bring proven IT auditing expertise and strong knowledge of audit standards and risk management.
  
  
• You are experienced with IT general controls, compliance, governance, and security frameworks (e.g. COBIT, ISO 27001, PCI DSS, ITIL, NIST, LGPD, GDPR).
  
  
• You have advanced data analytics skills and can leverage them in your audit work.
  
  
• You communicate clearly in English and are skilled in writing impactful reports.
  
  
• You are ethical, independent, and confident in influencing change across different levels of the organisation.
  
  

Nice to have: Professional certifications such as CIA, CISA, CPA, CISSP, CISM, or CRISC; knowledge of data analytics tools.

Why You Should Join SumUp

🌎 Opportunity to work with SumUppers globally on large-scale fintech products used by millions of businesses worldwide, from our Berlin office. This involves an office-first setup

🌈 Commitment to Diversity and Inclusion: be part of a workplace that values and promotes diversity, fostering an inclusive environment where everyone's perspectives are respected and embraced

🚀 Enrolment onto our Virtual Stock Option programme: you will own a stake in SumUp’s future success

📚 A dedicated annual L&D budget of €2000 for attending conferences and/or advancing your career through further education

💶 A corporate pension scheme where we match up to 20% of your contributions

🏖️ Generous time off: enjoy 28 days of paid leave plus public holidays and special leave days

🚵🏾‍♂️ Numerous other benefits such as Urban Sports Club subsidy, Kita placement assistance, subsidised office lunches

🌴 Break4me: 1-month sabbatical after 3 years of service

🔗 Referral Bonus: earn additional rewards by referring talented individuals to join the SumUp team

About SumUp

We believe in the everyday hero.

Small business owners are at the heart of all we do, so we create powerful, easy-to-use financial solutions to help them run their businesses. With a founder’s mentality and a 'team-first’ attitude, our diverse teams across Europe, South America, Australia and the United States work together to ensure that the small business owners we partner with can be successful doing what they love. 

SumUp is an Equal Employment Opportunity employer that proudly pursues and hires a diverse workforce. SumUp does not make hiring or employment decisions on the basis of race, colour, religion or religious belief, ethnic or national origin, nationality, sex, gender, gender identity, sexual orientation, disability, age or any other basis protected by applicable laws or prohibited by company policy. SumUp also strives for a healthy and safe workplace and strictly prohibits harassment of any kind.

SumUp will not accept unsolicited resumes from any source other than directly from a candidate. 

Are you passionate about making an impact through technology and controls? At SumUp, we’re looking for an IT Internal Auditor to strengthen our Internal Audit team in Sofia. In this role, you’ll help ensure our IT environment is secure, compliant, and ready to support millions of businesses worldwide.

About SumUp

SumUp is a leading global fintech company committed to leveling the playing field for small businesses. Since 2012, we’ve been a trusted partner for over 4 million merchants in 36 markets worldwide. Our mission is to make business simple and affordable by providing tools that help entrepreneurs get paid, manage finances, and grow their customer relationships.

Team Description

You’ll be part of our Internal Audit team, reporting directly to the Global Head of Internal Audit. The team plays a crucial role in safeguarding SumUp’s operations, ensuring compliance with regulatory requirements, and driving continuous improvement across the business. This role focuses on strengthening our IT audit capabilities— an essential part of our audit plan and risk management strategy.

What You’ll Do

• Lead and execute IT-focused internal audits, ensuring that SumUp’s systems and controls meet regulatory and business requirements
  
  
• Uncover insights and improve audit efficiency by analysing data: run queries, extract information from systems, and apply advanced analytics
• Develop a focused IT audit plan, shaping how we evaluate technology risks across the company
  
  
• Translate findings into clear, actionable recommendations and present them with confidence to management and stakeholders
  
  
• Act as an independent voice for control and compliance, building trust while navigating resistance and influencing change
• Build strong relationships with stakeholders to foster a culture of proactive internal controls
  
  
• Stay ahead of the curve by keeping up with evolving IT standards, regulations, and best practices
  
  

You’ll Be Great for This Role If

• You have at least 4 years of internal audit experience within a regulated financial services environment.
  
  
• You bring proven IT auditing expertise and strong knowledge of audit standards and risk management.
  
  
• You are experienced with IT general controls, compliance, governance, and security frameworks (e.g. COBIT, ISO 27001, PCI DSS, ITIL, NIST, LGPD, GDPR).
  
  
• You have advanced data analytics skills and can leverage them in your audit work.
  
  
• You communicate clearly in English and are skilled in writing impactful reports.
  
  
• You are ethical, independent, and confident in influencing change across different levels of the organisation.
  
  

Nice to have: Professional certifications such as CIA, CISA, CPA, CISSP, CISM, or CRISC; knowledge of data analytics tools.

Why You Should Join SumUp

🌍 Opportunity to work with SumUppers globally on large-scale fintech products used by millions of businesses worldwide, from our modern Sofia office (office-first setup).
🌈 Commitment to Diversity and Inclusion: be part of a workplace that values and promotes diversity, fostering an inclusive environment where everyone’s perspectives are respected and embraced.
🚀 Enrolment onto our Virtual Stock Option Programme: you will own a stake in SumUp’s future success.
🏖 Generous time off: 25 days of paid leave, plus one extra day per year of service (up to 35), along with public holidays and special leave options.
🏥 Peace of mind: comprehensive health and life insurance—including dental coverage.
💪 Stay active: on-site yoga and a co-sponsored Multisport card offering access to hundreds of sports facilities.
🍽 Meal support: benefit from a tax-free food voucher program plus flexibility via our Re:Benefits platform.
🚌 Easy commute: free shuttle buses connecting directly to Joliot-Curie metro station.
👶 Family-friendly: new baby bonus and subsidised daycare for kids aged 9 months to 12 years.
🌴 Break4me: 1-month sabbatical after 3 years of service.
🔗 Referral Bonus: earn rewards by referring talented people to join SumUp.

