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Senior Backend Engineer
Build and maintain scalable backend systems in Java or Go that power restaurant delivery platforms, using PostgreSQL, Redis, and cloud services like AWS.
Senior Backend Software Engineer
Builds and maintains backend services for an AI-driven marketing platform that automates restaurant promotions across delivery platforms, using Go, PostgreSQL, and cloud infrastructure.
Senior Backend Developer, AI Systems (Remote)
Senior backend developer at Movable Ink (Toronto) evolving the AI recommendations engine that powers billions of marketing personalization decisions daily into a modern distributed architecture. Deep Python distributed-systems work with Kafka, Kubernetes, and gRPC on Google Cloud, plus Spark/Flink/Beam data processing.
Senior Backend Engineer — Scalable Data Systems (Hybrid)
Backend engineer on HII Mission Technologies' Enlighten team, building and scaling critical data systems that manage trillions of records and serve hundreds of thousands of daily queries for the DoD. Day-to-day work spans RESTful APIs, open-source systems like Trino, and identity federation with Keycloak in a hybrid setting.
Senior Backend Engineer, AI at Scale — Remote
Seedtag's Contextualization Platform team seeks a senior engineer to build high-performance Go backend services powering real-time bidding at scale, turning AI innovations into production systems and scalable data pipelines for contextual advertising. Remote-friendly, with ownership of architectural decisions.
Senior Blockchain Backend Engineer
Senior backend engineer in London building enterprise-grade APIs and microservices in Java for digital asset platforms, driving blockchain-related components with banking-grade security, reliability, and performance.
Senior Backend Engineer for HealthTech Platform (Remote)
Senior backend engineer at Living With (Agentis Health Group) building a secure, scalable healthcare platform focused on patient outcomes. Day-to-day is mostly backend work in Java/Spring, PostgreSQL, and AWS, with occasional frontend contributions and close collaboration with product and clinical stakeholders in a regulated environment.
Senior Backend Engineer - Node.js/TypeScript | Remote
Remote-first senior backend role (with monthly travel to Belfast) where you own backend architecture, infrastructure, reliability, and security, building services in TypeScript on AWS. You'll drive technical decisions and improve CI/CD, observability, and API security; 5+ years of backend/full-stack experience is required.
Senior Backend Java Engineer - Hybrid in London
Critical Mass (an Interpublic agency) in London is hiring a Senior Backend Java Developer to build scalable Spring Boot services for a large automotive brand. Day to day involves leading Java backend work with Docker and RESTful APIs, collaborating with PMs, QA, front-end, DevOps, and architecture; AWS familiarity is a plus.
Senior Backend Engineer – Universal Search Platform
Mark43 in Manchester (Ancoats) is hiring a senior backend engineer to build scalable services powering its universal search platform across RMS, CAD, and analytics products. Day-to-day involves data indexing, event-driven patterns, and owning features end-to-end with a focus on observability, security, and performance.
Senior Java Backend Engineer – Hybrid, Pension & Life
Senior Java backend engineer for a UK pension & life product business in Banbury (hybrid). You'll shape a next-generation Java platform — building scalable backend services and APIs across greenfield work and platform modernization — using Java with Spring Boot or Micronaut.
Senior Node.js Backend Engineer
Senior backend engineer at Vista Global, a business aviation group, building customer-facing features end-to-end in London: designing scalable, secure Node.js APIs and PostgreSQL data models, adding monitoring/observability, leading architectural decisions, and mentoring teammates. Python/Java and AI dev tools are pluses.
Senior Backend Developer
Senior Backend Developer at Acorn Insurance in Liverpool (hybrid, 3 days/week in the city-centre HQ), building and running scalable C#/.NET 8.0 microservices on Azure with Docker/K8s, SQL Server, MassTransit/RabbitMQ and Grafana monitoring, while mentoring developers and helping shape architecture for £65k–£75k.
Senior Backend Developer: Java 17, Spring Boot & Microservices
Senior Backend Developer at Dceni playing a leading role in modernizing a business-critical planning system, building Java 17+/Spring Boot microservices and distributed, event-driven solutions within a DevOps team. On-site role in Utrecht, 36 hours per week.
Senior Java Developer | REST APIs & Backend Systems
Pivot Services is hiring a Senior Java Developer in Centurion, South Africa, to design, develop, and maintain Java-based applications and backend services. Day to day: writing clean code, building RESTful APIs, and collaborating across teams through all SDLC stages.