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Backend WordPress Developer
Back-end WordPress developer building custom plugins from scratch, extending third-party plugins, and writing PHP customizations for client requirements. Also optimizes themes, integrates REST APIs and third-party services, and keeps WordPress/WooCommerce sites secure, fast and up to date. Core stack: PHP, MySQL, WordPress.
Secure SRE & DevOps Engineer - SC Cleared
Site Reliability / Software Engineer (SC Cleared) in Gloucester building and running secure, mission-critical systems in a highly regulated environment. The role blends application development with DevOps and SRE duties — deployment automation, monitoring, and live service support — with possible hybrid working.
Senior DevOps Engineer
Senior DevOps Engineer at TP ICAP's ICAP Energy in Belfast, designing and automating secure, scalable AWS and on-premise infrastructure. Day to day: building CI/CD pipelines and IaC (CDK/Terraform), running Kubernetes/container platforms, and improving observability and production resilience.
Senior Scala Backend Engineer - Hybrid, Enterprise Cloud
Senior backend engineer on Sage's HCM Localisation team, building scalable cloud services in Scala (Play Framework, Pekko) that power complex HR workflows, while driving platform modernisation with best-practice engineering and observability. Hybrid: 3 days weekly in Newcastle or London.
Remote Senior Python Backend Engineer
Senior Python backend engineer at Webbyfox, a UK-based Python web development agency, who designs, builds and scales backend services end to end — architecture, API design, deployment and monitoring — while mentoring engineers and working with product, data and DevOps teams.
Remote Backend Engineer - Distributed Systems (Go/Node)
Design and build distributed, real-time messaging systems in Go and Node.js on a scalable platform serving developers and businesses worldwide, working with Pub/Sub, event-driven architecture, and AI-enabled infrastructure. Remote or hybrid from the London area, with equity and a competitive package.
Senior Backend Engineer - Go, Distributed Systems, Remote
Senior Backend Engineer at Monzo (London office or UK remote) building and supporting the bank's in-house banking platform, collaborating across squads in Core Banking, Payments, and Security. Core stack is Go with distributed systems tech including Cassandra, Kafka, Kubernetes, Docker, and AWS/GCP.
Senior Backend Engineer — Remote, Flexible Hours
Senior Backend Engineer at Monzo building parts of its UK banking platform with Go, Java or Scala, plus Cassandra and Kafka, deployed on Kubernetes and AWS/GCP. UK-based remote role with flexible hours, collaborating with product, design and ops to deliver robust, scalable services.
Senior Backend Engineer — Portfolio Data (Europe)
Senior backend engineer at Addepar maintaining and evolving the API services behind its financial/portfolio data platform, scaling them for the European market, modeling complex financial products, and ensuring regulatory compliance. Core work is backend API development.
Senior Backend Engineer
Senior backend engineer at Monzo, a UK digital bank, joining a cross-disciplinary squad to build and support parts of its in-house banking platform. Day-to-day is backend product work using Go, Cassandra, Kafka, Kubernetes and AWS/GCP; role is London-based or remote anywhere in the UK.
Security-Cleared Python Backend Engineer | ML Ready
Senior Python backend engineer in London (hybrid, 2-4 days on-site) building scalable backend services that power AI/ML solutions: productionising ML models with data scientists, building robust APIs, and deploying to cloud platforms with Docker and Kubernetes. Active SC or DV security clearance is required.
Backend Engineer for Global Payments & AI Platforms
Backend engineer on the X Money team building a global payments network for hundreds of millions of users. Day to day you design backend services, microservices, and data models for scalability, security, and reliability, collaborating across payments, fraud detection, and compliance in a startup-like environment.
Senior Java Backend Engineer — IAM & Cloud (Hybrid)
Senior backend engineer building high-scale Java (Spring Boot) services for a regulated financial services environment in Essex, focused on secure IAM (OAuth/Azure) and high-volume transactional workloads using TDD. Hybrid role requiring 4 days per week in the Essex office, with mentoring of junior engineers.
Python Backend Engineer - Wireshark Automation
Python backend developer on a 6-month London contract, turning manual packet capture into a 'Wireshark-as-a-Service' self-service web app. Day to day: automating network sniffing and packet capture with Python, REST APIs and Linux servers, working with Wireshark/TShark and PCAP workflows.
Backend Engineer
Backend engineer building the Go services behind Tantilium Cloud Runner — APIs, Kubernetes controllers and event pipelines that provision AWS/GCP clusters, deploy apps via GitOps and run AI agents for incident response. Stack: Go (Chi), PostgreSQL (Bun), RabbitMQ, client-go, Prometheus/Grafana.
eDV-Cleared Java Backend Engineer (On-Site Cheltenham)
24-month contract for a Java backend developer with eDV (Enhanced DV) clearance, based in Cheltenham with three days per week on-site, designing and maintaining secure Java services for a UK government environment. Core stack is Java, microservices and RESTful APIs in Agile teams; Spring Boot, Docker and Kubernetes are desirable.
Go Backend Engineer - Cloud Runner & Kubernetes
Build Go backend services for Tantilium Cloud Runner, a platform that provisions Kubernetes clusters and ships applications. You design APIs, controllers, and event pipelines using Chi, Bun on PostgreSQL, RabbitMQ, and Kubernetes client-go, while keeping the system maintainable as it grows.
Java Full Stack Developer
Senior contract role in London for a Java full-stack developer with 8+ years' experience: designing scalable applications with Java, Spring Boot and microservices, applying AI-assisted and Spec-Driven Development, maintaining CI/CD pipelines (Jules), managing GKP/FID setup, and integrating databases such as CockroachDB and MongoDB.
Senior Java Engineer - Hybrid, Mentoring & Platform Growth
Senior Java Engineer building Love2shop's web and mobile digital platforms using Java/Spring in a payments and loyalty domain. You'll collaborate with Product and Design, mentor colleagues, and support a Salesforce-based transformation and cloud initiatives, working hybrid with weekly on-site days in the Liverpool office.