About SumUp

We believe in the everyday hero.

Small business owners are at the heart of all we do, so we create powerful, easy-to-use financial solutions to help them run their businesses. With a founder’s mentality and a 'team-first’ attitude, our diverse teams across Europe, South America, Australia and the United States work together to ensure that the small business owners we partner with can be successful doing what they love. 

SumUp is an Equal Employment Opportunity employer that proudly pursues and hires a diverse workforce. SumUp does not make hiring or employment decisions on the basis of race, colour, religion or religious belief, ethnic or national origin, nationality, sex, gender, gender identity, sexual orientation, disability, age or any other basis protected by applicable laws or prohibited by company policy. SumUp also strives for a healthy and safe workplace and strictly prohibits harassment of any kind.

SumUp will not accept unsolicited resumes from any source other than directly from a candidate. 

Are you passionate about making an impact through technology and controls? At SumUp, we’re looking for an IT Internal Auditor to strengthen our Internal Audit team in Vilnius. In this role, you’ll help ensure our IT environment is secure, compliant, and ready to support millions of businesses worldwide

About SumUp

SumUp is a leading global fintech company committed to leveling the playing field for small businesses. Since 2012, we’ve been a trusted partner for over 4 million merchants in 36 markets worldwide. Our mission is to make business simple and affordable by providing tools that help entrepreneurs get paid, manage finances, and grow their customer relationships.

Team Description

You’ll be part of our Internal Audit team, reporting directly to the Global Head of Internal Audit. The team plays a crucial role in safeguarding SumUp’s operations, ensuring compliance with regulatory requirements, and driving continuous improvement across the business. This role focuses on strengthening our IT audit capabilities— an essential part of our audit plan and risk management strategy.

What You’ll Do

• Lead and execute IT-focused internal audits, ensuring that SumUp’s systems and controls meet regulatory and business requirements
  
  
• Uncover insights and improve audit efficiency by analysing data: run queries, extract information from systems, and apply advanced analytics
• Develop a focused IT audit plan, shaping how we evaluate technology risks across the company
  
  
• Translate findings into clear, actionable recommendations and present them with confidence to management and stakeholders
  
  
• Act as an independent voice for control and compliance, building trust while navigating resistance and influencing change
• Build strong relationships with stakeholders to foster a culture of proactive internal controls
  
  
• Stay ahead of the curve by keeping up with evolving IT standards, regulations, and best practices
  
  

You’ll Be Great for This Role If

• You have at least 4 years of internal audit experience within a regulated financial services environment.
  
  
• You bring proven IT auditing expertise and strong knowledge of audit standards and risk management.
  
  
• You are experienced with IT general controls, compliance, governance, and security frameworks (e.g. COBIT, ISO 27001, PCI DSS, ITIL, NIST, LGPD, GDPR).
  
  
• You have advanced data analytics skills and can leverage them in your audit work.
  
  
• You communicate clearly in English and are skilled in writing impactful reports.
  
  
• You are ethical, independent, and confident in influencing change across different levels of the organisation.
  
  

Nice to have: Professional certifications such as CIA, CISA, CPA, CISSP, CISM, or CRISC; knowledge of data analytics tools.

Please note: The starting salary for this role is €3,700 gross per month.

Why You Should Join SumUp

🌎 Opportunity to work in a truly global, multicultural team from our cozy Vilnius office. This involves an office-first setup
🌈 Commitment to Diversity and Inclusion: be part of a workplace that values and promotes diversity, fostering an inclusive environment where everyone's perspectives are respected and embraced
🚀 Enrolment onto our VSOP program: you will own a stake in SumUp’s future success
🏖️ Generous time off: 25 days of paid leave, plus public and special holidays
🏥 Peace of mind: health insurance through Gjensidige and life & accidental coverage from Ergo
💪 Stay active: gym membership allowance to help you keep fit on your terms
🛍 Everyday savings: access discounts on hundreds of brands via our Corporate Benefits platform
🌴 Break4me: 1-month sabbatical after 3 years of service
🔗 Referral Bonus: earn additional rewards by referring talented individuals to join the SumUp team

About SumUp

We believe in the everyday hero.

Small business owners are at the heart of all we do, so we create powerful, easy-to-use financial solutions to help them run their businesses. With a founder’s mentality and a 'team-first’ attitude, our diverse teams across Europe, South America, Australia and the United States work together to ensure that the small business owners we partner with can be successful doing what they love. 

SumUp is an Equal Employment Opportunity employer that proudly pursues and hires a diverse workforce. SumUp does not make hiring or employment decisions on the basis of race, colour, religion or religious belief, ethnic or national origin, nationality, sex, gender, gender identity, sexual orientation, disability, age or any other basis protected by applicable laws or prohibited by company policy. SumUp also strives for a healthy and safe workplace and strictly prohibits harassment of any kind.

SumUp will not accept unsolicited resumes from any source other than directly from a candidate. 

Are you passionate about making an impact through technology and controls? At SumUp, we’re looking for an IT Internal Auditor to strengthen our Internal Audit team in Berlin. In this role, you’ll help ensure our IT environment is secure, compliant, and ready to support millions of businesses worldwide.

About SumUp

SumUp is a leading global fintech company committed to leveling the playing field for small businesses. Since 2012, we’ve been a trusted partner for over 4 million merchants in 36 markets worldwide. Our mission is to make business simple and affordable by providing tools that help entrepreneurs get paid, manage finances, and grow their customer relationships.

Team Description

You’ll be part of our Internal Audit team, reporting directly to the Global Head of Internal Audit. The team plays a crucial role in safeguarding SumUp’s operations, ensuring compliance with regulatory requirements, and driving continuous improvement across the business. This role focuses on strengthening our IT audit capabilities— an essential part of our audit plan and risk management strategy.

