Lead Fullstack Engineer

Annapurna; Greater London; On-site; GBP 100,000 - 125,000; Full time

Job summary

A fast-growing fintech company is seeking a Lead Fullstack Engineer to take on a key technical leadership role in developing scalable solutions. This hands-on position requires strong experience in both frontend and backend technologies, including JavaScript and Node.js or Python. The ideal candidate will lead by example, mentor engineers, and collaborate closely with product teams. The company offers competitive compensation, flexible working arrangements, and a collaborative engineering culture.

Benefits

Competitive compensation and benefits

Flexible working arrangements

Opportunity to lead and shape core technical systems

Qualifications

• Strong experience as a senior or lead fullstack engineer in modern web environments.
• Deep knowledge of JavaScript and frontend architecture.
• Experience with Svelte, React, or Angular.
• Backend experience with Node.js and/or Python.
• Solid understanding of microservices architecture.

Responsibilities

• Lead the design and development of fullstack solutions in a microservices architecture.
• Drive frontend excellence, including component design, design systems, and web standards.
• Architect, build, and maintain scalable backend services.
• Collaborate with product managers and designers to translate requirements into technical solutions.
• Mentor and support engineers through code reviews, pairing, and technical guidance.

Skills

JavaScript

Svelte

Node.js

Python

SQL

Kubernetes

AWS

React

Angular

Job description

About Us

We are a fast-growing fintech company building modern, scalable platforms that power real-world financial products. Our engineering culture values clean architecture, strong ownership, and pragmatic innovation. We operate in a cloud-native, microservices environment and invest heavily in frontend quality, design systems, and developer experience.

The Role

As a Lead Fullstack Engineer, you will play a key technical leadership role across frontend and backend systems. You’ll help shape architecture decisions, lead by example in code, and work closely with product, design, and other engineers to deliver high-quality, scalable solutions.

This role is hands-on and ideal for someone who enjoys building modern web applications while mentoring engineers and influencing technical direction.

Responsibilities

• Lead the design and development of fullstack solutions in a microservices architecture
• Drive frontend excellence, including component design, design systems, and web standards
• Architect, build, and maintain scalable backend services
• Collaborate with product managers and designers to translate requirements into technical solutions
• Guide best practices around code quality, testing, performance, and security
• Mentor and support engineers through code reviews, pairing, and technical guidance
• Contribute to cloud and platform decisions, including deployment and observability

Tech Stack & Environment

Frontend

• Svelte (primary), with openness to React or Angular experience
• Strong focus on web components and reusable design systems
• Modern JavaScript / TypeScript

Backend

• Node.js or Python (microservices-based)
• API-driven architecture
• Infrastructure & Cloud:
• Kubernetes
• AWS
• Containerized, cloud-native deployments
• Data:
• SQL databases

What We’re Looking For

• Strong experience as a senior or lead fullstack engineer in modern web environments
• Deep knowledge of JavaScript and frontend architecture
• Experience with Svelte, React, or Angular (Svelte experience is a plus, not a requirement)
• Backend experience with Node.js and/or Python
• Solid understanding of microservices architecture
• Hands-on experience with Kubernetes and AWS
• Strong SQL skills and experience designing data models
• Proven ability to lead technically and mentor other engineers
• Comfortable working in a fast-paced fintech or product-driven environment

Nice to Have

• Experience building or maintaining design systems
• Exposure to web components standards
• FinTech, payments, or regulated-industry experience
• CI/CD and DevOps best practices

What We Offer

• Opportunity to lead and shape core technical systems
• Modern tech stack with real architectural ownership
• Collaborative, product-focused engineering culture
• Competitive compensation and benefits
• Flexible working arrangements