Rust Jobs in Finland.
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Why Mozilla?
Mozilla Corporation is the non-profit-backed technology company that has shaped the internet for the better over the last 25 years. We make pioneering brands like Firefox, the privacy-minded web browser. Now, with more than 225 million people around the world using our products each month, we’re shaping the next 25 years of technology and helping to reclaim an internet built for people, not companies. Our work focuses on diverse areas including AI, social media, security and more. And we’re doing this while never losing our focus on our core mission – to make the internet better for people.
The Mozilla Corporation is wholly owned by the non-profit 501(c) Mozilla Foundation. This means we aren’t beholden to any shareholders — only to our mission. Along with thousands of volunteer contributors and collaborators all over the world, Mozillians design, build and distribute open-source software that enables people to enjoy the internet on their terms.
About this team and role:
The Localization Team manages the infrastructure that powers localization across all Mozilla products and services, and supports our global community of volunteer localizers. As a Senior Engineer, you’ll contribute to a range of Mozilla localization projects and technologies — from open source libraries like moz-l10n to Pontoon, our Django-based Translation Management System. You’ll also work on internationalization features that shape the experience of Firefox and other Mozilla products, and have the opportunity to engage with development of standards such as Unicode MessageFormat and DOM Localization.
You’ll contribute to architectural discussions and help drive feature development within the team. At Mozilla, Senior Engineers are expected to work independently on well-defined projects, collaborate closely with peers, and play a key role in delivering high-quality software that advances the team’s goals and Mozilla’s mission.
What you’ll do:
- Contribute to the development of Python and JavaScript libraries (such as moz-l10n) and tools that support Mozilla’s localization infrastructure.
- Improve localization and internationalization within the Firefox codebase to make features more adaptable and accessible across languages and regions.
- Collaborate with engineers and program managers to design and implement new Pontoon features.
- Engage with our community of volunteer developers and localizers to support and guide Mozilla’s localization efforts.
- Collaborate effectively with teammates and internal clients across regions and time zones.
What you’ll bring:
- Strong experience developing and maintaining libraries and tools using Python and JavaScript.
- Solid understanding of web technologies, APIs, and modern development workflows.
- Experience with open source development practices and community collaboration.
- Ability to collaborate effectively in a distributed team, across time zones and disciplines.
- Excellent communication skills, with an emphasis on clarity and working across technical and non-technical roles.
- Professional fluency in English (written and verbal).
- Commitment to our values:
- Welcoming differences
- Being relationship-minded
- Practicing responsible participation
- Having grit
Bonus points:
- Experience with internationalization (i18n) and localization (l10n) concepts, tools, or workflows.
- Programming experience in Rust and C++.
- Fluency in another language and understanding of linguistic diversity (e.g., grammar, plurals, text direction, and cultural conventions).
What you’ll get:
- Generous performance-based bonus plans to all eligible employees - we share in our success as one team
- Rich medical, dental, and vision coverage
- Generous retirement contributions with 100% immediate vesting (regardless of whether you contribute)
- Quarterly all-company wellness days where everyone takes a pause together
- Country specific holidays plus a day off for your birthday
- One-time home office stipend
- Annual professional development budget
- Quarterly well-being stipend
- Considerable paid parental leave
- Employee referral bonus program
- Other benefits (life/AD&D, disability, EAP, etc. - varies by country)
Mozilla exists to build the Internet as a public resource accessible to all because we believe that open and free is better than closed and controlled. When you work at Mozilla, you give yourself a chance to make a difference in the lives of Web users everywhere. And you give us a chance to make a difference in your life every single day. Join us to work on the Web as the platform and help create more opportunity and innovation for everyone online.
Commitment to diversity, equity, inclusion, and belonging
Mozilla understands that valuing diverse creative practices and forms of knowledge are crucial to and enrich the company’s core mission. We encourage applications from everyone, including members of all equity-seeking communities, such as (but certainly not limited to) women, racialized and Indigenous persons, persons with disabilities, persons of all sexual orientations, gender identities, and expressions.
We will ensure that qualified individuals with disabilities are provided reasonable accommodations to participate in the job application or interview process, to perform essential job functions, and to receive other benefits and privileges of employment, as appropriate. Please contact us at hiringaccommodation@mozilla.com to request accommodation.
We are an equal opportunity employer. We do not discriminate on the basis of race (including hairstyle and texture), religion (including religious grooming and dress practices), gender, gender identity, gender expression, color, national origin, pregnancy, ancestry, domestic partner status, disability, sexual orientation, age, genetic predisposition, medical condition, marital status, citizenship status, military or veteran status, or any other basis covered by applicable laws. Mozilla will not tolerate discrimination or harassment based on any of these characteristics or any other unlawful behavior, conduct, or purpose.
Group: D
#LI-REMOTE
Req ID: R2984
Hiring Ranges:
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Senior Fullstack Engineer
Our mission at Oura is to empower every person to own their inner potential. Our award-winning products help our global community gain a deeper knowledge of their readiness, activity, and sleep quality by using their Oura Ring and its connected app. We've helped millions of people understand and improve their health by providing daily insights and practical steps to inspire healthy lifestyles.
