Top Software Engineer Jobs in Belfast

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.

The Software Engineer II role involves developing, maintaining software solutions, performing data analysis, code review, and collaborating with cross-functional teams while utilizing automated testing and CI/CD methodologies.

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 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.

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.

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.

As a Software Engineer, you'll develop high-quality software applications, collaborate with teams, utilize modern technologies, and support users globally.

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 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.

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.

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.

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.

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.

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.

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.