Senior Full Stack Engineer

Join Aiven, a dynamic global team of over 400 professionals dedicated to redefining the landscape of open-source technology and multi-cloud solutions. Our mission is to empower developers, builders, and creators by providing a fast and straightforward cloud data platform that makes open-source databases, search, streaming, and application infrastructures rea…

Join Reaktor's award-winning technology community as a Senior Full Stack Software Engineer in Helsinki.Do you thrive in a low-hierarchy environment and have a passion for addressing human challenges through innovative software solutions? If so, we want to hear from you!Your Role:As a Senior Full Stack Software Engineer, you will be at the forefront of the software development lifecycle, bringing expertise in both front-end and back-end technologies, as well as infrastructure management.Key Responsibilities:Collaborate with clients' tech and business teams to select optimal technologies tailored to their requirements.Develop and implement new features encompassing changes to frontend applications, backend servers, and databases, including infrastructure modifications.Provide world-class technical guidance to clients and team members.Engage in software development tasks such as debugging, designing, and contributing to architectural decisions.Your Profile:We are seeking a curious and versatile developer who is proficient in both backend and frontend development and appreciates the significance of infrastructure.Required Qualifications:Proven experience across various software development domains (backend, frontend, operations, and consulting).While we do not enforce a strict years-of-experience requirement, the skills we seek typically take time to develop.Experience in at least one popular server-side programming language (TypeScript/JavaScript and Node.js preferred, but Java/Scala/Kotlin, Clojure, and Python are also relevant).Strong proficiency in at least one client-side language and framework, with a preference for TypeScript/JavaScript and React for web applications, and Swift, Java/Scala/Kotlin, or TypeScript/JavaScript React-native for mobile projects.Ability to design new backend services and establish CI/CD pipelines as necessary.Foundational knowledge of DevOps practices, including Continuous Integration, automated deployment, and test automation.Familiarity with databases such as PostgreSQL.

Join Reaktor’s award-winning technology community as a Full Stack Software Engineer in Helsinki!If you thrive in an environment where you can navigate the entire software development cycle, enjoy tackling complex human-centered challenges, and seek a collaborative, low-hierarchy workplace, you may be the perfect fit for our team.As a Full Stack Software Engineer at Reaktor, you will take on a diverse range of software development responsibilities, covering everything from frontend design to backend production.Your key responsibilities include:Collaborating closely with clients’ technical and business teams to identify and implement the most suitable technologies for their needs.Developing new features that may involve modifications to frontend applications, backend servers, and databases, as well as infrastructure enhancements.Providing exceptional technical expertise to both the client and the team.Engaging in other software development activities, including debugging, design, and architecture creation.The ideal candidate is a curious developer comfortable with both backend and frontend technologies and understands the significance of infrastructure in daily operations.To excel in this role, you’ll need:Experience across various software development modalities, including backend, frontend, ops, and consulting capabilities.No strict requirement for years of experience, but in-depth knowledge typically comes with years of dedication.Proficiency in at least one popular server-side programming language. Many of our current projects utilize TypeScript/JavaScript and Node.js, alongside Java, Scala, Kotlin, Clojure, and Python.Strong familiarity with at least one client-side language and framework, with frequent use of TypeScript/JavaScript and React for web applications, and Swift, Java/Scala/Kotlin, or React Native for mobile applications.Relevant skills to develop new backend services and create CI/CD pipelines as needed.A foundational understanding of DevOps practices, including Continuous Integration (CI), automated deployments, and test automation.Knowledge of databases, such as PostgreSQL.

At Mapbox, we are revolutionizing the way location data is utilized through our cutting-edge real-time location platform, empowering businesses to integrate location-awareness seamlessly. Our platform is favored by over 4 million developers for its unmatched flexibility, security, and privacy compliance, enabling organizations to craft unique and engaging experiences for their customers.About The Data Tooling TeamThe Data Tooling team plays a critical role in managing and enhancing Mapbox’s global basemap content, ensuring our customers receive the most accurate and up-to-date Live Map of the world. We leverage advanced data processing pipelines and proprietary tools to validate millions of data updates monthly, address thousands of weekly user feedback inputs, and transform user telemetry into actionable insights.We are on the lookout for a skilled Full-Stack Software Development Engineer to join our dynamic team, where you will take charge of advancing our mapping tools and capabilities.As AI integration becomes ever more crucial in modern engineering practices, we value engineers who can thoughtfully incorporate AI into their design, development, and decision-making processes. Your interview will include discussions on how you leverage AI in your engineering workflows.

