Top Software Engineer Jobs in Belfast

Student placement software engineering role developing Magnite’s advertising platform. Responsibilities include software development, quality assurance, test automation, deployment, and solving complex technical problems with experienced engineering teams. The role provides mentorship and exposure to a broad technology stack, including Java, Rust, Scala, JavaScript, Python, C++, SQL, Cassandra, Druid, Hadoop, and Kafka.

Software engineering student placement developing and testing a complex advertising technology platform. The role provides hands-on experience in software development, quality assurance, automation, deployment, and modern programming technologies. Students collaborate with experienced engineers, contribute production code, solve technical problems, and receive mentorship and professional development. The position is hybrid in Belfast and restricted to current Ulster University STEM students participating in the 2027 placement program.

Software engineering intern supporting the Platform Engines group and Policy Engine for SailPoint’s cloud identity security platform. Responsibilities include developing software, procedures, and test solutions; collaborating with software and QA engineers, technical writers, and product managers; and working in Agile teams. The intern will gain exposure to cloud and software technologies including Golang, Angular, AWS, Docker, Kafka, Kubernetes, REST, SQL, and Temporal.

Build and operate production services for Proofpoint’s Microsoft 365 Outlook add-in and Adaptive Email Data Loss Prevention platform. Improve scalability, reliability, security, and user experience; work with sensitive data; ship continuously through CI/CD; and use product and production data to guide development. The role requires production Python, AWS, database, container, infrastructure-as-code, and security experience, with JavaScript/React and large-scale infrastructure experience preferred.

Build and operate reliable, scalable platform capabilities for Walmart Data Ventures. Responsibilities include developing AI and GenAI-powered tooling, agentic services, automation, observability, self-healing systems, and incident-response solutions. The role owns service reliability, scalability, SLOs, alerting, distributed tracing, deployment automation, production monitoring, and debugging while establishing SRE standards and improving customer support through automation.

Build AI- and GenAI-powered platform capabilities, automation, observability, and self-healing systems for Walmart Data Ventures. Own service reliability, scalability, SLOs, incident response, monitoring, and deployment practices across cloud-native distributed systems. Establish SRE standards, reduce operational toil and incident volume, improve customer support through intelligent automation, and drive the full software development lifecycle, including coding, testing, CI/CD, deployment, monitoring, and debugging.

Lead design and delivery of scalable, cloud-native platform capabilities and ML-integrated applications. Oversee full SDLC, architecture, reliability, CI/CD, observability, and incident response. Provide technical leadership, mentor engineers, collaborate with stakeholders, and drive continuous improvement to support high-availability distributed fulfillment systems.

Staff Software Engineer responsible for troubleshooting and optimizing mission-critical applications, Kubernetes infrastructure, databases, and cloud-native systems. The role develops software, automation, AI-assisted operational tools, monitoring, and CI/CD improvements; resolves production incidents; performs database tuning and root-cause analysis; and drives reliability, scalability, and operational excellence across enterprise platforms.

Supports a business-critical warehouse management system in a 24x7 environment. Responsibilities include application maintenance, upgrades, incident resolution, infrastructure and database administration, SQL performance optimization, monitoring, integrations, change and release management, vendor coordination, SOX compliance, disaster recovery testing, documentation, and continuous service improvement.

Provides 24x7 production and application support for a business-critical warehouse management system. Responsibilities include monitoring, incident resolution, troubleshooting, SQL and database support, application maintenance, upgrades, release testing, infrastructure coordination, documentation, SOX compliance, and disaster recovery testing. The role collaborates with infrastructure, networking, cybersecurity, SAP, middleware, database, and vendor teams to maintain application availability, security, and performance.

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.

Provides technical leadership for site reliability engineering across Walmart Data Ventures. Designs scalable automation, observability, SLO tooling, and AI-powered agents for incident triage, root cause analysis, workflow automation, self-healing, and customer support. Establishes reliability standards, improves scalability and resilience, reduces incidents and operational toil, and advances CI/CD, testing, monitoring, debugging, and production readiness through cross-functional engineering influence.

Leads the architecture and delivery of GitLab’s static analysis engine and evaluation tooling. Owns program modeling, vulnerability detection quality, SAST rules, AI-assisted development guardrails, and benchmark validation. Sets technical direction, mentors engineers, coordinates complex initiatives, contributes to research and open source, and participates in on-call rotations. The role requires deep program analysis, application security, systems programming, performance optimization, containerized CI/CD, and experience building trustworthy LLM tooling.

