Top Tech Jobs & Startup Jobs in Belfast

Develop and support complex, distributed Java applications for fixed-income trade processing. Responsibilities include requirements analysis, system design, coding, testing, implementation, operational support, risk assessment, security improvements, and stakeholder consultation. The role requires expertise in Java and Spring Boot, financial services—particularly securities finance transactions—and the ability to work independently while mentoring junior analysts.

Develop and maintain Java-based BDD test automation using Cucumber, SQL validation, and API testing. Create test plans, cases, estimates, regression suites, and project artifacts; identify and track defects; investigate production issues; and collaborate with development, business, and support teams. Help optimize QA processes, apply testing methodologies, and ensure software quality before client delivery.

Engineer automated container security solutions, harden internal platforms, improve container image scanning and the secure development lifecycle, and operate scalable enterprise security platforms. The role involves architecture, implementation, reliability, and cross-functional collaboration with platform, DevOps, engineering, operations, and developer teams.

Lead development and enhancement of Citi's trade cost analytics platform. Design trade and cost analytics, reconciliation processes, and fee calculations. Partner with front/middle office, operations, and technology to gather requirements, translate business needs into SDLC deliverables, and deliver reporting and platform improvements to increase transparency and accuracy.

Lead global stability governance for Citi’s production management organization. Establish executive reporting, KPI and SLO frameworks, analyze systemic technology risks, oversee application improvement programs, and drive corrective initiatives. Govern stability artifacts, automate reporting with AI and intelligent automation, manage high-priority initiatives, and provide operational leadership. The role requires executive influence, advanced quantitative analysis, data governance, production support or IT governance experience, and senior leadership within banking or financial services.

Design, develop, and maintain low-latency electronic trading systems for equities execution. Build algorithmic trading, smart order routing, market data, exchange connectivity, monitoring, reconciliation, and recovery solutions. Collaborate with traders, quantitative researchers, product teams, infrastructure, support, and QA. Improve testing, performance, CI/CD, Agile delivery, and platform resiliency while contributing technical leadership in a globally distributed environment.

Owns and evolves talent planning policies, governance frameworks, controls, and records management. Advises senior HR stakeholders, coordinates key-role identification and HR-system tracking, and develops resources for annual talent reviews. Ensures processes meet internal control and regulatory expectations while supporting audit requests, stakeholder communication, and workforce planning activities.

Develop and enhance Citi’s low-latency Global Equities Market Data platform. Responsibilities include designing new functionality, supporting deployed applications, coordinating exchange-mandated changes, troubleshooting production issues with traders and support teams, and improving electronic trading capabilities. The role requires strong Java or C++ expertise, network protocol knowledge, and teamwork in a fast-paced financial technology environment. Experience with microservices, ultra-low-latency systems, multicast networking, algorithmic trading, KDB, and equities products is beneficial.

Develop and maintain Java-based market access gateway systems connecting Citi’s trading infrastructure with EMEA exchanges. Responsibilities include application development, system enhancements, support and maintenance, vulnerability analysis, testing, debugging, troubleshooting, and stakeholder consultation. The role also provides technical guidance to junior analysts and requires independent problem-solving in a financial services environment. Desirable experience includes containerization, DevOps tools, Unix and shell scripting, and low-latency coding principles.

Develop enterprise-scale Python applications for Citi’s Wholesale Credit Risk Technology team. Build solutions using Python, FastAPI, Java, MCP, LLMs, and RAG architecture; collaborate with onshore, offshore, and matrix teams; manage CI/CD pipelines and Kubernetes deployments; investigate bugs, resolve complex issues, provide production support, and communicate progress to project leadership.