Join Reaktor's award-winning technology community as a Full-Stack Software Developer in Helsinki!Are you passionate about navigating the full software development lifecycle? Do you thrive on solving real-world problems through a comprehensive approach? If you enjoy working in a flat organizational structure, you may be the perfect fit for our team.Your Role as a Full-Stack Developer at ReaktorAs a Full-Stack Developer, you will be responsible for a wide range of software development tasks, from front-end design to back-end production processes.Your daily responsibilities will include:Collaborating with client technology and business teams to identify and implement suitable technological solutions.Adding new features that necessitate modifications to frontend applications, backend servers, and databases, and occasionally infrastructure.Providing exceptional technical expertise to clients and team members.Engaging in additional software development tasks, including debugging, architectural design, and implementation.Who You AreYou are an inquisitive developer with proficiency in both backend and frontend application development and a solid understanding of infrastructure's role in your daily activities.To excel in this role, you will need:A diverse skill set across software development practices, including backend, frontend, operations, and consulting experience.While there is no strict experience requirement, most candidates typically accrue these competencies over several years.Experience with at least one popular server-side programming language; our projects frequently utilize TypeScript/JavaScript and Node.js, but also Java, Scala, Kotlin, Clojure, and Python.Strong proficiency in at least one client-side language and framework; common technologies include TypeScript/JavaScript and React for web applications, and Swift, Java/Scala/Kotlin, or TypeScript/JavaScript React Native for mobile applications.The relevant skills to create new backend services and establish CI/CD pipelines when required.A foundational understanding of DevOps principles, including Continuous Integration (CI), automated deployment, and test automation.Familiarity with databases, such as PostgreSQL.

Join Reaktor's award-winning tech community as a Full Stack Developer in Helsinki!If you thrive in a collaborative environment and possess a passion for tackling complex challenges through innovative software solutions, we want to hear from you. Our low-hierarchy culture fosters creativity and encourages you to contribute to all stages of the software development lifecycle.Your Role as a Full Stack Developer:In this position, you will:Collaborate closely with client tech and business teams to identify and implement the most suitable technologies for their projects.Develop and enhance features across frontend applications, backend servers, and databases, ensuring a seamless integration of components.Provide world-class technical expertise to both clients and team members.Engage in various software development activities, including debugging, design, and architecture creation.What We're Looking For:The ideal candidate will demonstrate:Proficiency in diverse software development practices, including backend, frontend, operations, and consulting.While we don't impose strict experience limits, extensive exposure to these competencies typically requires several years of dedication.Familiarity with at least one server-side programming language; our current projects frequently utilize TypeScript/JavaScript and Node.js, alongside Java/Scala/Kotlin, Clojure, and Python.Strong command of a client-side language and framework—most commonly, TypeScript/JavaScript and React for web applications, and Swift or React-native for mobile development.The skills necessary to develop backend services and construct CI/CD pipelines as project demands arise.Fundamental knowledge of DevOps principles, particularly Continuous Integration, automated deployment, and testing automation.Understanding of databases, such as PostgreSQL, and their integration within software solutions.

Join Tieto Tech Consulting as a Full-Stack Developer, where you will play a vital role in designing and implementing innovative software solutions. Collaborate with cross-functional teams to deliver high-quality applications that meet client needs.