Empowering the world starts with living our values and empowering our team. As a quickly growing company focused on helping people live healthier and happier lives, we ensure that our team members have what they need to do their best work — both in and out of the office.
We are part of the software engineering Core Platform mission - the heartbeat of Oura. Core Platform drives operational excellence by delivering capabilities that empower teams to build securely and scale reliably without compromising speed. We are looking for a Senior Fullstack Engineer to contribute to the Tooling and Releases squads of the mission. We provide business-critical capabilities that power Oura’s state-of-the-art rollouts of new features, world-class Member eXperience troubleshooting, and next gen internal hub for launching bespoke tooling applications with the power of AI.
This is a hybrid role with preferred locations of Helsinki, Tampere or Oulu where the majority of our team is located. We will also consider outstanding candidates in the rest of Finland.
While we have high expectations for this demanding role, we recognize that few candidates will perfectly match every single requirement. For this role, we put relative emphasis on frontend tech excellence. We strongly encourage you to apply if you meet the core criteria and are passionate about our mission.
What You will do:
- Design and Implement End-to-End Systems: Build secure & scalable internal applications that power Oura’s rollout capabilities, troubleshooting workflows, and our next-gen AI-powered internal hub.
- Lead Frontend Excellence: Create sophisticated, performant UIs using TypeScript (React or Vue) and Vite to ensure a seamless, modular and future-proof internal tool ecosystem.
- Develop High-Performance Services: Create high-availability, low-latency backend services to deliver critical configurations and content to millions of Oura members and serve Ouranians needs.
- Drive Engineering Excellence: Take a leading role in leveraging future technologies, especially AI, across the software organization and championing engineering excellence through continuous operational improvements.
- Collaborate Across Missions: Work closely with Product Managers and engineering teams (Mobile, Cloud, Firmware, etc.) to translate complex internal needs into delightful developer experiences.
- Own Infrastructure & Delivery: Manage and scale our cloud environment using Infrastructure as Code (Pulumi, Helm) and modern CI/CD patterns to ensure reliable, automated deployments.
We would love to have You on our team, if You have:
- Extensive Experience: 5+ years of professional software development experience, with a proven track record of delivering complex full-stack projects.
- Outstanding AI-Native Proficiency: Deep experience with agentic workflows and tools (e.g., Cursor, agentic CLIs), treating AI as a high-output collaborator to fundamentally reshape and accelerate the software lifecycle across craft and organization.
- Mastery of Modern Web Tech: Deep expertise in TypeScript and modern frontend frameworks (React or Vue), including experience with state management and micro-frontend architectures.
- Robust Backend Skills: Strong proficiency in building production-grade APIs and services with Python or Rust.
- Database Versatility: Solid competence working with both SQL (PostgreSQL) and NoSQL (DynamoDB, Firestore, Redis) databases.
- Cloud & DevOps Fluency: Practical experience with AWS (EKS, SQS/SNS, S3) and containerization, along with a "DevOps mindset" toward monitoring (Sentry, OTEL) and automation.
- Ownership Mentality: A proactive attitude with the ability to take a rough idea and turn it into a concrete, high-impact product.
- Passion for DevX: A genuine interest in improving developer productivity through easy-to-use tooling and great engineering practices.
- Communication: Excellent verbal and written communication skills in English.
What we offer:
At Oura, we care about you and your well-being. Everyone here at Oura has a ring of their own and we are continually looking to improve employee health.
Together we will continue to define Oura as a company where you can:
- Contribute to a product that improves the lives of millions of people across the globe
- Achieve great work-life balance and inspired work by focusing on what is important
- Grow on your chosen career path and sharpen your abilities - be it technical, people, or leadership skills
Benefits
- A competitive salary and equity packages
- Lunch and wellness benefits
- Flexible working hours + work-life balance
- Collaborative, smart teammates and innovative environment
- An Oura ring of your own + employee discount for friends and family
- Eight extra days time-off per year to devote to personal wellness
- Latest equipment of your choice
If this sounds like the next step for you, please send us your application and CV as soon as possible. We will fill the position as soon as we find a suitable candidate.
Oura is proud to be an equal opportunity workplace. We celebrate diversity and are committed to creating an inclusive environment for all employees. Individuals seeking employment at Oura are considered without regard to age, ancestry, color, gender (including pregnancy, childbirth, or related medical conditions), gender identity or expression, genetic information, marital status, medical condition, mental or physical disability, national origin, protected family care or medical leave status, race, religion (including beliefs and practices or the absence thereof), sexual orientation, military or veteran status, or any other characteristic protected by federal, state, or local laws. We will not tolerate discrimination or harassment based on any of these characteristics.
We will work to ensure individuals with disabilities are provided reasonable accommodation to participate in the interview process, to perform essential job functions, and to receive other benefits and privileges of employment.
Disclaimer: Beware of fake job offers!
We’ve been alerted to scammers posing as ŌURA recruiters, especially for remote roles. Please note:
- Our jobs are listed only on the ŌURA Careers page and trusted job boards.
- We will never ask for personal information like ID or payment for equipment upfront.
