Top Backend Jobs in Belfast

As a Senior Backend Engineer, you'll oversee the Secrets Manager's architecture and development, ensuring secure handling of credentials and collaborating on backend solutions.

Senior PHP backend engineer to develop and maintain the Xodo Sign eSign platform. Work in a Scrum team across requirements, design, implementation, testing, and maintenance; build and scale REST APIs; optimize performance and security; perform code reviews; research and propose product enhancements; and promote engineering best practices.

Build scalable, data-driven internal tools and services in Python; lead technical strategy to measure AI impact across tooling, data pipelines, and dashboards; own end-to-end features from requirements to observability; partner with engineering, data, and delivery teams; set squad technical direction and mentor junior engineers.

The Senior Software Engineer will lead the development of backend systems for payment processing, collaborating with teams, setting goals, and fostering quality and ownership in code development.

As a Staff Backend Engineer at GitLab, you'll enhance backend infrastructure for CI, integrate AI features, and ensure reliability and performance in CI/CD workflows.

Join the Middleware team to build and maintain microservices powering real-time message delivery, tenant lifecycle management, and search. Develop features, scale services, implement automation with GitOps/CI-CD, and collaborate with SRE and senior engineers on code reviews, documentation, and operational tooling.

Responsible for project lifecycle from design to deployment, conducting reliability analysis, contributing to architectures, and interfacing with teams.

We are seeking a collaborative Backend Engineer with Java expertise to design, build, and maintain backend services, focusing on operational excellence and system reliability. Responsibilities include architecture, automation, and supporting production environments in a multi-cloud setting.

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

Responsible for leading and contributing to applications systems development, analysis, and programming activities in backend Java development.

The Backend Software Engineer will manage the lifecycle of short-term projects, perform reliability analysis on applications, and interface with teams to deliver features.

As a Senior Backend Engineer at DuckDuckGo, you'll lead backend projects, mentor engineers, and develop AI-enhanced features for the company's privacy-centric product line.

Build and ship backend features for a multi-tenant travel commerce platform, architect scalable systems, orchestrate AI agents and feedback loops, own end-to-end features, collaborate with PMs and senior engineers, and improve codebase productivity for humans and AI.

Nango is hiring Senior and Staff Backend Engineers to design, build, and optimize backend systems and APIs, collaborating with customers and driving product strategy.

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.

Build, operate, and own high-scale backend services focused on networking, performance, reliability, and security. Design systems, implement features, troubleshoot protocol-level networking issues, write maintainable tests, and collaborate across teams.

Build and operate backend systems and orchestration layers for LLM-powered insurance workflows. Implement inference pipelines, optimize latency/throughput/cost, ensure observability, debug distributed production issues, and collaborate across product, ML, and operations to deliver reliable, scalable AI services.

Lead technical execution and micro-architecture for backend platform services. Own design, implementation, and operation of scalable, resilient blockchain-integrated backend and indexing systems. Mentor engineers, enforce engineering standards, drive AI-first practices, write production Go and TypeScript code, and collaborate with Product, Security, DevOps, and Infrastructure teams.

Develop, maintain, and improve backend systems by designing and implementing PHP-based software, integrating components and third-party tools, writing clean code, deploying and verifying systems, and producing technical documentation while collaborating with cross-functional teams.

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.

As a Backend Engineer at Trust Wallet, you'll develop backend features for multiple platforms, maintain infrastructure, ensure system monitoring, and foster team growth.

Design and build high-performance backend services and APIs in Go to manage datasets, model assets, metadata, and workflow orchestration. Ensure scalability, reliability, observability, and CI/CD-driven deployments. Collaborate with frontend, product, and platform teams, contribute to architecture, resolve production issues, and support AI/ML evaluation pipelines and human-in-the-loop workflows.

Design, develop, and optimize high-performance Java backend systems. Contribute to architecture, implement core modules, troubleshoot production issues, perform code reviews, and improve scalability, availability, and reliability of distributed financial or blockchain systems.

Design, develop, and maintain high-performance, secure Java backend services and APIs. Ensure reliability, scalability, and cost-efficiency across microservices, databases, messaging systems, and capacity planning. Troubleshoot, profile, benchmark, and optimize systems (including ML applications) and collaborate with Kazakhstan stakeholders.

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.