Embark on an exciting journey with ASM, where innovation meets a collaborative spirit.With over 55 years of pioneering experience, ASM stands at the forefront of technological advancements. Our diverse team of more than 4,500 professionals from 70 nationalities is driving significant trends in 5G, cloud computing, artificial intelligence, and autonomous driving. We pride ourselves on being more than just a tech company; we are committed to diversity, inclusion, and sustainability, aiming to make a positive impact globally. Our development programs are designed to support your career growth, fostering innovation and unlocking potential. Join ASM as a Senior Engineer I in Equipment Engineering and play a pivotal role in semiconductor innovation! In this hands-on, technology-rich position, you will work closely with our state-of-the-art thermal and plasma ALD systems, ensuring optimal performance of tools vital for next-generation chip manufacturing. You will engage in an expert R&D and engineering environment, tackling complex mechanical, electrical, pneumatic, and vacuum systems; troubleshooting precision tools; and assisting engineers with high-impact hardware and process challenges. Your responsibilities will include investigating alarms, performing preventive maintenance, assisting in the installation of new equipment, and conducting root-cause analysis, all of which directly contribute to ASM’s reputation for outstanding reliability and performance.If you are passionate about problem-solving, working with cutting-edge equipment, and contributing to innovations that power technology globally—from smartphones to autonomous vehicles—this role places you at the heart of it all. You will enhance your skills, collaborate with top-tier engineers, and make a tangible impact, all while learning from industry leaders.

Embark on an innovative journey with ASM, where cutting-edge technology and a collaborative culture converge.For over 55 years, ASM has been a pioneer in technological advancement, consistently pushing the boundaries of what's possible. Our diverse team of over 4,500 ASMers from 70 nationalities plays a vital role in reshaping industries through our advanced semiconductor devices, influencing trends such as 5G, cloud computing, AI, and autonomous driving. We are not just a tech company; we are advocates for diversity, inclusion, and sustainability, aiming to create a positive impact on the world. Our development programs are designed to support your growth, shaping your future while fostering innovation and unlocking potential.We are seeking a skilled professional to join our Corporate Research & Development Team in Helsinki, Finland. As a Senior Process Engineer, you will have the opportunity to learn, develop, and apply your unique skills to drive groundbreaking innovations in atomic layer deposition (ALD). Collaborate with your colleagues to leverage your expertise in chemistry, material science, and process engineering to innovate—from conceptualization to integrated process flows—creating value for our internal and external customers. Beyond technical excellence, we value individuals who align with our values, collaborate effectively, and communicate transparently across teams. Your contributions today will shape the world of tomorrow.

Role Overview ASM International N.V. is seeking a Senior Engineer, Process Engineering to join the Global R&D Process Engineering Program in Helsinki, Finland. This position focuses on designing, improving, and implementing process solutions that support efficiency and quality across advanced technology projects. Key Responsibilities Work closely with cross-functional teams to develop and refine engineering processes. Contribute to the creation and optimization of process solutions for new and existing technologies. Support initiatives that improve efficiency and maintain high standards of quality. Location Based in Helsinki, Finland.

Join our dynamic global team of over 400 professionals dedicated to advancing open-source technology and multi-cloud solutions. At Aiven, we empower developers, builders, and creators to bring their visions to life swiftly and seamlessly through our innovative cloud data platform that offers easy access to open-source databases, search capabilities, streaming, and application infrastructure. The Role: We are seeking a talented Senior Software Engineer to enhance our cloud operations platform by transforming top open-source technologies into seamless cloud services. In this role, you will contribute to the development and optimization of PostgreSQL services, focusing on scalability and reliability. Our ethos revolves around automation to eliminate repetitive tasks across our processes. Our backend systems predominantly utilize Python, with elements of Java, Go, and C. What You'll Do: Develop high-quality, maintainable code, delivering robust features. Engage in technical discussions and conduct pull request reviews. Participate in technical planning and manage the project backlog. Assist in troubleshooting and resolving client issues. Mentor junior engineers and foster their professional development. Automate processes to enhance operational efficiency. Enhance the scalability and reliability of PostgreSQL services. What We're Looking For: We encourage you to apply even if your background does not perfectly match our requirements; we are committed to investing in the professional growth of our team members. Must Have: Proficiency in Python programming. Over 5 years of experience with one or more of the following databases: PostgreSQL, MySQL, MariaDB, SQL Server, OracleDB. Knowledge of backup solutions and strategies. Strong understanding of Linux operating systems. Experience with automated testing frameworks. Familiarity with distributed systems. Proven track record in performance optimization, bug fixing, and addressing security vulnerabilities. Fluent in English, both written and verbal. Nice to Have: Understanding of software and network security. Experience with infrastructure as code practices. Familiarity with cloud DBAAS production environments. Experience in production software environments. Excited to Join Us? If you believe Aiven is the right fit for you, we invite you to apply and become part of our innovative team!

