At a Glance
- Tasks: Join us in tackling the toughest AI infrastructure challenges and innovate with diverse technologies.
- Company: Callosum, a pioneering Intelligent Systems Company based in London.
- Benefits: Flexible work environment, competitive salary, and opportunities for professional growth.
- Other info: Dynamic and collaborative culture focused on solving real-world problems.
- Why this job: Be part of a team redefining AI with cutting-edge, heterogeneous systems.
- Qualifications: Experience in high-performance systems, distributed systems, or hardware development is a plus.
The predicted salary is between 80000 - 100000 £ per year.
About Us
The last era of AI scaled on a single bet: bigger models, more identical chips, more data. As problems grow more complex and the requirements of intelligence more diverse, that bet is breaking down. Real-world problems are heterogeneous: no single model or chip can solve them alone. The next era of AI requires heterogeneity at the infrastructure level - diverse models on diverse chips, each with distinct strengths, co-evolving into systems of capability that move the Pareto frontier of what is possible. That's what we are building.
Callosum is the Intelligent Systems Company. We started from questioning what actually creates intelligence. We believe there is no single answer, but rather a system-level solution. We co-evolve models, workflows, and silicon together to show that intelligence does not come from a single component, but it emerges from the diversity of co-optimised mechanisms working together and aware of each other. Heterogeneity will define the next era of compute, and is a principle that holds in biological, neuronal, and economic systems alike.
In early 2026 we launched with results showing orders of magnitude improvements in performance, and this is only the beginning. Agentic AI is the future of how intelligence is deployed: multi-step, long-horizon, and operating in changing environments. These systems are inherently heterogeneous, and can only be as powerful as the infrastructure that runs them.
We are engineers and scientists based in London, working together across the full depth of the stack. We are curious, intellectually honest, and building what doesn't exist yet. If you thrive on uncharted territory and are energised by the scale of the challenge, we'd love to hear from you.
Open Application
We're always looking for exceptional engineers who want to work on the hardest problems in AI infrastructure - bringing novel accelerators to life, building the systems that orchestrate them, and charting the new territories of what heterogeneous compute can do.
If you think you have unique skills to contribute, or have experience in any of the following, we'd love to hear from you:
- High-performance systems and low-level performance engineering
- Inference infrastructure, orchestration, or distributed systems
- Hardware bring-up, kernel development, or accelerator programming
- Simulation, modelling, or workload design
This is a general interest form rather than an application for a specific role. We prioritise active applicants for open positions, but we review all submissions on an ongoing basis and will reach out when we see a strong match. If you spot a specific role that excites you, we'd encourage you to apply directly.
Expression of Interest - Member of Technical Staff in London employer: Callosum
At Callosum, we pride ourselves on being at the forefront of AI innovation, fostering a collaborative and intellectually stimulating work environment in London. Our commitment to diversity in thought and technology not only drives our groundbreaking projects but also offers employees unparalleled opportunities for growth and development in a rapidly evolving field. Join us to be part of a team that values curiosity and creativity, where your contributions can shape the future of intelligent systems.
StudySmarter Expert Advice🤫
We think this is how you could land Expression of Interest - Member of Technical Staff in London
✨Join Developer Communities
Get involved in online developer communities like GitHub or Stack Overflow. We can showcase our skills by contributing to open-source projects – it’s a great way to network, learn, and possibly catch the eye of a recruiter while doing something we love!
✨Attend Coding Meetups and Hackathons
Check out local coding meetups and hackathons. These events are fantastic for meeting other developers and potential employers, plus they're a great way to get some hands-on experience and showcase our problem-solving skills in real-time.
✨Set Up a Public Portfolio
We should create a public portfolio or GitHub repository showcasing our projects and code. This not only demonstrates our technical skills but also gives employers a peek into our creative process and problem-solving abilities.
✨Utilise University Career Services
If we're fresh out of uni, let's not forget about our university’s career services! They often have tailored resources and connections in the software development field. Plus, internships can lead to entry-level roles – a true win-win!
We think you need these skills to ace Expression of Interest - Member of Technical Staff in London
Some tips for your application 🫡
Show Off Your Coding Skills:As this is an entry-level role in software engineering development, make sure to include your coding projects. Whether it's a cool school project, a personal website, or even contributions to open-source, it all counts! Link to your GitHub or any platforms you've showcased your code on – we want to see what you've got!
Tailor Your CV to Highlight Relevant Skills:Make your CV work for you by focusing on the programming languages and frameworks you've learned. If you've dabbled in JavaScript, Python, or any specific frameworks, be sure to include those. Plus, showcasing any relevant coursework or certifications can really help us get a clearer picture of your skill set.
Craft a Motivating Cover Letter:Since you're applying for an entry-level position, your cover letter is your chance to shine. Tell us why you’re passionate about software engineering and what excites you about working with Callosum. Highlight any internships or projects that shaped your interest in coding – it’s all about your motivation!
Use Your Network:Don't hesitate to mention any connections you might have to Callosum in your application. If you know someone who works there or have attended any events they hosted, slip that into your cover letter. It shows your genuine interest and can give you that extra edge in your application!
How to prepare for a job interview at Callosum
✨Know Your Code: Prepare for Technical Questions
For a role in software engineering, you can bet your Interviewer might throw some coding problems your way. Brush up on common algorithms and data structures, and practise coding on platforms like LeetCode or HackerRank. That way, you're ready to showcase your problem-solving skills confidently!
✨Portfolio Power: Show Off Your Projects
As an entry-level candidate, your portfolio is your secret weapon. Make sure you have a few solid projects on GitHub that demonstrate your coding skills and understanding of software development processes. Be ready to walk through your code and explain your thought process during the interview.
✨Familiarise Yourself with Agile and Development Tools
Understanding Agile methodologies can really set you apart from other entry-level candidates. Get familiar with tools like JIRA or Trello, and be prepared to discuss how you've used them in your projects or studies. This shows you're not just a coder but also a team player.
✨Demonstrate Your Learning Mindset
Since you're applying for an entry-level position, it's important to show your eagerness to learn. Be ready to discuss how you’ve tackled challenges in your studies or projects, what new skills you’ve picked up recently, and how you plan to continue developing in this fast-paced field.
