Top Software Engineer 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.

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.

Develop and support Java-based compliance and supervision technology for global markets. Design scalable, secure, resilient APIs, event-driven microservices, and cloud-native solutions integrating vendor platforms and enterprise systems. Collaborate with Compliance, Risk, Data, Architecture, Security, and business stakeholders. Embed auditability, monitoring, entitlement controls, and regulatory evidence into systems while supporting Agile delivery, audits, remediation, and operational needs.

Design, develop, deliver, and support Java-based compliance and communications surveillance technology for global markets. Build API-first, event-driven, microservices, and cloud-native solutions while integrating vendor platforms and enterprise data services. Ensure scalability, security, resiliency, auditability, and regulatory alignment. Collaborate with Compliance, Risk, Data, product, architecture, infrastructure, security, vendors, and business stakeholders using Agile and continuous delivery practices.

Designs and delivers customer-facing innovation prototypes combining AI/ML, IoT, real-time data, APIs, analytics, and Digital Twin technologies. Builds streaming and batch data pipelines, telemetry integrations, scalable REST and gRPC services, 3D/4D visualizations, and AI-enabled solutions. Deploys applications with Docker and Kubernetes while supporting observability, CI/CD, documentation, and customer presentations.

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.

Develop and maintain Tether’s peer-to-peer stack and modular ecosystem of more than 1,500 public npm modules. Build production-scale Node.js applications, create reusable packages, write maintainable code, and perform testing and debugging. The role also involves expanding distributed systems and networking capabilities while collaborating effectively in a remote, globally distributed team. Experience with native Node.js extensions, network optimization, advanced networking, and open-source P2P or decentralized technology is preferred.

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.

Build and operate production backend services supporting Supabase AI products, including the MCP server. Responsibilities include service architecture, deployments, scaling, authentication and authorization, observability, reliability targets, on-call incident response, rate limiting, capacity management, and API evolution. The role requires strong TypeScript or Go skills, production backend experience, distributed-systems debugging, and collaboration with Platform and SRE teams in a fully remote environment.

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.

Leads platform engineering initiatives delivering scalable cloud-native systems and AI-driven applications. Responsibilities include full software lifecycle execution, system design reviews, infrastructure and tooling development, ML framework integration, monitoring, and maintenance. The role mentors engineers, influences technical direction, collaborates cross-functionally on requirements, and drives continuous improvement across distributed systems and platform capabilities.

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.

Build and maintain full-stack web products across frontend, backend, databases, DevOps, analytics, and third-party integrations. The engineer will implement features, fix bugs, improve infrastructure, monitoring, deployments, testing, and developer experience, and participate in on-call support. The role requires collaboration with product teams, proactive technical ownership, reliable production code, analytics-informed iteration, and fluency with AI coding tools. Senior candidates may additionally own architecture, technical strategy, and major projects.

Build robust software solutions for Citi’s margin and collateral technology platform. Develop Java, React, and/or Python applications, RESTful APIs, and distributed systems while applying TDD, clean code, data structures, algorithms, and SQL. Collaborate with product teams and users, manage multiple priorities, and contribute to modernizing global finance technology. Experience with financial services, AWS, Kafka, Kubernetes, S3, DynamoDB, MongoDB, or other NoSQL databases is beneficial.

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.

Build and maintain Python backend services, APIs, data models, and database queries for the TimeKeeper platform. Develop reliable, performant features with web and mobile teams, write automated tests, troubleshoot issues, review code, and contribute to AWS, Terraform, and Redis infrastructure. The role requires strong backend experience, collaboration, prioritization, and willingness to learn new technologies.

Develop and maintain full-stack web applications using C#, ASP.NET Core, .NET 8, Angular, Blazor, and related technologies. Responsibilities include building front-end interfaces, server-side services, REST APIs, database integrations, testing, debugging, documentation, code reviews, and production deployment. The role collaborates with designers, product managers, and QA in an Agile environment while contributing to continuous technical improvements.

Build end-to-end product features for Codility’s technical hiring platform, with a primary focus on Python backend development using Django or FastAPI. Contribute to React frontend, AWS infrastructure, scalable and observable systems, and practical AI/LLM integrations. Collaborate with Product, Design, and Engineering in a remote distributed team while owning projects and making pragmatic technical decisions.

Designs and maintains high-performance JVM applications for digital-asset trading and settlement. Responsibilities include developing microservices, REST APIs, WebSockets, SQL and NoSQL data schemas, Kafka messaging, Redis caching, and cloud-native AWS solutions. The engineer collaborates with business stakeholders, DevOps, and frontend teams; supports GitLab CI/CD; and implements observability, structured logging, scalability, availability, and data integrity across a regulated financial platform.

Develops production-ready SaaS features and customer-facing AI experiences across maintenance, asset intelligence, monitoring, compliance, and operational workflows. Responsibilities include backend services, APIs, distributed systems, enterprise integrations, telemetry processing, event-driven architectures, automated testing, CI/CD, observability, secure coding, and AI-assisted development. The role independently manages work through the full SDLC, validates AI-generated software, contributes to architecture and engineering improvements, and mentors junior engineers while collaborating across globally distributed teams.

Develop custom customer integrations and provide Bubble.io guidance. Build and maintain Salesforce, HubSpot, and other CRM integrations; manipulate data with Python and Pandas; design AWS Lambda microservices; support client onboarding and collaborate with the development team to improve the platform.

Design, develop, test, and maintain scalable software applications and systems. Write high-quality code, solve complex technical problems, collaborate with product and engineering teams, participate in code reviews and debugging, contribute to system architecture, and improve engineering processes. The role requires strong software fundamentals, production-scale experience, and familiarity with Databricks, distributed systems, and cloud infrastructure.

Build and scale Supabase Storage across client libraries, CLI, CDN, storage servers, and deployment infrastructure. Responsibilities include improving upload and download performance, asset optimization, edge networking, caching, observability, reliability, APIs, developer tools, and the storage explorer. The role also involves PostgreSQL and distributed-systems performance tuning, infrastructure operations, escalated support resolution, and end-to-end project ownership in an asynchronous, remote, open-source environment.

Designs, develops, tests, operates, and supports secure, reliable software solutions. Responsibilities include translating requirements into technical designs, building full-stack or cloud software, reviewing AI-assisted code, creating automated tests, participating in code and design reviews, documenting systems, and improving engineering practices. Specialisms include backend, frontend, full-stack, DevOps, and cloud engineering, using technologies such as Python, JavaScript, AWS, Terraform, and Kubernetes.