IO Interactive is an independent video game development and publishing company with studios in Copenhagen, Malmö, Barcelona, Brighton and Istanbul. As the creative force behind some of the most talked-about multiplatform video games in the last decade, we are dedicated to creating unforgettable characters and experiences – all powered by our award-winning proprietary Glacier technology.
IO Interactive is looking for a skilled Programmer to join our Engine team, working at the intersection of Core Engine systems and Rendering. This role is idóneo for a systems-focused programmer who is curious about rendering, deeply interested in performance, and motivated by solving complex optimisation problems across CPU and GPU boundaries.
You will not be expected to be a traditional Rendering Programmer with a heavy focus on graphics theory or academic rendering techniques. Instead, you will work on the engine systems that enable rendering performance, scalability, and robustness across platforms.
What you will do
- Work on engine-level systems that directly impact rendering performance, scalability, and stability.
- Profile, analyse, and optimise performance across CPU and GPU, with a strong focus on real-world bottlenecks.
- Collaborate closely with Rendering Programmers to improve data flow, memory usage, threading, and execution models.
- Design and maintain low-level systems that support rendering features such as cloth, crowds, terrain, water, weather, and more.
- Optimise code paths, data layouts, and resource lifetimes across multiple platforms.
- Write robust, maintainable C++ code that will live across multiple projects and console generations.
- Debug complex, cross-system issues where rendering, engine infrastructure, and platform constraints meet.
Who you are:
- Strong C++ programmer with solid experience in engine or systems-level development.
- Comfortable working close to the hardware, with a good understanding of CPU and GPU interaction.
- Experienced with performance profiling, optimisation, and debugging in large-scale codebases.
- Familiar with rendering concepts and graphics pipelines, but more interested in how systems support rendering than in writing shaders all day.
- Strong grasp of algorithms, data structures, memory management, and multithreading.
- Experience working on at least one AAA title, ideally on engine, core, or performance-critical systems.
Who we are:
IO Interactive is an independent videogame development and publishing company with studios in Copenhagen, Malmö, Barcelona, Istanbul and Brighton. As the creative force behind some of the most talked-about multiplatform video games in the last decade, we are committed to creating unforgettable characters and experiences – all powered by our award-winning, proprietary Glacier technology.
IOI is a studio that values in-person collaboration. Being together helps us focus our collective energy on our immediate goals. For us, being both in-office as well as connected across our studios helps us integrate our teams faster, strengthen relationships, and improve knowledge-sharing. We believe that the more time we spend together, the more quality and progress we achieve for our games and players.
We know that to achieve those goals, we need courage, talented people and a great working environment – and we do our utmost to have all of that. Across our multiple studios, we’re working on several projects. Crucially though, we’re all one team. We value the work and impact that each person brings to the table and we actively encourage new ideas, whilst listening to your insights along the way.
We have a dedicated team of People Managers, who look after you as an individual and as an employee. With more than 40 nationalities, we know that everyone is different and we are proud to have a reputation for being a friendly workplace with highly-talent people.
Learn more about our Glacier engine.