Senior Software Engineer - Partner in London

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.

We work in small, fully autonomous teams with real ownership of their products. Partner is at the heart of UW’s growth, enabling thousands of Partners to introduce new customers to our services. As a Senior Software Engineer in the Partner team, you’ll work on products that support every stage of the partner journey—from onboarding and lead management to helping Partners grow and run their businesses. You’ll have the opportunity to shape new initiatives while continuously improving existing experiences through experimentation and data-driven decision making.

You will contribute to systems such as our Lead Platform, which intelligently routes leads to Partners, or the journeys that help Partners join UW, schedule appointments, and manage their business across our web and mobile applications. Working primarily with Go, Postgres, Kafka and Kubernetes, you’ll build scalable, reliable systems that support one of UW’s most important growth channels.

We’re looking for a senior backend-focused engineer who enjoys building scalable platforms and solving complex business problems. You’ll own deployments end-to-end within your team’s Kubernetes namespaces and help deliver services that are reliable, observable and resilient. You'll thrive here if you enjoy taking ownership, working across distributed systems, and collaborating closely with product managers, designers and engineers to deliver meaningful outcomes.

Senior Software Engineer Responsibilities:

• 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.
• Planning & Delivery: Own large technical features from design to completion, making well-informed trade-offs between progress and perfection.
• 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.

To be successful in this role, you’ll need:

• Experience with Go is preferred but not essential.
• 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.
• Hands-on experience with AI development tools; we value engineers who embrace AI in their day-to-day work.

Join a high growth FTSE 250 business with an ambition to grow our customer base to over 1 million over the next 4 years. Help us achieve our ambitions whilst learning and having fun. Become part of a fantastic business culture where people really are at the heart of everything we do.

We’ve got big ambitions so there’s going to be plenty of challenges. There are also a lot of benefits:

• Competitive salary: We benchmark against the industry and will share the salary openly during our first conversation.
• Performance bonus: An annual discretionary bonus ranging from 15-40%.
• Flexible working: We’re a remote-first business.
• Work-life balance: We offer an optional four-day working week (90% pay for 90% impact).
• Work from anywhere: You can work abroad for up to three weeks, twice every tax year.
• Holiday: 25 days plus.