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For Companies At a Glance
- Tasks: Solve complex problems by developing intelligent systems for enterprise customers.
- Company: Join Callosum, a pioneering company in heterogeneous intelligence.
- Benefits: Competitive salary, equity, private healthcare, and relocation support.
- Other info: Inclusive workplace with excellent tools and resources for your success.
- Why this job: Make a real impact by tackling challenging engineering problems with cutting-edge technology.
- Qualifications: Experience with modern LLMs and strong communication skills required.
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
Our customers run some of the most demanding inference workloads in the world. Their hardest problems are the ones that justify the existence of heterogeneous intelligence in the first place - workloads where frontier monolithic models are too slow, too expensive, or too imprecise to be the right answer. Finding those problems, understanding them deeply, and turning them into systems we can build is the work of this role. You will sit close to a small number of enterprise customers and become the engineer who understands their workloads better than anyone else at Callosum. You will translate what you learn into precise architectural problems for the team that designs new intelligent systems, prototype against real customer data and traffic, and stay with each system through the arc of integration, validation, and production rollout. The role is engineering-led, you will employ technical judgment to recognise what kind of system a problem needs, the rigour to prototype it well, and the experience to know when a solution generalises beyond the customer that asked for it. You will work closely with the engineers designing new intelligent systems, with the platform team that serves them, and directly with senior technical stakeholders on the customer side.
Who we are looking for
We're looking for engineers who do their best work close to real problems, with real users, under real constraints.
- Strong production engineering
- Substantial hands-on experience with modern LLMs - e.g., you have built non-trivial systems on top of them
- Strong communication skills to be the technical face of Callosum to a sophisticated customer.
- Comfort moving fast in unfamiliar domains: every customer is a new problem
What Stands Out
- Direct experience as a forward-deployed, solutions, or applied engineer at a company shipping serious technical product into enterprise environments.
- A track record of building things that started as one customer's problem and became part of a product.
- Domain depth in any vertical with heavy inference workloads - finance, code, search, healthcare, agentic platforms.
- Open-source work, research publications, or production systems whose scale and complexity you can speak to in detail.
What We Offer
- Competitive Salary, determined by skills and experience
- Equity & Ownership
- Private healthcare
- We offer Visa sponsorship and relocation benefits to hire the best in the world
- We work in person at our London office. You'll have the tools, space and setup to do your best work, and if you have specific needs, just tell us
- We're committed to building an inclusive workplace where everyone feels welcome, and believe in equal opportunities for all.
Forward Deployed Engineer in London employer: Callosum
Contact Detail:
Callosum Recruiting Team
StudySmarter Expert Advice 🤫
We think this is how you could land Forward Deployed Engineer in London
✨Tip Number 1
Network like a pro! Get out there and connect with people in the industry. Attend meetups, tech talks, or even online webinars. The more you engage, the better your chances of landing that dream role at Callosum.
✨Tip Number 2
Show off your skills! Create a portfolio showcasing your projects, especially those involving modern LLMs or complex systems. This will give us a clear picture of what you can bring to the table when tackling real-world problems.
✨Tip Number 3
Prepare for technical interviews by brushing up on your problem-solving skills. We love engineers who can think on their feet and tackle challenges head-on, so practice coding problems and system design scenarios relevant to our work.
✨Tip Number 4
Apply through our website! It’s the best way to ensure your application gets seen by the right people. Plus, it shows us you're genuinely interested in being part of the Callosum team and ready to dive into the exciting challenges we face.
We think you need these skills to ace Forward Deployed Engineer 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 hands-on experience with modern LLMs and any relevant projects you've worked on. We love seeing how your past experiences can translate into solving our customers' toughest problems.
Be Clear and Concise: While we appreciate detail, clarity is key! Make your points straightforward and easy to understand. This will help us see your thought process and technical judgement right from the start.
Apply Through Our Website: We encourage you to apply directly through our website. It’s the best way for us to receive your application and ensures you’re considered for the role. Plus, it shows you’re keen to join our team!
How to prepare for a job interview at Callosum
✨Know Your Tech Inside Out
Make sure you have a solid grasp of modern LLMs and how they work. Be ready to discuss your hands-on experience with them, as well as any systems you've built. This role is all about understanding complex problems, so being able to articulate your technical knowledge will set you apart.
✨Understand the Customer's Needs
Research the types of enterprise customers Callosum works with and their specific challenges. Think about how heterogeneous intelligence can solve their problems. Showing that you can translate customer needs into architectural solutions will demonstrate your value as a forward-deployed engineer.
✨Showcase Your Problem-Solving Skills
Prepare examples of past projects where you tackled tough engineering challenges. Highlight how you approached these problems, the solutions you implemented, and the impact they had. This will illustrate your ability to thrive under real constraints and deliver results.
✨Communicate Clearly and Confidently
As the technical face of Callosum, strong communication skills are essential. Practice explaining complex concepts in simple terms, and be prepared to engage in discussions with senior technical stakeholders. Confidence in your communication will help build trust and rapport during the interview.