Senior Application Development Lead – Generative AI (Gen AI), Vice President
Senior Application Development Lead - Generative AI(GenAI)
Are you looking for a career move that will put you at the heart of a global financial institution? Then bring your skills in analysis, application development, problem solving and communication to Source to PaySolutions Technologygroup.
By Joining Citi, you will become part of a global organisation whose mission is to serve as a trusted partner to our clients by responsibly providing financial services that enable growth and economic progress.
Team/Role Overview
Source to Pay Solutions Technology groupis part of COO( CitiOperating Office) Technology organization supporting CitiOperating Office business functionand its enterprise-widetransformation agendatoachieve improvements across risk management, controls, data governance, AI adoption, and process re -engineering by delivering scalable, secure, and modern technology solutions. Based in Belfast, the team partners closely with businesses and technology stakeholders to build, manage, and modernize multiple Source to Pay applications, playing a key role in translating strategic transformation priorities into measurable operational outcomes.
What you’lldo
- Senior Application Development Lead (GenAI) is a senior level position responsible for
- Set technical direction for GenAI adoption across multiple applications or teams, defining reusable patterns, reference architectures, and best practices aligned with enterprise standards.
- Design, integrate, and evolve GenAI capabilities (LLMs, APIs, agentic workflows, automation) in business-criticalapplications, focusing on clear value, reliability, and responsible usage
- Own end -to -enddelivery of GenAIenabled features, from solution design and implementation through production rollout, support, and continuous improvement
- Collaborate daily with global and regional technology and business teams to deliver against regulatory, risk, and transformation priorities
- Apply agile engineering practices, leveragingiterative delivery, pragmatic architectural decisions, and emerging GenAI/agentic tooling to accelerate outcomes
- Provide technical leadership and mentorship through hands-ondevelopment, code reviews, and design guidance, raising the overall engineering bar
- Ensure solutions meet Citi standards for security, stability, resilience, and operational control, working closely with architecture, risk, and production support teams
- Continuously assess and improve system quality, balancing performance, cost, accuracy, and user experience in production GenAI applications
What we’llneed from you
Deep expertisein Large Language Models (LLMs), including commercial and open-source models (e.g., OpenAI, Gemini, Claude, Llama), and selecting the right model for usecase, cost, and performance constraints
Hands -onexperience building GenAI applications using modern frameworks such as LangChain, LangGraph, LlamaIndex, and Hugging Face, including agentic and multi-stepworkflows
Proven experience designing and implementing Retrieval - AugmentedGeneration (RAG) systems, including vector databases (pgvector, Pinecone, Weaviate, FAISS, etc.) and advanced retrieval strategies (hybrid search, re-ranking, metadata filtering)
Strong understanding of prompt engineering, workflow design, and Gen -AIoptimization, balancing latency, cost, quality, and accuracy trade-offsin production systems
Solid grounding in ML/DL concepts, with hands-onexperience applying frameworks such as PyTorchand/or TensorFlow, including embeddings and model fine-tuningwhere appropriate
Experience deploying and operating production GenAI systems, leveragingDocker, cloud -nativearchitecture, production APIs, and monitoring/observability tools, with an emphasis on reliability and scalability
Stronghands -onsoftware engineering skills, including Python, FastAPI, async programming patterns, and building high-performanceAI-poweredAPIs
Understanding of AI system evaluation, safety, and governance, including hallucination handling, guardrails, feedback loops, and responsible AI considerations, combined with the ability to work independently and communicate effectively in agile environments
What we can offer you
This role offers the opportunity to shape how Generative AI is responsibly adopted across critical enterprise workflows, influencing both technology strategy and business outcomes. You’llwork at the intersection of platform engineering, AI governance, and large-scaletransformation, with clear visibility and impact across the organization.
We work hard to have a positive financial and social impact on the communities we serve. In turn, we put our employees first and provide the best-in-class benefits they need to be well, live welland save well.
By joining Citi Belfast, you will not only be part of a business casual workplace with a hybrid working model (up to 2 days working at home per week), but also receive a competitive base salary (which is annually reviewed), and enjoy a whole host of additional benefits such as:
Generous holiday allowance starting at 27 days plus bank holidays; increasing with tenure
A discretional annual performance related bonus
Private medical insurance packages to suit your personal circumstances
Employee Assistance Program
Pension Plan
Paid Parental Leave
Special discountsfor employees, family, and friends
Access to an array of learning and development resources
Alongside these benefits Citi is committed to ensuring our workplace is where everyone feels comfortable coming to work as their whole self every day. We want the best talent around the world to be energized to join us, motivated to stay, and empowered to thrive.
Sounds like Citi has everything you need?Then apply to discover the true extent of your capabilities.
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Job Family Group:
Technology------------------------------------------------------
Job Family:
Applications Development------------------------------------------------------
Time Type:
Full time------------------------------------------------------
Most Relevant Skills
Please see the requirements listed above.------------------------------------------------------
Other Relevant Skills
For complementary skills, please see above and/or contact the recruiter.------------------------------------------------------
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