Senior Server Engineer, Central Tech

Supercell

WE ARE LOOKING FOR AN EXPERIENCED SERVER ENGINEER TO JOIN THE BRAWL STARS TEAM. AS A SERVER ENGINEER AT SUPERCELL, YOU'LL BE EMBEDDED IN A GAME TEAM, ACTIVELY CONTRIBUTING TO GAME DESIGN AND DIRECTION. YOU'LL BE RESPONSIBLE FOR MAKING SURE THAT OUR TENS OF MILLIONS OF DAILY PLAYERS GET THE BEST, MOST UNINTERRUPTED EXPERIENCE POSSIBLE. IN THE BRAWL STARS TEAM YOU WILL BE WORKING CLOSELY WITH CLIENT PROGRAMMERS AND OTHER TEAM MEMBERS TO DEVELOP NEW GAME FEATURES. Communication between server engineers in different game teams is absolutely vital to our success. Our server engineers frequently share learnings – both successes and failures – across game teams to make each team better. You must be humble, pragmatic and willing to admit and explain your mistakes. That way, the next time something goes wrong, we'll all be better prepared. If you have experience of developing live systems and using virtualized computing, and you understand what it means to support a system with large user volumes, in addition to being interested and excited about game feature development – you might just be the person we're looking for! WHAT YOU'LL BE DOING * Design, implementation, deployment and maintenance of highly-scalable and available backends for live games * Work closely with client programmers and other team members to develop new game features and actively contributing to game design discussions * Contribute to best-practices on reliability and availability * Troubleshoot and tune high-volume sharded database systems * Periodically offer round-the-clock first-line support of the production environments, as part of a rotating on-call duty WHAT YOU HAVE * Prior experience in game development, enthusiasm towards games and game feature development in general * Strong experience in server-side Java, including concurrency and distributed systems. * Good experience with Linux shell and scripting languages * Database design and implementation skills, and good SQL knowledge * Familiarity with Cloud computing * Hands-on experience with cloud platforms (AWS, GCP or Tencent Cloud), including automation and Infrastructure as Code (e.g. Terraform) * Knowledge of networking, security, and cloud security practices * Proven ability to design and implement high-performance, scalable distributed systems in a production setting * Ability to think clearly under pressure. We aim for minimal downtime in our games, and you are expected to be able to respond to and troubleshoot a wide range of issues in a production environment. * Being passionate and committed to tasks, and in general an autonomous person with high levels of initiative and energy * An open and respectful attitude towards others and their work * 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 * Familiarity with ZooKeeper or similar coordination / service discovery systems * A track record of improving operational procedures (deployments, observability, incident response, runbooks) for production services * Knowledge of network protocols and non-blocking IO * Previous working experience on high-throughput live systems is a big plus. If absent, then at least a solid appreciation of the challenges involved is expected. * Experience in server development without application servers 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