Develop and maintain cross-platform consumer mobile applications using React Native, TypeScript, and JavaScript. Build reusable components, integrate REST and GraphQL APIs, implement state management, optimize performance, troubleshoot crashes, support testing and CI/CD releases, and apply accessibility and usability principles. Collaborate with product, design, QA, and engineering teams in Agile delivery environments while contributing to code reviews, experiments, and engineering standards.

Build and maintain full-stack features for secure, high-volume fintech and cryptocurrency transactions. Develop Golang and Java backend services, Node.js and TypeScript APIs, and React/Next.js applications. Integrate third-party systems, implement OAuth 2.0 authentication, work with microservices, and ensure security, performance, reliability, and observability. Contribute to architecture discussions, code reviews, technical documentation, and end-to-end feature ownership in a fully remote environment.

Design, build, operate, and maintain scalable distributed systems supporting CrowdStrike’s Intelligence pipelines. Gather requirements from analysts, develop processing and data integration systems, make autonomous architecture decisions, maintain Go and Python codebases, deploy production services, document solutions, train users, and communicate technical details effectively. The role requires independent execution in a geographically distributed team and includes opportunities to work with cloud platforms, APIs, web interfaces, malware analysis, and AI technologies.

Develop and lead full-stack user interface work for Elastic Fleet and Streams using TypeScript, React, and Node.js. Own complex projects end to end, make architecture and system-design decisions, establish coding standards, conduct code reviews, improve testing and deployment, and collaborate asynchronously with designers, product managers, and distributed engineering teams. Build scalable interfaces for observability, log ingestion, and real-time data workflows while mentoring teammates and promoting secure, maintainable software.

Software Developer Interns collaborate on designing, developing, testing, debugging, and maintaining software applications. They write efficient, documented code, participate in code reviews and brainstorming, resolve defects, and learn modern tools, frameworks, programming languages, and development methodologies while working with experienced developers.

Designs, builds, deploys, and operates production-grade AI applications, agents, services, integrations, and workflows. Leads architecture, coding standards, testing, experimentation, reliability, observability, security, compliance, and operational readiness. Translates business requirements into scalable technical solutions, mentors engineers, coordinates across teams, and develops reusable engineering patterns. Participates in on-call support, incident response, postmortems, and continuous improvement while using AI-assisted development tools to accelerate delivery.

Develop and maintain Elasticsearch’s Inference API and plugin framework, integrating internal and external AI providers. Responsibilities include API and protocol design, streaming, asynchronous execution, rate limiting, configuration, billing integration, error handling, open-source contribution reviews, incident response, and comprehensive unit, REST, and rolling-upgrade testing. The role requires advanced Java expertise, concurrency and parallelism knowledge, API design skills, cross-functional collaboration, and autonomous work in a distributed team.

Graduate software engineers will develop open-source and commercial software across the Linux stack, from firmware, kernels, and drivers to desktop applications, containers, clouds, and Kubernetes. Responsibilities include writing resilient, performant code, contributing to product roadmaps, engaging with users and open-source communities, addressing customer issues, and developing secure software. The role is globally remote with twice-yearly international team sprints and emphasizes mentorship, collaboration, and continuous technical growth.

Work on the Core team building and maintaining APIs and services for baskets, orders, checkout, promotions, and capacity. Implement small-to-medium features, write tests, participate in code reviews and on-call rotations, collaborate with stakeholders, and use version control and AI coding tools to improve reliability and scalability.

Build end-to-end software solutions and integrations for strategic customers. Partner closely with customer engineers and executives, design technical architectures and product features, apply ElevenLabs technologies, and solve complex problems through hands-on coding and implementation. The role requires strong Python and software development expertise, API integration knowledge, clear communication, and regular travel to customer sites.

Build and maintain customer-facing features, internal tools, and platform improvements for a Rails-based self-storage operating system. Responsibilities include full feature ownership, collaborating with Product, writing tests, debugging production issues, improving stability and performance, monitoring applications, participating in code reviews, and contributing to technical discussions. The role requires independent work on defined tasks and collaboration within a small product engineering team.

Build and maintain BrandX software, including dashboard features, billing systems, authentication, and AI Assist capabilities. Own small-to-medium features, write and review code, create tests, support CI/CD and deployments, troubleshoot production issues, participate in team ceremonies, and join the on-call rotation. Collaborate with distributed teams while using AI coding tools such as Claude Code and GitHub Copilot.