At a Glance
- Tasks: Design and build core infrastructure for AI reliability measurement and automated pipelines.
- Company: Isidor, a pioneering tech startup focused on trustworthy AI.
- Benefits: Competitive salary, equity, relocation package, and housing bonus.
- Other info: Join a fast-paced team backed by top investors and shape AI's future.
- Why this job: Make a real impact on the future of AI with cutting-edge technology.
- Qualifications: 1-5 years in backend systems, cloud infrastructure, and DevOps experience.
The predicted salary is between 60000 - 80000 £ per year.
About Us
Isidor is building the foundation of reliable AI. We believe that the next leap in AI depends as much on understanding and measuring model behaviour as it does on model size. To make AI trustworthy, we need systems that verify outputs, benchmark performance, and automate evaluation across billions of examples. Isidor was founded by engineers and researchers who care deeply about precision, transparency, and scientific rigor. We are a small, fast-moving team working directly with frontier AI labs and enterprise to make evaluation as measurable and reproducible as training itself.
The Role
As a Founding Engineer, you’ll own the architecture that defines how AI reliability is measured, from scalable backend systems to forward deployed pipelines and client-facing APIs. You will:
- Design and build the core infrastructure for data ingestion, evaluation, and benchmarking at scale
- Implement automated pipelines that measure model reliability, and evaluation metrics
- Lead DevOps and cloud automation
- Collaborate directly with AI research labs and enterprise clients
- Contribute to the company’s technical direction, culture, and engineering standards from first principles
What We’re Looking For
- 1-5 years building and scaling backend systems, strong experience with front end
- Understanding of cloud infrastructure (AWS, GCP)
- Expertise in DevOps, CI/CD, and performance tuning
- Experience building end-to-end systems from scratch
- Proven collaboration record with small teams, wearing many hats
Bonus points if you have:
- Built large-scale ML evaluation or annotation platforms
- Designed metrics pipelines for AI workflows
- Experience in AI research teams or startups to design technical infrastructure
- A strong appetite for a fast-paced environment requiring initiative and ownership
Why Join Us
Your work will directly influence the development of the next generation of AI models, giving you the opportunity to make an outsized impact on frontier research and implementation in enterprise.
Details
- Employment Type: Full time, in-office
- Location: London (in-person), with potential for relocation to San Francisco in H1 2026 (with visa support)
- Compensation: Competitive salary + equity
Benefits
- Relocation package
- Housing bonus (if within 3 miles of the office)
Please reach out with any questions to founders@isidor.ai
Founding Engineer in London employer: Isidor
Isidor is an exceptional employer for those looking to make a significant impact in the AI field. With a strong focus on precision and scientific rigor, our collaborative work culture fosters innovation and growth, allowing you to shape the future of AI reliability. Located in London, we offer competitive salaries, equity options, and unique benefits such as a relocation package and housing bonuses, ensuring that our team members are well-supported both personally and professionally.
StudySmarter Expert Advice🤫
We think this is how you could land Founding Engineer 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 Isidor 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 Isidor.
✨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 Isidor.
✨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 Isidor 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 Founding Engineer 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 Isidor.
Craft a killer cover letter:Your cover letter is your chance to stand out—make it personal! Explain why you want to work at Isidor 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 Isidor
✨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 Isidor 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.
