Top Software Engineer Jobs in Belfast

Design, build, and operate high-performance platform services for SailPoint’s Identity Security Cloud. Develop Golang microservices, Angular and TypeScript features, automated tests, and AWS-based distributed architectures. Collaborate with data scientists on AI-driven capabilities, optimize low-latency services and databases, improve CI/CD pipelines, participate in a 24x7 on-call rotation, and contribute to technical design, mentoring, and platform strategy.

Leads the architecture, implementation, security, scalability, and operation of enterprise identity and access management platforms. Serves as the technical authority for authentication, authorization, federation, and identity lifecycle management. Provides architectural guidance across teams, establishes engineering standards, mentors engineers, evaluates technologies, and improves platform observability and reliability. The role also advances AI-assisted development practices and long-term engineering strategy for secure, scalable SaaS services.

Build and maintain Ruby on Rails backend features for vulnerability management, including security dashboards, reports, and ingestion pipelines. Improve system performance, reliability, and scalability; collaborate across backend, frontend, product, design, and security teams; review code; address technical debt; and participate in on-call rotations. The role requires relational database experience, distributed-team collaboration, technical problem-solving, and contributions across the stack when needed.

Build and maintain Samsara's Cloud Governance Platform across AWS and GCP, focusing on cloud IAM guardrails, automated compliance controls, and software supply-chain security. Implement SAST/DAST and secure CI/CD patterns, design scalable, reliable systems, translate regulatory requirements into automated controls, collaborate cross-functionally, and own components end-to-end while mentoring teammates and shaping the roadmap.

Collaborate on designing, developing, testing, debugging, and maintaining software applications. Write efficient, documented code, participate in code reviews, contribute software ideas, and learn development tools, frameworks, methodologies, and industry practices alongside senior developers.

Develop and maintain backend services and REST APIs supporting AI assistants. Integrate large language models, enterprise data, APIs, and workflow automation into customer-facing products. Contribute to AI features such as summaries, knowledge assistance, search, task automation, and agent guidance. Write tested, maintainable code; troubleshoot services and integrations; participate in reviews; and collaborate with product, UX, data, security, QA, and platform teams.

Join the International Accelerator full-stack team to design, build, and operate Direct-to-Consumer products across international markets. Break projects into tasks, collaborate with PM/design/analytics, build and monitor APIs and web apps, support on-call and availability, participate in hiring and team growth, and write clear, well-tested, maintainable code.

Develop backend software in C# .NET within an agile delivery team. Responsibilities include system design, coding, technical documentation, automated testing, collaboration with product managers and test engineers, and maintaining high-quality mission-critical software. The role is remote with occasional travel and supports a UK emergency call-taking and dispatch platform.

Build and provide technical direction for Mission Control, an enterprise interface and API platform for deploying, monitoring, and controlling AI security agents. Develop React and TypeScript full-stack applications, integrate designs, define API contracts, automate deployments and testing, and support cloud-native systems. Collaborate across product and engineering teams, mentor engineers, manage stakeholders, improve accessibility and front-end security, and participate in on-call rotations.

Designs and develops components of Satori, Proofpoint’s enterprise AI agent platform. Responsibilities include building agent runtimes and SDKs, creating evaluation suites, safety checks, telemetry, and authentication controls, transforming integrations into reusable platform capabilities, and supporting production-grade microservices. The role involves debugging distributed systems, cloud-native deployment automation, architectural collaboration, mentoring, and participation in an on-call rotation.

Build features and production services for Proofpoint’s Satori enterprise AI agent platform. Implement agent runtimes and SDK components, contribute to evaluation suites, safety checks, telemetry, authentication, release readiness, and rollback processes. Collaborate with senior engineers, debug services, support cloud-native microservices, ship production code, and participate in an on-call rotation.

Architect and deliver resilient, high-performance cloud services for SailPoint’s identity platform using Golang and Angular. Design synchronous and event-driven microservices, build scalable SaaS features, improve performance and reliability, conduct architecture and code reviews, and mentor engineers. The role includes collaboration with product and architecture teams, participation in a 24x7 on-call rotation, and leadership across Policy Engine and agentic identity initiatives.

Design, build, deploy, and operate full-stack microservices for SailPoint’s Policy Engine. Develop scalable distributed systems using Golang and Angular, write unit and integration tests, debug and profile complex services, participate in on-call support, lead design reviews, mentor engineers, and contribute to technical roadmaps and architectural initiatives.

This is a placeholder Software Engineer posting for Westpac New Zealand. The role description does not specify software development responsibilities, required technologies, qualifications, experience, or other technical requirements. The position offers hybrid work in Britomart, Auckland, professional development, banking benefits, wellbeing leave, and other employee perks.

Build AI-powered features that automate data-driven slide decks and documents. Develop production LLM solutions using LangChain, RAG, LlamaIndex, and generative AI technologies; improve system performance and reliability; and collaborate with designers and engineers. Responsibilities span AI insights, content generation, integrations, optimization, and potentially LLM agents. The role requires advanced Python, machine learning and NLP expertise, and experience building and fine-tuning LLMs in production.

Contract software engineering role for a remote Europe-based engineer building scalable, resilient backend products with client teams. Responsibilities include backend development in Go, API and SaaS platform development, cloud infrastructure, distributed systems, containerized deployment with Docker and Kubernetes, testing with TDD, and performance optimization. The role also involves technical communication, collaborative problem-solving, and thoughtful use of AI tools.

Own and evolve GitLab’s authorization systems across its Ruby on Rails monolith and next-generation Rust policy engine. Design fine-grained permissions for users, tokens, roles, and AI agents; secure GraphQL and REST APIs; lead feature-flagged rollouts and migrations; improve performance and reliability; and collaborate across authentication, platform, AI, and modular-service teams in a distributed asynchronous environment.

Develop and support scalable Java and Spring Boot backend microservices powering omnichannel inventory availability, order promising, allocation, fulfilment, and post-purchase experiences. Build event-driven processing with Kafka, integrate OMS, WMS, ERP, commerce, and fulfilment platforms, and ensure services are secure, observable, reliable, and performant. Own features from design through production, write tested code, participate in reviews, troubleshoot production issues, and improve operational efficiency.

Designs, automates, and executes functional, integration, API, contract, regression, concurrency, and performance tests for inventory, order promising, sourcing, and fulfillment platforms. Investigates defects, validates fixes, maintains regression coverage, integrates quality tests into CI/CD pipelines, and supports release readiness. The role collaborates with product and engineering teams to validate distributed commerce systems, integrations, business rules, data consistency, scalability, resilience, and consumer-impacting workflows.

Design and develop scalable, secure frontend web applications for connected embedded systems. Lead frontend architecture, collaborate with backend/embedded teams, implement device provisioning, telemetry visualization, and remote management UIs. Optimize performance, accessibility, and maintainability; mentor engineers, participate in reviews, and drive frontend best practices.

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.

The Software Engineer will design, develop, and maintain backend services and APIs for Speechify, ensuring they meet business and scalability requirements. The role involves collaboration on B2B solutions and aligning backend architecture with product strategy.

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, 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.