Principal Full-Stack JS Engineer - Lead Modernisation

Hedgehog Lab; Leeds; Hybrid; GBP 65,000 - 90,000; Full time

Job summary

A digital product consultancy is seeking a Principal Full Stack JavaScript Engineer to join their Engineering team in Leeds. In this hands-on role, you will lead the modernization of a monolithic JavaScript platform, breaking it down into structured components while collaborating with senior engineers. You will contribute to architectural decisions and operational readiness in a flexible working environment. Ideal candidates will have deep expertise in JavaScript and strong full-stack experience. The position offers a supportive and collaborative culture along with various benefits including annual leave and well-being support.

Benefits

28 days of annual leave plus bank holidays

5 Impact Days per year for L&D

Flexible working environment

Enhanced parental policy

Annual well-being budget

Mental health support

Company-supplied Apple Mac

Qualifications

• Strong full-stack experience, including Node.js and API architecture.
• Comfortable working in small, flat teams with little hierarchy.
• Experience with Google Cloud and modern deployment platforms.

Responsibilities

• Lead hands-on full-stack engineering across a JavaScript platform.
• Break down an existing monolithic system into structured components.
• Work closely with senior client engineers to influence technical direction.

Skills

Deep expertise in JavaScript

Strong full-stack experience

Confident communicator

Experience with Node.js

Tools

Google Cloud

Vercel

Job description

A digital product consultancy is seeking a Principal Full Stack JavaScript Engineer to join their Engineering team in Leeds. In this hands-on role, you will lead the modernization of a monolithic JavaScript platform, breaking it down into structured components while collaborating with senior engineers. You will contribute to architectural decisions and operational readiness in a flexible working environment. Ideal candidates will have deep expertise in JavaScript and strong full-stack experience. The position offers a supportive and collaborative culture along with various benefits including annual leave and well-being support.