Top Backend Jobs in Belfast

Design, develop, and launch scalable backend systems and APIs for consumer payments. Break projects into deliverable phases, collaborate with product and engineering partners, monitor system reliability, support on-call operations, review code, debug systems, and contribute to technical decisions and team development.

Owns delivery of quarterly engineering goals, leads backend engineers through ambiguous problems, collaborates across product and engineering, improves system reliability and quality, supports production operations and on-call efforts, and develops team talent. Builds highly available distributed payment systems for international markets using scalable architectures, strong testing, monitoring, and operational practices.

Develop and maintain secure, reliable backend services for GitLab repository workflows using Ruby and GraphQL. Responsibilities include designing APIs and data models, optimizing SQL queries and performance, implementing caching and rate limiting, testing, troubleshooting, monitoring production systems, participating in Tier 2 on-call, improving observability, and collaborating asynchronously across engineering and product teams.

Build scalable backend systems, data pipelines, APIs, and services for Zscaler’s Threat Intelligence team. Process and index large volumes of threat data, improve performance and engineering practices, and collaborate with malware reverse engineering teams to enhance threat detection. The role requires Python, PostgreSQL, Redis, distributed systems, REST APIs, SQL optimization, and backend database expertise, with preferred experience in AI/LLM workflows, malware automation, Django, Kubernetes, and search engines.

Build and maintain secure, performant backend services for GitLab’s Change Record team using Ruby on Rails and GraphQL. Develop APIs, data models, business logic, tests, and user-facing workflows while improving reliability through performance tuning, caching, observability, rate limiting, and resiliency. Collaborate across teams, support production systems through Tier 2 on-call, troubleshoot incidents, and use AI coding agents responsibly.

Build and evolve scalable backend services, APIs, consumer applications, and internal tools using TypeScript and JavaScript. Collaborate with product and engineering teams, write technical designs, participate in code reviews and on-call rotations, resolve scalability and performance issues, optimize database access, and improve application monitoring. The role also involves knowledge sharing and potentially working with AWS, GitHub Actions, Terraform, microservices, agile methods, and Python/Django.

Build and operate cloud backend services for digital farm-management solutions. Responsibilities include designing scalable REST APIs, asynchronous workflows, Azure infrastructure with Terraform, CI/CD pipelines, production operations, automated testing, security, and reliability improvements. The role also involves architecture collaboration, code reviews, technical mentoring, and supporting cloud-native applications using Docker and Kubernetes.

Own technical direction and execution for major products and systems. Design scalable and reliable architectures, write production code, lead architecture decisions, solve complex engineering problems, and drive initiatives from concept through production. Improve engineering quality across testing, security, observability, and development practices while mentoring engineers and coordinating work across teams and products.

Leads technical direction and hands-on execution for major products and systems. Designs scalable backend, frontend, API, database, and infrastructure solutions; writes code; drives architecture decisions; solves production issues; improves engineering quality, reliability, security, testing, and observability; and mentors engineers across teams.

Lead and manage a cross-functional engineering team to deliver and scale customer-facing products. Own architecture, delivery, reliability, observability, and production outcomes. Coach engineers, run reviews, improve processes and tooling, and drive technical decisions across frontend, backend, APIs, databases, integrations, and infrastructure.

Lead and manage a cross-functional engineering team to deliver reliable, scalable wealth-management products. Drive architecture, code quality, observability, incident response, and engineering culture while coaching engineers and improving processes to increase delivery speed and reliability.

Lead and manage a cross-functional engineering team to design, build, and operate production systems. Own technical architecture, delivery, reliability, and processes. Coach engineers, run reviews, resolve incidents, and drive product outcomes while balancing speed, scalability, and quality.

Build and own event-driven microservices for M-KOPA Mobility’s electric-mobility financing platform. Responsibilities include designing C#/.NET backend solutions, managing production systems, applying DevOps and infrastructure-as-code practices, implementing automated testing and continuous delivery, and using observability tools such as Prometheus and Grafana. The role involves collaborating across global teams, contributing to architecture decisions, monitoring services, and leveraging AI coding tools such as Claude Code.

