Senior Full Stack Lead Engineer ReactJS

Huxley Associates; City Of London; Hybrid; GBP 90,000 - 130,000; Full time

Job summary

Huxley Associates in London is seeking a Senior Full Stack Lead Engineer to join a regulated financial services client. You will work across frontend and backend using ReactJS, TypeScript, JavaScript, and C#/.NET in a hybrid London-based role.

You will provide deep technical guidance, mentor engineers, and deliver hands-on development across REST APIs, distributed applications, and SDLC practices, in a 50/50 onsite/remote setup with a focus on engineering standards and quality.

Qualifications

• Significant hands-on experience in software engineering within large enterprise environments.
• Strong frontend engineering skills with ReactJS, TypeScript and JavaScript, plus backend experience with C#/.NET.

Responsibilities

• Lead full-stack development across frontend and backend initiatives.
• Mentor engineers and enforce engineering standards and quality across projects.

Skills

ReactJS

TypeScript

JavaScript

C#/.NET

REST APIs

Distributed application development

Job description

Senior Full Stack Lead Engineer ReactJS, TypeScript, JavaScript, C#/.NET Banking London

This is a new and exclusive opportunity for a Senior Full Stack Lead Engineer/ software developer with expertise across ReactJS, TypeScript, JavaScript, C#/.NET to join this investment Banking client as they expand their full stack software developer team in London city.

Title: Senior Full Stack Lead Engineer

Technical stack: ReactJS, TypeScript, JavaScript, C#/.NET

Employer: investment Banking

Location: London City and home working hybrid 50/50%

Permanent role, salary £90,000- £130,000 plus bonus

Role details

This is a new opportunity for a Senior Full Stack Lead Engineer to develop using ReactJS, TypeScript, JavaScript, and C#/.NET

This is a senior role for a technically strong engineer who can provide deep technical expertise, engineering guidance, and hands-on delivery support across frontend and backend (full stack) engineering initiatives.

Key focus

• Full-Stack Engineering
• Frontend Engineering (ReactJS)
• Backend Engineering (.NET / C#)
• Engineering Standards & Software Quality
• DevSecOps & SDLC Collaboration
• Technical Mentoring & Engineering Enablement

Required Experience

Significant hands-on experience in software engineering within large enterprise environments.

• ReactJS
• TypeScript
• JavaScript
• C#/.NET
• REST APIs
• Distributed application development

Strong understanding of modern frontend engineering practices and component-based architectures.

Deep experience working within a highly regulated financial services institution, demonstrating understanding of the pace and complexity of financial organisations.