What You’ll Do

• Lead and execute IT-focused internal audits, ensuring that SumUp’s systems and controls meet regulatory and business requirements
  
  
• Uncover insights and improve audit efficiency by analysing data: run queries, extract information from systems, and apply advanced analytics
• Develop a focused IT audit plan, shaping how we evaluate technology risks across the company
  
  
• Translate findings into clear, actionable recommendations and present them with confidence to management and stakeholders
  
  
• Act as an independent voice for control and compliance, building trust while navigating resistance and influencing change
• Build strong relationships with stakeholders to foster a culture of proactive internal controls
  
  
• Stay ahead of the curve by keeping up with evolving IT standards, regulations, and best practices

You’ll Be Great for This Role If

• You have at least 4 years of internal audit experience within a regulated financial services environment.
  
  
• You bring proven IT auditing expertise and strong knowledge of audit standards and risk management.
  
  
• You are experienced with IT general controls, compliance, governance, and security frameworks (e.g. COBIT, ISO 27001, PCI DSS, ITIL, NIST, LGPD, GDPR).
  
  
• You have advanced data analytics skills and can leverage them in your audit work.
  
  
• You communicate clearly in English and are skilled in writing impactful reports.
  
  
• You are ethical, independent, and confident in influencing change across different levels of the organisation.
  
  

Nice to have: Professional certifications such as CIA, CISA, CPA, CISSP, CISM, or CRISC; knowledge of data analytics tools.

Why You Should Join SumUp

🌎 Opportunity to work with SumUppers globally on large-scale fintech products used by millions of businesses worldwide, from our Berlin office. This involves an office-first setup

🌈 Commitment to Diversity and Inclusion: be part of a workplace that values and promotes diversity, fostering an inclusive environment where everyone's perspectives are respected and embraced

🚀 Enrolment onto our Virtual Stock Option programme: you will own a stake in SumUp’s future success

📚 A dedicated annual L&D budget of €2000 for attending conferences and/or advancing your career through further education

💶 A corporate pension scheme where we match up to 20% of your contributions

🏖️ Generous time off: enjoy 28 days of paid leave plus public holidays and special leave days

🚵🏾‍♂️ Numerous other benefits such as Urban Sports Club subsidy, Kita placement assistance, subsidised office lunches

🌴 Break4me: 1-month sabbatical after 3 years of service

🔗 Referral Bonus: earn additional rewards by referring talented individuals to join the SumUp team

About SumUp

We believe in the everyday hero.

Small business owners are at the heart of all we do, so we create powerful, easy-to-use financial solutions to help them run their businesses. With a founder’s mentality and a 'team-first’ attitude, our diverse teams across Europe, South America, Australia and the United States work together to ensure that the small business owners we partner with can be successful doing what they love. 

SumUp is an Equal Employment Opportunity employer that proudly pursues and hires a diverse workforce. SumUp does not make hiring or employment decisions on the basis of race, colour, religion or religious belief, ethnic or national origin, nationality, sex, gender, gender identity, sexual orientation, disability, age or any other basis protected by applicable laws or prohibited by company policy. SumUp also strives for a healthy and safe workplace and strictly prohibits harassment of any kind.

SumUp will not accept unsolicited resumes from any source other than directly from a candidate. 

Join Proton and build a better internet where privacy is the default

At Proton, we believe that privacy is a fundamental human right and the cornerstone of democracy. Since our inception in 2014, founded by a team of scientists from CERN, we have dedicated ourselves to providing free and open-source technology to millions worldwide, ensuring access to privacy, security, and freedom online.

Our journey began with Proton Mail, the largest secure email service globally, and has since expanded to include Proton VPN, Proton Calendar, Proton Drive, and Proton Pass. These tools empower individuals and organizations to take control of their personal data, break away from Big Tech’s invasive practices, and defeat censorship. Our work impacts hundreds of millions of lives, from activists on the front lines defending freedom to leaders in governments protecting sensitive information. In some cases, Proton’s services have even been instrumental in saving lives by enabling secure and private communications in high-risk situations.

Proton is a profitable company that does not rely upon VC funding, supporting over 100 million user accounts with a growing team of over 500 people from over 50 different countries, from the world's top companies and universities. We value intelligence, learning potential, and ambition in our hiring process. Adaptability is key as we navigate uncharted territories and redefine how business is conducted online.

Hiring at Proton is highly selective, with less than 1% of candidates hired. We believe smaller teams of exceptional talent will always prevail over larger teams with lower talent density. You will have the opportunity to work with many of the world's top minds in their fields, ranging from former international math and science olympiad winners to chess champions.

We have a global mindset and big ambitions but remain a start-up at heart. We value empowerment and flexibility and keep our structure flat to keep moving fast and avoid unnecessary politics. Tired of blending into the crowd? Join us and do work you can truly be proud of. Check our open-source projects here!

The team:

Proton VPN enables millions of people to connect securely and privately, even in places where the internet is restricted or unreliable. Delivering that experience means our service must perform flawlessly under highly variable, real-world conditions.

We are looking for a Senior Performance Engineer to lead our efforts in making Proton VPN the fastest, most resilient, and most reliable VPN service in the world.

You will define and drive the measurement, analysis, and optimization of Proton VPN’s end-to-end performance, across clients, platforms, and global infrastructure. You’ll help ensure that every connection is fast, stable, and private, regardless of where the user is or what network they’re on.

