Top Software Engineer Jobs in Belfast

The Software Engineer II will design and optimize financial technology solutions, collaborate with cross-functional teams, and maintain robust code while ensuring compliance with industry standards.

As a Software Engineer II, you will design, build, and optimize billing services on the Apex Ascend platform using languages like Java and Python. Responsibilities include developing microservices, testing, debugging, and collaborating with teams to enhance billing applications.

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 Sr Software Engineer will develop and operate compliance applications and services on a cloud platform, focusing on scalability and reliability while collaborating in a fast-paced environment.

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

Senior engineer responsible for end-to-end delivery of scalable, reliable features. Design and implement Python-based services, work with Kubernetes and cloud platforms, contribute to architecture, champion testing/monitoring, and mentor junior engineers while partnering with product and UX teams to meet customer needs.

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.

Build and evolve device and service monitoring for OT systems: design data ingestion, time-series structures, dashboards, alerting, logging and audit trails aligned with IEC-62443; develop backend services with NestJS, contribute to Angular dashboards, integrate devices, improve data quality, and enable ML-ready analytics for anomaly detection and predictive insights.

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

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.

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

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.

Design and develop secure payment gateway software using object-oriented languages (primarily C#). Implement secure end-to-end transactions, integrate with partners via SOAP/JSON, apply cryptographic techniques and hardware security modules, participate in full SDLC, troubleshoot defects, and improve technical methodologies within a collaborative team.

The Senior Software Engineer will develop systems for compliance in driving operations, work with diverse technologies, and mentor junior team members.

Lead the architecture of the developer ecosystem at Samsara, focusing on large-scale data streaming systems, serverless computing, and API management. Drive technical vision and mentorship for engineering teams, ensuring consistency and scalability in solutions related to transport, construction, and utilities.

Lead architectural development across core products, focusing on operational excellence and innovation while driving collaboration and growth within teams.

Samsara is seeking a Senior Software Engineer to lead the design and development of vehicle telematics solutions, focusing on technical design, data modeling, and full-stack customer solutions involving ML and AI.

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

The Senior Software Engineer will design, develop, and maintain software solutions, focusing on customer identity verification and data analysis while collaborating with cross-functional teams to deliver robust products.

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.

The Senior Software Engineer will develop backend systems and Market Data APIs, focusing on high-performance solutions in a fast-paced environment, utilizing cloud-native technologies.