Top Tech Jobs & Startup Jobs in Belfast

Processes and reconciles daily purchase and sale transactions across equities, fixed income, and derivatives. Reviews trade exceptions, discrepancies, settlement issues, and posting errors; coordinates with internal teams, counterparties, and clients to resolve inquiries. Maintains regulatory and SLA compliance, performs supervisory oversight, provides operational metrics, and recommends process improvements.

Supports daily administration and execution of global Total Rewards and benefits programs. Responsibilities include employee inquiry support, benefits onboarding, vendor data transmissions, process documentation, communications, open enrollment assistance, invoice tracking, data checks, and compliance reporting. The role also supports identifying AI automation opportunities and requires attention to detail, confidentiality, adaptability, and proficiency with Google Workspace, Excel, or Workday.

Develop and maintain production software for large-scale, real-time advertising systems. Responsibilities include writing tested code, addressing features and bugs, supporting production services, collaborating across teams, and contributing to system architecture and design. The role emphasizes systems programming, scalability, low-latency performance, concurrency, memory management, and reliable enterprise server applications, with opportunities to develop production Rust skills.

As a Senior Site Reliability Engineer, you'll build resilient platforms, automate processes, mentor teams, and drive changes in a cloud-based environment.

Own Keet’s vision, strategy, roadmap, and growth toward one billion users. Lead technical product decisions for peer-to-peer messaging, voice, video, synchronization, mobile and desktop distribution. Partner with engineering and cross-functional teams to run delivery, releases, testing, and post-launch iteration. Build rapid AI-assisted prototypes, present strategy to executives and the board, manage dependencies, and maintain high standards for reliability, privacy, performance, and user experience.

Own Keet’s long-term vision, strategy, growth, and execution as a private peer-to-peer messaging and calling platform. Lead product and engineering teams, manage sprint delivery and cross-functional dependencies, guide P2P architecture decisions, oversee voice/video quality, rapidly prototype with AI tools, and manage mobile and desktop releases. Present strategy to executives and the board while driving the product toward one billion users.

Conduct Level 2 transaction monitoring investigations involving complex and high-risk financial activity, including international payments, correspondent banking, sanctions evasion, and politically exposed persons. Review transaction histories, customers, ownership structures, and external intelligence; document findings; draft SAR/STR narratives; escalate significant risks; identify typologies; and support regulatory compliance, quality, productivity, and process improvement across client projects.

Design, build, debug, and maintain high-performance C++ microservices for distributed embedded systems in Linux environments. Define APIs and deployment strategies, optimize reliability and performance, contribute to CI/CD and automated testing, and participate in code reviews and architecture discussions while meeting security and quality standards.

Lead Android product development by owning major app features, shaping the Android team, improving reliability, collaborating with Product and Design, reviewing code, resolving critical issues, and managing feature releases and QA builds. The role requires strong Kotlin and Android expertise, product intuition, testing knowledge, user empathy, communication, and technical leadership in a distributed environment.

Provides academic leadership for STEM programmes, overseeing curriculum delivery, assessment, quality assurance, student engagement, progression, staffing coordination and continuous improvement. The role includes analysing student performance data, supporting teaching staff, coordinating with university partners, managing programme-level changes, and delivering up to 15 hours of teaching weekly. The postholder also contributes to academic monitoring, moderation, student support, professional development and scholarly activities.

Provides academic leadership for Business programmes, overseeing curriculum, teaching, assessment, quality assurance, student engagement, progression and continuous improvement. Coordinates teaching teams, monitors student performance data, supports staff development, liaises with university and internal stakeholders, manages programme delivery and academic standards, and teaches up to 15 hours weekly.

Build, evaluate, prototype, and deploy production AI applications across Citi’s business lines. Integrate LLMs and agentic systems with enterprise APIs, data pipelines, and lightweight interfaces; assess emerging AI platforms; move successful proofs of concept toward production; and communicate technical impact to business and technology stakeholders. The role requires full-stack software engineering, applied LLM experience, rapid technology adoption, and comfort working in a regulated financial institution.

Provides frontline technical and business support for critical Prime Finance applications covering prime brokerage and securities lending. Responsibilities include incident resolution, ticket management, monitoring, system onboarding, stability projects, change management, automation, and proactive resilience improvements. The role collaborates with global support teams, developers, business analysts, and financial business users while serving as a subject matter expert for securities lending applications.

Lead business analysis for an intraday liquidity solution within Citi’s Markets Treasury Technology team. Analyze data using Python and Excel, assess existing systems, translate business requirements into technology designs, define testing scenarios and acceptance criteria, and support software delivery through production rollout. The role partners with business, operations, technology teams, and senior stakeholders, requiring expertise in cash management, intraday liquidity, SWIFT payment and statement messages, Markets products, financial cash flows, and modern software engineering practices.