Top Backend Jobs in Belfast

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.

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.

Ownership of backend features for Agentic Tools: design and implement GraphQL/REST APIs, build secure scalable Ruby on Rails services, improve RSpec automated tests, collaborate across product and AI teams, participate in Tier 2 on-call, and shape architecture for AI agent interactions with GitLab.

As a Backend Engineer, you'll improve Git and Gitaly by contributing features, bug fixes, and performance improvements, collaborating with the open source community, and participating in architectural discussions.

Build and maintain backend AI capabilities for GitLab Duo Chat: design flow components and agentic flows in Python/LangGraph, integrate LLMs and multi-agent orchestration, implement and maintain APIs in the Rails monolith, improve observability and reliability, and participate in on-call rotations and cross-functional collaboration to deliver safe, scalable AI chat features.

Build tooling, workflows, and guidance to make GitLab easier to deploy, validate, and operate across cloud-native and self-managed environments. Evolve deployment guidance, improve production-like ephemeral environments, and maintain consistent deployment artifacts and environment contracts across development through production.

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.

Design, build, and operate the high-availability event and trigger system that links GitLab and third-party events to AI-powered Duo Flows. Work in GitLab's Rails monolith, scale for high throughput, influence architecture, add trigger types, collaborate cross-functionally, and participate in Tier 2/3 on-call rotations to troubleshoot production issues.

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 Backend Engineer, you will build scalable and secure backend solutions, contribute to innovative projects, and uphold high security standards.

As a Senior Back End Engineer at Kyra, you will develop and manage backend services, handle infrastructure deployments, and maintain CI/CD pipelines while collaborating with cross-functional teams on product features.

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.

Develop scalable backend infrastructure for AI healthcare tools, focusing on API development, data processing, and compliance. Manage integrations with healthcare systems.

The Senior Backend Developer will drive impact by collaborating with stakeholders, design and develop high-quality software, shape architecture, and lead technical direction while promoting innovation and collaboration within the team.

The role involves back-end development using .NET Core and SQL, contributing to Jibble 2.0 API integrations, and collaborating with product and design teams.

The Backend Software Engineer will develop and maintain backend systems for data processing related to coffee farming, utilizing Python and PostgreSQL. Responsibilities include feature development, problem-solving, and adapting systems to regulatory changes while ensuring system resilience.

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

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

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

Lead design and implementation of high-performance agent runtimes, backend services, and self-hosted model/agent infrastructure. Build low-latency execution systems, real-time data pipelines, telemetry loops, CI/CD for zero-downtime deployments, and ensure fleet reliability on AWS/EKS.

Lead design, development, and maintenance of scalable, secure backend systems and APIs for a multi-chain DeFi platform. Architect solutions, optimize performance, implement monitoring and testing, uphold code quality, mentor junior engineers, and document APIs and technical processes.

As a Senior Backend Developer at Awarri, you'll build and maintain backend systems for AI platforms, focusing on scalable architectures, data integration, and real-time communication.

The Senior Backend Engineer will enhance back-end development with Python/Django, implement new features, and improve architecture while collaborating with an Agile team.

CoW DAO seeks a Senior Backend Engineer to build decentralized trading protocols, focusing on backend services in Rust and contributing to the evolution of blockchain applications.

Responsible for building scalable distributed systems, mentoring teammates, innovating on technical solutions, and improving team processes. Requires expertise in backend languages, especially Golang and Typescript.