At a Glance
- Tasks: Develop and ship features for our AI coding agent, Junie, across CLI and model integrations.
- Company: Join JetBrains, a leader in intelligent software development tools with over 15 million users.
- Benefits: Enjoy competitive salary, flexible work location, extra time off, and mental health support.
- Other info: Dynamic environment with opportunities for learning, growth, and impactful projects.
- Why this job: Shape the future of autonomous development while working with cutting-edge AI technologies.
- Qualifications: Experience in machine learning or full-stack software development and strong coding skills.
The predicted salary is between 63000 - 77000 £ per year.
Are you an engineer who loves diving deep into ML models, building standalone CLI tools, and exploring how far AI agents can go in autonomous coding?
Do you want to rethink how software is built and use the tools you create every single day?
About Jet Brains
We create intelligent software development tools for developers and teams.
More than 15 million users, over 300,000 companies, and 88 of the Fortune Global Top 100 rely on our products to solve real, complex problems.
Our mission is simple: make development teams more productive and AI adoptable at scale.
What you’ll do
We build Junie, our AI coding agent, available across Jet Brains IDEs and as a standalone CLI.
We're combining the latest advancements in AI and LLMs with our decades of software development expertise.
We are working in three main areas: growing Junie CLI into a general-purpose agent independent of any IDE, optimizing model ensembling and setups for the best cost-to-intelligence ratio without compromising code quality, and pushing next-level autonomy so Junie can own, maintain, and evolve entire subsystems over multi-day horizons.
You’ll have end-to-end ownership over these initiatives, taking work from early research to production code while shaping the future of autonomous development.
Day to day, you will
- Develop and ship new features for Junie across CLI and model integrations.
- Experiment with model setups, ensembling, and cost efficiency strategies.
- Build and test autonomous agent behaviors for long-term project maintenance.
- Own the full development cycle from initial research to production-ready code.
- Use Junie daily to continuously iterate on its quality and user experience.
- What you’ll bring
- Comfort taking full ownership of decisions and implementation.
- The curiosity to challenge assumptions and experiment with new ideas.
- The ability to learn new concepts quickly and adapt quickly.
- A mindset focused on long-term impact rather than short-term workarounds.
- Strong interest in autonomous AI systems and software engineering tools.
- What you’ll need
- A proven track record of developing and shipping machine learning or full-stack software products.
- Hands-on experience working with LLMs, prompt engineering, or agentic workflows.
- The ability to write high-quality production code across the full development lifecycle.
- Practical experience building or fine-tuning ML models.
- What success looks like
In this role, success means taking bold experiments in agent autonomy and cost efficiency and turning them into reliable, production-ready capabilities.
You'll know you're succeeding when Junie can tackle complex multi-day engineering tasks autonomously and the tool you build every day actively improves your own engineering workflow.
Why join Jet Brains?
- Strong base salary. We offer competitive pay that reflects your skills and experience.
- Flexible work location. Enjoy the freedom to work from home or from the office.
- Remote work. Spend up to 30 days per year working remotely from abroad.
- Extra time off. More days to relax, recharge, and do the things you love.
- Medical insurance allowance. Enjoy peace of mind for you and your family
- Learning and development opportunities. Access to conferences, courses, and language classes.
Relocation support. We help make your move as smooth and stress-free as possible. (keep if relevant for the role)
- Language classes. Pick up the local language or sharpen your English skills.
- Fuel your day. Enjoy a hot meal or receive a lunch allowance on workdays.
- Mental health support. To help you feel your best, we provide easy access to professional mental health services.
- Sports benefit. Enjoy an on-site gym or sports club stipend.
- Internal events. Join company-wide celebrations and team gatherings.
*Some benefits may vary depending on location.
- #LI-DNI
- We are an equal opportunity employer
We know great ideas can come from anyone, anywhere.
That’s why we do our best to create an open and inclusive workplace – one that welcomes everyone regardless of their background, identity, religion, age, accessibility needs, or orientation.
We process the data provided in your job application in accordance with the
Recruitment Privacy Policy.
Fullstack Machine Learning Developer (Junie) in London employer: JetBrains
JetBrains is an excellent employer for those looking to make a significant impact in the software development landscape. With a strong focus on innovation and a collaborative work culture, employees are encouraged to grow their skills while working on cutting-edge AI-first tools. The flexibility of remote work combined with opportunities for professional development makes JetBrains a rewarding place to advance your career.
StudySmarter Expert Advice🤫
We think this is how you could land Fullstack Machine Learning Developer (Junie) 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 JetBrains 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 JetBrains.
✨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 JetBrains.
✨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 JetBrains 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 Fullstack Machine Learning Developer (Junie) 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 JetBrains.
Craft a killer cover letter:Your cover letter is your chance to stand out—make it personal! Explain why you want to work at JetBrains 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 JetBrains
✨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 JetBrains 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.
