Senior C# Software Engineer – London

Overview

In this role you will design and evolve backend services powering core banking products at Zopa. You’ll shape technical direction, own complex initiatives end-to-end, and collaborate across product-engineering tribes to deliver scalable, secure systems. You’ll balance immediate delivery with long-term sustainability while mentoring peers and lifting team capability. This is a senior, impact-focused opportunity to help scale essential banking capabilities in a hybrid, cross-functional environment. You will work with modern tech and have a clear hook in transforming how money moves for customers.

Pay / Benefits

• hybrid work model (London office 2–3 days/week)
• flexible working arrangements including option to work abroad up to 120 days/year
• focus on work-life balance
• diversity and inclusion commitment
• growth and learning opportunities
• supportive engineering culture

Responsibilities

• Own complex initiatives end to end from idea to measurable outcome
• Design scalable backend systems to handle real-world scale
• Make architectural decisions balancing delivery speed and long-term sustainability
• Bring clarity to ambiguous problems and define actionable plans
• Influence prioritisation and trade-offs across teams
• Raise the bar for engineering quality, reliability and accountability
• Mentor engineers and strengthen overall team capability
• Drive continuous improvement in how we build and operate systems

Key requirements

• Track record delivering high-impact, complex systems in production
• Strong testing discipline with Test-Driven Development (TDD)
• Strong systems thinking and architectural judgment
• Ability to navigate ambiguity and turn complexity into actionable plans
• Confidence making data-informed technical decisions with long-term consequences
• Experience influencing beyond immediate team
• Deep customer focus with bias toward measurable outcomes
• Experience mentoring others and amplifying team impact
• Ownership beyond own output
• Willingness to learn JVM/Kotlin environment

• collaboration
• mentoring
• data-informed decision making
• C#
• Kafka
• Kubernetes

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