Embark on a transformative career with ASM, where cutting-edge technology converges with a collaborative culture.With a legacy of over 55 years, ASM is a leader in technological innovation, continuously pushing the limits of what's possible. Our diverse team of over 4,500 ASMers from 70 nationalities contributes to significant advancements in 5G, cloud computing, AI, and autonomous driving. We believe in the power of diversity, inclusion, and sustainability to make a meaningful impact on society. Our robust development programs are designed to support your personal and professional growth, encouraging innovation and creativity.Position: Senior Process Engineer in 3D Integration/Advanced PackagingASM is a premier global supplier of products, services, and materials for semiconductor processing, with a commitment to innovation at our core. Our passionate and skilled professionals are dedicated to delivering avant-garde solutions to the world's leading semiconductor manufacturers. Every day, we strive to accelerate the development of next-generation chip technologies, remaining at the forefront of the industry.We are in search of an exceptional individual to join our Corporate Research & Development team in Helsinki, Finland. As a Senior Process Engineer, you will have the opportunity to learn, innovate, and leverage your unique skills in advancing atomic layer deposition (ALD) technologies. Collaborating closely with colleagues, you will apply your expertise in chemistry, material science, and process engineering to drive innovation from conceptualization to integrated process flows, ultimately creating value for our internal and external stakeholders. We seek individuals who resonate with our values of collaboration and communication, helping us shape the future together.Key Responsibilities:Develop and optimize processes for advanced packaging technologies.Collaborate with R&D teams to innovate and implement new methodologies.Conduct experiments and analyze data to enhance production efficiency.Engage with cross-functional teams to ensure project alignment and success.

Role overview AlphaSense is looking for a Senior or Staff Design Engineer to join the team in Helsinki, Finland. The position centers on shaping solutions that advance the company’s approach to information discovery. Collaboration with a range of teams is a key part of the role, with an emphasis on delivering high-quality and high-performance results. What you will do Create and refine solutions that directly support AlphaSense’s information discovery products Work closely with engineers, product managers, and other teams to develop new features Maintain high standards for both quality and performance in all delivered designs Location This role is based in Helsinki, Uusimaa, Finland.

At Oura, our mission is to empower every individual to harness their inner potential. Our award-winning products, including the Oura Ring and its connected app, enable our global community to gain profound insights into their readiness, activity, and sleep quality. We have positively impacted millions, providing daily insights and actionable steps that inspire healthier lifestyles.Empowerment begins with embracing our core values and nurturing our team. As a rapidly expanding company dedicated to enhancing health and happiness, we ensure our team members have the resources they need to excel, both professionally and personally.Our engineering team comprises talented Android and iOS developers located across the EU and the US. We organize our engineers into agile, cross-functional squads and system-level teams, granting them autonomy and accountability over their code. From concept to release, each team takes ownership of design, implementation, maintenance, and bug fixing.We are actively seeking experienced Senior Android Engineers to become a vital part of our app development organization. With multiple roles available across various teams, you will play a key role in developing innovative member-facing features and establishing foundational systems that ensure seamless connectivity and data synchronization between the Oura Ring and the app. Whether your passion lies in creating stunning user interfaces or architecting scalable, robust low-level systems, we have the perfect opportunity for you.This position can be performed on-site or remotely within Finland, with a preference for candidates who can visit our offices in Helsinki or Oulu regularly.

Join our innovative team at Varjo Technologies as a Senior Reliability Test Engineer. In this pivotal role, you will leverage your expertise to ensure the reliability and performance of our cutting-edge virtual and mixed reality products. Your contributions will directly impact the user experience and help us maintain our position as a leader in the immersive technology space.

About Speechify Speechify builds tools that make information accessible through audio. Users can listen to articles, documents, and books on the go or at their desks. The team focuses on making learning faster and more enjoyable. As a leader in audio information, Speechify continues to grow quickly. Role Overview The Senior Software Engineer, Core Experiences, joins a team responsible for the core services and SDKs that power Speechify’s products across multiple platforms. This position suits engineers who enjoy working where product and infrastructure meet. The work centers on designing reliable APIs and efficient systems that improve how users interact with Speechify. What You Will Do Work with Product Teams to define project scopes, streamline processes for faster customer feedback, and solve integration or UX challenges using Speechify’s cross-platform SDK. Improve existing features by designing efficient abstractions and enhancing algorithms, aiming for faster load times and smarter parsing. Write cloud functions, lightweight backend services, and job tasks, primarily using Kotlin. Location This position is based in Helsinki, Finland.