What you will do: 

• Design and own Proton VPN’s performance framework, defining metrics and KPIs that reflect the real-world experience of users (time-to-connect, throughput, latency, stability, reconnection rates, etc.).
• Develop distributed testing systems that simulate real network conditions, including low bandwidth, packet loss, and high-latency scenarios.
• Continuously measure and analyze performance across platforms (desktop, mobile, backend) and regions to identify bottlenecks and regressions.
• Collaborate with backend, R&D, and client teams to optimize protocol handling, connection setup, routing, and encryption performance.
• Create dashboards, reports, and automated alerts to track global performance health.
• Contribute to the design of resilient connectivity strategies that adapt dynamically to variable network conditions.
• Serve as the performance champion within the engineering organization, mentoring others and driving a data-driven performance culture.

Job requirements: 

Technical Skills

• 5+ years of experience in performance engineering or systems QA, ideally in networking, VPNs, or distributed systems.
• Knowledge of network protocols (TCP/IP, UDP, TLS, WireGuard, debugging, manipulating, and performance profiling tools.
• Proven ability to analyze latency, throughput, and stability metrics across multiple layers (client, OS, transport, application).
• Proficiency in Python (or similar scripting language)
• Familiarity with network emulation and simulation tools (e.g., tc/netem, iperf, IPTables/nfTables…).
• Experience with monitoring and observability stacks (Grafana, Prometheus, Loki) and CI/CD pipelines.
• Cross-platform experience with Linux, macOS, Windows, Android, and iOS preferred.

Bonus points for: 

• Experience with Rust/C/C++/System development

Soft Skills

• Analytical and methodical, yet creative in solving complex performance problems.
• Comfortable working with uncertainty and non-deterministic conditions.
• Collaborative mindset, able to work across client, infrastructure, and data teams.
• Strong communication and documentation skills in English.

What We Offer

• Office First: Collaboration is easier and more effective in person, which is why we have offices in Geneva, Zurich, Prague, Barcelona, Paris, London, Vilnius, Skopje, and Taipei. You can also enjoy working from home up to 30% of the time, while enjoying great company during our three core days in the office. 
• Technology: We provide all the devices and software you need to excel in your role, ensuring you have the best tools at your disposal to achieve your goals.
• Food: Lunch and snacks are provided by Proton every day at our offices.
• Transport: We will always support our employees with transport costs through subsidizing public transport, bike allowances, or parking spaces based on your office location.
• Stock Options: At Proton, we are all owners of the company and you get stock options when you join us.
• Flexible Working: You can define your own working hours as long as it works with team meetings.
• Learning and Development: We are committed to your professional growth. Proton offers various learning opportunities, including training programs, conferences and events, and continual learning.
• Employee Benefits: Comprehensive health insurance plans, competitive retirement savings options, generous vacation and leave policies, and wellness programs.
• Work that Matters: Proton is a community-first organization, started with the support of a crowdfunding campaign and built with community input. To this day, Proton’s only source of revenue is user subscriptions. Over 100 million people trust and support Proton, and we put our users and community first in everything we do. Read more about our impact here.

Our Commitment to Diversity and Inclusion

At Proton, we believe diversity drives innovation and strengthens our mission to provide privacy as a default for all. We are committed to fostering an inclusive environment where all individuals, regardless of race, ethnicity, gender, age, sexual orientation, physical ability, or socio-economic background, feel valued and empowered. We strive to create equal opportunities, promote open dialogue, and support continuous learning to ensure every voice is heard and respected.

If you need any extra support or reasonable adjustments during the hiring process, please let your talent partner know.

Candidate Privacy Notice

When you apply for a position, refer a candidate, or are considered for a role at Proton Technologies AG (Proton, we, us, or our), your information is stored in Greenhouse, in accordance with their Service Privacy Policy. This information is used to evaluate your suitability for the posted position. We also retain this information for consideration for future roles that you may apply for or that we believe may align with your background and skills.

If we no longer have a legitimate business need to process your information, we will either delete or anonymize it. Should you have any inquiries about how we use or manage your information, or if you wish to access, correct, or delete your data, please contact our privacy team at careers@proton.ch.

Proton does not accept unsolicited resumes from any sources other than directly from candidates. We will not pay a fee for any placement resulting from an unsolicited offer, even if the candidate is subsequently hired by Proton.

To learn more about our privacy policy, please visit our privacy policy page.

#LI-Onsite

About Proton

Join Proton and build a better internet where privacy is the default

Proton was founded in 2014 by scientists from CERN on a simple truth: privacy is a fundamental human right. Since then, we’ve built the world’s largest encrypted email service (Proton Mail) and expanded into Proton VPN, Proton Drive, Proton Pass, and Proton Calendar—tools used by millions globally to protect their freedom, fight censorship, and keep their data safe. In some situations, Proton has literally helped save lives!

We are profitable, independent (no VC control), and selectively hire from the top ~1% of applicants. Our 500+ team members across 50+ countries come from leading organizations and elite academic backgrounds. We move fast, keep hierarchy light, and prioritize impact over optics. If you want to do meaningful work with exceptionally high-caliber people, this is it. Join us and do work you can truly be proud of. Check our open-source projects here!

The team:

Join a world-class Linux engineering team at the forefront of privacy-focused open-source development, where your contributions directly impact millions of users worldwide. Our engineers are passionate problem-solvers who thrive in a fast-paced, collaborative environment, tackling complex technical challenges with creativity and rigor. We value autonomy, technical excellence, and a shared commitment to building software that genuinely makes the world a safer place. If you are driven by purpose and love working alongside exceptionally talented people, you will feel right at home here.

