Developer Experience Engineer
Not disclosed
Salary
Not disclosed by employer
£46,100
Going rate
Skilled Worker going rate
This role likely qualifies for a Skilled Worker visa
Our predicted code SOC 2129 (65% match) is an eligible occupation, with a going rate of £46,100, and Fractile Ltd is a licensed sponsor. That is our reading of the published rules. Whether they issue a Certificate of Sponsorship is still their call.
About the role
Developer Experience Engineer
Fractile · London or Bristol · Full-time · Hybrid
About Fractile
Fractile is building silicon, systems, and software that redefine the frontier of AI — running the world's largest language models at radically higher speed and lower cost. Founded in 2022, our 100+ person team spans hardware and software, and we're growing fast.
But revolutionary hardware only matters if developers can get their models running on it quickly and predictably. That's where you come in.
The Role
We're looking for Developer Experience Engineers to design and build the tooling and workflows that companies will use to optimise their large language models on Fractile's next-generation inference hardware.
This is a role that sits at the intersection of deep systems knowledge and genuine empathy for developers. You'll shape how the outside world experiences Fractile — from a customer's first quickstart guide through to advanced performance profiling. You'll also be the voice of that external developer inside the company, turning real deployment pain into roadmap priorities.
You'll work in a tight hardware-software co-design loop alongside ML compiler, runtime, systems software, and silicon engineers — influencing APIs and abstractions before they're set in stone.
What You'll Do
- Design and build the tools customers use to run, optimise, and monitor large language models on Fractile hardware
- Build interfaces to diagnostic, profiling, and observability tools that help developers understand performance, debug issues, and optimise deployments
- Write documentation, quickstarts, reference examples, and tutorials that define a developer's first and lasting impression of our platform
- Act as the voice of the external developer inside Fractile — translating real deployment pain into roadmap priorities
What We're Looking For
We care about depth of knowledge, empathy for developers, and a genuine drive to make complex things feel simple. You'll be a strong fit if you have:
- Strong software engineering fundamentals and experience building developer-facing tooling, SDKs, APIs, or platforms that other engineers depend on.
- Experience developing for inference hardware and/or GPUs (e.g. one year or more using CUDA or ROCm).
- A good understanding of modern ML workloads and the practical challenges of deploying large language models to production.
- An instinct for reducing the number of steps, surprises, and rough edges between a user and a working results.
Bonus Points
These aren't requirements, but they'd make you stand out:
- Experience with inference serving stacks (vLLM, SGLang, TensorRT-LLM, Triton).
- A track record of contributing to or maintaining open source developer tools and ML ecosystem projects
- Experience writing technical documentation and developer education content.
How We Work
- Ownership and autonomy — you'll have real agency to drive your work forward
- Rapid iteration — we work directly with leadership to move from idea to product on fast-moving timelines
- Full-stack collaboration — hardware, software, silicon, and modelling teams work closely together
- Hybrid working: 3 days onsite (London or Bristol), 2 days remote — we're open to discussing flexibility where it works for the role
- A team-first mindset — the best idea gets shipped, regardless of where it comes from
Why Fractile
- Shape how the world's developers experience next-generation AI hardware
Export Control & Security Clearance
Certain roles may involve working on technologies subject to export restrictions. Applicants may be required to undergo additional eligibility checks to ensure compliance with applicable law.
Fractile is committed to building a diverse and inclusive team. We welcome applications from people of all backgrounds and actively encourage candidates from underrepresented groups to apply.
Ready to apply? Send us your CV and a brief note on what excites you about this role.
This description is the source posting as it read when we added it. We are not affiliated with Fractile Ltd, so check their own site for the current details.
Where this offer sits in the market
SOC 2129 · UK · ONS ASHE 2025 · ~167k in sampleSimilar sponsored roles
See all jobsNo close matches live right now.
Browse more sponsored jobs at Fractile LtdAbout sponsorship for this role
Does this job guarantee visa sponsorship?
Not necessarily. Fractile Ltd holds a sponsor licence, but sponsorship for a specific hire is always the employer's decision. Be upfront in your application that you'll require it.
What salary is needed for this role to be eligible?
The offer must clear both the general threshold and the SOC 2129 going rate of £46,100. New-entrant and shortage discounts can lower it.