Senior Server Engineer, Brawl Stars

Supercell

ARE YOU EXCITED TO WORK WITH EVERY SUPERCELL GAME TEAM AND OWN A PIECE OF CRITICAL GAME TECHNOLOGY? ARE YOU READY FOR THE CHALLENGE OF BUILDING A PLATFORM CAPABLE OF HANDLING HUNDREDS OF MILLIONS OF ACTIVE PLAYERS? We are looking for an experienced Senior Server Engineer to join Supercell’s Central Tech organization in Helsinki. As a Senior Server Engineer, you will collaborate closely with all of Supercell’s game teams, developing critical server-side technology that enables reliable, scalable, and efficient game backends and Live Operations (LiveOps). The systems you work on directly impact hundreds of millions of monthly players, making stability, performance, and operability essential. Our core mission: enable game teams to focus on creating great player experiences by providing robust, scalable and easy-to-use server technology. Game development at Supercell is a team sport. We value humility, pragmatism, and open collaboration. Central Tech engineers work seamlessly with game teams and with each other, share learnings across teams, and are comfortable discussing both successes and failures. Read about the engine behind every Supercell game (and why you’ve never heard of it). WHAT YOU’LL BE DOING * Design, implement, and evolve highly scalable backend solutions for our games. * Take technical ownership of critical parts of central game server technology, from development to production. * Collaborate closely with game teams to understand their needs and help them use central systems effectively. * Troubleshoot production and customer issues and help coordinate long-term solutions. * Participate in a rotating on-call duty, providing first-line support for production environments. * Contribute to best practices around scalability, reliability, availability, security, and operability. * Improve operational procedures for our infrastructure and services. * Share knowledge, learnings, and improvements across Central Tech teams. WHAT YOU HAVE * Strong experience in server-side Java, including concurrency and distributed systems. * Strong communication and collaboration skills, especially when working with multiple teams. * Proven ability to design and implement high-performance, scalable distributed systems. * Experience with cloud platforms (e.g. AWS or GCP), automation, and Infrastructure as Code. * Understanding of operating live systems with large user volumes. * Highly autonomous and proactive, with a strong sense of ownership. * Humble, pragmatic mindset and a respectful attitude toward others and their work. * Passion for games and building technology that enables others to succeed. * A self-starter approach to use AI: you've found ways to use it in your day-to-day work, you experiment, figure things out and bring the same energy to every new challenge. WOULD BE NICE IF YOU ALSO HAVE * Experience or solid understanding of large-scale containerized environments (e.g. EKS, ECS, Fargate, GKE). * Experience with high-throughput live systems. * Strong SQL and database design experience. * Experience with Linux, shell scripting, and automation. * Knowledge of networking, security, and cloud security practices. * Experience with Terraform or similar IaC tools. * Familiarity with ZooKeeper or similar coordination systems. * Prior game development experience. ––– That's it about the role! Below, we've gathered some things we feel are important for you to know. Totally optional, but a highly recommended read. Once you're ready to apply, just send us your application through the form on the bottom of the page. ––– ABOUT SUPERCELL Supercell is a games company from Helsinki, Finland, with offices also in San Francisco, Seoul, Shanghai, and London. You might know us as the makers of Hay Day, Clash of Clans, Boom Beach, Clash Royale, and Brawl Stars. Our mission is to create great games that as many people as possible play for years and that are remembered forever. So, how do we make great games? By putting together the best teams and giving them the freedom and independence to succeed. And by taking risks, failing, sharing learnings, and killing lots of projects. HEY, YOU MIGHT LOVE IT HERE! Independent cells and trust are at the core of our culture. But it takes more than that to make great games. We take good care of our people, providing them with the compensation, work environment, and resources they need to succeed while having fun along the way. YOU ARE NOT YOUR JOB TITLE ™ Here, you won’t need to focus on chasing titles or climbing ladders. Internally, our job titles don’t include prefixes like Senior, Junior, Principal, or Director. Recognition isn’t tied to your title, as it doesn't define the impact you can have around here. BENEFITS AND COMPENSATION Luring you in with glitter, glamour, and gems isn't what we're about. We want you to enjoy your time here fully, so we structure our compensation and benefits with that in mind. It starts with perceiving you as a human being, not a resource. RELOCATION? YES! No matter where you’re moving from, our dedicated mobility team and partners will support you throughout your move. We’ll ensure the process is as smooth as possible for you and anyone joining you – whether they’re family members of the human or animal kind! NOT SURE IF YOU SHOULD APPLY? Many candidates with great skills and experience second-guess themselves. The bar is high, but if this role excites you, apply! We’re here to help you succeed. Also, we're happy to learn about any specific accommodations you may need to fully engage in our recruitment process. Wishing you all the best, The Supercell Recruitment team