What you will do:

• Design, develop, and maintain robust automated test frameworks and pipelines for Linux-based open-source software

• Write and execute functional, integration, regression, and end-to-end test suites to ensure product reliability and security

• Collaborate closely with developers to define testability requirements and integrate automated tests into CI/CD workflows

• Identify, document, and track software defects, working with engineering teams to drive timely resolution

• Perform exploratory and risk-based testing with a strong focus on privacy, data integrity, and security compliance

• Develop and maintain test infrastructure, including virtual machines, containers, and Linux environment configurations

• Analyze test results, generate reports, and provide actionable insights to improve software quality and release confidence

• Contribute to the continuous improvement of QA processes, tools, and best practices across the engineering organization

• Participate in code reviews for test code, ensuring maintainability, scalability, and adherence to engineering standards

• Stay current with the latest Linux ecosystem developments, testing methodologies, and open-source tooling

What we are looking for:

• 3–5 years of hands-on experience in software test automation, with a strong focus on Linux-based environments

• Solid proficiency in at least one scripting or programming language commonly used for test automation, such as Python, Bash, or Go

• Proven experience designing and maintaining automated test frameworks (e.g., pytest, Robot Framework, or similar)

• Good understanding of CI/CD pipelines and experience integrating automated tests with tools such as GitLab CI, Jenkins, or GitHub Actions

• Familiarity with containerization and virtualization technologies, including Docker, QEMU, or similar tools for test environment management

• Solid knowledge of Linux internals, system administration, and command-line tooling

• Experience with version control systems, particularly Git, and comfort working in an open-source collaborative development model

• Understanding of software security principles and privacy-by-design concepts is a strong plus

• Ability to read and understand application source code to improve test coverage and identify edge cases

• Strong analytical and problem-solving skills, with a structured and detail-oriented approach to quality assurance

• Good communication skills and ability to work effectively in a remote, internationally distributed team

• A genuine passion for open-source software, privacy, and building technology that has a positive impact on society

What We Offer:

• Work that Matters: millions of people trust Proton with their privacy. We answer only to our users — not advertisers, not investors with conflicting agendas, not governments. The work you do here is real, and the impact is measurable. (read more about our impact here)

• Stock Options: at Proton, we all have the opportunity to be owners of the company. From day one, you have a real stake in what we're building. When Proton wins, you win.

• Technology: you'll get the right hardware and the right software you need to do your best work.

• Learning & Development: we invest in your growth because sharp people make us better. Proton is one of the fastest ways to accelerate your career because you'll be thrown into real challenges, with real ownership, from day one.

• Employee Benefits: your wellbeing isn't an afterthought. We offer strong health coverage, solid retirement options, generous leave, and wellness support so you can bring your best self to work every day

• In-Person Collaboration: Amazing things happen when passionate, smart, and purposeful people get together in the same room. With offices across Geneva, Zürich, Barcelona, London and more, you'll spend most of your time collaborating face-to-face with people who genuinely care about what they're building

• Food: Lunch and snacks are on us every day in our offices so you can focus on the work and not on what's for lunch.

• Transport: getting to the office shouldn't cost you. We cover public transport, bike allowances, or parking, whichever works for you.

• Flexible Working: you own your schedule. Set hours that work for you and your team — because outcomes matter more than when the clock says you started.

Our Commitment to Diversity and Inclusion

At Proton, we believe diversity drives innovation and strengthens our mission to provide privacy as a default for all. We are committed to fostering an inclusive environment where all individuals, regardless of race, ethnicity, gender, age, sexual orientation, physical ability, or socio-economic background, feel valued and empowered. We strive to create equal opportunities, promote open dialogue, and support continuous learning to ensure every voice is heard and respected.

If you need any extra support or reasonable adjustments during the hiring process, please let your talent partner know.

Candidate Privacy Notice

When you apply for a position, refer a candidate, or are considered for a role at Proton Technologies AG (Proton, we, us, or our), your information is stored in Greenhouse, in accordance with their Service Privacy Policy. This information is used to evaluate your suitability for the posted position. We also retain this information for consideration for future roles that you may apply for or that we believe may align with your background and skills.

If we no longer have a legitimate business need to process your information, we will either delete or anonymize it. Should you have any inquiries about how we use or manage your information, or if you wish to access, correct, or delete your data, please contact our privacy team at careers@proton.ch.

Proton does not accept unsolicited resumes from any sources other than directly from candidates. We will not pay a fee for any placement resulting from an unsolicited offer, even if the candidate is subsequently hired by Proton.

To learn more about our privacy policy, please visit our privacy policy page.

Salary range (Vilnius) - 46.100 - 60.000 EUR gross annual 

#LI-Onsite

About the Job:

You will be the technical lead within our release orchestration and deployment product development teams. You will build upon our software stack that is being run by numerous Fortune 5000 companies in the world to streamline their DevOps processes at scale. We are looking for owners, people that can pick up a something from a range of topics and become experts, producing a quality solution that will last, and leaders, that can encourage team members with their work and personality to produce the best solutions. The position is full-stack, but with backend affinity – passionate about architecture, performance and scalability.

What you will do:

• Serve as the Technical Lead for our Release Orchestration product development teams.
• Own your space and pick up a range of topics to become an expert and produce a quality solution that will last.
• Lead by example with your work expertise and inspire your team with your personality to produce the best solutions.

What you will bring:

• Located in Lithuania. Candidates outside Vilnius will be considered for a hybrid work schedule, coming to office occasionally as needed.
• Bachelors degree and professional experience crafting enterprise softwareValidated experience in application/product development using a broad range of programming technologies including:
• At least 5 years of experience developing full-stack applications
• Excellent knowledge of object-oriented programming in Java and Scala languages
• Experience with Spring, Akka, ORMs, and SQL databases
• Excellent testing skills with JUnit and ScalaTest
• Solid understanding of DevOps tools and practices, including CI/CD pipelines (GitLab, GitHub Actions), containerization (Docker, Kubernetes), and cloud platforms (AWS, Azure, GCP).
• Practical experience with Go or Kubernetes, cloud platform APIs is a great plus.
• Willingness to share knowledge and mentor team members to support their growth and development
• Growth mindset, continually seeking feedback on ways to improve yourself and the team
• Familiarity with React, TypeScript, JavaScript, and associated tooling
• Understanding of software design and architecture principles to develop maintainable enterprise applications
• Phenomenal written and spoken English skills

For this position we offer a gross salary of 5,200 - 6,250 EUR/month depending on the level of experience.

