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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:
We we are looking for:
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
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
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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.
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.
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
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
🌎 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
Job Application Tip
We recognise that candidates feel they need to meet 100% of the job criteria in order to apply for a job. Please note that this is only a guide. If you don’t tick every box, it’s ok too because it means you have room to learn and develop your career at SumUp.
Ready to apply?
Apply to SumUp
Share this job
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.
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.
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
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
Job Application Tip
We recognise that candidates feel they need to meet 100% of the job criteria in order to apply for a job. Please note that this is only a guide. If you don’t tick every box, it’s ok too because it means you have room to learn and develop your career at SumUp.
Ready to apply?
Apply to SumUp
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.
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.
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.
Nice to have: Professional certifications such as CIA, CISA, CPA, CISSP, CISM, or CRISC; knowledge of data analytics tools.
🌎 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.
Job Application Tip
We recognise that candidates feel they need to meet 100% of the job criteria in order to apply for a job. Please note that this is only a guide. If you don’t tick every box, it’s ok too because it means you have room to learn and develop your career at SumUp.
Ready to apply?
Apply to SumUp
Share this job
Shift4 (NYSE: FOUR) is boldly redefining commerce by simplifying complex payments ecosystems across the world. As the leader in commerce-enabling technology, Shift4 powers billions of transactions annually for hundreds of thousands of businesses in virtually every industry. For more information, visit www.shift4.com.
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
Qualifications
Preferred Qualifications:
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.
We are an Equal Opportunity Employer and do not discriminate against any employee or applicant for employment because of race, color, sex, age, national origin, religion, sexual orientation, gender identity and/or expression, status as a veteran, and basis of disability or any other federal, state or local protected class.
Ready to apply?
Apply to Shift4 LithuaniaAre 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.
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.
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.
Nice to have: Professional certifications such as CIA, CISA, CPA, CISSP, CISM, or CRISC; knowledge of data analytics tools.
🌎 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.
Job Application Tip
We recognise that candidates feel they need to meet 100% of the job criteria in order to apply for a job. Please note that this is only a guide. If you don’t tick every box, it’s ok too because it means you have room to learn and develop your career at SumUp.
Ready to apply?
Apply to SumUp
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.
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.
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.
Nice to have: Professional certifications such as CIA, CISA, CPA, CISSP, CISM, or CRISC; knowledge of data analytics tools.
🌍 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.
Job Application Tip
We recognise that candidates feel they need to meet 100% of the job criteria in order to apply for a job. Please note that this is only a guide. If you don’t tick every box, it’s ok too because it means you have room to learn and develop your career at SumUp.
Ready to apply?
Apply to SumUp
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
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.
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.
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.
🌎 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.
Job Application Tip
We recognise that candidates feel they need to meet 100% of the job criteria in order to apply for a job. Please note that this is only a guide. If you don’t tick every box, it’s ok too because it means you have room to learn and develop your career at SumUp.
Ready to apply?
Apply to SumUp
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.
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.
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.
Nice to have: Professional certifications such as CIA, CISA, CPA, CISSP, CISM, or CRISC; knowledge of data analytics tools.
🌎 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.
Job Application Tip
We recognise that candidates feel they need to meet 100% of the job criteria in order to apply for a job. Please note that this is only a guide. If you don’t tick every box, it’s ok too because it means you have room to learn and develop your career at SumUp.
Ready to apply?
Apply to SumUp
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:
Job requirements:
Technical Skills
Bonus points for:
Soft Skills
What We Offer
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
Ready to apply?
Apply to ProtonAbout 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
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About Digital.ai
Digital.ai is the only AI-powered software delivery platform purpose-built for the enterprise, enabling the world’s largest organizations to build, test, secure, and deliver high-quality software. By unifying AI-driven insights, automation, and security across the software development lifecycle, Digital.ai empowers enterprises to deliver innovation with confidence. Trusted by 5,000 global enterprises, Digital.ai is redefining how enterprises build better software in an AI-driven world. Additional information about Digital.ai can be found at digital.ai and on Twitter, LinkedIn, and YouTube.
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.
For this position we offer a gross salary of 5,200 - 6,250 EUR/month depending on the level of experience.
Digital.ai offers great benefits including:
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.
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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:
Job requirements:
What We Offer
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.
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Apply to ProtonShare this job
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
Ready to apply?
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500M+ downloads. 80M+ monthly users. A decade of building – and we’re still accelerating.
Flo is the world’s #1 health & fitness app worldwide on a mission to build a better future for female health. Backed by a $200M investment led by General Atlantic, we became the first product of our kind to reach a $1B valuation in 2024 – and we’re not slowing down.
With 7M paid subscribers and the highest-rated experience in the App Store’s health category, we’ve spent 10 years earning trust at scale. Now, we’re building the next generation of digital health – AI-powered, privacy-first, clinically backed – to help our users know their body better.
The job
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 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:
How we work
We’re a mission-led, product-driven team. We move fast, stay focused and take ownership – from brief to build to impact. Debate is encouraged. Decisions are shared. We care about craft, ship with purpose, and always raise the bar.
You’ll be working with people who take their work seriously, not themselves. It takes commitment, resilience, and the drive to keep going when things get tough. Because better health outcomes are worth it.
What you'll get
We support impact with meaningful reward. Here’s what that looks like:
Diversity, equity and inclusion
Our strength is in our differences. At Flo, hiring is based on merit, skill and what you bring to the role – nothing else. We’re proud to be an equal opportunity employer, and we welcome applicants from all backgrounds, communities and identities. Read our privacy notice for job applicants.
Ready to apply?
Apply to Flo Health
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