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Design, build, and maintain scalable Java-based backend systems for fintech products, developing REST APIs and microservices for payments, treasury, and transactions using Spring Boot and PostgreSQL. The role emphasizes clean code and TDD in a hyper-growth startup, working from the London office 3–4 days per week.
Backend Software Engineer building robust APIs and services for secure, mission-critical national security systems, with the opportunity to shape architecture. Works across the full backend stack in Java, Python, C++, C#, or Go from UK locations; active eDV clearance is required.
Senior backend engineer at Origin8tive in Cheltenham (DV clearance required) designing, building, and maintaining high-performance backend software in Java and C++ on Linux. The role involves working directly with customers, mentoring juniors, and driving code quality, automation, and testing practices.
Hands-on DevOps engineer who designs, secures and automates Iglu's AWS cloud estate (EC2, ECS, Fargate, S3, RDS), builds out Control Tower/Landing Zones, runs CSPM with Snyk, and supports TeamCity/Octopus Deploy CI/CD, working in a lean Ops & Security team on a hybrid basis from Wimbledon or Portsmouth.
Senior DevOps engineer (SC clearance required) supporting a large-scale Azure data platform for a major public-sector programme: building CI/CD pipelines, developing Azure Data Factory/Synapse/Data Lake services, and provisioning infrastructure with Terraform. Contract role, inside IR35, aligned to Newcastle or Leeds.
Backend engineer at Duffel in London building the systems that search, price, book and service flights through airline distribution channels. Day to day is complex domain modelling and integration work, based hybrid from the Shoreditch / Liverpool Street office.
Kallidus is hiring a .NET backend engineer to design, build, and maintain scalable REST API services for large-scale SaaS applications. The role uses ASP.NET Core, Azure, SQL Server, and CI/CD in an Agile team, working hybrid (2 days in office) from the Bristol HQ or Lisbon AI Hub.
Lead Backend Engineer at Ocho People in Belfast, building and owning services end to end for a cloud security platform — architecture, deployment, monitoring and production optimisation — using Golang or Java on AWS/GCP/Azure with Kubernetes and Docker.
Lead backend engineer building and owning cloud-native services end to end in Golang and Java for a fast-growing cloud security startup in Northern Ireland. Day-to-day involves design, deployment, and reliability work on data-intensive distributed systems using Kubernetes, Docker, eBPF, and AWS/GCP/Azure.
Fully remote (UK-based) Java developer role designing, building, and maintaining Java applications and scalable microservices. Core stack is Java 8/11/17, Spring Boot, and RESTful APIs, with cloud deployment and modern CI/CD practices.
Backend developer building the core of a high-growth real-time messaging platform — distributed systems, low-latency Pub/Sub, state synchronisation and AI communication infrastructure — mostly remote with monthly meetups at a North London office. Core stack: Go and/or Node.js, with Kafka/RabbitMQ/NATS experience a plus.
CDL Software is hiring an intermediate Java engineer in Manchester (hybrid) to design, build and maintain Java applications across APIs and microservices, applying DevOps practices and AI-driven approaches while owning features end-to-end with Product and Platform teams.
A software-focused Network DevOps Engineer builds Python tools, CI/CD pipelines, and Ansible automation to manage MBDA's physical and virtual network infrastructure, applying software engineering practices (testing, version control, Source of Truth data models) and upskilling the network team. Hybrid: 2-3 days onsite in Stevenage.
DevOps Engineer building and maintaining cloud-native and on-premises infrastructure, CI/CD pipelines, and IaC automation using Terraform/Ansible, Docker, Kubernetes, and major cloud providers. Requires an active UK Developed Vetting (DV) security clearance and a British passport.
A graduate-level Java developer joins Radius's telematics division at its Crewe HQ, building scalable Java solutions for connected vehicle platforms on live projects. The onsite, Monday-Friday role includes mentored training across multiple technologies to build a long-term career.
A mid-level Java Developer will join Insight Global on assignment for a financial services client in Birmingham, UK, evaluating, migrating, and potentially decommissioning ~60 inherited services (maintain, enhance, rebuild, or retire). Day to day involves Java/Kafka microservices work, stakeholder collaboration, and light production support such as log reviews.
Graduate Java Developer joining Radius's vehicle telematics team at its new Crewe HQ, writing scalable, testable Java code, integrating user-facing elements, and debugging live systems. Stack exposure includes Spring/Netty, Hibernate, relational and NoSQL databases, and front-end frameworks like Angular or React.
A hands-on Lead/Senior Java Developer building features for a large-scale public sector platform on a cloud-hosted microservices architecture. Day to day: turning Jira stories into Java 17+/Spring Boot services and REST APIs on AWS, with CI/CD via Jenkins, and optionally supporting Angular/TypeScript front-end work. Requires SC clearance (NPPV3) and 2 days/week onsite in Solihull.
A mid-level Java developer at a financial services client in Birmingham, UK, who investigates, enhances, and migrates (or sunsets) roughly 60 existing enterprise services, working hands-on with existing codebases, Kafka, and microservices built with Spring, Quarkus, or Vert.x, plus light production support.
Junior Software Developer at LearningCog, a leadership and sales training consultancy based in Brighton (hybrid, office-based). Day to day: building and testing accessible, responsive web frontends, supporting Python/Django backend work under guidance, documenting bugs and fixes, and managing tasks via GitHub and GitHub Projects.
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