Why is Digital.ai a great place to be?

Digital.ai offers great benefits including:

• Opportunity to work in an international company
• Outstanding and exciting challenges
• Cash long term incentive plan
• Private health insurance
• Employee referral program
• Free access to O'Reilly 
• Informal work environment and flexible working hours
• Additional days off
• Team building and other unifying events
• Team meals and snacks in the office
• Food delivery voucher
• Office parking

At Digital.ai, we believe in fostering a culture of pay transparency. We are committed to providing our employees with fair and competitive compensation. The current salary for this specific job is estimated to be €62,500 - €70,000 pus bonus. Please note that final compensation will be determined based on factors such as qualifications, experience, and internal equity. We value transparency and aim to create an inclusive and equitable workplace for all our employees. Certain positions at Digital.ai might also be eligible for additional compensation in the form of bonuses, or other employee benefits which are separate from the base salary and to be defined at offer stage.

All are welcome to apply.  We maintain compliance with federal, state, and local laws that prohibit employment discrimination on the basis of age, race, color, gender, identity, gender expression, sex, pregnancy, national origin, ancestry, religion, physical or mental ability, medical condition, sexual orientation, marital status, citizenship status, protected military or veteran status, and all other protected classifications. We welcome everyone and believe that diversity is the foundation of innovation.

For individuals with disabilities who would like to request accommodation, please advise us within your job application or cover letter.

FRAUD PREVENTION ALERT: please note that Digital.ai does not use third party recruiters. In our efforts to protect you against impersonation please check the email address or if you are contacted by an unfamiliar/third party requesting please reach out directly to Digital.ai.

Join Proton and build a better internet where privacy is the default

At Proton, we believe that privacy is a fundamental human right and the cornerstone of democracy. Since our inception in 2014, founded by a team of scientists from CERN, we have dedicated ourselves to providing free and open-source technology to millions worldwide, ensuring access to privacy, security, and freedom online.

Our journey began with Proton Mail, the largest secure email service globally, and has since expanded to include Proton VPN, Proton Calendar, Proton Drive, and Proton Pass. These tools empower individuals and organizations to take control of their personal data, break away from Big Tech’s invasive practices, and defeat censorship. Our work impacts hundreds of millions of lives, from activists on the front lines defending freedom to leaders in governments protecting sensitive information. In some cases, Proton’s services have even been instrumental in saving lives by enabling secure and private communications in high-risk situations.

Proton is a profitable company that does not rely upon VC funding, supporting over 100 million user accounts with a growing team of over 500 people from over 50 different countries, from the world's top companies and universities. We value intelligence, learning potential, and ambition in our hiring process. Adaptability is key as we navigate uncharted territories and redefine how business is conducted online.

Hiring at Proton is highly selective, with less than 1% of candidates hired. We believe smaller teams of exceptional talent will always prevail over larger teams with lower talent density. You will have the opportunity to work with many of the world's top minds in their fields, ranging from former international math and science olympiad winners to chess champions.

We have a global mindset and big ambitions but remain a start-up at heart. We value empowerment and flexibility and keep our structure flat to keep moving fast and avoid unnecessary politics. Tired of blending into the crowd? Join us and do work you can truly be proud of. Check our open-source projects here!

Purpose of the role: 

As the Engineering Manager for Proton VPN, for the iOS and MacOS team, you lead a team of engineers dedicated to fostering continuous innovation in our applications. Reporting to the Engineering Manager, you will collaborate with cross-functional teams across Proton. Your primary objective is to raise the quality and reliability of our Apple platform products, while ensure Proton VPN keep being extended with new and critical functionalities.

Responsibilities include: 

• Raise and maintain a high engineering bar for iOS and macOS VPN products by diagnosing quality issues, implementing clear processes, and ensuring delivery of robust, reliable features.
• Enhance team efficiency by balancing speed, quality, and developer experience through streamlined processes and structured ways of working.
• Collaborate closely with Product to address quality concerns while delivering on the roadmap.
• Strategically analyse engineering challenges and guide the team in breaking them down into manageable, iterative solutions—adjusting scopes to meet goals quickly without sacrificing quality.
• Ensure transparent communication of priorities, context, and technical decisions within the team and across stakeholders.
• Foster team growth through personalised 1-on-1s, performance evaluations, and career development plans.
• Oversee cross-team projects with R&D, Backend, Infrastructure, QA, and Product to ensure seamless coordination and execution
• Influence and collaborate with internal teams and stakeholders to align engineering efforts with business objectives and Proton’s security mission.

Job requirements:

• Experience managing Mobile teams, delivering Mobile products and navigating complex cross-team efforts.
• Proven track record of improving product quality and implementing processes in a fast-moving environment.
• Experience leading or contributing to release processes and delivering software at scale, ideally in networking, VPN, or other performance-critical domains.
• Strong understanding of mobile-specific engineering challenges and the ability to go deep technically when diagnosing issues.
• Skilled in project management—able to keep initiatives moving, align stakeholders, and ship high-quality releases.
• Clear, concise, and impactful communication skills.
• Comprehensive understanding of the full application lifecycle, from code reviews and CI/CD to deployment and post-release troubleshooting.
• Familiarity with low-level networking concepts (VPN protocols, DNS, TCP/IP) is beneficial.
• Passion for creating an environment where teams are motivated, collaborative, and focused on delivering exceptional user experiences.

