Junior Software Engineer jobs in United Kingdom

Hi! We're UW. We’re on a mission to take the headache out of utilities by providing them all in one place. One bill for energy, broadband, mobile and insurance and a whole lot of savings!

We’re aiming to double in size as we help more people to stop wasting time and money—big ambitions, to be delivered by people like you.

Got your attention? Read on…

We work together. Your team and the people you will work with…

We work in small, fully autonomous teams with real ownership of their products.

Energy is at the heart of UW, with over 95% of our customers taking at least 1 Energy service. As a Senior Software Engineer in the Energy team, you'll find yourself working on high-impact projects such as our ongoing Energy Transformation and Market Wide Half Hourly Settlement - projects which lay the foundation for the next phase of UW.

You’ll be joining our Products, Tariffs and Discounts team - a key part of our Energy Transformation. Working primarily with Go, Postgres, Kafka & Kubernetes, you'll contribute to our tariff management platform, which underpins our Energy product offering.

We put people first. It’s all about you…

We’re looking for a senior backend-focused engineer to work across our core energy platforms. You’ll own deployments end-to-end within our team’s Kubernetes namespaces and contribute to systems where resilience, reliability, observability and uptime really matter.

You’ll thrive here if you enjoy autonomy, solving distributed systems problems, and mentoring others as a player‑coach. Collaboration, pragmatism and low‑ego teamwork are essential.

• Strong, hands‑on production experience with Go (non‑negotiable)
• Proven fluency with Postgres, Kafka, and Kubernetes
• Solid experience building distributed systems, including concurrency and event‑driven architectures
• A strong understanding of system resilience, observability, uptime, SLAs, and progressive degradation
• The ability to deliver end‑to‑end solutions, from design through build, deployment, and ongoing support
• Experience working with CI/CD tooling, Terraform, and modern cloud workflows
• Familiarity with Kafka and database migrations (e.g. CockroachDB to RDS) as a plus
• Strong communication, collaboration, and problem‑solving skills
• The ability to thrive in an agile, iterative environment while delivering continuous feature improvements
• Experience mentoring mid‑level engineers and modelling engineering best practices
• Comfort working in autonomous, product‑focused teams

• Impact: Be integral in defining team goals, ensuring proposed work aligns with our objectives and driving prioritisation to best achieve them.
• Technical Mastery: Design and implement complex technical solutions that align with our strategy, influencing guidelines and standards across the wider engineering group. Take responsibility for technical decisions within your team, demonstrating expertise across multiple technologies.
• Planning & Delivery: Own large technical features from design to completion, making well‑informed trade‑offs between progress and perfection. Provide technical direction to your squad, proactively tackling debt and reducing complexity in our services and processes.
• Business & Domain Knowledge: Develop a high‑level understanding of our multi‑service business model, leading discussions on how your squad’s work contributes to the broader company strategy
• Leadership & Culture: Teach our culture to others and mentor engineers via pairing and code reviews, fostering collaboration where all voices are heard. Lead complex projects and discovery into unknowns, working well under pressure to drive the team forward.

• Staff Software Engineer
• Engineering Manager

• An industry‑benchmarked salary. We’ll share it during your first conversation.
• Share Options and Save as You Earn scheme.
• Flexible working — remote‑first with access to hot desks across the UK and a central London hub.
• Work‑from‑anywhere policy for up to 2 weeks per year.
• Discounts on our services and a free Cashback Card.
• Matched‑contribution pension scheme and life assurance up to 4x salary.
• Family‑friendly policies designed to help you and your family thrive.
• Discounted private health insurance, Employee Assistance line and free Virtual GP.
• Belonging groups helping shape an inclusive future.
• A commitment to learning and progression through our Career Development Framework with regular review and promotion cycles.

You’ve got this far… Hit apply — we can’t wait to hear from you!
Worried you don’t hit every criterion? We welcome applications from diverse backgrounds — get your application in and let’s chat!

Martyna Zbyszewska will be your point of contact throughout the recruitment process.

Not sure you meet all the requirements? Let us decide! Research shows that women and members of other underrepresented groups tend not to apply for jobs if they think they may not meet every qualification, when in fact they often do.

We provide equal opportunities, a diverse and inclusive work environment, and fairness for everyone. You are welcome to apply no matter your age, disability, gender, marriage or civil partnership status, pregnancy and maternity status, race, religion or belief, or sexual orientation. Please don’t be afraid to ask about what we can do to support your needs. All requests will be carefully and fairly considered.
Please note, if you are successful and offered a role at UW, you will be subject to a background check. Where checks are unsatisfactory or incomplete and/or a failure to reveal information relating to convictions that you are required to identify as part of the background checks, could lead to withdrawal of an offer of employment.