Software Engineer

This role sits within giffgaff’s broadband engineering space, with a strong focus on backend development, building the services and platforms that power a seamless, reliable connectivity experience for members. You’ll be responsible for designing, developing and maintaining scalable, fault‑tolerant systems that support everything from hardware interactions to customer‑facing services, ensuring performance and reliability are at the heart of what you deliver.

Working as part of a cross‑functional product engineering team, you’ll collaborate closely with hardware specialists, customer teams and fellow engineers to continuously evolve and improve the platform. While the role is primarily backend‑focused, there is the opportunity to contribute to frontend development when needed, using modern technologies to deliver end‑to‑end solutions. You’ll work with a contemporary tech stack including Java, Spring Boot and AWS on the backend, alongside React and TypeScript on the frontend, all within a culture that champions pair programming, test‑driven development and continuous delivery.

Who we are: Do you want to join a connectivity provider that’s up to good? At giffgaff, we do things differently. We call out the bad and find a better way. We’re laser‑focused on flexibility, value and mutual good. And we’re proud to be a certified B Corp. This means we’ve joined a network of more than 2,000 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. We’re always looking to acquire new members, and to do that we need the best people on our team. In return for your outstanding efforts, you’ll be rewarded with a competitive salary and excellent benefits that are all about making your work life a winner.

The must haves:

• Strong experience with Java and Spring Boot for backend development
• Proven experience in test‑driven development, pair programming and clean coding practices
• Solid understanding of system design and building scalable, resilient services
• Experience with observability and a "you build it, you run it" mindset
• Strong communication skills and ability to collaborate effectively within cross‑functional teams

The other stuff we are looking for:

• Experience with event‑driven architecture, microservices or distributed systems
• Exposure to frontend development using React or TypeScript
• Familiarity with cloud infrastructure such as AWS, Kubernetes or Terraform
• Experience within broadband, telecoms or connectivity environments
• Interest in emerging technologies such as generative AI and modern engineering practices

What’s in it for you: Our goal is to celebrate our people and their lives. We aim to create a culture that empowers everyone to bring the best versions of themselves to work each and every day. We believe the most inclusive and diverse culture makes for a better business and a brighter world. Working at giffgaff means you get a bumper reward package bursting with benefits, and loads of extras you can add if you’d like. These are designed to support both you and your loved ones, making sure that you’re covered no matter what life throws your way.

We’re all about hybrid working here, so expect to have a base location where you’ll have the right facilities to enable amazing collaboration and quality time with your team, alongside all the right kit to work from home too.

Next steps: If we feel like a place where you can belong, we’d love to learn more about you as a person and your experience to date. Once you’ve submitted an application, the next steps of the process, if successful, are likely to include an initial recruiter conversation, a technical assessment and a panel interview. Please note: Applications will be reviewed, and interviews conducted throughout the duration of this advert, therefore we may bring the closing date forward. We encourage all interested applicants to apply as soon as possible. If you’re offered a job with us, it will be conditional, based on the passing of background checks. All roles require a criminal record check and some roles need a financial probity check. Your recruiter can provide you with more information, if needed. Thanks for your patience and for showing an interest in joining the giffgaff family.