What We Offer

• Office First: Collaboration is easier and more effective in person, which is why we have offices in Geneva, Zurich, Prague, Barcelona, Paris, London, Vilnius, Skopje, and Taipei. You can also enjoy working from home up to 30% of the time, while enjoying great company during our three core days in the office. Depending on the role, fully remote positions may also be available.
• Technology: We provide all the devices and software you need to excel in your role, ensuring you have the best tools at your disposal to achieve your goals.
• Food: Lunch and snacks are provided by Proton every day at our offices.
• Transport: We will always support our employees with transport costs through subsidizing public transport, bike allowances, or parking spaces based on your office location.
• Stock Options: At Proton, we are all owners of the company and you get stock options when you join us.
• Flexible Working: You can define your own working hours as long as it works with team meetings.
• Learning and Development: We are committed to your professional growth. Proton offers various learning opportunities, including training programs, conferences and events, and continual learning.
• Employee Benefits: Comprehensive health insurance plans, competitive retirement savings options, generous vacation and leave policies, and wellness programs.
• Work that Matters: Proton is a community-first organization, started with the support of a crowdfunding campaign and built with community input. To this day, Proton’s only source of revenue is user subscriptions. Over 100 million people trust and support Proton, and we put our users and community first in everything we do. Read more about our impact here.

Our Commitment to Diversity and Inclusion

At Proton, we believe diversity drives innovation and strengthens our mission to provide privacy as a default for all. We are committed to fostering an inclusive environment where all individuals, regardless of race, ethnicity, gender, age, sexual orientation, physical ability, or socio-economic background, feel valued and empowered. We strive to create equal opportunities, promote open dialogue, and support continuous learning to ensure every voice is heard and respected.

If you need any extra support or reasonable adjustments during the hiring process, please let your talent partner know.

Candidate Privacy Notice

When you apply for a position, refer a candidate, or are considered for a role at Proton Technologies AG (Proton, we, us, or our), your information is stored in Greenhouse, in accordance with their Service Privacy Policy. This information is used to evaluate your suitability for the posted position. We also retain this information for consideration for future roles that you may apply for or that we believe may align with your background and skills.

If we no longer have a legitimate business need to process your information, we will either delete or anonymize it. Should you have any inquiries about how we use or manage your information, or if you wish to access, correct, or delete your data, please contact our privacy team at careers@proton.ch.

Proton does not accept unsolicited resumes from any sources other than directly from candidates. We will not pay a fee for any placement resulting from an unsolicited offer, even if the candidate is subsequently hired by Proton.

To learn more about our privacy policy, please visit our privacy policy page.

#LI-ONSITE

About Proton

Join Proton and build a better internet where privacy is the default

Proton was founded in 2014 by scientists from CERN on a simple truth: privacy is a fundamental human right. Since then, we’ve built the world’s largest encrypted email service (Proton Mail) and expanded into Proton VPN, Proton Drive, Proton Pass, and Proton Calendar—tools used by millions globally to protect their freedom, fight censorship, and keep their data safe. In some situations, Proton has literally helped save lives!

We are profitable, independent (no VC control), and selectively hire from the top ~1% of applicants. Our 500+ team members across 50+ countries come from leading organizations and elite academic backgrounds. We move fast, keep hierarchy light, and prioritize impact over optics. If you want to do meaningful work with exceptionally high-caliber people, this is it. Join us and do work you can truly be proud of. Check our open-source projects here!

The team:

We're a tight-knit, passionate Android engineering team building privacy-first apps that are trusted by millions of people around the world — and yes, our code is open source, so your work is truly out there making a difference. We move fast, skip the bureaucracy, and genuinely care about what we ship. Whether you're deep in Espresso tests or debating architecture over lunch, you'll be surrounded by people who are as excited about quality as you are. If you love Android, hate flaky tests, and want your work to actually matter — you'll fit right in.

Tech Stack and Tools:

Kotlin, Java, Espresso, UI Automator, Maestro

What you will do:

• Design, develop, and maintain automated test frameworks and pipelines for Proton's Android applications

• Write and execute UI, functional, integration, and end-to-end test suites using modern Android testing tools and best practices

• Work hand-in-hand with Android developers to define testability requirements and embed automated tests into CI/CD workflows

• Hunt down bugs, document them clearly, and collaborate with the team to get them fixed fast

• Perform exploratory and risk-based testing with a sharp eye on privacy, data integrity, and security behavior

• Own and evolve the Android test infrastructure, including emulator farms, device labs, and test environment configurations

• Dig into test results, spot patterns, and turn findings into actionable improvements that raise the quality bar

• Champion QA best practices across the team and help shape how we think about quality at every stage of development

• Review test code with the same rigor as production code — maintainability and scalability matter here

• Keep up with the Android ecosystem, new testing frameworks, and open-source tooling so we're always ahead of the curve

What we are looking for:

• 3–5 years of hands-on experience in Android test automation, ideally on consumer-facing apps with a large user base

• Strong proficiency in Kotlin and/or Java, with solid experience writing clean, maintainable test code

• Proven experience with Android testing frameworks such as Espresso, UI Automator, or Maestro

• Good understanding of CI/CD pipelines and experience integrating Android tests with tools like GitLab CI, GitHub Actions, or similar

• Familiarity with Android emulators, physical device testing, and cloud-based device farms (e.g., Firebase Test Lab)

• Comfortable navigating Android Studio, ADB, and the broader Android development toolchain

• Experience with version control using Git, and a natural fit in an open-source collaborative workflow

• A good nose for security and privacy issues — understanding of privacy-by-design is a real plus

• Ability to read and understand application source code to sharpen test coverage and catch edge cases early

• Sharp analytical mindset with a structured, detail-oriented approach — you don't let things slip through the cracks

• Great communicator who thrives in a remote-friendly, internationally distributed team

• Genuine enthusiasm for open-source software, Android, and building technology that protects people's privacy

What We Offer:

• Work that Matters: millions of people trust Proton with their privacy. We answer only to our users — not advertisers, not investors with conflicting agendas, not governments. The work you do here is real, and the impact is measurable. (read more about our impact here)

• Stock Options: at Proton, we all have the opportunity to be owners of the company. From day one, you have a real stake in what we're building. When Proton wins, you win.

