At a Glance
- Tasks: Build autonomous systems that run real businesses and tackle unique engineering challenges.
- Company: Join Twin, an ambitious AI company builder based in Paris.
- Benefits: Enjoy a culture of ownership, speed, simplicity, and minimal meetings.
- Other info: Work with a small team of repeat founders and senior engineers.
- Why this job: Make a real impact by shipping code that reaches production immediately.
- Qualifications: Deep Rust experience, strong systems fundamentals, and a passion for building products.
The predicted salary is between 70000 - 90000 £ per year.
Twin is the AI company builder.
Anyone can describe a business goal in plain English — our platform designs, builds and operates AI agents that execute work end-to-end, using APIs when they exist and browsers when they don’t.
Our agents don’t just answer questions: they browse websites, call APIs, recover from failures, remember what matters, and become cheaper and more reliable over time.
Over 70,000 businesses already run real workflows on Twin every day.
We're a small team of repeat founders and senior engineers based in Paris.
We've raised a $10M Seed led by Local Globe and are building one of the most ambitious AI infrastructure companies in Europe.
Job Description
Most AI companies build copilots.
We’re building autonomous systems that run real businesses — and you’ll build the core systems behind them.
Your work will span the entire product, from low-level Rust infrastructure to user-facing experiences.
- Typical Projects Include
- Building ultra-low latency browser automation
- Designing reliable execution engines for long-running autonomous tasks
- Creating fault-tolerant distributed systems that recover automatically
- Building memory systems that improve over time
- Designing agent capabilities that thousands of users rely on every day
- Shipping product features from idea to production
You’ll own problems, not tickets.
Why join?
You’ll work on problems that don’t have existing solutions, ship code that reaches production immediately, and help define both the product and the architecture, alongside engineers who care deeply about quality without sacrificing speed.
Profile / Requirements
We’re looking for engineers who love building products as much as building systems. You likely have:
- Deep production Rust experience
- Experience building products in startups or open source
- Strong systems fundamentals (concurrency, networking, performance, distributed systems)
- Excellent product intuition, high ownership and a bias toward shipping
- Heavy usage of AI coding assistants
- Curiosity to work across the entire stack when necessary
You might be a great fit if you’ve built an open-source project people actually use, designed APIs developers enjoy, taken products from idea to production, talked directly to users, or optimised systems because performance mattered.
We care far more about what you’ve built than your years of experience.
- We’d love to see
- Open-source projects.
- Git Hub activity.
- Technical writing.
- Developer tools.
- Systems software.
- Products you’ve built from scratch.
Benefits
Our engineering culture: we optimise for ownership, speed and simplicity.
Everyone ships, everyone talks to users, everyone helps shape the product.
No feature factories, no handoffs, very few meetings.
AI-native engineering: we expect every engineer to use coding agents extensively, and we design our systems so they can be understood, extended and maintained by AI agents.
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Founding Engineer M/F/X - Build autonomous companies. in Cambridge employer: A Player
At Twin, we pride ourselves on being an exceptional employer, offering a dynamic work culture that fosters innovation and collaboration. Our small yet highly skilled team in Paris provides ample opportunities for personal and professional growth, allowing you to make a significant impact while working on cutting-edge AI systems. With a focus on building production-grade solutions, you'll enjoy the unique advantage of contributing to meaningful projects alongside experienced founders and engineers.
StudySmarter Expert Advice🤫
We think this is how you could land Founding Engineer M/F/X - Build autonomous companies. in Cambridge
✨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 A Player 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 A Player.
✨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 A Player.
✨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 A Player 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 M/F/X - Build autonomous companies. in Cambridge
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 A Player.
Craft a killer cover letter:Your cover letter is your chance to stand out—make it personal! Explain why you want to work at A Player 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 A Player
✨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 A Player 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.
