Junior Developer

We’re looking for a Junior React / TypeScript Developer to join our growing engineering team in South Yorkshire. You’ll work on projects including a modern web app used by field engineers and operations teams to manage day-to-day tasks. This role is ideal for a graduate or early-career developer eager to learn in a production environment and grow into a mid-level engineer over the next few years. What You’ll Do Build and enhance front-end features in our lux-mobile React/TypeScript app (Vite, React 19, React Router, Tailwind). Work with REST APIs using Axios and React Query. Fix bugs, improve performance, and enhance user experience for field engineers and internal users. Write clean, well-typed TypeScript code and develop reusable components and services. Collaborate with senior developers through code reviews, pair programming, and feature tickets. Use Git/GitHub for version control and follow our branching and review process. Technologies You’ll Use Frontend: React, TypeScript, Vite, React Router, Tailwind CSS Data/API Layer: Axios, React Query Backend: Python, Django, Django REST Framework Database: MySQL/PostgreSQL, Django models & migrations Background Processing: Task queues like Celery/Huey Auth & Security: JWT authentication (e.g., Clerk), API security best practices Tooling & DevOps: Git/GitHub, virtual environments, CI/CD pipelines What We’re Looking For Some commercial experience or strong personal projects in React & TypeScript (including university work or GitHub projects). Understanding of modern JavaScript/TypeScript, React hooks, and state management. Comfortable working with REST APIs and handling responses, loading, and errors. Knowledge of HTML/CSS fundamentals and responsive layouts (Tailwind experience is a plus). Familiarity with Git workflows (branches, pull requests, code reviews). A genuine interest in learning, taking feedback, and improving code. Good communication skills and ability to collaborate with a small, friendly team. Nice to Have Experience with React Query or other data fetching libraries. Exposure to async flows, task polling, or progress indicators. Interest or experience in energy, utilities, field service, or IoT projects. Familiarity with backend APIs (Node, Python, etc.) Interest in performance, reliability, and testing. About Us Founded in 2009, created to make the world a little greener by providing sustainable energy solutions, including solar panel systems and bio-mass boilers. Since then, we’ve installed over 70,000 domestic solar panel systems and 1,000 bio-mass boilers across the UK, delivering over 1 billion kWh of green electricity and counting. What We Offer Easy access to major motorways and local amenities. Modern tooling and a real-world codebase where your work goes to production. Friendly, collaborative team culture. Job Details Work Location: In person Position: Graduate JobType: Full-time - Salary: £25,000 to £33,000 per year Location: Role based in Barnsley with free onsite parking.