Top Backend Jobs in Belfast

Take end-to-end ownership of backend features and SaaS services in a microservices architecture. Design, implement, deploy, and operate scalable, reliable Node.js services. Work with Redis Streams, MongoDB, Kubernetes, and ensure test coverage, performance tuning, and collaboration with cross-functional teams.

Lead end-to-end projects for Pyroscope: design, build, and operate ingestion, storage, and query for a distributed profiling database. Drive product decisions, participate in customer calls, own on-call rotations, improve operational excellence and cost, collaborate across Grafana teams, and contribute to the open-source Pyroscope project.

The Senior Back-End Software Engineer designs, develops, and maintains scalable backend systems while taking ownership of the software development lifecycle.

Lead backend architecture and delivery for large-scale multiplayer game services. Architect distributed systems, write code, deploy infrastructure, mentor engineers, liaise with clients, design cost estimates, enforce best practices, and drive CI/CD, security, and production readiness.

Design, build and maintain backend services for multiplayer games. Implement distributed systems, CI/CD, containerised microservices, databases (SQL/NoSQL), cloud infrastructure, and documentation. Collaborate on estimates, support teammates, and ensure high-quality deployments and operational standards.

Design, build, deploy and maintain backend services for large-scale multiplayer games. Collaborate with peers and stakeholders on estimates, implement features, ensure CI/CD, docs, security, and support team members while operating autonomously in a remote environment.

As a Senior Backend Engineer, you'll design and maintain core libraries for blockchain transactions, enforce security boundaries, and contribute to best practices in a post-quantum environment.

Build and operate backend services for an AI-native context layer: ingestion, indexing, retrieval APIs, multi-tenant SaaS architecture, agent integrations, observability instrumentation, and production-grade reliability. Collaborate across product and infrastructure, iterate quickly, and shape technical direction.

Design, build, operate, and maintain multi-tenant telemetry databases (metrics, logs, traces) for Grafana Cloud. Deliver features end-to-end, participate in on-call rotations, contribute to open-source projects, collaborate remotely, and improve reliability, performance, and scalability of distributed systems running on Kubernetes and major cloud providers.

Join the Payments cross-functional team to design and build scalable backend services used by millions. Produce high-quality code, collaborate with product and design, follow agile practices, own testing and reliability, and iterate using A/B testing and data-informed decisions.

Design, develop, and maintain highly scalable microservices and backends (Java/Spring) for millions of users. Collaborate with product owners, perform code reviews, respond to production incidents, mentor junior engineers, participate in team ceremonies, and potentially share on-call duties.

Design, build, and maintain backend API and database services for a cloud PBX platform. Drive architecture, performance optimization, debugging, CI/CD and test automation, and collaborate with QA. Mentor peers and raise engineering standards while safely evolving high-load, networked systems.

Design and build core backend systems for an agent platform: orchestration, durable execution, memory, tool integration, observability, and evaluation. Create scalable services/APIs, develop retrieval and long-term memory solutions, monitor and improve agent behavior, and help drive technical direction and team growth for AI-driven collaboration features.

Lead design and implementation of backend services and distributed systems for real-time AI automation. Build scalable, observable microservices, streaming data pipelines, and async event-driven architectures. Collaborate across frontend, product, and DevOps to ensure performance, reliability, and seamless integration at scale.

The Full-Stack Engineer will enhance backend functionality, collaborate with teams, and maintain platform performance and security, requiring expertise in Python.

Administer, monitor, and support Java applications and Genesys Cloud. Provide production troubleshooting, minor bug fixes and enhancements, and act as primary POC for Java apps. Develop/support microservices using Java and Spring Boot, perform analysis of system behavior, and apply problem-solving and diagnostics to maintain service quality.

Build and operate distributed backend services and genomic reasoning engines that combine whole genome bioinformatics with AI. Design scalable data models, retrieval and vector search systems, and deterministic guardrails to ensure scientifically accurate, explainable genomic AI for production use.

As a Backend Software Engineer, you'll develop and maintain REST APIs using Django, manage cloud infrastructure, and oversee CI/CD pipelines to support consumer fintech applications.

The Backend Engineer will implement new SDK and Indexer features, automate testing, support integration, and oversee production releases.

The role involves owning product feature development, participating in system design, and maintaining software performance in an agile setting.

The Senior Staff Backend Engineer will lead technical direction for systems, manage engineering standards, mentor teams, and ensure alignment with broader company goals. Responsibilities include hands-on coding, architecture, and partnership with product teams to maximize impact.

As a Senior Backend Engineer, you will collaborate with cross-functional teams to build resilient software and support various banking operations using technologies like Go and Kubernetes.

As a Staff Backend Engineer, you will collaborate across teams to build and improve backend systems using various technologies, focusing on customer-centric solutions and resilient software.

Build and own backend services and APIs in Java for a multi-tenant SaaS. Ship end-to-end product features, operate services on AWS/EKS and Kubernetes, improve reliability, scalability, CI/CD/GitOps, observability, and platform tooling that enables agentic development. Drive architecture and work directly with product and customers.

Own end-to-end features across Java backends and a TypeScript/Angular frontend for a multi-tenant SaaS platform. Design APIs, schema and queries (MySQL/ClickHouse), build performant UIs, write unit/integration/e2e tests, deploy via containers/CI-CD, and integrate LLM/agentic workflows to help users find and fix data quality issues.