Full Stack Software Engineer

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 Engi…

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.

About HappeoHappeo is an innovative Series B startup transforming organizational collaboration and communication with our all-in-one social intranet platform. By integrating collaboration tools, knowledge sharing, and internal communications, we empower teams to connect seamlessly and remain aligned.We take pride in fostering a vibrant and collaborative culture that prioritizes high-quality solutions and professional growth. There’s no bureaucracy here; just talented individuals working on meaningful projects.About the RoleAs an AI Engineer, you will collaborate with our development team to enhance Happeo's proprietary technology for intranet information management. Our platform enables organizations to discover information swiftly, pinpoint gaps or outdated content, and streamline the creation and sharing of workflows. We are on the verge of launching our Open Beta phase, presenting exciting challenges in content intelligence and search.Our Tech StackWe utilize React/React Native for our frontends, and Python/Node.js/Java for our backends, all hosted on Google Cloud Platform (GCP) including App Engine, Cloud Run, Kubernetes, Cloud SQL, Firestore, and Vertex AI.Your ResponsibilitiesManage entire features from ideation to production deploymentMake independent technical decisions while collaborating with cross-functional teamsIdentify and advocate for product opportunities that may be overlookedOptimize performance and scalability based on prioritiesStay updated on AI/ML advancements and evaluate their adoptionWhat We SeekExperience in developing production-grade AI agents, MCP servers, and related toolingA profound understanding of AI/ML methodologies and their applications

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 readily accessible.The Role:We are seeking a Senior Full Stack Engineer to become a vital member of our PostgreSQL Developer Experience team. This team is on a clear mission: to simplify modern application development, backed by the world’s most resilient Postgres database.As a full-stack engineering specialist, you will translate complex PostgreSQL features into elegant, user-friendly interfaces for developers. You will act with urgency and a proactive mindset, exercising sound judgment to balance innovation, risk, and opportunity with release timelines and project scopes.Our back-end systems are primarily developed in Python, with components in Go and C, while the front end utilizes React and TypeScript.In this role, you will not only execute tasks but also shape the PostgreSQL experience for developers, making it enjoyable, discoverable, and easy to adopt.What You’ll Do:Deliver End-to-End Developer Experience: Own the technical implementation throughout the entire user journey—from onboarding and data migration to ongoing usage, developer satisfaction, and growth opportunities.Build Intuitive Interfaces: Design and develop front-end applications, dashboards, and developer tools that facilitate the seamless adoption and use of PostgreSQL.Obsess Over Usage Data: Analyze and monitor product usage to understand developer behaviors, identify friction points, and drive data-informed enhancements.Experiment & Iterate Quickly: Work in agile cycles, delivering prototypes and features swiftly to test adoption and enhance the user experience.Work Across a Modern Codebase: Collaborate on a technology stack where back-end systems are primarily Python, with modules in Go and C, and the front end is built with React and TypeScript.Champion Quality at Speed: Produce high-quality, maintainable code while embracing agility and rapid iteration, and participate in technical planning to steer architectural decisions.Collaborate Cross-functionally: Partner with back-end engineers, product managers, and design teams to foster a cohesive development environment.

airapps is looking for a React Native Engineer to join the team in Helsinki. This position centers on building mobile applications that are scalable and responsive, with a strong emphasis on user experience and thoughtful design. What you will do Develop and maintain mobile apps using React Native Work closely with colleagues to design and implement new features Keep applications responsive and high-quality Apply mobile development best practices throughout the project lifecycle Requirements Experience with React Native Solid understanding of mobile development principles Comfort working in a collaborative team setting Interest in building applications that enhance user experience Location This role is based in Helsinki.

