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Career | Senior C# Software Engineer – London | Zopa

Senior C# Software Engineer – London

Zopa

London, GB

Job Type: Full-Time
Function: Engineering Software
Industry: Fintech
Post Date: 05/08/2026
Website: zopa.com
Company Address: Cottons Centre, Tooley Street, London, United Kingdom, SE1 2QG

About Zopa

Weâ€™re Zopa, and we want to make money work better for you.

Our diverse team is united in their mission of creating simple, fair and honest financial products that have the customerâ€™s needs at their heart. Weâ€™re proud that this dedication is reflected in our excellent rating on TrustPilot.

Job Description

We started our journey back in 2005, building the first ever peer-to-peer lending company. Fast forward to 2020 and we launched Zopa Bank. A bank that listens to what our customers don’t like about finance and does the opposite. We’re redefining what it feels like to work in finance. Our vision for a new era of banking puts people front and centre — we’ve built a business that empowers everyone to aim high, every day, to move finance forward. Find out more about our fantastic offerings at Zopa.com!

We’re incredibly proud of our achievements and none of it would be possible without the amazing team here. It’s not just industry awards we’re winning, we’ve also been named in the top three UK’s Most Loved Workplaces.

If you embrace unconventional challenges, are unafraid to think differently and are driven to make an outsized impact, you’ll thrive here at Zopa, so join us, and make it count. Want to see us in action? Follow us on Instagram @zopalife

The engineering challenge

You will design and evolve the services that power core banking products. The systems you help build process thousands of financial transactions every day. They must be scalable, resilient and secure. When money moves, it has to work. Every time.

But this role goes beyond implementation.

You will shape technical direction. Influence cross-team initiatives. Own complex, high-impact work from concept through to production. You will help decide not just how we build, but what we build and why.

This is senior in impact, not just title.

We’re growing across several of our product-engineering tribes at Zopa, with current opportunities in Current Accounts, Lending, Credit Cards and Product Enablement.

We care deeply about great engineering, which is why our core stack is Kotlin, running on a modern platform with Kafka, Kubernetes, Docker and AWS Aurora Postgres. But great engineers aren’t defined by a single language which is why we are agnostic with our hiring.

We want the right people, not the 'right' language, so if you come from a C#/.NET background, bring solid fundamentals, and have an appetite for learning something new, we’ll invest in you, help you grow your skills and confidently step into our Kotlin ecosystem.

Your impact:

Owning complex initiatives end to end, from idea to measurable outcome

Designing scalable backend systems that stand up to real-world scale and complexity

Making architectural decisions that balance immediate delivery with long-term sustainability

Bringing structure and clarity to ambiguous problems

Influencing prioritisation and trade-offs across teams

Raising the bar for engineering quality, reliability and accountability

Mentoring engineers and strengthening overall team capability

Driving continuous improvement in how we build and operate systems

Your toolkit:

You'll work with C#, Kafka, Kubernetes, Docker, AWS Aurora Postgres, and other modern technologies. If you haven't worked with all of these, we value skilled engineers with a willingness to learn.
A track record of delivering high-impact, complex systems in production environments
Strong testing discipline, with a commitment to strictly following Test-Driven Development (TDD)

Strong systems thinking and architectural judgement
The ability to navigate ambiguity and turn complexity into clear, actionable plans

Confidence making data-informed technical decisions with long-term consequences in mind

Experience influencing beyond your immediate team

A deep customer focus and a bias toward measurable outcomes

Experience mentoring others and amplifying team impact

Ownership beyond your own output

We’ll support your transition and cross-training into a JVM/Kotlin environment. What matters most to us is how you think, how you approach problem-solving, and the scale and impact of what you’ve built.

Our engineering culture:

Customer impact over unnecessary complexity
Team success over individual heroics
Operational ownership, not just feature delivery
Continuous improvement through honest feedback

Added bonus:

Experience with fintech or banking is a plus, but we value problem-solvers from all backgrounds

At Zopa we value flexible ways of working.

We value face-to-face collaboration and a good work-life balance. This hybrid role requires you to come to our London office 2-3 days a week.

You'll also have the option of working from abroad for up to 120 days a year!* But no matter where you are, we’ll make sure you’ve got everything you need to thrive, both in your work and home life, from day one.

*Subject to having the right to work in the country of choice

Diversity Statement

Zopa is proud to offer a workplace free from discrimination. Diversity of experience, perspectives, and backgrounds leads to better products for our customers and a unique company culture for our people. We are made up of nearly 50 nationalities, have a DE&I forum made up of Zopians wanting to make a difference and we are proud of our culture where everyone can bring their full self to work. Our approach to DE&I is reflected in our hiring process so please let us know if you require any reasonable adjustments.

We may use artificial intelligence (AI) tools to support parts of the hiring process, such as reviewing applications, analyzing resumes, or assessing responses. These tools assist our recruitment team but do not replace human judgment. Final hiring decisions are ultimately made by humans. If you would like more information about how your data is processed, please contact us.