Senior Backend Engineer (Python/Kotlin)

Zepz; Greater London; Hybrid; GBP 90,000 - 130,000; Full time

Benefits offered by this job

Unlimited annual leave

Great healthcare benefits

Employee discounts

London office commutable distance

Job summary

Zepz is hiring a Senior Backend Engineer for RemittancePlus, centered on building and operating Universal Wallet, a multi-currency, crypto-capable wallet powering deposits, withdrawals and balances for millions of customers. You’ll own backend services and contribute across a mixed stack with Python and Kotlin/Java.

The role offers flexible remote readiness with a London-focused office presence, and opportunities to shape scalable, reliable fintech infrastructure within a fast-moving team.

Qualifications

• Senior backend engineer with a focus on building scalable services.
• Proficiency in Python and Kotlin/Java for backend work.
• Experience with distributed systems and reliability practices.

Responsibilities

• Develop and operate features for Universal Wallet in a multi-services stack.
• Collaborate with cross-functional teams to improve services, pipelines and tooling.
• Contribute to code reviews, deployments, and incident response in production.

Skills

Senior Backend Engineer

Python

Kotlin/Java

Distributed systems

Tools

AWS

PostgreSQL

Job description

Job Description

Join Zepz: Breaking Down Borders, Together

Job Description

Join Zepz: Breaking Down Borders, Together

Our Meaningful Mission

At Zepz, we're all about breaking down barriers for our customers and our teammates. Our purpose is deeply personal — we provide a lifeline and deliver opportunities to cross-border communities that need it most through cutting edge finance and tech.

Zepz is the power behind WorldRemit and Sendwave, driven by the mission to celebrate the incredible impact migrants have, both at home and abroad. We're not just moving money; we're building a world that truly recognizes and supports global connections.

Who You'll Be Joining

We look for mission-driven builders who thrive in a fast-paced environment connected to a true purpose. We're an always-developing team of experts that enjoy problem solving and bring clarity to tough challenges. At Zepz, we are Relentless Learners, always seeking feedback, and Responsible Owners, treating company resources like your own. We depend on Transparent Communicators who keep the team aligned through open, honest talk — this matters even more on a fully remote team, where clear written updates carry the weight that hallway conversations would elsewhere.

Our Core Commitments — What We Live By

• Integrity: We always do the right thing. It's simple, but it's the foundation of everything we build for our customers and each other.
• Outcomes: We work for our customers. Their success and prosperity are the results we focus on delivering.
• Velocity: We are fast! We maintain high energy levels and make smart decisions quickly, keeping us nimble and ahead of the curve.

Perks of Joining Our Team

We believe in empowering colleagues because we genuinely trust our team. Our culture is founded on this high trust, which naturally encourages the high ownership that drives us to meet our shared high expectations and deliver high performance. While we have all the tools to work remotely, we value the purpose and benefits of in-person connections so we expect our teams to come to the office on a regular basis, and therefore be within a comfortable commutable distance from our London office. Alongside a great office environment, think unlimited annual leave , great healthcare benefits, and employee discounts. We want you to thrive and focus entirely on making your biggest impact! In turn, we expect you to bring high ownership and commitment to your work. This is a place where we value trust and high performance, and we'll provide the environment and support needed for you to excel.

About the Role

At Zepz, our engineers are passionate about delivering a solid customer experience and are eager to contribute to the product, regardless of their tech stack. We are seeking engaged and customer-focused engineers who are committed to writing quality code and dedicated to their contributions at Zepz..

As a Senior Backend Engineer on RemittancePlus, you'll work within a cross-functional feature team building and operating Universal Wallet — the multi-currency, crypto-capable wallet powering deposits, withdrawals, and balances for millions of customers across Sendwave. This spans fiat and stablecoin flows, on/off-ramp integrations, and settlement — high-traffic, money-movement systems where correctness and reliability directly determine whether a customer's funds move when and where they expect.

You will have the autonomy to make platform decisions and provide insights to the rest of the team. You'll collaborate closely with engineers of varying experience levels and interests, helping to improve our services, build pipeline, and tooling across a mixed stack — Python services in sw-backend, and Kotlin/Java services underpinning Universal Wallet. You'll be committing, reviewing, and shipping code early on, with the support and time to ramp up properly — there's a lot to learn across our diverse systems.

Reliability is core to the role: the team owns its services in production, and you'll take part in the on-call rotation — responding to incidents, supporting