Supercell

BRAWL STARS TEAM IS STACKED WITH GREAT PROGRAMMERS WHO WANT TO HIRE MORE GREAT PROGRAMMERS TO CALL THEM "MY NEW FAVORITE TEAM MEMBER". WE CALL UPON YOU TO JOIN THE QUEST OF ADDING A LITTLE BIT OF FUN TO THE DAILY LIVES OF MILLIONS OF PLAYERS. At Supercell, client programmers are at the heart of the team, working together with designers, artists, and other engineers to craft fresh, new experiences for our players. Implementing features is of course your bread and butter, but you have a keen eye for the little details that make the experience outstanding for all the Brawl Stars fans. You're someone who likes to decide what to do with the people you work with rather than being told what to do from above and drive tremendous impact with a small team. Together, you can take a feature from a vague idea on a post-it to a fully working and polished implementation. Our game programmers are mostly generalists, so you can work on lots of different areas of the game. It’s important that you take pride in your work and know what it means to take responsibility and deliver quality and fun to players. We offer you a chance to join a team of professionals where talent feeds talent. We do not believe in bureaucracy or convoluted processes. Game development is a team sport, so we work together to achieve the best results. We trust each other’s skills and value each other’s work. All of us are driven by the amazing opportunity to make a game played by millions of players better and better. If this sounds exciting to you, then you might just be the person we are looking for! WHAT YOU'LL BE DOING * Craft high-quality features end-to-end, from a rough idea to polished code running smoothly for millions of players * Collaborate closely with designers, artists and other engineers to make features feel right, not just function right * Work across different areas of the game, wherever impact is needed * Write robust code that stands up to the demands of a massive, ever-evolving live game * Take initiative to improve shared tools, workflows, and the codebase itself WHAT YOU HAVE * Strong, professional experience using C++ * Implemented and shipped major game features/game(s) * Equally capable building on top of existing code as creating new systems * A problem solver who thinks about how systems fit together, not just the feature at hand * Sharp communicator who works naturally with designers, artists, and other disciplines * Comfortable with ambiguity and high autonomy in a fast-paced environment * Passion for games, technology, with a forward-thinking approach * Be passionate about the game and contribute design ideas to help it be better * A self-starter approach to use AI: you've found ways to use it in your day-to-day work, you experiment, figure things out and bring the same energy to every new challenge. WOULD BE NICE IF YOU ALSO HAVE * Experience creating or working on a live-service title * Experience with real-time, multiplayer games * Familiarity with server-side development and Java * Ability to deeply optimize code for performance * Deep experience in any of the following areas: mobile UI, liveops events, progression systems, social features * Experience mentoring other programmers or driving technical initiatives * An inkling of humour WHERE YOU'LL BE This role is based in our Helsinki Studio. ––– That's it about the role! Below, we've gathered some things we feel are important for you to know. Totally optional, but a highly recommended read. Once you're ready to apply, just send us your application through the form on the bottom of the page. ––– ABOUT SUPERCELL Supercell is a games company from Helsinki, Finland, with offices also in San Francisco, Seoul, Shanghai, and London. You might know us as the makers of Hay Day, Clash of Clans, Boom Beach, Clash Royale, and Brawl Stars. Our mission is to create great games that as many people as possible play for years and that are remembered forever. So, how do we make great games? By putting together the best teams and giving them the freedom and independence to succeed. And by taking risks, failing, sharing learnings, and killing lots of projects. HEY, YOU MIGHT LOVE IT HERE! Independent cells and trust are at the core of our culture. But it takes more than that to make great games. We take good care of our people, providing them with the compensation, work environment, and resources they need to succeed while having fun along the way. YOU ARE NOT YOUR JOB TITLE ™ Here, you won’t need to focus on chasing titles or climbing ladders. Internally, our job titles don’t include prefixes like Senior, Junior, Principal, or Director. Recognition isn’t tied to your title, as it doesn't define the impact you can have around here. BENEFITS AND COMPENSATION Luring you in with glitter, glamour, and gems isn't what we're about. We want you to enjoy your time here fully, so we structure our compensation and benefits with that in mind. It starts with perceiving you as a human being, not a resource. RELOCATION? YES! No matter where you’re moving from, our dedicated mobility team and partners will support you throughout your move. We’ll ensure the process is as smooth as possible for you and anyone joining you – whether they’re family members of the human or animal kind! NOT SURE IF YOU SHOULD APPLY? Many candidates with great skills and experience second-guess themselves. The bar is high, but if this role excites you, apply! We’re here to help you succeed. Also, we're happy to learn about any specific accommodations you may need to fully engage in our recruitment process. Wishing you all the best, The Supercell Recruitment team

