At a Glance
- Tasks: Build innovative tooling for AI systems, enhancing developer experience and performance insights.
- Company: Join Callosum, a pioneering company in intelligent systems and heterogeneous AI.
- Benefits: Competitive salary, flexible work options, and opportunities for professional growth.
- Other info: Dynamic team environment focused on groundbreaking technology and collaboration.
- Why this job: Tackle complex challenges and shape the future of AI infrastructure.
- Qualifications: Strong software engineering skills and experience with profiling tools.
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
- Convert 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 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 every member's contributions are valued, making us an exceptional employer for those passionate about advancing AI technology.
StudySmarter Expert Advice🤫
We think this is how you could land Systems Tooling & Infrastructure - Member of Technical Staff
✨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 refer you directly to hiring managers.
✨Tip Number 2
Show off your skills! Create a portfolio or GitHub repository showcasing your projects and contributions. This is your chance to demonstrate your expertise in profiling, tracing, and tooling – make it shine!
✨Tip Number 3
Prepare for interviews by brushing up on your technical knowledge and problem-solving skills. Practice coding challenges and be ready to discuss your experience with observability stacks and developer tooling. Confidence is key!
✨Tip Number 4
Don’t forget to apply through our website! We love seeing candidates who are genuinely interested in joining us at Callosum. Tailor your application to highlight how your skills align with our mission of building cutting-edge infrastructure.
We think you need these skills to ace Systems Tooling & Infrastructure - Member of Technical Staff
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 Application:Make sure to customise your application to highlight your relevant experience and skills. We love seeing how your background aligns with our mission of building innovative infrastructure for heterogeneous intelligence.
Be Clear and Concise:Keep your writing straightforward and to the point. We appreciate clarity, so avoid jargon unless it's necessary. Remember, we want to understand your thought process and how you approach problem-solving.
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 shows you’re keen on joining our team!
How to prepare for a job interview at Callosum
✨Know Your Stuff
Make sure you brush up on your software engineering fundamentals. Understand clean APIs, error handling, and documentation. Familiarity with profiling and tracing systems is crucial, so be ready to discuss tools like perf or Nsight and how you've used them in past projects.
✨Showcase Your Problem-Solving Skills
Since the role involves tackling complex challenges, prepare to share examples of how you've approached tough problems in the past. Think about specific instances where you turned overwhelming data into actionable insights, especially in relation to observability stacks like Prometheus or Grafana.
✨Get Hands-On with Tools
Familiarise yourself with the tools mentioned in the job description. If you can, try to build a small project that uses profiling and tracing systems or create a simple CLI tool. This hands-on experience will not only boost your confidence but also give you concrete examples to discuss during the interview.
✨Ask Insightful Questions
Prepare some thoughtful questions about the company's vision for heterogeneous intelligence and how they see the role evolving. This shows your genuine interest in the position and helps you gauge if the company aligns with your career goals. Plus, it’s a great way to demonstrate your enthusiasm for solving hard problems!
