Full Stack Software Engineer

Permanent Futures Ltd; United Kingdom; On-site; GBP 50,000 - 70,000; Full time

Job summary

A leading technology firm in the UK is seeking a software developer to join a national greenfield initiative. You'll be responsible for designing, developing, and deploying a new secure policing application. Candidates should have around 5 years of experience in full-stack JavaScript development, with a strong focus on clean coding and quality documentation. This role also requires experience with modern technologies like React and Node.js.

Qualifications

• Approximately 5 years' experience in full-stack JavaScript development.
• Experience building web applications and REST APIs from scratch.
• Proven experience in secure or regulated environments is a plus.

Responsibilities

• Build and maintain secure, scalable APIs and backend services.
• Develop lightweight front-end components in React and HTML5.
• Design and integrate RESTful interfaces.

Skills

Full-stack JavaScript development

Debugging

Optimisation

Problem-solving skills

Tools

React

Node.js

Express.js

SQL Server

Azure DevOps

Job description

About the role
Join a national-level greenfield initiative delivering a brand-new secure policing application built entirely from scratch. You’ll be part of a small engineering squad focused on hands-on builds – designing, developing, and deploying new features end-to-end in a modern Azure environment.

We’re not looking for maintainers or BAU coders – we want true builders who can take ownership of workload, write clean, tested code, and deliver scalable, secure software.
Core Tech Stack
Frontend: React, JavaScript (ES6+), TypeScript, HTML5, SPA patterns

Backend: Node.js, Express.js, RESTful API development, Azure Functions, Azure API Management

Database / Integration: SQL Server (T-SQL, ORM frameworks), GitHub, Azure DevOps

DevOps / Testing: Unit & Integration Testing, CI/CD pipelines, code review practices

Role Responsibilities

• Build and maintain secure, scalable APIs and backend services in Node.js/Express
• Develop lightweight front-end components in React and HTML5
• Design and integrate RESTful interfaces to support national systems
• Write clean, well-documented code and support project documentation as it grows
• Optimise SQL Server databases and data access patterns
• Collaborate with DevOps engineers on Azure deployments and CI/CD
• Participate in peer reviews and continuous improvement sessions

What we are looking for

• What We’re Looking For ~5 years’ experience in full-stack JavaScript development
• Demonstrable experience building web applications and REST APIs from scratch
• Strong debugging, optimisation and problem-solving skills
• Proven background working in secure or regulated environments a plus
• Passion for quality and documentation (we’re building this from the ground up)

Security Clearance Requirements

• Active NPPV3 and SC Clearance preferred – or eligible to undergo both.