Supercell

WE’RE LOOKING FOR A SENIOR MACHINE LEARNING ENGINEER WHO CAN BUILD LARGE-SCALE SYSTEMS AND TURN THEM INTO IMPACTFUL SOLUTIONS FOR PLAYERS AND THE BUSINESS. IF DESIGNING REAL-TIME, PLAYER-FACING USE CASES WITH MEASURABLE IMPACT AT MASSIVE SCALE SOUNDS EXCITING, THIS COULD BE A GREAT FIT. Supercell is rapidly scaling its machine learning capabilities. We are building a scalable ML platform and bringing personalized player experiences into production at massive scale. Our ambition is to empower game teams to deliver billions of automated, data-driven decisions across the full player journey every day. You’ll join a small, high-impact team of Data Science and Machine Learning experts, working closely with game teams, LiveOps, Data, and Analytics. You’ll play a key role in shaping Supercell’s ML platform, delivering impactful solutions, and enabling teams to build and scale ML-driven features. Your work will span the full ML lifecycle from business problem formulation and data collection to modeling and deployment real-time decisioning, helping turn ideas into production systems that directly impact players. You’ll set strong engineering practices, share your knowledge, and help shape how we use ML to optimize player experiences. WHAT YOU'LL BE DOING * Understand our games, players, and business goals to identify where ML can deliver meaningful impact, and build strong relationships across teams. * Design and build end-to-end, real-time and event-driven ML systems from data to low-latency serving, enabling context-aware player experiences. * Develop and deploy ML models and decision systems that shape personalized player experiences across the full player journey. * Build scalable ML systems and reusable platform capabilities, enabling game teams to adopt ML through tools, pipelines, and APIs. * Balance speed, robustness, experimentation, and standardization while continuously reducing time from idea to experiment to production. * Operate, monitor, and optimize production ML systems to ensure world-class performance, reliability, and scalability. * Champion modern MLOps practices through mentorship, code and design reviews, documentation, and by guiding game teams in adopting ML workflows. * Shape ML strategy and ensure it drives real player and business impact. * Continue to level up Supercell AI maturity throught knowledge sharing and adoption of new tools. WHAT YOU HAVE * Deep expertise in Machine Learning with a strong track record of taking ML systems into production. * Hands-on experience deploying ML models at large scale, operating in high-traffic, low-latency production environments. * Strong software, data, and ML engineering skills, with the ability to design, build, and maintain robust end-to-end ML pipelines. * Experience leveraging modern AI-assisted development tools to improve productivity and accelerate iteration speed. * Proven ability to collaborate with other developers and AI agents, as well as independently drive ML projects from idea to production. * Excellent problem-solving ability, with strong analytical thinking and attention to detail. * Clear and effective communication skills, able to translate complex technical concepts for both technical and non-technical audiences. * Positive, proactive, and “can-do” mindset, with a willingness to dive deep and take ownership. * Passion for games. Previous industry experience is a strong plus. WHAT YOU'LL BE USING The following list is not intended as a strict set of requirements, but rather as examples of relevant technologies and areas of experience * Data & Processing: Python, Databricks, SQL, Spark, Redis, Tecton * Cloud: AWS, GCP * ML Frameworks: PyTorch, Ray, TensorFlow, ONNX * ML Training: Databricks Spark and Ray train + data * ML Serving: Ray serve, FastAPI, Triton inference * Infrastructure & Deployment: Docker, Kubernetes, Terraform, Kubeflow, GitHub Actions * Monitoring and tracking: Grafana, Prometheus, Weights and Biases, MLflow * AI development tools: Claude Code, Codex WHERE YOU'LL BE This role is based in our Helsinki office. We value a collaborative work environment and genuine human interactions. You will work very closely with our other Helsinki-based teams. If you are not local, our relocation team would be excited to help you with your move to Helsinki. We provide comprehensive support not only for you, but also for your family! ––– That's it about the role! Below, we've gathered some things we feel are important for you to know. Totally optional, but a highly recommended read. Once you're ready to apply, just send us your application through the form on the bottom of the page. ––– ABOUT SUPERCELL Supercell is a games company from Helsinki, Finland, with offices also in San Francisco, Seoul, Shanghai, and London. You might know us as the makers of Hay Day, Clash of Clans, Boom Beach, Clash Royale, and Brawl Stars. Our mission is to create great games that as many people as possible play for years and that are remembered forever. So, how do we make great games? By putting together the best teams and giving them the freedom and independence to succeed. And by taking risks, failing, sharing learnings, and killing lots of projects. HEY, YOU MIGHT LOVE IT HERE! Independent cells and trust are at the core of our culture. But it takes more than that to make great games. We take good care of our people, providing them with the compensation, work environment, and resources they need to succeed while having fun along the way. YOU ARE NOT YOUR JOB TITLE ™ Here, you won’t need to focus on chasing titles or climbing ladders. Internally, our job titles don’t include prefixes like Senior, Junior, Principal, or Director. Recognition isn’t tied to your title, as it doesn't define the impact you can have around here. BENEFITS AND COMPENSATION Luring you in with glitter, glamour, and gems isn't what we're about. We want you to enjoy your time here fully, so we structure our compensation and benefits with that in mind. It starts with perceiving you as a human being, not a resource. RELOCATION? YES! No matter where you’re moving from, our dedicated mobility team and partners will support you throughout your move. We’ll ensure the process is as smooth as possible for you and anyone joining you – whether they’re family members of the human or animal kind! NOT SURE IF YOU SHOULD APPLY? Many candidates with great skills and experience second-guess themselves. The bar is high, but if this role excites you, apply! We’re here to help you succeed. Also, we're happy to learn about any specific accommodations you may need to fully engage in our recruitment process. Wishing you all the best, The Supercell Recruitment team