Top Software Engineer Jobs in Belfast

Develop cloud-based Java microservices for CC Responder using agile Scrum practices. Responsibilities include full software development lifecycle ownership, system integration, testing, documentation, customer support, mentoring junior engineers, code reviews, architectural guidance, and establishing code quality standards.

The Senior SDET at BR-DGE will design and maintain automation frameworks, partner with development teams to enhance quality, optimize CI/CD pipelines, and drive engineering maturity by coaching junior staff.

Set long-term technical strategy for backend identity systems, lead major distributed-system initiatives, ensure operational availability, establish engineering quality standards, collaborate cross-functionally, and mentor engineers. Build and launch highly available systems supporting international expansion, KYC verification, identity data management, decisioning, regulatory compliance, and global risk models.

Design and build distributed systems for a high-performance CI/CD execution platform. Responsibilities include orchestrating Supabase Branch lifecycle operations, provisioning ephemeral sandboxed environments on AWS, scheduling concurrent builds, optimizing pipelines through caching and artifact reuse, handling retries and failures, instrumenting observability, and developing configuration and infrastructure integrations. The role requires strong Go and TypeScript skills, cloud infrastructure experience, and a production operations mindset.

Build and operate high-performance backend systems and distributed services using Elixir and Phoenix. Design declarative infrastructure with Terraform, Terramate, FluxCD, Kubernetes, and Helm; manage AWS cloud workloads, cluster upgrades, GitOps workflows, observability, and databases. Collaborate with a remote engineering team on architecture, product development, debugging, reliability, and customer success.

Design, develop, test, deploy, maintain, and enhance enterprise IoT software products. Contribute to the architecture of a global multi-cloud, multi-region platform, enforce SDLC and DevSecOps practices, support CI/CD pipelines, conduct technology research and proofs of concept, and provide technical leadership, mentoring, and direction. Collaborate with partner teams to deliver scalable, secure, reliable systems that enable real-time IoT monitoring and data-driven decision-making.

Designs and delivers scalable AI-centric software for offensive security, including agentic vulnerability detection, automated penetration testing, workflow optimization, and threat intelligence. Owns features from ideation through deployment and monitoring, contributes to architecture and testing, and collaborates across teams. Requires Python or Go, AI technologies, microservices, APIs, messaging, databases, Docker, Kubernetes, and cloud experience.

Design, build, maintain, and debug services within a large-scale microservices architecture. Resolve complex distributed-system and production issues, participate in on-call rotations, communicate technical decisions, navigate ambiguity, and improve engineering practices through innovation, infrastructure migrations, technical-debt reduction, and AI-assisted development.

Build and maintain full-stack services for TP ICAP’s AWS-based Fusion Platform. Own software design, development, testing, deployment, and production support across low-latency, event-driven systems. Drive engineering improvements, architectural discussions, refactoring, estimation, and delivery within an Agile team. Develop reusable microservices using TypeScript and AWS technologies, maintain high code quality through automated testing, and mentor junior engineers. Occasional out-of-hours support may be required for production incidents.

Lead the design, development, testing, and maintenance of scalable backend software applications. Provide technical leadership through mentoring, code reviews, architectural decisions, and best-practice adoption. Collaborate with product, design, and stakeholders to define requirements, manage technical risks, and deliver secure, reliable solutions. Champion continuous integration, code quality, automated testing, data protection, and compliance while driving innovation and fostering a high-performing engineering culture.

Design, build, scale, and support reliable distributed systems integrating Proofpoint threat defense with Microsoft and Google email platforms. Develop Python services, maintain business-critical systems, ship code through CI/CD, monitor production environments, address security vulnerabilities, and process sensitive data at high volume with low latency. The role emphasizes DevOps, scalability, reliability, experimentation, and data-informed product improvements.

Own end-to-end development of automation and AI-driven systems across tenant find, property management, or payments. Responsibilities include understanding complex operational workflows, identifying automation opportunities, designing scalable architectures, collaborating with product managers, making pragmatic AI and agentic system decisions, and delivering reliable solutions from concept through production. The role requires strong product judgment, technical ownership, and the ability to improve business outcomes in a fast-changing environment.

Build and maintain production-grade iOS applications using Swift and SwiftUI, integrating AI through backend APIs. Design reliable AI interaction patterns, optimize performance and memory, support concurrency and background tasks, capture user feedback, and collaborate with backend and machine learning engineers. Maintain App Store quality, monitor production issues, and deliver responsive, stable, and efficient user experiences.

Lead the technical vision and development of Elasticsearch’s core search infrastructure, including indexing, retrieval, query execution, and relevance. Research search algorithms and data structures, contribute to Lucene, guide technical roadmaps, collaborate across teams, mentor senior engineers, and build high-performance distributed search systems. Serve as a subject-matter expert while driving projects from concept through completion.

Build and maintain scalable test automation frameworks and QAOps infrastructure for UI, API, backend, and end-to-end testing across multi-cloud environments. Integrate automation into CI/CD pipelines, analyze test and production telemetry to identify risks, support release validation and QA sign-off, and drive quality engineering best practices across distributed teams.

Design, develop, test, and maintain scalable backend applications, services, and APIs using modern engineering practices. Responsibilities include architecture and solution design, unit and integration testing, troubleshooting, code reviews, technical discussions, Agile collaboration, continuous improvement, and mentoring junior engineers. The role emphasizes performance, reliability, scalability, security, maintainability, and translating business requirements into high-quality technical solutions.

Build AI-powered product quality infrastructure for capturing, synthesizing, routing, and acting on customer feedback. Develop bug intake and triage systems, dashboards, data pipelines, analytics tooling, and integrations with ticketing, payment, CRM, and data warehouse systems. Partner with support engineers and domain specialists to improve product quality and ship internal tools quickly.

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.

The Edge Functions Engineer will evolve the Supabase Edge Runtime, implement monitoring and optimizations, manage features, and work closely with the Deno open-source teams.

Design, develop, and maintain scalable web applications using .NET backend and Angular/React frontend. Collaborate on requirements, implement RESTful APIs, optimize performance, debug, maintain documentation, support end-users, and work within CI/CD and DevOps workflows.

Design, develop, customize and integrate Microsoft Dynamics 365 CRM/CE solutions. Build entities, forms, workflows, plugins, reports and dashboards using CRM SDK, C#, JavaScript, ASP.NET and SQL. Troubleshoot issues, estimate implementation approaches, collaborate with stakeholders, document solutions, and mentor junior developers. Banking domain experience preferred.

Build and maintain backend-first features and integrations for Triptease's marketing channels. Work across the full stack (primarily backend), design scalable distributed systems, implement CI/CD on cloud platforms, collaborate closely with product teams, pair program, write tests (TDD), and contribute to squad strategy and product quality.

Build and improve Mozilla’s Add-ons platform, including Python/Django applications, automated moderation pipelines, reviewer tools, DevHub, internal developer platforms, and CI/CD systems. Establish engineering standards, observability, safe deployment practices, documentation, and incident response processes. Debug complex production systems, improve reliability, collaborate across distributed teams, mentor peers, and contribute to open-source development.

As a Senior Software Engineer, you will enhance the REDAPL platform, leading initiatives in data ingestion, processing, and supporting infrastructure-related projects while mentoring other engineers.

Leads a software development team through the full product lifecycle, including user research, product strategy, roadmap planning, application development, testing, code reviews, documentation, team performance management, budgeting, partnerships, and user support. The role also manages Agile processes, reports metrics, develops funding proposals, and participates in conferences and periodic travel.