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Agent guide: [/agents.md](https://www.wearedevelopers.com/agents.md). --- # Senior Backend Engineer (Java) - Identity - **Company:** Zepz - **Location:** London, UK (Remote available) - **Experience:** Expert - **Salary:** £95,471.0 - **Contract:** Permanent contract - **Skills:** Java (Programming Language), Application Programming Interfaces (APIs), Artificial Intelligence, Amazon Web Services, User Authentication, Relational Databases, Software Debugging, Java Virtual Machine (JVM), Java Web Services, Python (Programming Language), PostgreSQL, Octopus Deploy, Software Tools, Grafana, Spring-boot, Code Structure, Backend, Kotlin, Event Driven Architecture, Kubernetes, Front End Software Development, Terraform, Grpc - **Published:** August 28, 2026 - **Apply:** https://www.adzuna.co.uk/jobs/details/5857850012 ## About the Role * Several years of experience building backend services at scale. * Strong understanding of modern JVM development centered around Java and the Spring ecosystem (Spring Boot). * Proficiency in Java; interest in or experience with Kotlin or Python is a plus. * Experience designing and operating REST/gRPC APIs, event-driven systems, and relational databases (e.g., PostgreSQL). * Ability to work with AI in a safe, structured environment. * Ability to work with tools like Grafana and Loki for debugging and fault finding. * Some understanding of Kubernetes, ArgoCD, and AWS cloud is advantageous, as well as technologies like Terraform. Technical Execution * You take pride in writing readable, well-designed, and well-tested software. * You will improve code structure and have an impact on architecture. * You will actively review tech designs and code from others. * You'll improve monitoring and the health of your team's systems. * You'll participate in on-call and production support - triaging incidents, restoring service, and following through on remediation so issues don't recur. Collaboration & Leadership * You'll build relationships with other engineering teams and identify collaboration opportunities. * You'll own larger pieces of work, assist with design and technical/implementation choices, and influence the roadmap within your team. * You easily communicate with non-technical team members and can translate their feedback into code. * You have experience working in a cross-functional team. * You adjust quickly and effectively to shifting priorities and complexity. Customer Obsession * Care about users, and want to give them an improved, simpler experience. * Are more of a "get it done" than a "perfectionist" type person - you value getting features into the hands of our users. * Aren't afraid to throw away code you wrote - because after testing, a flow you built doesn't work as well as a different one. Bonus points if you have * Experience with identity/authentication systems (Auth0 or comparable), MFA/OTP flows, or account-takeover prevention. * Familiarity with KYC/AML regulatory requirements in international payments. * Experience in fintech or other regulated, high-availability environments. * Familiarity with any of the communities we serve. AI Literacy & Tools As Zepz continues to build AI into how we work, we expect everyone to engage with it as a core part of their role. For this position we are looking for: * A genuine curiosity about AI and how it can be applied in your area of work, from accelerating analysis and insight generation, to improving how we design and deliver processes and communications. * Practical experience using AI tools in a professional context, whether to connect information, draft content, build frameworks, or create insights from data. We want people who actively use AI to increase productivity, not those who are waiting to be told to. * Strong AI literacy. An understanding of what AI assistants can and cannot do, how to prompt effectively, and how to critically evaluate AI-generated output before using it. * Awareness of the ethical considerations and responsible use of AI in the workplace, particularly in the context of sensitive data, customer experience, and compliance. * Prior experience using Claude (Anthropic) is a nice-to-have but not essential - what matters most is that you are genuinely engaged with AI as a tool, comfortable experimenting, and eager to share what works with your wider team If you want to join us in our journey to help break barriers in financial access and improve lives globally, there's no better place or time to join. Our global team of 800+ people is spread across six continents. We aspire to hire the best mix of people from former Olympians to YouTube influencers and we speak over twenty languages. This incredible diversity isn't a bonus; it's the engine that lets us serve the world. ## Description 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. We value individuals who are adaptable to a wide range of problems and challenges and can collaborate across teams to drive improvements. As a Senior Backend Engineer in the Identity domain, you will work within a cross-functional feature team building the services that power how millions of customers sign up, verify their identity, log in, and manage their accounts across WorldRemit and Sendwave - spanning authentication, onboarding, KYC, and account recovery. These are high-traffic, security-sensitive systems where reliability and low friction directly shape whether a customer transacts or churns. 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 and develop our Java services, build pipeline, and tooling. In Identity, backend engineers have a significant impact on the frontend too - you'll often need to consider the full user-facing experience, not just the API behind it. 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 production, and driving remediation and long-term fixes. ## Related Videos - [Exploring the Power of gRPC-Gateway for Writing RESTful Services](https://www.wearedevelopers.com/videos/2072-exploring-the-power-of-grpc-gateway-for-writing-restful-services) - [Kotlin Multiplatform - True power of native code reuse](https://www.wearedevelopers.com/videos/4-kotlin-multiplatform-true-power-of-native-code-reuse) - [Developing the Backend with Stefan Lingler, CTO at Shpock](https://www.wearedevelopers.com/videos/100360-developing-the-backend-with-stefan-lingler-cto-at-shpock) - [Inside Bitpanda's Tech Stack: Scaling a European Fintech Leader - Markus Dorner](https://www.wearedevelopers.com/videos/1979-inside-bitpanda-s-tech-stack-scaling-a-european-fintech-leader-markus-dorner) - [Boosting OpenSearch Performance: gRPC Search in Action](https://www.wearedevelopers.com/videos/1964-boosting-opensearch-performance-grpc-search-in-action) - [Agentic employees in world's most downloaded FinTech app](https://www.wearedevelopers.com/videos/100123-agentic-employees-in-world-s-most-downloaded-fintech-app) ## Related Articles - [Navigating the AI Shift](https://www.wearedevelopers.com/magazine/629-navigating-the-ai-shift) - [Coffee with Developers - Maria Apazoglou - Making AI understandable for all in production](https://www.wearedevelopers.com/magazine/475-coffee-with-developers-maria-apazoglou-making-ai-understandable-for-all-in-production) - [Fully Remote Software Engineer Jobs](https://www.wearedevelopers.com/magazine/447-fully-remote-software-engineer-jobs) - [Find a Developer Job: 12 Best Job Sites For Developers](https://www.wearedevelopers.com/magazine/165-find-a-developer-job-12-best-job-sites-for-developers) - [The Biggest German Tech Companies](https://www.wearedevelopers.com/magazine/424-the-biggest-german-tech-companies) - [Dev Digest 121 - AI goes offline](https://www.wearedevelopers.com/magazine/456-dev-digest-121-ai-goes-offline)