At a Glance
- Tasks: Build cutting-edge software for diverse AI accelerators and optimise performance across hardware.
- Company: Join Callosum, a pioneering Intelligent Systems company revolutionising AI infrastructure.
- Benefits: Competitive salary, flexible work options, and opportunities for professional growth.
- Other info: Dynamic team environment with a focus on collaboration and groundbreaking solutions.
- Why this job: Tackle complex challenges and make a real impact in the future of AI technology.
- Qualifications: Experience in kernel development and a passion for innovative accelerator technologies.
The predicted salary is between 60000 - 80000 € per year.
About Us
Artificial intelligence scaled on a bet - that bigger models, more identical chips, and more data would keep delivering. As problems grow more complex and the requirements of intelligence more diverse, that bet is breaking down. The next era belongs to heterogeneous intelligence: diverse models on diverse chips, each with distinct strengths, co-evolving into systems of capability unreachable by any single model or accelerator.
Callosum is the Intelligent Systems company. We built the infrastructure to make that possible. Our co-evolution engine optimises simultaneously across workflows, agents, and silicon. We launched in early 2026 showing orders of magnitude improvements in performance and a shift in the cost-performance frontier that no single chip or model provider can provide. We believe intelligence comes from the system, not the model. We are scientists and engineers solving what others consider impossible. If you thrive on hard problems, and are passionate and energised by the scale of the challenge, we'd love to hear from you.
About the Role
Callosum believes that orders of magnitude improvements in AI systems will come through application-aware orchestration across heterogeneous hardware. We are building that vision: infrastructure that treats the full landscape of compute as a unified, co-evolving system. Callosum is purposefully placed to be the first place to access and deploy new chips, expanding beyond GPUs to enable a system that works in harmony, greater than the sum of its parts.
This role sits at the foundation of Callosum’s stack, enabling the company to run AI workloads beyond the constraints of any single hardware vendor. You will build the low-level systems software - kernels, drivers, runtime tools - that make diverse and novel accelerators viable for real-world inference, surfacing the full strength of new silicon. This infrastructure is what enables us to turn a fragmented accelerator landscape into our platform; you will own the design decisions that directly influence performance and reliability.
What You'll Build
- Build and maintain kernels, device drivers, and firmware for heterogeneous accelerators
- Design and implement accelerator scheduling at the execution level — kernel launches, dataflow optimisation, and resource management across diverse hardware
- Optimise execution paths for latency, throughput, and resource utilisation across accelerator types
- Work closely with internal teams and hardware vendors to onboard new accelerator platforms
- Contribute to low-level runtime software that bridges our inference stack and the underlying hardware
What You Bring
- Demonstrable interest in a variety of accelerator microarchitectures
- Deep experience in kernel development, device driver authoring, or firmware engineering
- Familiarity with accelerator programming models (CUDA, ROCm, or vendor-specific SDKs)
- Experience with compiler infrastructure such as MLIR or LLVM
- Strong debugging skills in environments with limited tooling and incomplete documentation
Accelerator Systems Software - Member of Technical Staff in London employer: Callosum
At Callosum, we pride ourselves on being at the forefront of intelligent systems, fostering a culture of innovation and collaboration. Our team thrives in an environment that encourages tackling complex challenges, with ample opportunities for professional growth and development. Located in a vibrant tech hub, we offer competitive benefits and a unique chance to work with cutting-edge technology, making us an exceptional employer for those passionate about advancing AI infrastructure.
StudySmarter Expert Advice🤫
We think this is how you could land Accelerator Systems Software - Member of Technical Staff in London
✨Tip Number 1
Network like a pro! Reach out to folks in the industry, attend meetups, and connect with people on LinkedIn. You never know who might have the inside scoop on job openings or can put in a good word for you.
✨Tip Number 2
Show off your skills! Create a portfolio or GitHub repository showcasing your projects related to kernel development or device drivers. This gives potential employers a taste of what you can do and sets you apart from the crowd.
✨Tip Number 3
Prepare for technical interviews by brushing up on your debugging skills and understanding various accelerator microarchitectures. Practice coding challenges that focus on low-level systems software to get into the right mindset.
✨Tip Number 4
Don’t forget to apply through our website! We love seeing passionate candidates who resonate with our mission. Tailor your application to highlight your experience with heterogeneous systems and how you can contribute to our vision.
We think you need these skills to ace Accelerator Systems Software - Member of Technical Staff in London
Some tips for your application 🫡
Show Your Passion:When writing your application, let your enthusiasm for tackling complex problems shine through. We want to see that you're not just interested in the role, but that you're genuinely excited about the challenges we face at Callosum.
Tailor Your CV:Make sure your CV highlights relevant experience in kernel development, device drivers, or firmware engineering. We love seeing how your skills align with our needs, so don’t be shy about showcasing your expertise in accelerator programming models!
Be Clear and Concise:Keep your application straightforward and to the point. We appreciate clarity, so avoid jargon unless it’s necessary. Make it easy for us to see why you’re a great fit for the Accelerator Systems Software role.
Apply Through Our Website:We encourage you to submit your application directly through our website. It’s the best way for us to receive your details and ensures you’re considered for the role. Plus, it’s super easy!
How to prepare for a job interview at Callosum
✨Know Your Accelerators
Make sure you brush up on various accelerator microarchitectures before the interview. Familiarity with CUDA, ROCm, and vendor-specific SDKs will show that you're not just a one-trick pony. Dive deep into how these technologies work and be ready to discuss their strengths and weaknesses.
✨Showcase Your Kernel Development Skills
Prepare to talk about your experience in kernel development, device driver authoring, or firmware engineering. Bring examples of past projects where you optimised execution paths for latency and throughput. This is your chance to demonstrate your technical prowess and problem-solving skills.
✨Understand the Bigger Picture
Callosum is all about heterogeneous intelligence, so make sure you understand how diverse models and chips co-evolve. Be ready to discuss how you can contribute to building infrastructure that treats compute as a unified system. Show them you’re not just focused on the code but also on the impact it has on AI workloads.
✨Prepare for Technical Challenges
Expect to face some tough technical questions or even coding challenges during the interview. Brush up on debugging skills, especially in environments with limited tooling. Practising problem-solving under pressure will help you shine when it counts!
