RPLN0252945 - Software Engineer

Certain Advantage; Greater London; Hybrid; GBP 100,000 - 125,000; Full time

Job summary

A leading energy trading business is seeking an experienced JavaScript React Developer for a hybrid position in London. The role requires 8+ years of experience in software development, a strong knowledge of React and TypeScript, and familiarity with Azure DevOps and Agile methodologies. This contract position offers an opportunity to work on business-critical applications in a fast-paced environment.

Qualifications

• 8+ years of software development experience.
• Strong proficiency with JavaScript, React, and TypeScript.
• Experience with cloud services, particularly Microsoft Azure.

Responsibilities

• Design and build modern web applications using React and TypeScript.
• Collaborate on solution design and integration with APIs and cloud infrastructure.
• Ensure applications meet high performance and accessibility standards.

Skills

JavaScript

React

Redux

TypeScript

REST APIs

Agile delivery

Cloud experience

Jenkins

Docker

Git

Tools

Azure DevOps

Jest/Vitest

Webpack

Styled Components

React Testing Library

Job description

Overview

JavaScript React Developer — London (Hybrid) — 6 month contract — Rates: Negotiable

We are seeking an experienced Software Engineer to join a global technology team within a leading energy trading business. This role is suited to a developer with strong front-end expertise, solid cloud experience, and a track record of delivering business-critical applications in fast-paced environments. The ideal candidate will have excellent problem-solving skills, a user-focused mindset, and the ability to thrive in Agile delivery teams.

Key Responsibilities

• Design and build modern web applications using React, TypeScript, CSS, Jest/Vitest, Webpack, and Ag Grid.
• Apply modern JavaScript coding, testing, debugging, and automation techniques.
• Contribute to the creation and optimisation of CI/CD pipelines and deployment practices.
• Collaborate with global teams on solution design, technical delivery, and integration with APIs, databases, and cloud infrastructure.
• Ensure applications meet high standards of performance, accessibility, and user experience.
• Support functional excellence through the adoption of best practices, standards, and tooling.
• Work independently within defined workstreams, delivering high-quality, tested, and documented code.

Essential Skills & Experience

• 8+ years of software development experience.
• Strong proficiency with JavaScript / React / Redux / TypeScript.
• Styled Components and React Testing Library.
• REST APIs integration.
• Azure DevOps / VSTS - CI/CD build and release pipelines.
• Cloud experience, particularly Microsoft Azure.
• Agile delivery (Scrum, Kanban).
• Strong knowledge of software design principles and patterns.
• Familiarity with deployment and automation tools (e.g., Jenkins, Docker, Git).
• Solid grounding in Computer Science fundamentals (data structures, algorithms, system design).

If you are interested and keen to find out more, please apply now with your updated CV and reach out to Tom Johnson at Certain Advantage - Ref: 79086