About AlphaSense: AlphaSense is trusted by the world's most advanced companies to eliminate uncertainty in decision-making. Our AI-driven market intelligence platform provides crucial insights sourced from reliable content. Our extensive database encompasses public and private materials, including equity research, company filings, event transcripts, expert calls, news articles, trade journals, and clients' proprietary research.The recent acquisition of Tegus by AlphaSense in 2024 propels our unified mission to empower professionals with smarter decision-making tools through enhanced AI market intelligence. This partnership will drive growth, innovation, and content expansion, equipping users to extract deeper insights from a myriad of content sets. With over 6,000 enterprise clients, including a significant portion of the S&P 500, AlphaSense is a leader in the industry. Founded in 2011, our headquarters is in New York City, with a diverse team of more than 2,000 employees spread across the globe, including offices in the U.S., U.K., Finland, India, Singapore, Canada, and Ireland. Join us on this exciting journey!About the Role:We are seeking a Principal Software Engineer to spearhead the development of API-first product platforms at AlphaSense. You will play a pivotal role in creating platforms that support various product interfaces, integrations, and intelligent workflows.In this position, your focus will be on crafting platforms as products: building well-designed APIs, establishing clear contracts, ensuring robust reliability, and developing a roadmap that reflects genuine product requirements. These platforms will be utilized by internal product teams and external integrations, including AI agents.This role uniquely blends hands-on engineering with cross-functional technical leadership. You will remain engaged with the codebase while shaping the design, evolution, and adoption of product platforms throughout the organization. Collaboration with multiple teams and domains will be key as you align long-term technical strategies while owning end-to-end systems. This position is not about people management or merely providing architectural advice; we are looking for a Principal who thrives on building, prototyping, iterating, and resolving complex challenges in production environments.What You’ll Do:Serve as the technical owner and multiplier for API-first architecture across the organization.Design, construct, and enhance high-scale APIs utilized by internal teams, external customers, and AI-driven agents.

What does it mean to be a Consultant at Netlight?At Netlight, our consultants engage in vital projects that drive digital transformation. Our mission is to unlock the full potential of our clients and ourselves. You will play a crucial role in shaping the software products and technical solutions of the future, collaborating closely with both colleagues and clients. We believe in customizing roles to fit individual strengths, interests, and market demands. Here, you will have the freedom to chart your career path, select your projects, and define your role. You will benefit from mentorship, coaching, and networking opportunities to facilitate your personal and professional development. The scope for growth is limitless!Our focus extends beyond just digital products; we aim to create a positive impact on teams and businesses. Our projects cover a broad technical spectrum, including Fullstack Development, Backend, Data Science & Engineering, Cloud Solutions, Architecture, Web Development, AI solutions, DevOps, and more.

Role Overview Unity Technologies is looking for a Software Engineer to join the Unity Services Foundation team in Helsinki, Finland. This role focuses on improving Web API development and optimizing core API Gateways that process over a billion calls every day. The Gateway platform supports essential features such as authentication, authorization, and rate limiting, making it easier for service teams to publish and operate APIs at scale while maintaining high standards for quality and consistency across all Unity services. What You Will Do Develop and enhance features that address API management challenges Support the platform strategy that shapes how Unity services are delivered and maintained Work on backend and infrastructure projects critical to Unity’s products Collaborate with senior backend developers and the product team to deliver reliable and secure solutions What Matters Here Code maintainability and long-term reliability Performance and resiliency of backend systems Security across all API interactions Delivering a strong developer experience for internal teams This position offers the chance to influence the way Unity’s customers interact with its products by building the foundation for consistent, scalable, and secure APIs.

Role overview airapps is seeking a Search Engine Optimization (SEO) Specialist to join the team in Helsinki. The main goal for this role is to increase online visibility and support organic growth by improving how the company appears in search results. The SEO Specialist will design and carry out strategies to raise search engine rankings and attract more visitors to airapps’ digital platforms. What you will do Apply SEO strategies aimed at increasing organic website traffic and improving search rankings Work closely with colleagues from different teams to review and enhance website content Make sure all published content follows current SEO best practices Location This role is located in Helsinki.

Rituals Cosmetics is looking for a Shop Manager to lead the team at the Helsinki Outlet. This position centers on creating a welcoming atmosphere and ensuring every customer enjoys a memorable visit. What you will do Guide and support the store team to deliver attentive, knowledgeable service Oversee daily store operations and maintain high standards on the shop floor Drive sales by motivating the team and monitoring performance Keep the store well-stocked and visually appealing in line with Rituals brand values Role overview This role focuses on both people leadership and operational management. The Shop Manager sets the tone for customer experience, ensures smooth day-to-day running, and helps the team meet sales goals at the Helsinki Outlet.