Supercell

WE'RE LOOKING FOR AN EXPERIENCED CLOUD ENGINEER TO JOIN THE CLOUD TEAM AT SUPERCELL. THE CLOUD TEAM PROVIDES THE FOUNDATION, EXPERTISE, AND SUPPORT THAT LETS EVERY SUPERCELL TEAM BUILD AND OPERATE SECURELY, EFFICIENTLY, AND AT SCALE ACROSS OUR MULTI-PROVIDER CLOUD ENVIRONMENT. OUR MISSION IS TO HELP EVERY TEAM USE THE CLOUD EFFECTIVELY AND SAFELY WITH MINIMAL OVERHEAD, WHILE MAKING SURE THERE ARE NO UNWELCOME SURPRISES. In this role you'll help us scale with the company's growth. As headcount and complexity increase, so does the demand on our cloud infrastructure. Rather than absorbing that linearly, we want to meet it with opinionated golden paths, automation, and self-service. You'll look several months ahead to spot scalability bottlenecks, technical debt, and emerging needs across the company, turning those into concrete technical direction and actions. You will design guardrails that minimise risk without being invasive, building paved roads that make the secure and efficient choice the easy choice. You’ll also ensure these paths work smoothly for both human developers and the AI tools or agents they use. You will operate with very high autonomy: keeping stakeholders and the team informed, and proactively deciding what makes the most sense for Supercell, so that teams can focus on creating great games. WHAT YOU'LL BE DOING * Build golden paths. Design and maintain opinionated, production-ready golden paths (think "hosting in 15 minutes") covering infrastructure, CI/CD, DNS, monitoring, auth, and storage. You’ll back these with reusable IaC templates and patterns that other developers build on. The goal is to enable teams and individuals to provision and run what they need themselves; we provide the paved roads, templates, and guardrails rather than owning and operating their infrastructure. * Automate high-risk operations into self-service. Turn manual operations (like account provisioning and deprovisioning, access grants and revocations, domain issuance) into deterministic, auditable pipelines triggered through self-service. Teams own their resources; we own the orchestration and guardrails, so changes run consistently and stay traceable across hundreds of accounts. * Own governance and security guardrails. Design and implement cloud governance using vendors’ native and customer tooling for Service Control Policies, WAF, IAM, SSO/Okta access and account governance. Pair preventative controls with detective layers that surface anomalies, configuration drift, and unexpected behaviour before they become problems. Minimise risk without getting in developers' way. * Enable safe AI-assisted development. Build guardrails for AI coding tools and "vibecoding" workflows (such as secrets handling, scoped permissions, sandboxing) and define how AI agents safely access cloud resources with agent identities and least-privilege IAM * Write opinionated docs for humans and agents. Create and maintain golden-path guidance, runbooks, and best practices that are equally consumable by developers and LLM agents (e.g. machine-readable/structured docs, MCP-style interfaces, and developer-portal content) * Raise Supercell’s game. Act as a force multiplier by mentoring other engineers, leading architectural reviews, and facilitating consensus during technical disagreements. Set the technical standards rather than just following them, and share learnings — including failures — openly through post-mortems. * Support FinOps. Help teams use the cloud cost-efficiently by surfacing cost-optimisation opportunities, improving cost visibility, and supporting accountability for usage across teams and projects. * Be a trusted partner to technical teams. Advise on cloud architecture, troubleshoot complex issues, and maintain close relationships across Supercell and with our cloud vendors. React quickly to emerging business and technical topics. WHAT YOU HAVE * Strong cloud computing and networking knowledge, with deep experience from at least one major cloud provider (e.g. AWS, Google Cloud) * Deep technical mastery across intersecting systems. You're the person others turn to for the hardest problems, but you also know when to route teams to the right internal expertise or external partners. * Solid grounding in cloud security and the common threat patterns in modern cloud environments * Hands-on experience with Terraform and GitHub Actions * Strong scripting and programming experience used to automate tasks and build custom tooling * Experience with cloud identity and access management, including IAM policies, roles, and permission boundaries across AWS and GCP. * Experience with application level identity, such as SSO, OIDC, and identity providers like Okta. * Familiarity with Internal Developer Platforms, including AI-assisted development tools, and a clear-eyed view of their security implications. * A track record of influence beyond your own work: mentoring engineers, leading architectural reviews, and setting technical standards * High autonomy. You identify and tackle problems before they're assigned, turn vague business pain points into technical roadmaps, and independently drive complex, ambiguous projects to completion. * Comfortable managing priorities and tight deadlines, even when dealing with incomplete data. * A humble, kind, and respectful attitude toward others and their work WOULD BE NICE IF YOU ALSO HAVE * Experience from multiple hyperscalers and a feel for how they compare * Experience securing AI agents, building MCP servers, or authoring agent-readable documentation * Experience with workflow automation tooling (e.g. n8n, Temporal) * Familiarity with Internal Developer Portals (e.g. Backstage) * Hands-on experience with FinOps tooling, reporting, and cost-optimisation experience * Experience with vendor management and direct collaboration with external partners * Enthusiasm for games 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