Design, implement, and evolve complex backend capabilities for GitLab’s global DevSecOps platform. Drive architecture and technical direction, improve quality, security, availability, performance, and operational readiness, and participate in incident response. Mentor engineers, lead through technical influence, collaborate asynchronously across product and infrastructure teams, and integrate reliable agentic AI systems into production engineering workflows.

Build scalable backend services, APIs, microservices, and event-driven solutions supporting personalization, recommendations, search, and AI-driven consumer experiences. Integrate AI/ML capabilities, develop React components, implement search using Elasticsearch or OpenSearch, and work with Kafka, databases, Redis, and cloud-native architectures. Ensure systems are secure, observable, resilient, and low latency while collaborating with AI/ML, data, and engineering teams.

Build and operate scalable backend APIs, microservices, and integration services powering personalization, recommendations, search, and AI-driven consumer experiences. Own features from design through deployment, monitoring, and support. Collaborate with AI/ML and data engineering teams, improve service performance and reliability, contribute to system design and engineering standards, and mentor junior engineers.

Owns global technical recruiting for AI/ML, software engineering, infrastructure, web, and mobile teams. Responsibilities include developing recruiting strategy, leading critical searches, partnering with engineering leadership, setting hiring standards, building and coaching a technical recruiting team, improving recruiting processes through data and market intelligence, and expanding talent networks across the US, Europe, and Asia.

Designs, builds, and operates scalable backend services, APIs, microservices, and event-driven systems supporting personalization, recommendations, search, and AI-driven consumer experiences. Partners with AI/ML, data, product, and engineering teams; integrates search and generative AI capabilities; improves performance, reliability, observability, security, and operational excellence. Leads technical delivery, mentors engineers, contributes to architecture reviews, and promotes engineering best practices.

Designs, builds, operates, tests, deploys, monitors, and supports backend services powering an enterprise AI platform. Responsibilities include AI gateway and orchestration services, APIs, multi-tenancy, entitlements, metering, quotas, integrations, governed data access, reliability engineering, and platform service ownership. The role requires designing resilient distributed systems and collaborating effectively in a client-facing consulting environment.

Design, develop, test, and maintain scalable backend applications and integrations. Replace a critical legacy system with a modern technology stack, troubleshoot technical issues, improve system resilience, support releases and deployments, and maintain documentation. Implement automated testing, continuous integration, and code reviews while guiding colleagues and applying systems thinking to solve complex problems.

Build and maintain payments infrastructure, including usage tracking, pricing, billing, payment providers, and stream-processing services. Collaborate with Finance, Tax, Growth, Sales, and engineering teams to support compliance, reporting, experiments, and customer payments. Plan migrations, debug complex production billing issues, and safely evolve live systems handling money. Requires Python expertise, backend development experience, software and system design knowledge, testing and security fundamentals, and strong problem-solving ability.

Build and operate core platform systems for users, workspaces, permissions, APIs, authentication, and resource management. Deliver full-stack features with a backend focus, including admin and settings interfaces. Scope work within large existing systems, plan migrations, manage safe rollouts, debug production issues, and collaborate across product and engineering teams. Candidates need strong Python and backend development expertise, software and system design knowledge, testing and security fundamentals, and the ability to navigate ambiguity.

Own a greenfield workflow for distributing Studio video projects across languages and aspect ratios. Design complex data-heavy backend systems, define requirements through RFCs, pressure-test data structures, and lead projects from inception through launch with minimal supervision. The role requires product judgment, enterprise-grade usage and account reporting expertise, and backend generalist capabilities. Media or video-processing pipeline experience is a bonus.

Build and review end-to-end product features while leading backend and platform architecture. Own data models, PostgreSQL schemas, migrations, third-party integrations, CI/CD, infrastructure, monitoring, security, privacy, and outage response. Collaborate across product, design, marketing, and data teams, and help develop AI-assisted coding workflows. This individual contributor role requires strong backend depth, startup production ownership, technical communication, and a willingness to solve varied problems across web and mobile surfaces.

Develop Rust software for managing and adapting cloud resources in Kubernetes environments. Collaborate on architecture, infrastructure, and feature design while debugging distributed systems and engaging directly with users. The role requires production Rust experience, cloud-native infrastructure knowledge, and familiarity with datastores, message brokers, and GitOps tooling. Experience with developer tools, Kubernetes operators, or DevOps platforms is preferred.