Join Mapbox, the premier real-time location platform designed for the next generation of location-aware enterprises. Our unique platform provides organizations with a comprehensive suite of tools to facilitate seamless navigation for people, packages, and vehicles globally. With over 4 million developers choosing Mapbox for its flexibility, security, and compliance with privacy standards, our applications, data, SDKs, and APIs empower businesses to craft personalized, engaging experiences for their customers.About Our TeamAt Mapbox, the Automotive Integration team is responsible for onboarding automotive clients, integrating their embedded systems with our product suite, creating tailored solutions, and delivering technical support post-launch. We track product quality through key performance indicators (KPIs) sourced from automotive hardware, ensuring optimal use of our SDKs by refining our products to meet client needs. Our offerings enhance in-vehicle navigation experiences, featuring solutions like Mapbox Dash, as well as individual components such as the Mapbox Maps SDK, tailored for Linux Embedded platforms. Our solutions serve renowned clients, including BMW, GM, and Toyota, with an expanding portfolio.Explore Navigation SolutionsDiscover Automotive SolutionsWe seek intelligent, quick-learning team players who are eager to engage with automotive clients and provide tailored solutions that maximize their embedded experience, continuously enhancing the market’s leading navigation solutions.As AI becomes integral to modern engineering processes, we value engineers capable of thoughtfully incorporating AI into their design, development, and decision-making workflows. Our interview process will involve discussions on the integration of AI within your engineering practices.

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.

The Global Events Manager at Aiven shapes memorable brand experiences across both in-person and virtual settings. This role involves much more than logistics: it calls for building environments that resonate within the tech industry and leave a lasting impact. Events range from major conferences such as AWS re:Invent and Kafka Summit to Aiven’s own initiatives, including Customer Advisory Boards, User Roadshows, and the Annual Sales Kick-off. What you will do Plan and deliver a diverse global event calendar, including large industry trade shows and internal programs. Take ownership of the "Aiven Experience" at all events, ensuring consistency and quality at Customer Advisory Boards, User Conferences, Community Roadshows, and the Annual Employee Kick-off. Design events with a deep understanding of key audiences, Developers, Architects, CTOs, while reflecting Aiven’s internal culture in every detail. Develop creative concepts that help Aiven stand out, taking thoughtful risks to strengthen the company’s position at industry gatherings. Oversee the full lifecycle of multiple global events, managing timelines, budgets, and deliverables with a focus on maintaining high standards under pressure. Represent Aiven at events, communicating the company’s value, connecting with prospects, and facilitating introductions to technical and sales teams. Direct a network of global vendors and boutique agencies, ensuring all event assets, from promotional materials to large-scale booths, meet Aiven’s quality expectations. Collaborate with Revenue Marketing and Operations to set measurable goals, manage lead capture, and report on event outcomes such as ROI, pipeline influence, and customer growth. What helps in this role Strong project management skills and creativity in event design. Ability to engage with both vendors and senior technical leaders. Comfort working across multiple projects and time zones. Understanding of Aiven’s brand, values, and audiences. Location This role is based in Helsinki, Uusimaa, Finland.

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 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.

Role overview airapps seeks a Site Reliability Engineer to join the team in Helsinki. The focus is on building and maintaining reliable, scalable, and high-performing applications. Collaboration with engineering is central to supporting and improving the company’s cloud infrastructure. What you will do Maintain and enhance the reliability of airapps' applications Scale systems to support company growth Monitor and fine-tune application performance Automate operational tasks to improve efficiency Requirements Interest in automation and system reliability Strong understanding of cloud infrastructure Location This role is based in Helsinki.

At Oura, our mission is to empower individuals to unlock their full potential. Our award-winning products, including the Oura Ring and its connected app, provide users with valuable insights into their readiness, activity, and sleep quality. By offering daily insights and actionable steps, we have supported millions in their journey toward healthier lifestyles.We believe that empowering people begins with living our core values and fostering a supportive environment for our team. As a rapidly growing company dedicated to promoting health and happiness, we ensure our team members have the resources they need to excel, both professionally and personally.We are currently seeking a dedicated Quality Assurance Engineer, referred to as the Quality Assurance Champion, to join our Medical Device team. In this role, you will play a critical part in ensuring compliance with the standards and regulations that govern medical device software development at Oura. You will collaborate closely with our Software as a Medical Device (SaMD) development teams to bridge the gap between stringent regulatory compliance and our dynamic innovation processes. This position requires teamwork across the organization to maintain strict adherence to Quality Management System (QMS) standards throughout the product lifecycle. You will lead the cross-functional management of our QMS, ensuring that all workflows, from supplier selection to software validation, are aligned with international regulations while maintaining agility and speed. We seek a candidate driven by a commitment to quality excellence and a passion for delivering impactful medical solutions that enhance the lives of millions globally.

