Lead Fullstack Engineer

Annapurna; Sheffield; On-site; GBP 70,000 - 90,000; Full time

Job summary

A fast-growing fintech company in England seeks a Lead Fullstack Engineer to drive technological leadership across front and back end systems. The ideal candidate will have extensive experience with JavaScript, Svelte, Node.js, and cloud technologies such as AWS. This hands-on role involves mentorship and collaboration with product teams to shape scalable solutions, while contributing to architectural decisions. Attractive benefits include competitive compensation and flexible working arrangements.

Benefits

Competitive compensation

Flexible working arrangements

Collaborative culture

Qualifications

• Strong experience as a senior or lead fullstack engineer in modern web environments.
• Deep knowledge of JavaScript and frontend architecture.
• Backend experience with Node.js and/or Python.

Responsibilities

• Lead the design and development of fullstack solutions in a microservices architecture.
• Drive frontend excellence, including component design and web standards.
• Architect, build, and maintain scalable backend services.

Skills

JavaScript

Frontend architecture

Svelte

Node.js

Python

Microservices architecture

SQL

Kubernetes

AWS

Tools

Kubernetes

AWS

SQL databases

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