Find a job 
Featured Companies 
Featured Universities 
For Companies At a Glance
- Tasks: Design and build secure, scalable backend and frontend components for a fintech platform.
- Company: Join Accountabl, a modern expense management platform revolutionising business spending.
- Benefits: Enjoy a competitive salary, hybrid work model, and opportunities for professional growth.
- Why this job: Make a real impact on a growing fintech platform and shape its future.
- Qualifications: 2-4 years of experience in full-stack development with strong JavaScript/TypeScript skills.
- Other info: Collaborative environment with ownership over meaningful projects and influence on technical direction.
The predicted salary is between 36000 - 60000 £ per year.
About Accountabl
Accountabl is building a modern expense management platform for growing companies, combining smart corporate cards, automated expense capture, and real-time financial controls into one seamless platform. We build fintech infrastructure that powers how businesses spend, track, and control. As we scale, platform reliability, performance, and thoughtful engineering are critical to delivering a seamless experience.
About The Role
This is a full-time, hybrid role based in London for a Full Stack Engineer. You’ll work closely with the Technical Lead and Product Team to build, maintain, and enhance Accountabl’s platform and integrations. From designing new features to strengthening backend services and APIs, you’ll contribute across the full development lifecycle. We’re looking for someone who writes clean, scalable code, thinks about system reliability, and takes ownership from idea through to deployment. If you enjoy building scalable fintech products and solving complex operational challenges, we’d love to hear from you.
What You’ll Be Doing
- Designing, building, and maintaining secure, scalable backend and frontend components
- Contributing to the architecture and implementation of new product features
- Developing and maintaining API integrations with external systems
- Working on authentication flows, webhooks, and data synchronisation processes
- Collaborating with Product to assess technical feasibility and support feature testing
- Participating in sprint planning, retrospectives, and Agile ceremonies
- Writing unit and integration tests to ensure platform stability
- Supporting performance optimisation, monitoring, and bug resolution
- Maintaining clear documentation for APIs and technical processes
- Continuously identifying opportunities to improve automation, reliability, and efficiency
What You’ll Need
- 2–4 years of experience building production-grade applications
- Strong experience with JavaScript / TypeScript (full-stack), writing production code across frontend and backend
- Experience with React (React Native for mobile is a plus) and modern SPA frameworks
- Experience with NestJS or comparable structured backend frameworks such as .NET or similar
- Solid understanding of clean, reusable, maintainable code, separation of concerns, and scalable system design
- Experience building and consuming RESTful APIs and/or event-driven systems
- Experience working with PostgreSQL, strong SQL fundamentals, and comfort across raw SQL, query builders, and ORMs
- Comfort working in an Agile development environment
- Strong problem-solving ability, attention to detail, and ownership mindset
- Clear communication skills and ability to collaborate cross-functionally
Why Join Accountabl
You’ll work at the core of a growing fintech platform, building and improving systems that power real transactions for real businesses. You’ll have ownership over meaningful parts of the codebase, from feature development to architectural decisions, rather than just shipping tickets. You’ll collaborate closely with product and leadership, giving you influence over technical direction and the opportunity to shape how the platform evolves as we scale.
Full Stack Engineer in London employer: Accountabl
Contact Detail:
Accountabl Recruiting Team
StudySmarter Expert Advice 🤫
We think this is how you could land Full Stack Engineer in London
✨Tip Number 1
Network like a pro! Reach out to folks in the fintech space, especially those at Accountabl. A friendly chat can open doors that a CV just can't.
✨Tip Number 2
Show off your skills! If you’ve got a portfolio or GitHub with projects that highlight your full-stack prowess, make sure to share it during interviews. It’s a great way to demonstrate what you can bring to the table.
✨Tip Number 3
Prepare for technical challenges! Brush up on your coding skills and be ready to tackle some live coding exercises. We love seeing how you think through problems and build solutions on the spot.
✨Tip Number 4
Don’t forget to apply through our website! It’s the best way to ensure your application gets seen by the right people. Plus, it shows you’re genuinely interested in joining our team.
We think you need these skills to ace Full Stack Engineer in London
Some tips for your application 🫡
Tailor Your CV: Make sure your CV reflects the skills and experiences that match the Full Stack Engineer role. Highlight your experience with JavaScript, TypeScript, and any relevant frameworks like React or NestJS. We want to see how you can contribute to our platform!
Craft a Compelling Cover Letter: Your cover letter is your chance to show us your personality and passion for fintech. Share why you're excited about building scalable products and how your problem-solving skills can help us tackle complex challenges at Accountabl.
Showcase Your Projects: If you've worked on any projects that demonstrate your full-stack capabilities, don’t hesitate to include them! Whether it's a personal project or something from a previous job, we love seeing real examples of your work and how you approach coding.
Apply Through Our Website: We encourage you to apply directly through our website. It’s the best way for us to receive your application and ensures you’re considered for the role. Plus, it shows us you’re keen on joining the Accountabl team!
How to prepare for a job interview at Accountabl
✨Know Your Tech Stack
Make sure you’re well-versed in JavaScript, TypeScript, and the frameworks mentioned in the job description. Brush up on your React skills and be ready to discuss how you've used these technologies in past projects. Being able to talk about specific challenges you faced and how you overcame them will show your problem-solving abilities.
✨Showcase Your Ownership Mindset
Accountabl is looking for someone who takes ownership from idea through to deployment. Prepare examples of projects where you’ve taken the lead, whether it’s designing a feature or resolving a critical bug. Highlighting your proactive approach will resonate well with the interviewers.
✨Understand Agile Methodologies
Since the role involves participating in sprint planning and retrospectives, it’s crucial to demonstrate your familiarity with Agile practices. Be ready to discuss how you’ve contributed to Agile teams in the past and how you handle feedback during sprints.
✨Prepare Questions About the Company
Show your interest in Accountabl by preparing thoughtful questions about their platform and future direction. Ask about their approach to system reliability and performance optimisation, as this aligns with the role's responsibilities. This not only shows your enthusiasm but also helps you gauge if the company is the right fit for you.