- Official offers are sent through Docusign after a verbal offer, not via text or email.
Stay cautious and protect your personal details.
To all recruitment agencies: Oura does not accept agency resumes. Please do not forward resumes to our jobs alias, Oura employees, or any other organization's location. Oura is not responsible for any fees related to unsolicited resumes.
Ready to apply?
Apply to Ōura
Our mission at Oura is to empower every person to own their inner potential. Our award-winning products help our global community gain a deeper knowledge of their readiness, activity, and sleep quality by using their Oura Ring and its connected app. We've helped millions of people understand and improve their health by providing daily insights and practical steps to inspire healthy lifestyles.
Empowering the world starts with living our values and empowering our team. As a quickly growing company focused on helping people live healthier and happier lives, we ensure that our team members have what they need to do their best work — both in and out of the office.
We are looking for a Senior Software Engineer, DataFlow (Android), to focus on core Android components responsible for storage and movement of data between Oura’s mobile app and cloud.
We’re looking for exceptional people. If you lack “senior-level” experience but are otherwise highly capable please do apply. Staff+ engineers will also be considered, though make that clear in your application.
This role is hybrid, as you'll work a day or so a week at the Helsinki Office at Pohjoisesplanadi 37. We don't have any strict policy on this as a company, but as a team we appreciate spending some time face to face.
Team size: 6-10
DataFlow team core mission:
- Reduce the effort required to store and query data that needs to be available in Oura’s app and across the cloud
- Empower feature teams to develop end-to-end features without the need to involve backend engineers.
- Evangelize compliance with standardized data schemas, data quality and data lifetime management.
- Ensure our systems are performant, scalable and cost-efficient, able to handle millions of active users and PBs of data.
The dataflow team is a platform team - most of the work is internal-facing. UI work is rare.
The team includes android, iOS, backend, and “full-stack” engineers that do both app-side and backend work.
This role:
You will be one of the core Android engineers for this team. The focus area may naturally shift over time but the following provides an idea of the work being done:
- Writing kotlin code (for the most part)
- Improving app-cloud data sync, including: reliability, latency, performance, observability.
- Improving app-side data storage: performance, data access api design, data migration systems, etc.
- Implementing automation and codegeneration layers.
- Supporting a variety of work in the platform domain, including data management and more.
You will participate in both design and implementation work. This being a platform team with internal users, we expect team members to be proactive in identifying opportunities for improvement at feature and architecture level.
Technologies:
- Android: Kotlin, (with some C++ libs, mostly in other domains), RealmDB (we’re migrating away from it), Sqlite
- Backend: Python, Rust, AWS
- Misc: some TypeScript
We believe great engineers have a solid understanding of the fundamentals and learn quickly. Hence it’s more important that you can showcase excellence than having experience with specific tech.
What we’re looking for:
- Experience with mobile development
- Ideally, proficient in Kotlin programming and modern Android app architecture. iOS experience is also considered.
- Previous experience solving challenging technical problems.
- Broad knowledge of software fundamentals, testing, concurrency, databases, and system design.
- Ability to take ownership of projects, design technical solutions, drive implementation, and deliver results with limited guidance.
- Ability to mentor other engineers and increase developer productivity across teams.
- Ability to produce high quality code quickly (with and without AI) - you identify yourself as a prolific programmer.
- Driven by value creation and overall impact.
- Team player with great spoken and written communication skills.
- Motivated to learn and further develop your skills
Not required but potentially relevant:
- Knowledge of distributed systems, data syncing mechanisms and challenges (data consistency, etc).
- Experience with HTTP API design: if interested, there is potential to work on both the backend APIs and the Android integration for new features
- Experience with JNI and C/C++ code.
- Experience writing highly performant code at lower and higher level, including application profiling.
- Knowledge of iOS - if interested, there is potential to contribute on both Android and iOS.
Oura is proud to be an equal opportunity workplace. We celebrate diversity and are committed to creating an inclusive environment for all employees. Individuals seeking employment at Oura are considered without regard to age, ancestry, color, gender (including pregnancy, childbirth, or related medical conditions), gender identity or expression, genetic information, marital status, medical condition, mental or physical disability, national origin, protected family care or medical leave status, race, religion (including beliefs and practices or the absence thereof), sexual orientation, military or veteran status, or any other characteristic protected by federal, state, or local laws. We will not tolerate discrimination or harassment based on any of these characteristics.
We will work to ensure individuals with disabilities are provided reasonable accommodation to participate in the interview process, to perform essential job functions, and to receive other benefits and privileges of employment.
Disclaimer: Beware of fake job offers!
We’ve been alerted to scammers posing as ŌURA recruiters, especially for remote roles. Please note:
- Our jobs are listed only on the ŌURA Careers page and trusted job boards.
- We will never ask for personal information like ID or payment for equipment upfront.
- Official offers are sent through Docusign after a verbal offer, not via text or email.
Stay cautious and protect your personal details.
To all recruitment agencies: Oura does not accept agency resumes. Please do not forward resumes to our jobs alias, Oura employees, or any other organization's location. Oura is not responsible for any fees related to unsolicited resumes.
Ready to apply?
Apply to Ōura