At a Glance
- Tasks: Build innovative developer tools for complex AI systems and enhance performance tracking.
- Company: Join Callosum, a pioneering company in intelligent systems and heterogeneous computing.
- Benefits: Competitive salary, flexible work options, and opportunities for professional growth.
- Other info: Dynamic environment focused on collaboration and cutting-edge technology.
- Why this job: Be at the forefront of AI technology and solve challenging problems with a passionate team.
- Qualifications: Strong software engineering skills and experience with profiling and tracing systems.
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, evolved beyond GPUs. This role owns the developer experience of Callosum's stack, turning complex, low-level systems into something observable, debuggable, and usable by the rest of the team. You'll build the profiling, tracing, and developer tooling that defines how engineers interact with heterogeneous systems, enabling fast experimentation with new accelerators and complex inference workflows. You will own the abstractions, CLIs, and instrumentation that the engineering organisation is built on - primitives that don't yet exist for the next generation of compute infrastructure. As multi-stage and multi-agent workflows grow in complexity, your work is what keeps execution paths visible and tractable, ensuring the organisation can scale without losing insight or control.
What You’ll Build
- Extend profiling and tracing tooling for new accelerators, including collection, compression, and visualisation of performance data
- Develop CLI tools and automation wrappers that simplify common workflows - spinning up inference stacks, launching benchmarks, managing configurations
- Converting prototypes of internal tooling into high-performance, scalable, accessible commands
- Build tooling to support multi-agent serving workflows: request tracing across agent boundaries, pipeline visualisation, and debugging tools for complex inference DAGs
- Create internal libraries and abstractions that let other teams move faster without reinventing shared infrastructure
What You Bring
- Strong software engineering fundamentals: clean APIs, good error handling, sensible defaults, and clear documentation
- Experience with profiling and tracing systems (perf, Nsight, Tracy, or similar) and a good sense of how to make trace data actionable rather than overwhelming
- Familiarity with observability stacks (Prometheus, Grafana, OpenTelemetry, or equivalent) in varied infrastructure environments
- Comfortable across the stack - from low-level trace collection to dashboards and developer-facing CLI tools
Systems Tooling & Infrastructure - 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 supportive atmosphere where your contributions directly impact the future of AI infrastructure.
StudySmarter Expert Advice🤫
We think this is how you could land Systems Tooling & Infrastructure - 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. We all know that sometimes it’s not just what you know, but who you know that can help you land that dream job.
✨Tip Number 2
Prepare for those interviews by practising common technical questions and scenarios related to systems tooling and infrastructure. We recommend doing mock interviews with friends or using online platforms to get comfortable with the format.
✨Tip Number 3
Showcase your projects! Whether it's GitHub repos or personal projects, having something tangible to discuss can really set you apart. We love seeing how you’ve tackled complex problems and what tools you've built along the way.
✨Tip Number 4
Don’t forget to apply through our website! It’s the best way to ensure your application gets seen by the right people. Plus, we’re always on the lookout for passionate individuals who thrive on challenges like the ones we face at Callosum.
We think you need these skills to ace Systems Tooling & Infrastructure - Member of Technical Staff in London
Some tips for your application 🫡
Show Your Passion:When you're writing your application, let your enthusiasm for tackling complex problems shine through. We want to see that you're not just looking for a job, but that you're genuinely excited about the challenges we face at Callosum.
Tailor Your Experience:Make sure to highlight your relevant experience with profiling and tracing systems. We’re keen on seeing how your background aligns with our needs, so don’t hold back on showcasing your skills in observability stacks and developer tooling.
Be Clear and Concise:Keep your application straightforward and to the point. We appreciate clarity, so make sure your writing is easy to follow. Use bullet points if it helps convey your experience better – we love a well-structured application!
Apply Through Our Website:Don’t forget to submit your application through our website! It’s the best way for us to receive your details and ensures you’re considered for the role. Plus, it gives you a chance to explore more about what we do at Callosum.
How to prepare for a job interview at Callosum
✨Know Your Stuff
Make sure you brush up on your software engineering fundamentals. Be ready to discuss clean APIs, error handling, and documentation. Familiarity with profiling and tracing systems is a must, so be prepared to share your experiences with tools like perf or Nsight.
✨Showcase Your Problem-Solving Skills
Since this role involves tackling complex challenges, think of examples where you've solved tough problems in the past. Highlight your experience with observability stacks like Prometheus or Grafana, and how you've made trace data actionable.
✨Demonstrate Your Passion for Innovation
Callosum is all about pushing boundaries, so express your enthusiasm for working on cutting-edge technology. Share any projects or ideas you have that align with their vision of heterogeneous intelligence and multi-agent workflows.
✨Ask Insightful Questions
Prepare some thoughtful questions about the company's infrastructure and the role's responsibilities. This shows you're genuinely interested and helps you understand how you can contribute to their mission of creating a unified, co-evolving system.
