Senior Backend Engineer

hackajob is collaborating with Virgin Media to connect them with exceptional tech professionals for this role. Full / part time: Full time Business area: Tech, Software Location: Uxbridge (can be remote with monthly office visits) A Bit About Giffgaff Do you want to join a connectivity provider that’s up to good? At giffgaff we do mobile & broadband differently. We call out the bad and find a better way. We’re laser-focused on flexibility, value and mutual good. And we’re so proud to be a certified B Corp. This means we've joined a network of more than 1,000 UK companies, who want to make a positive impact on people and the planet. Working at giffgaff is something you could be proud of too. You’ll get the best of both worlds, the energy and fast pace of giffgaff, plus all the benefits that come with being part of our parent company, Virgin Media O2. Our business model is unique. We work with our members (our customers) to understand their needs in all areas of the business. We love this highly collaborative approach. Over the past few years our member base has grown steadily, and we’re still going. We’re always looking to acquire new members, and to do that we need the best people in our team. Our bright and modern gaff is in Uxbridge, in leafy West London. But if commuting isn’t your favourite, most of our roles can be hybrid or work from home, or anywhere in between. If you like coming in, you’ll always find some office buddies. And if you like big occasions, we really bring the office to life monthly for our themed culture days. Plus all our giffgaffers come together at our legendary giffgaff summer, birthday and festive celebrations. The role and the team You’ll join a high-performing team that’s focused on delivering a best-in-class broadband experience for our members (that’s what we call our lovely customers), enabling them to have access to our shiny new broadband offering, featuring no long contracts, fast, dependable full fibre and symmetrical speeds to name a few awesome features. We strive for an outstanding member experience in all areas of giffgaff, so we are looking for a passionate and enthusiastic software engineer who cares about the quality of their work and how the software and services they create will positively impact members. We’re constantly looking for ways to improve and evolve how we solve problems, driven by new, modern practices and challenging the status quo. You will work in a cross-functional team with like-minded people to ensure this product is successful and sustainable. We work with many teams at giffgaff, including various partners and associates we rely on, to ensure we're active and engaged with our engineering community, improving our ways of working and maintaining a high standard and quality of products we create. Our Tech Stack Server-side: Java 21, Maven, Spring Boot, JUnit. Client-side: Typescript, Next.js, React, and related ecosystem tools and libraries. Infrastructure: AWS, Kubernetes, Terraform, Kafka, DynamoDB, PostgreSQL, Redis, ElasticSearch, Kibana, Grafana, and Prometheus. However, you should be comfortable using a variety of frameworks, languages, and tools and be happy to learn new skills when the need arises. Key Responsibilities Work with a full-stack attitude within a self-organising, cross-functional product engineering team, using extreme programming practices, notably pair programming and test‑driven development. Build, support and maintain automated, fault‑tolerant, scalable products and solutions continuously delivered into our production environment. Leverage your experience and skills to assist your team in establishing the best architecture for your products and services. Be technically curious, proactive and able to produce solutions your colleagues can use, maintain, and learn from. Know how to develop and follow a sense of purpose. Identify improvements in the software that you use and build. Accept feedback and adapt to your team and the company's current priorities. The Must Haves Test Driven Development, Pair Programming, Clean Code & Refactoring, System Design Observability, "you build it you run it" attitude Product mindset Good communication, giving and receiving feedback Desirable Skills Event-Driven Architecture; SOLID principles; microservices; micro-frontends Experience in payments/financial systems Seniority level Mid‑Senior level Employment type Full‑time Job function Engineering and Information Technology Industries Software Development #J-18808-Ljbffr