At a Glance
- Tasks: Design and own Bazel rules, optimise CI performance, and create multi-language build pipelines.
- Company: Fractile, a fast-growing deep-tech company redefining AI with innovative hardware and software.
- Benefits: Hybrid work model, collaborative culture, and opportunities for professional growth.
- Other info: Dynamic environment with a focus on innovation and collaboration.
- Why this job: Join a pioneering team and shape the future of AI technology from the ground up.
- Qualifications: 5+ years in software engineering, strong Bazel experience, and CI/CD knowledge.
The predicted salary is between 50000 - 60000 £ per year.
Bristol or London Hybrid: Three days on-site. Fractile is building silicon, systems and software which will redefine the frontier of AI: running the world’s most advanced models at radically higher speed and lower cost. We have an exceptional team across hardware and software capable of bringing about this change, and we are growing fast to meet demand and deliver our product at scale. We’re looking for an engineer who wants to own Bazel at scale and build the tooling that powers every part of Fractile, from ML models to kernel drivers to hardware simulation.
This is a greenfield Bazel role in a fast-growing deep-tech company building a new class of ML hardware and software from first principles.
What you will work on:
- Designing and owning Bazel rules and extensions
- Scaling our monorepo as we grow across Python, C++, Rust, SystemVerilog and ML workloads
- Creating reproducible, multi-language build pipelines
- Optimising CI performance across large compute clusters
- Defining the developer experience for every engineer at Fractile
- Contributing upstream to Bazel rules we depend on
Why this role is unique?
- No legacy — you’re building the Bazel ecosystem from scratch
- Extreme variety — ML, compilers, kernel drivers, simulators, hardware verification
- High impact — your work becomes the backbone of the entire engineering organisation
- Deep collaboration with Simulation, Runtime, and Hardware teams
- Real ownership — you shape how Fractile builds software
What we are looking for:
- 5+ years in software or infrastructure engineering
- 3+ years with build systems
- Strong experience with Bazel
- Python scripting and automation
- Experience with CI/CD for large-scale products
- Bonus: ML pipelines, GitHub Actions, multi-language build systems, containers
About us:
- Founded in 2022, team of 100+ which is expanding rapidly
- Modern, open offices in London and Bristol
- Collaborative, problem-solving culture built on deep curiosity, entrepreneurial initiative and technical fluency
Export control and 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.
DevOps Engineer (Junior/Mid-Level) - Bazel Monorepo in London employer: Fractile
Fractile is an exceptional employer that fosters a collaborative and innovative work culture, where engineers are empowered to take ownership of their projects and contribute to groundbreaking advancements in AI technology. With modern offices in Bristol and London, employees enjoy a hybrid work model that promotes flexibility and work-life balance, alongside ample opportunities for professional growth in a fast-paced, deep-tech environment. Joining Fractile means being part of a dynamic team dedicated to redefining the future of machine learning hardware and software, with no legacy constraints and a focus on building impactful solutions from the ground up.
StudySmarter Expert Advice🤫
We think this is how you could land DevOps Engineer (Junior/Mid-Level) - Bazel Monorepo in London
✨Join Local Tech Meetups
Get out there and mingle with fellow developers by joining local tech meetups. It’s a fantastic way to meet people who might be working at Fractile or know someone who does. Plus, you can pick up some trendy tech skills and trends while you're at it!
✨Contribute to Open Source Projects
Show off your coding chops by jumping into open-source projects. Not only does this give you practical experience, but it also gets you noticed in the dev community. You'll create a killer portfolio that speaks volumes about your skills to Fractile.
✨Tap into Online Developer Communities
Don’t underestimate the power of online developer communities like GitHub, Stack Overflow, and even Reddit. Participate in discussions, share your projects, and build your visibility. We can often find opportunities through these channels that can lead to a full-time gig at companies like Fractile.
✨Explore Job Boards Specifically for Tech Roles
Keep your eyes peeled on job boards that focus on tech roles. Sites like TechCareers or Stack Overflow Jobs can often have listings for companies like Fractile that might not show up on broader job sites. Make it a habit to check these regularly, and don’t hesitate to apply directly through our website!
We think you need these skills to ace DevOps Engineer (Junior/Mid-Level) - Bazel Monorepo in London
Some tips for your application 🫡
Show off your coding skills:When applying for a software engineering role, it's super important to showcase your coding skills. Make sure your CV includes your tech stack, any relevant programming languages you’re comfortable with, and examples of projects you've worked on. If you have a GitHub profile, link it up! We love to see code in action.
Tailor your portfolio:For a full-time role, we’d expect to see some solid examples of your work in your portfolio. Make sure to include at least two or three projects that highlight your problem-solving skills and your ability to work with different technologies. Focus on the projects that are most relevant to the position at Fractile.
Craft a killer cover letter:Your cover letter is your chance to stand out—make it personal! Explain why you want to work at Fractile and how your skills align with the role. Show us your passion for software development. We dig enthusiastic candidates who understand the value of collaboration and continuous learning!
Be clear and concise:When it comes to writing your CV and cover letter, clarity is key. Avoid jargon that could confuse us and stick to simple, direct language. Highlight your achievements with quantifiable results where possible, and keep everything easy to read. A well-organised application goes a long way!
How to prepare for a job interview at Fractile
✨Brush Up on Your Coding Skills
For a full-time software engineering role, it's crucial that we stay sharp with our coding abilities. Expect technical questions that might involve solving problems on the spot or discussing algorithms. Practise on platforms like LeetCode or HackerRank to get comfortable with the types of questions that often come up.
✨Know Your Tools and Frameworks
Make sure we’re well-acquainted with the tools and technologies listed in the job description. Familiarise ourselves with any specific frameworks or programming languages mentioned. If Fractile uses React or Node.js, for instance, be ready to discuss how we’ve used them in previous projects or coursework.
✨Showcase Your Projects
Bring along a portfolio that highlights our best work. This could be code samples, GitHub repositories, or any side projects we’ve built. Make sure we can talk through our thought process for each project, especially the challenges we faced and how we solved them—this shows our problem-solving skills in action.
✨Prepare for Behavioural Questions
While technical skills are key, full-time positions also require cultural fit. Be ready to discuss our previous experiences and how we handle teamwork, conflict, and deadlines. Brush up on the STAR method—Situation, Task, Action, Result—to clearly articulate our past experiences when discussing how we've contributed to a team.
