Principal Rendering Engineer

Harmattan AI

ABOUT US Harmattan AI is a next-generation defense prime building autonomous and scalable defense systems. Following the close of a $200M Series B, valuing the company at $1.4 billion, we are expanding our teams and capabilities to deliver mission-critical systems to allied forces. Our work is guided by clear values: building technologies with real-world impact, pursuing excellence in everything we do, setting ambitious goals, and taking on the hardest technical challenges. We operate in a demanding environment where rigor, ownership, and execution are expected. ABOUT THE ROLE As Harmattan AI develops advanced autonomous drone systems and payloads for defense applications, our engineering teams are scaling rapidly. To support this growth, our internal Tooling team needs a dedicated Software Engineer - Visualization to build the software infrastructure that accelerates development, testing, and validation. In this role, you will design and deliver the critical internal tools that allow our Guidance, Navigation, and Control (GNC), Machine Learning (ML), Embedded Software, and Validation teams to see, explore, and make sense of massive datasets—including telemetry, sensor data, simulation outputs, flight paths, and complex 3D scenes. You will have high ownership and direct mission impact, building infrastructure used daily across all technical teams. RESPONSIBILITIES * Design & Development: Design, develop, and maintain high-performance visualization tools, telemetry dashboards, data plotting software, and 3D scene viewers from scratch. * Architecture & API Design: Define clean, sustainable solutions (architecture, internal APIs, and intuitive user interfaces) responding to specific technical needs from engineering teams. * Pipeline Integration: Ensure all custom visualization tools integrate seamlessly into the company's automated CI/CD and data processing pipelines. * Performance Optimization: Analyze and continuously optimize the performance, rendering, and responsiveness of visualization tools handling real-world data at scale. * Cross-Functional Collaboration: Partner directly with user teams (GNC, ML, Embedded, Validation) to translate operational feedback and field requirements into technical specifications. * Quality Assurance: Write clean, robust code, contribute to tests, improve automated quality evaluations, and document workflows via tutorials. * Technical Standards: Set technical standards for internal software tools and mentor junior developers as the organization scales. CANDIDATE REQUIREMENTS TECHNICAL COMPETENCIES & EXPERIENCE * Professional Experience: Minimum of 3 years of professional software engineering experience, ideally with a background in robotics, aerospace, or building specialized data visualization platforms. * Core Languages: Strong, production-grade software development skills in C++ and Python. * UI Frameworks: Solid experience building desktop user interfaces or visualization graphics using the Qt framework. * Graphics & Visualization: Proven experience creating data or 3D visualization tools, custom charting libraries, dashboards, or 3D scene renderers. * Development Environment: Complete comfort in a Linux development environment combined with cross-platform build knowledge using containerization tools like Docker. PREFERRED QUALIFICATIONS (NICE TO HAVE) * Practical experience building applications or software libraries that interface directly with drones, autonomous payloads, or robotic architectures. * A baseline understanding of a drone's embedded software stacks (e.g., GNC logic loops, gimbal control, video streams, or embedded hardware). * Familiarity with CI/CD automation and orchestration tools. EDUCATIONAL BACKGROUND * Ideally an MSc or BSc in Computer Science, Software Engineering, Robotics, or a similar technical field. Equivalent professional engineering experience is equally valued. LEADERSHIP & PROFESSIONAL ATTRIBUTES * Complex Project Management: Avid learner with a demonstrated capacity to handle large-scale, complex projects from initial scoping and prioritization through rapid, iterative deployments—offering innovative solutions and leading teams to deliver outstanding results. * User Empathy & Design Sensitivity: Empathetic to the pain points of internal user teams; sensitive to software design, ergonomic efficiency, and clean UX. * Adaptability & Mobility: Thrives under pressure in a fast-paced, highly dynamic environment; displays strong curiosity and a healthy “no-task-is-too-small” mentality to maintain continuous deployment workflows. * Communication & Influence: Excellent written and verbal communication skills, capable of leading and collaborating with diverse principals—from junior team members to senior executives and group leaders. * Commitment: 100% dedication to Harmattan AI’s mission, vision, and ambitious growth plans, ready to go the extra mile to ensure operational excellence. We look forward to hearing how you can help shape the future of autonomous defense systems at Harmattan AI.

