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Senior Backend Engineer at CCP Games' Fenris Creations team in London building EVE Vanguard, a new game set in the EVE Online universe (rendered in Unreal Engine 5). Day to day: building AWS cloud infrastructure, CI/CD pipelines, monitoring, and game features/tools in Golang, plus joining a paid on-call rota after launch.
Backend engineer at Emma, a UK finance app, working directly with the CTO on backend infrastructure, data processing, and feature-rich integrations to scale services for millions of users. Core stack includes TypeScript, JavaScript, Node.js, and React.
A senior individual contributor designing and owning the Python backend and AWS infrastructure (Terraform, Kubernetes/EKS) for an early-stage AI governance platform, using AI coding agents like Claude Code across the SDLC. Reports to the Director of Technology in a hybrid London-based team.
Senior Backend Engineer at Xe in Bracknell owning end-to-end work on a cross-border payments platform: shaping API design and data models, building and modernizing backend services, and owning production reliability while mentoring engineers and partnering with product, compliance, and operations teams.
Senior Backend Engineer at Addition, owning production systems and building robust APIs for a well-established SaaS platform used by thousands of customers globally. The role centers on distributed services, cloud-native deployments, and third-party integrations, with a focus on reliability, observability, performance, and mentoring teammates.
Backend engineer on Wise's Contacts team in London, building the backend services that let customers add, find and manage payment recipients — from the platform securing millions of bank accounts to search algorithms and local integrations. Core stack: Java, large-scale distributed systems, REST APIs, and relational/non-relational databases.
A backend engineer will architect and build the entire backend from scratch at a well-funded pre-Series A AI startup — designing APIs, background workers, data pipelines, and AI agent workflows (LLM orchestration, tool calling, RAG) while working directly with the CTO and founders. Core stack: Python, FastAPI/Django, PostgreSQL, AWS, Redis/Celery/Kafka, and vector databases.
Depop is hiring a backend engineer for its Search and Retrieval team in London to maintain, scale and improve the search system serving 1M+ daily active users, working with mobile, web and ML/data-science teams. Core stack: Scala/Java/Python, Elasticsearch/OpenSearch, AWS datastores (DynamoDB, Athena), Kafka and PostgreSQL.
Backend engineer on Wise's Contacts Team building scalable backend services for managing money-transfer recipients, with end-to-end delivery in an autonomous team. Hybrid role in London (teams also operate in Tallinn), paying £68k–£87.5k plus RSUs and benefits.
Java software developer building large-scale, business-critical platforms in a highly regulated domain for a UK technology business. Remote-first with a monthly office visit near South Manchester; day-to-day work is Agile/XP (TDD, pairing, CI) on a Java 17/Spring Boot stack with React, AWS serverless, Terraform and Kubernetes.
Software engineer at a fast-scaling boutique technical consultancy serving national security, policing and central government. Day to day you design resilient backend services, integrate complex data sources and build analyst tooling, with a backend/cloud focus across Python, Java, C++, C#, Rust and AWS/Azure/Kubernetes.
Ocho People is hiring a Senior Java Engineer (hybrid, Belfast) for a product-led technology company. The engineer designs and scales core Java backend services on AWS, shapes architecture and engineering standards, and mentors other engineers.
Junior Java developer at LMAX Group in London working on its high-performance, ultra-low latency trading exchange written in core Java. Day to day involves greenfield projects, pair programming, and performance-critical work across the stack with Kubernetes, Nomad, Docker, Kafka, and MySQL.
Senior Java developer on UST's expanding Nottingham team, designing and building microservices-based applications on AWS using Spring Boot/Spring Cloud, REST APIs, and practices like TDD, BDD and pair programming. Hybrid role: 3 days onsite, 2 days remote.
Junior developer building Java-based backend applications and SQL integrations with Spring Boot and AWS for a financial services organization in Birmingham. Onsite five days a week (relocation support offered), collaborating in an agile team with mentorship and ongoing training.
A Java developer at Bonhill Partners builds and maintains real-time front-office trading systems for pricing, market making, and live trading, working directly with traders and quantitative researchers to turn pricing logic and volatility models into production Java code.
Java Developer at an elite fintech trading firm in London (hybrid), building highly scalable, low-latency trading infrastructure and greenfield projects using the latest core Java. Requires 2+ years of experience, strong Java skills, solid CS fundamentals, and a CS degree from a well-reputed university.
Senior Java Developer onsite in Central Newcastle (Mon-Fri) modernising a legacy C++ trading system into a Java-based real-time trading platform. Day to day is backend, multithreaded, low-latency Java development with strong financial-markets knowledge, working with Front Office teams and using Java and Claude.
Senior hands-on Java developer in Central Newcastle transforming a complex legacy C++ trading system into a modern Java application, building robust, low-latency, real-time trading systems alongside front-office trading teams. Core stack is multithreaded Java with AI tooling like Claude.
A senior Java developer at UST in Nottingham (hybrid) who designs, implements, and owns features in a microservices ecosystem, leading development on team components and driving architectural decisions. Core tech includes Java, Spring Boot/Spring Cloud, AWS, and API design.
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