Full Stack Developer jobs in United Kingdom

nsave is a fintech company headquartered in London. Founded by Amer Baroudi and Abdallah AbuHashem, our vision is to “Protect and grow the wealth of the financially excluded.” We provide trusted USD accounts and an investment platform for individuals living in distressed economies, where inflation is high and banking systems are unstable. Our compliance-by-design approach and proprietary technology allow us to deliver these services securely and at scale.

To date, nsave has raised $22M from leading investors including Sequoia Capital, TQ Ventures, Y Combinator, and SV Angel. Our team has grown 200% in the last year, and with so much more ahead, we’re just getting started.

Learn more at www.nsave.com.

📍 Location: Full-time, on-site role based in London (Spitalfields)

As a Backend Engineer at nsave, you’ll help design, build, and operate the core systems that power our financial products. You’ll work closely with our CTO, CEO, and engineering team to architect secure, scalable, and highly reliable backend services that support users across multiple regions and regulatory environments.

This is a high-impact role where you’ll own critical infrastructure and backend services end-to-end, balancing rapid iteration with the rigor required in a regulated fintech environment.

• A strong backend engineer: Comfortable designing and building scalable, reliable backend services and APIs.
• Tech-savvy: Proficient in TypeScript and NestJS (Node.js).
• Database and systems fluent: Experienced with relational databases (Postgres) and performance-sensitive systems.
• Cloud and infrastructure aware: Knowledgeable about AWS (ECS, RDS/Postgres), Docker, and CI/CD pipelines.
• Messaging and integrations focused: Familiar with event-driven architectures and messaging systems like Kafka.
• Security-conscious: Brings a security-first mindset and understands the demands of financial-grade systems.
• Collaborative and product-minded: Works closely with product and engineering peers to build systems that enable great user experiences.
• Curious and mission-driven: Motivated to solve real problems for people in financially unstable environments.

• Build core backend systems: Design, implement, and maintain high-performance, secure backend services and infrastructure.
• Power our financial platform: Own services supporting authentication, transactions, compliance, and banking integrations.
• Ensure reliability and scalability: Build systems that are low-latency, high-throughput, and resilient under real-world conditions.
• Improve system health: Proactively identify weaknesses in code and infrastructure and deliver improvements to reliability, security, and compliance.
• Balance speed with rigor: Move quickly while maintaining the standards required for a regulated fintech environment.
• Elevate engineering standards: Champion best practices in testing, observability, deployment, and operational excellence.
• Collaborate across teams: Work closely with product, design, and operations to translate user needs into robust technical solutions.

Alongside technical excellence, we look for people whose values align with ours:

• Service – “Mission First”: We put the mission, our customers, and our team above self.
• Urgency – “Stay focused. Move fast”: We act with urgency and intention, concentrating on what matters most.
• Ownership – “Act as an Owner”: We take responsibility for outcomes end-to-end.
• Standards – “Pursue Excellence”: We hold ourselves to high personal standards and continuously improve.

• Are deeply motivated by nsave’s mission and the problems we are solving
• Thrive in high-ownership, high-accountability environments
• Are comfortable operating with urgency and ambiguity
• Want to build from first principles in an early-stage, high-growth company

• nsave Share Options (subject to eligibility and plan rules)
• 25 days annual leave (+ UK Public Holidays)
• Private Medical Insurance
• Free monthly gym membership (via Hussle)
• £500 GBP Health & Wellness Budget
• Individual Learning & Development Budget
• Season Ticket Loan Scheme
• Cycle to Work Scheme

nsave is an equal opportunity employer. We are committed to creating a diverse and inclusive workplace and welcome applications from all backgrounds, identities, and experiences. We do not discriminate on the basis of age, gender, ethnicity, religion, sexual orientation, disability, or any other protected characteristic.