Full Stack Developer

We are delighted to be recruiting for a Junior Full Stack Developer (Backend-Focused) to join our growing development team. This position is central to the ongoing development, stability, and modernisation of Phoenix, our internal platform, as well as the integrations that support our wider business operations. This is a hands-on role suited to a developer who enjoys taking ownership from concept through to delivery. You will contribute to architectural decisions, work with legacy systems, and help shape the technical direction of our products in a regulated environment where accuracy and reliability are essential. Your Mission:

• Building, and maintaining backend services using Python
• Building, and maintaining frontend services using React
• Building and integrating RESTful APIs, including third-party integrations
• Contributing to system architecture and technical decision-making
• Refactoring and modernising legacy codebases in a structured, incremental way
• Addressing technical debt to improve long-term system quality
• Ensuring systems meet the standards required in a regulated industry, with a strong focus on accuracy and compliance
• Collaborating closely with developers, product stakeholders, and wider teams to deliver high-quality solutions

• Strong experience developing backend systems using Python
• Hands-on experience with cloud platforms, preferably AWS(GCP experience considered)
• Full stack development experience, with a clear strength on the backend
• Working knowledge of TypeScript and Node.js
• Experience building and consuming RESTful APIs
• Ability to contribute to and influence technical and architectural decisions
• Comfortable working with and improving legacy codebases
• Experience managing technical debt
• Strong sense of ownership, with the ability to manage work independently and see tasks through to completion
• Experience working in a regulated environment (energy, finance, healthcare, or similar)

Desirable:

• Familiarity with QA processes, testing strategies, or test automation
• Experience with Test-Driven Development (TDD)

Salary £30,000 - £35,000 Monday to Friday office based (Sunderland)

• Free on-site parking
• Generous holiday allowance plus bank holidays
• Professional and Personal Development Scheme
• Amazing perks including up to £40 off your home broadband
• A supportive, collaborative team and a phenomenal office culture

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At the Green Energy Advice Bureau (GEAB), we are passionate about driving the transition to a more sustainable future. As a leading consultancy in the renewable energy sector, we empower customers through innovative technology that supports smarter energy decisions. Our internal platforms and data-driven products play a key role in delivering efficient, compliant, and scalable energy solutions. Our values underpin everything we do and guide how we build, collaborate, and innovate.