8,652 Senior Backend jobs
Senior backend engineering roles owning server-side systems and APIs.
Charm Security- Senior Backend Engineer – Platform
Senior backend engineer on the Platform team at Charm Security (a Team8-backed early-stage startup) building the core platform that runs AI agents protecting banking customers from scams and social engineering. Day to day: architect services, design real-time data pipelines and event-driven microservices, and own services end to end, primarily in TypeScript and Node.js with PostgreSQL.
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.
Python Backend Engineer – Factory Flow (Senior)
Senior Python backend engineer at McLaren designing, building and supporting services and APIs that modernise how parts flow through design, release, manufacturing, supply chain, inventory and race operations in a Formula 1 environment. On-site at the McLaren Technology Centre in Woking, working with engineers, product teams and business stakeholders.
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 Backend Engineer, Payments Platform (Card)
Senior Backend Engineer joining iwoca's Payments Infrastructure team in London, owning services end to end for a platform powering card payments, fraud monitoring, and cashback payouts. Focus on robust backend design and distributed systems, scaling payments within card scheme rules as iwoca grows.
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.
Senior Java Backend Engineer - High-Performance Systems
Hyppies Pte. Ltd. seeks a hands-on Senior Java Backend Engineer in Kuala Lumpur to design scalable services, optimize SQL queries, and resolve performance bottlenecks in high-traffic systems, while upholding reliability through testing, code reviews, and architectural improvements.
Senior Backend Engineer (Java)
Senior Java backend engineer in Kuala Lumpur focused on performance and scalability: building and tuning Spring Boot REST APIs, eliminating bottlenecks in code, SQL, and architecture, and keeping systems reliable under high traffic and transaction volumes. Open only to candidates in Malaysia with permanent working rights.
Senior Java Backend Engineer - Integrations & Distributed Systems
A senior Java/J2EE backend engineer at LAVU TECH SOLUTIONS in Kuala Lumpur will drive integration projects across internal and external systems, working with Oracle DB and modern API authentication. Day to day involves coding integrations, writing unit tests, contributing documentation, and collaborating with teams and third-party applications.