Senior Software Engineer in City of London, London

Location: London (preferred) or one of our EU offices. Open to speaking to people in any location as long as they are happy to be at one of our London or Spain offices.

Our mission is to enable everyone to build wealth. We reinvent how trading and investing work by creating exceptional products people love. Fostering a culture of excellence and high velocity is the key to our success. Today, we serve over 4.5 million clients, with more than €30 billion in assets under management - a testament to the scale and trust we’ve built in just a few years.

Role Summary: Trading 212’s founder is building a new, extremely lean R&D engineering unit with a single mandate: to rapidly prototype, build, and deploy the next generation of AI-driven financial applications for our millions of users. This is not a corporate role. We are looking for an exceptional, True Engineer, to operate in an environment with unparalleled freedom and zero bureaucracy. You will work 1:1 with the founder, transforming high-level product visions into market-ready prototypes and production code in weeks, not quarters. If your passion is to build, own, and see your work immediately impact millions—without the overhead of project leads or product managers—this is the opportunity to build the best part of your resume.

What You’ll Do:

• Rapid Prototyping & Ownership: You will be responsible for the entire lifecycle of new products, from initial concept (POCs) to production deployment.
• Immediate Impact: Unlike internal projects, your features will be core, user-facing products utilising AI.
• Architectural Leadership: Engage in high-level technical and product discussions with the founder, where you are expected to lead the technical direction and architecture.
• Setting the Bar: Ensure the highest standard of code quality and scalability, setting the technical precedent for all future hires in this unit.

What You Need to Have:

• Verified Seniority: Proven track record (Senior, Staff, or Principal level) in designing and implementing complex, high-scale software architectures.
• Architectural Mastery: Deep, demonstrable knowledge of system architecture, design patterns, and distributed systems, verifiable through a rigorous technical assessment.
• Complex Problem Solver: A history of successfully solving problems that require advanced technical insight, going beyond standard implementation tasks.
• Code Quality: An uncompromising commitment to writing high-quality, maintainable, and highly efficient code.

Why Join This Team?

• Unparalleled Freedom: Zero non-engineers (no PMs, no Project Leads) means your time is spent building, not negotiating priorities.
• Maximum Impact: Contribute to meaningful products for 2 million people, building out your resume with cutting-edge AI features.
• Direct Access: Work daily with a tech founder who is committed to a big, yet highly realistic vision for AI in FinTech.
• Compensation: Highly competitive salary and package.

What we offer:

• Challenges that will help you grow and realize your potential really fast.
• Opportunity to make a big Impact - you will build innovative services used by millions of investors to build wealth.
• Work with smart, spirited, helpful, high-performing colleagues with a common goal.
• An environment where nothing is set in stone.
• Appreciation for your talent and ideas.
• Generous remuneration package including annual bonuses.
• Excellent social benefits package, including private health insurance, sports card and 25 days of paid vacation per year.

Are you ready to accelerate your career with us? We’d love to hear from you! We thank all applicants, but only candidates selected for an interview will be contacted. All personal data of applicants is protected by the law and will be treated with strict confidentiality.