Join Mapbox, a leading real-time location platform revolutionizing navigation for modern, location-centric businesses. With over 4 million registered developers, we provide a robust suite of tools that enhance the navigation of people, packages, and vehicles globally. Our commitment to flexibility, security, and privacy compliance has made us the preferred choice for organizations seeking to create tailored and engaging experiences.About Our TeamAs part of the Automotive Integration team, you will engage with new automotive clients, seamlessly integrating their embedded systems with our innovative product offerings. You will implement custom solutions and provide ongoing technical support post-launch, while ensuring optimal performance through key performance indicators (KPIs) that we collect from customer hardware. Our platform underpins exceptional in-vehicle navigation experiences for industry leaders like BMW, GM, and Toyota, and we are rapidly expanding our portfolio.We seek dynamic, fast-learning team players who thrive on direct interaction with automotive customers and are dedicated to refining solutions that maximize the usage of our products in their embedded environments, aiming for the best navigation solutions on the market.As AI technology becomes integral to engineering workflows, we value engineers who can thoughtfully incorporate AI into their design, development, and decision-making processes. Expect discussions around your use of AI in engineering during the interview process.Your RoleAs a Senior Software Engineer (Android), you will be pivotal in developing software for next-generation automotive navigation systems.Your responsibilities will encompass:Analyzing the minimum requirements for automotive solutions, aligning them with reference platforms, and monitoring KPIs by gathering metrics from automotive clients' development setups or vehicles.Designing and implementing software solutions that enhance user engagement and experience within in-vehicle systems.Collaborating with cross-functional teams to ensure seamless integration of software components.

Oura Health Ltd. seeks a Senior Software Engineer to support the development and enhancement of its health technology platform. This position is hybrid, with work based in Helsinki, Uusimaa. Role overview The Senior Software Engineer will collaborate with colleagues from various disciplines to design and implement software systems. The role involves maintaining and refining features that impact user experience and engagement, while contributing to the evolution of Oura’s health technology products. What you will do Partner with cross-functional teams to design and build software systems Maintain and enhance features that improve user experience and engagement Support the ongoing development of Oura’s health-focused technology

At Oura, we are on a mission to help individuals unlock their full potential. Our award-winning products, including the Oura Ring and its accompanying app, empower users to gain deeper insights into their health, focusing on readiness, activity, and sleep quality. We have positively impacted millions by providing insightful data and actionable steps to foster healthier lifestyles. As a rapidly growing company dedicated to enhancing well-being, we prioritize our team’s needs to ensure optimal performance both in and out of the workplace. Our engineering division is composed of skilled Android and iOS developers located across the EU and the US. Our engineers operate within agile, cross-functional teams, enjoying the autonomy to take full ownership of their projects—from conception through design, implementation, and ongoing maintenance. We seek experienced Senior iOS Engineers to join our dynamic app development teams. Multiple roles are available, ranging from the creation of innovative features for our users to the development of foundational systems that ensure seamless connectivity and data synchronization between the Oura Ring and the app. Whether your passion lies in crafting visually stunning user interfaces or architecting robust, scalable systems, we welcome your expertise. This position allows for hybrid work arrangements within Finland, with a preference for candidates who can occasionally visit our offices in Helsinki or Oulu.

Role Overview Oura is looking for a Senior Fullstack Engineer to help advance its health technology platform. This role is based in Finland, with hybrid options in Helsinki (Uusimaa) or Oulu (North Ostrobothnia). What You Will Do Build and improve features across both front-end and back-end systems Work closely with a skilled engineering team to deliver a seamless user experience Contribute technical expertise to projects that support Oura’s mission of empowering people to manage their health Collaboration and Impact This position offers the chance to work alongside experienced colleagues, where engineering decisions have a direct effect on the product and its users.