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Prepare system-design walkthroughs, full-stack debugging stories, and how you balance product tradeoffs. Be ready to discuss London-office collaboration, code review habits, and past ownership of APIs plus UI.
Strong fit if you want senior full-stack ownership at Flagstone in central London and prefer office collaboration over remote. Thin public company data means validate culture and stack directly in the interview.
As a Senior Full Stack Engineer at Flagstone’s London office, you would typically ship features end to end: clarify product needs, design APIs and data models, implement UI and services, review peers’ code, and unblock incidents with ops or product. Expect collaboration onsite in Mayfair, not a remote-first cadence.
Useful free training aligned to software developers:
No—the listing is for Flagstone’s London office (remote flag is off).
Great Castle Street, East Marylebone / Mayfair, Westminster, W1W 8LP.
freeCodeCamp, Saylor CS courses, CS50, and Microsoft Learn paths listed above are free or free to learn.
Senior Full Stack Engineer - ContractFlagstoneLondon Office The Opportunity At Flagstone, we're revolutionizing how individuals, businesses, and charities manage, protect, and grow their cash. We are seeking a Senior Full Stack Engineer with 7+ years of experience to join our dynamic team. As a key member of an Agile software development team, you will contribute to the design, implementation, and maintenance of high-quality systems that drive innovation in financial technology. Key Responsibilities Foster best practices and automation to ensure software quality within the Agile environment Collaborate with cross-functional teams to identify how technology can solve business challenges Design, implement, and maintain high-quality systems, including system design and architecture Provide subject matter expertise in full stack development Contribute to the continuous improvement of software processes and tools Who We're Looking For We are looking for a Senior Full Stack Engineer who is passionate about delivering large-scale projects and maintaining high-quality systems. You should have experience in full stack development, system design, and architecture. A collaborative spirit and the ability to work effectively with diverse teams are essential. Additionally, you should be committed to fostering a culture of kindness, respect, and growth. About Flagstone Flagstone is a thriving, profitable business where smart people do their best work. Our unique culture is built on collaboration, diversity, and shared purpose. We believe in creating an environment where your voice is heard and valued, and where you can surpass your own expectations with support and room to develop. Join us as we change the world of financial technology through drive, talent, and empathy. Applying for This Role To apply, complete your application directly on this page, or you'll be redirected to the employer's application platform to finish submitting there.
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