We are seeking a dedicated and experienced Quality Manager to oversee our Data Centres division in Helsinki. In this pivotal role, you will ensure the highest standards of quality are maintained across all operations and projects, driving continuous improvement and excellence within the team.Your responsibilities will include developing and implementing quality management systems, conducting audits, and collaborating with various departments to align quality objectives with business goals. You will play a crucial role in fostering a culture of quality and compliance throughout the organization.

Note: This position requires regular travel to Estonia from our Helsinki office. About Viva.com Viva.com is a European Tech Bank for Businesses, offering omnichannel payment acceptance, card issuing, loans, and deposit accounts. Licensed by the Bank of Greece, Viva.com operates under the EU FOS regime in 22 EU countries. The company is known for its Tap on Any Device technology, which lets businesses accept payments on any device or even without dedicated hardware. With a network of over 450 tech partners, Viva.com connects to local payment schemes and alternative payment methods, supporting businesses with a broad suite of financial services. Role Overview The Senior Partner Relationship Manager will support European and Nordic partners as they expand into Estonia. The focus is on Independent Software Vendors (ISVs) and other partners, activating existing relationships, supporting ongoing interactions, and gathering structured market feedback from both partners and merchants. The role requires frequent travel to Tallinn and close collaboration with the Finland Country Manager to ensure smooth onboarding, verification, and activation of new merchants. What You Will Do Manage onboarding, verification, and activation of new merchants for partners Identify and engage new prospective partners to expand collaboration Handle partner requests and escalate complex issues as needed Serve as the main point of contact for partners Drive production and growth within the Indirect Team Show interest in AI-powered tools and readiness to work in AI-enhanced settings Requirements Willing and able to travel frequently to Estonia for business At least 5 years of experience in cross-functional roles within payments, POS/EPOS solutions, or fintech

Mapbox is the premier platform for real-time location services, empowering a new wave of location-aware businesses. Our unique infrastructure offers organizations a comprehensive suite of tools to facilitate navigation for people, packages, and vehicles across the globe. With over 4 million registered developers, Mapbox stands out for its flexibility, security, and commitment to privacy compliance. Companies utilize our applications, data, SDKs, and APIs to craft tailored, immersive experiences that captivate their users.What We DoOur 3D graphics team leverages engineering expertise and creativity to expand the limits of interactive maps and enhance the daily use of location technologies. We engage with cutting-edge, primarily open-source platforms for map interaction and visualization, reaching millions of users worldwide.As AI technologies increasingly integrate into engineering processes, we seek engineers who can thoughtfully weave AI into design, development, and strategic decision-making. Our interview process will include discussions on how you incorporate AI into your engineering practices.Your ResponsibilitiesContribute to the world’s leading vector map rendering engines.Engage in the complete graphics pipeline, from data processing to rendering.Utilize modern C++14/17 and TypeScript codebases, adhering to best practices in software engineering.Tackle intriguing challenges in graphics programming, algorithms, and architectural design.Enhance project performance, stability, maintainability, and simplicity.Experiment with innovative visualization techniques and rapid graphics and geometry algorithms, positively impacting millions of users in consumer mapping applications.Desired TraitsA strong sense of curiosity and enthusiasm for solving complex technical challenges in geo and data visualization using emerging technologies.Empathy and kindness, with a willingness to learn from diverse perspectives and assist others in their growth.Excellent communication skills, with the ability to collaborate effectively across distributed teams.Proficiency in C++, JavaScript/TypeScript, algorithms, and performance optimization.Strong background in graphics programming (OpenGL, Metal, Vulkan, WebGL, WebGPU).