• Technology: you'll get the right hardware and the right software you need to do your best work.

• Learning & Development: we invest in your growth because sharp people make us better. Proton is one of the fastest ways to accelerate your career because you'll be thrown into real challenges, with real ownership, from day one.

• Employee Benefits: your wellbeing isn't an afterthought. We offer strong health coverage, solid retirement options, generous leave, and wellness support so you can bring your best self to work every day

• In-Person Collaboration: Amazing things happen when passionate, smart, and purposeful people get together in the same room. With offices across Geneva, Zürich, Barcelona, London and more, you'll spend most of your time collaborating face-to-face with people who genuinely care about what they're building

• Food: Lunch and snacks are on us every day in our offices so you can focus on the work and not on what's for lunch.

• Transport: getting to the office shouldn't cost you. We cover public transport, bike allowances, or parking, whichever works for you.

• Flexible Working: you own your schedule. Set hours that work for you and your team — because outcomes matter more than when the clock says you started.

Our Commitment to Diversity and Inclusion

At Proton, we believe diversity drives innovation and strengthens our mission to provide privacy as a default for all. We are committed to fostering an inclusive environment where all individuals, regardless of race, ethnicity, gender, age, sexual orientation, physical ability, or socio-economic background, feel valued and empowered. We strive to create equal opportunities, promote open dialogue, and support continuous learning to ensure every voice is heard and respected.

If you need any extra support or reasonable adjustments during the hiring process, please let your talent partner know.

Candidate Privacy Notice

When you apply for a position, refer a candidate, or are considered for a role at Proton Technologies AG (Proton, we, us, or our), your information is stored in Greenhouse, in accordance with their Service Privacy Policy. This information is used to evaluate your suitability for the posted position. We also retain this information for consideration for future roles that you may apply for or that we believe may align with your background and skills.

If we no longer have a legitimate business need to process your information, we will either delete or anonymize it. Should you have any inquiries about how we use or manage your information, or if you wish to access, correct, or delete your data, please contact our privacy team at careers@proton.ch.

Proton does not accept unsolicited resumes from any sources other than directly from candidates. We will not pay a fee for any placement resulting from an unsolicited offer, even if the candidate is subsequently hired by Proton.

To learn more about our privacy policy, please visit our privacy policy page.

Salary range (Vilnius) - 48.800 - 54.200 EUR gross annual 

#LI-Onsite

The Scale of the Challenge

At Flo we don't just have users, we have a global community. We are the #1 women's health app, in the last month alone, we saw 8.6M new installs and a 2.8M increase in active users.

When millions of people trust you with their most personal health data, security isn't a feature — it's a foundation. We are looking for a Cloud Security Engineer to join Velocity, our Internal Platform team. Your mission is to ensure that every system, pipeline, and tool our engineers rely on is secure by default — so they can ship fast without ever compromising trust.

The Mission: Velocity

The Velocity team exists to eliminate friction. We build and own the foundation everything else runs on: cloud infrastructure, developer tooling, and SRE practices. You will:

• Embed Security Into the Platform: Bake security, compliance, and best practices into the core stack so they're invisible to developers and impossible to skip.
• Automate Everything: Drive security-as-code across infrastructure, CI/CD pipelines, and container lifecycles — making manual gates a thing of the past.

What You Will Do

• Cloud Security Posture: Own and continuously strengthen Flo's AWS security posture using tools like GuardDuty, Inspector, Security Hub, and SSM Patch Manager.
• Container & Supply Chain Security: Harden container image security end-to-end — patch vulnerabilities automatically with Copacetic, sign and verify images with Cosign/Sigstore, and enforce policies at admission with Kyverno.
• Policy as Code: Manage CI/CD security across the organisation using policy-as-code tooling (Kyverno, Checkov), ensuring standards are enforced programmatically.
• Security Observability: Build visibility into security performance by measuring and visualising actionable metrics using tools like Databricks Dashboards or Looker.
• High-Scale Privacy: Support the infrastructure for industry-leading privacy features, such as our TIME-recognised "Anonymous Mode."
• Culture & Thought Leadership: Shape Flo's broader security culture through proactive engagement, documentation, and cross-team collaboration.

What You Bring

• Experience: 7+ years in Infrastructure Security, Cloud Security, or Security Engineering roles.
• Cloud Native Mastery: Deep expertise in AWS security services and best practices is essential.
• Infrastructure as Code: Proficient in Terraform and Terragrunt — you run everything as code.
• Container Security: Strong knowledge of Kubernetes security, image hardening, and admission control.
• Identity & Access: Solid understanding of identity management principles — SSO, OAuth, JWT, SAML.
• Automation Mindset: Comfortable scripting in Python, Bash, or similar to automate security workflows.
• Network Security: Understanding of modern network security principles and their practical application.
• SSDLC: Experience building Secure Software Development Lifecycle phases into engineering workflows.

Bonus Points

• Experience with security monitoring and event correlation systems (IDS/IPS, SIEM, AWS-native tooling).
• Knowledge of Zero Trust Architecture and its implementations (e.g., Cloudflare).
• Familiarity with secret management processes and tools.
• Experience in multi-cloud environments (AWS and preferably GCP).
• Understanding of business continuity principles (BIA, DRP).
• Professional accreditations such as AWS Security Specialty, CKS, or CISSP.

Why Join Flo?

• High Impact: Your work directly protects the health data of millions - Flo is rewriting women's health, and you'll make sure it's done securely.
• Autonomy: We hire experts and empower you to deliver.
• Cutting-Edge Stack: Work with modern security tooling (GuardDuty, Kyverno, Cosign, Elastic Cloud Security) deployed on real production infrastructure at massive scale.