Supercell

WE ARE LOOKING FOR A SENIOR TOOLS PROGRAMMER TO JOIN OUR NEWLY FORMED ART PIPELINES TEAM, SHAPING THE TECHNOLOGY THAT SUPPORTS OUR ARTISTS ACROSS GAME TEAMS. The Art Pipelines team is a small, growing group building art pipelines and pipeline tools that fit the way our artists work. The work is a mix of design and architecture on systems we’re building from the ground up, plus the day-to-day feature delivery, bug fixes, and tickets that come with running a tool team. You’ll have meaningful input on how these tools are structured, how they ship, and how they grow. We expect you to care about the people using the tools as much as the code that runs them. If this sounds like you, and you’re interested in finding out if Supercell would be a great fit for you, hit that apply button. WHAT YOU'LL BE DOING * Develop and ship features in art pipeline tools used by artists across our game teams. * Contribute to architecture and technical decisions on subsystems you build, from data models and file formats to UI and rendering. * Work directly with artists to understand their workflow pain, and turn it into tools that make their day shorter and their work better. * Ship cross-platform on Windows and macOS, and make the experience feel native and solid on both. * Collaborate with engine and game teams on the pipeline boundary. WHAT YOU HAVE * Strong professional experience with C++ in production environments. * Proven experience building desktop user interface, and a clear sense of how to structure a non-trivial user interface. * Experience shipping cross-platform desktop software on Windows and macOS, and you know where the pain points are. * Solid understanding of graphics fundamentals: coordinate systems, transforms, blending, rendering pipelines, animation. * Experience working in a codebase that others depend on: clean APIs, good documentation hygiene, code review discipline. * AI development tools (Copilot, Cursor, Claude, etc.) are part of your daily workflow. We treat them as productivity tools, not shortcuts to avoid. * Ability to communicate clearly with both technical and non-technical people. * Driven, focused, and willing to see projects through delivery. * A genuine desire to help others produce their best work. WOULD BE NICE IF YOU ALSO HAVE * Understanding of art pipelines and the day-to-day processes artists work through: what gets exported, where things break, what slows people down. * A background or hands-on experience in art, animation, or another creative discipline. * Background in animation systems: keyframing, interpolation, curve editors, timelines. * Prior experience building creative or content-creation tools, not just end-user applications. * Familiarity with immediate-mode UI frameworks (e.g. Dear ImGui) for in-engine tooling, debug overlays, and rapid prototyping. * Game engine or 3D engine development experience. WHY THIS ROLE MATTERS Our artists make content for live games played on a global scale. The tools they use every day shape what’s possible, and what’s painful. Success in this role means: * Tools that artists reach for first. * Shorter iteration loops between an idea and what ships in-game. * A codebase that your future teammates will gladly inherit. WHERE YOU'LL BE The team is based in our Helsinki office, which is the preferred location for this role as well. ––– 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 ARE LOOKING FOR AN EXPERIENCED ENGINE PROGRAMMER TO JOIN ONE OF OUR INTERNAL ENGINE TEAMS, WHICH IS RESPONSIBLE FOR THE CORE RUNTIME AND PLATFORM LAYER OF SUPERCELL’S IN-HOUSE GAME ENGINE. THE ENGINE TEAMS ARE INDEPENDENT TEAMS THAT MAINTAIN OUR INTERNAL TECH STACK AND WORK SEAMLESSLY WITH OUR GAME TEAMS TO REVOLUTIONIZE THE WAY WE DEVELOP GAMES AT SUPERCELL. You will be focused primarily on our multi-platform C++ game engine. You will be expected to iterate and integrate improvements to the engine and its subsystems while working alongside coders, designers and artists from game teams, as well as other core technical teams. We’re looking for someone like you, who ideally has years of experience, and knowledge acquired from the gaming industry. Whether you have broad experience in proprietary game engines or are a specialist in one area – we want to hear from you. To be successful in this role, you will need to be a proactive programmer who works directly with game teams to deliver world-class mobile games. If this sounds like you and you're interested in finding out if Supercell would be a great fit for you – hit that apply button. Read about the engine behind every Supercell game (and why you’ve never heard of it). WHAT YOU'LL BE DOING * Develop, maintain, and improve core engine systems used across all our games. * Design and evolve platform abstractions for iOS, Android, Windows, and macOS. * Work on runtime systems such as memory management, threading/job systems, asset loading, and performance-critical infrastructure. * Collaborate closely with game teams to identify bottlenecks and improve iteration speed, stability, and usability. * Improve developer workflows and tooling to make our engine a compelling alternative to off-the-shelf solutions. * Continuously modernize a large, long-lived codebase while supporting live games in production. * Work across team boundaries, ensuring clean integrations between core systems, rendering, and gameplay layers. WHAT YOU HAVE * Experience with in-house or proprietary game engines. * Strong professional experience with C++ in production environments. * Experience working with large, existing codebases, and the ability to improve them incrementally. * Solid understanding of core engine systems (e.g. memory, threading, asset management, runtime architecture). * Experience designing or working with cross-platform systems, especially for mobile (iOS/Android) and desktop (Windows/macOS). * Understanding of mobile performance characteristics (CPU, memory, threading, and platform constraints). * Ability to collaborate with both technical and non-technical team members. * Pragmatic problem-solving mindset and a focus on delivering real-world impact. * 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 ALSO NICE IF YOU HAVE * Familiarity with build systems and tooling (e.g. CMake, Gradle, Python, CI pipelines). * Experience improving developer workflows, iteration times, or debugging tools. * Experience with UI/tooling frameworks such as ImGui. * Experience in game server development and Java. * Experience from game console platforms. WHY THIS ROLE MATTERS Our engine has been developed over many years and powers multiple live games at global scale. We are actively evolving it to better support current and future titles. Success in this role means: * Making the engine more stable, faster, and easier to use. * Helping game teams ship and operate live games more effectively. * Contributing to a long-term effort to build world-class internal technology. WHERE YOU'LL BE The team is based in Helsinki, which is the preferred location for this role. ––– 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 P.S. Here's a video about what Supercell is about. Best enjoyed with salmiakki and rye bread!