Top Software Engineer Jobs in Belfast

As a Software Engineer II at Affirm, you will develop backend systems, collaborate with product teams, and support operations, ensuring timely project delivery while fostering team engagement and growth.

Develop and maintain high-volume exchange connectivity software, work within an agile team, write efficient code, and mentor team members.

The Senior Software Engineer will design and build backend services for health data, improve reliability, and deliver robust solutions to enhance patient care.

The Software Engineer will build customer-facing products for healthcare, focusing on full-stack feature development and user experience, while engaging with customers and iterating on the product based on feedback.

Seeking a Senior Software Engineer for designing, developing, and maintaining software solutions; focusing on billing platforms and collaboration across teams.

Develop and maintain the SystemOperations application suite and own platform infrastructure for OT/IT environments. Implement IAM, device credential workflows, MQTT optimization, containerized deployments, GraphQL/SQL services, and Angular components while ensuring security and IEC-62443 compliance.

Develop and maintain SystemOperations applications (NestJS, Angular, GraphQL, SQL, MQTT). Own and improve CI/CD pipelines, release automation, tooling (GitHub, Atlassian, Nexus, SonarQube), environment administration, and observability while ensuring IEC-62443 security alignment and cross-functional collaboration.

The Senior Software Engineer will develop and maintain backend systems for Apex's Margin product, focusing on scalability, performance, and collaboration with cross-functional teams. Responsibilities include backend development, microservices engineering, API design, and mentorship of junior engineers, ensuring secure and efficient solutions for financial systems.

Citi seeks a Senior Software Engineer (Java) to design and develop complex, high-performance systems for fixed income trade processing, utilizing Java and Spring technologies.

As a Software Engineer Intern, you'll develop innovative solutions, gain exposure to the software development lifecycle, and collaborate in an Agile environment at Visa.

Develop, test and maintain modern responsive web applications for client onboarding. Collaborate with stakeholders, QA and ops to automate workflows, ensure regulatory compliance, design scalable API-driven platforms, and support production systems with DevOps and cloud practices.

The Senior Programmer Analyst will lead development using modern software engineering and DevOps practices, requiring extensive Java and Go expertise, along with fostering collaborative developer culture.

Design and implement billing systems while optimizing performance and mentoring engineering teams. Collaborate with finance and compliance to translate business needs into technical solutions.

Join Citi as a Python Software Engineer focused on Generative AI to design and develop production-grade AI solutions for Markets, collaborating with cross-functional teams to drive innovation.

We are seeking a collaborative Backend Engineer with Java expertise to design, build, and maintain backend services, focusing on operational excellence and system reliability. Responsibilities include architecture, automation, and supporting production environments in a multi-cloud setting.

Develop and optimize incident response capabilities, review logging setups, benchmark cloud performance, manage security configurations, and implement infrastructure as code with Terraform and Cloudformation. Collaborate with product teams to support IAM needs.

The Backend Software Engineer will manage the lifecycle of short-term projects, perform reliability analysis on applications, and interface with teams to deliver features.

The Frontend Software Engineer develops and enhances user interfaces using React and TypeScript, collaborating on architectural decisions and improving system performance.

The Senior Software Engineer II on the Sustainability team develops scalable software solutions for vehicle telematics, focusing on efficiency and environmental benefits. Responsibilities include leading technical discussions, collaborating on design, shipping features, and maintaining production systems while promoting company values.

The Software Developer will collaborate on new software applications using JavaScript and AgilePoint, providing support, documentation, and managing enhancements.

The Test System Software Engineer will develop and maintain automated test systems, troubleshoot test failures, and improve production processes while collaborating with multiple engineering teams.

Responsible for analyzing software designs for security issues, implementing security testing, vulnerability management, and ensuring compliance in the SDLC process.

As a Software Engineer, you will build features, write maintainable Roblox Lua code, collaborate with teams, and enhance gameplay for millions of players.

Responsibilities include building and maintaining backend services for distributed applications, requiring functional programming with Scala and TypeScript, alongside client interactions.

The Software Engineer will develop features end-to-end in a Ruby on Rails application, collaborating with technical and clinical teams while maintaining a focus on user outcomes and code quality.