PayNot stated
LocationBelfast, GB
ContractFull Time
HybridFull-time
About the job
Discover your future at Citi
Working at Citi is far more than just a job. A career with us means joining a team of approximately 219,000 dedicated people from around the globe. At Citi, you'll have the opportunity to grow your career, give back to your community and make a real impact.
Job Overview
We are looking for a Senior Java Backend Engineer (C12) in Belfast to join the core engineering team building Vendor Master Central (VMC)-an enterprise-scale registry platform responsible for ingesting, reconciling, and managing millions of market data service records, contracts, and vendor hierarchies.
This role is backend-first, centered on designing high-throughput ingestion pipelines, resilient Spring Boot microservices, clean RESTful APIs, and domain data models. Experience or interest in Full Stack development with React/TypeScript is a strong plus, enabling end-to-end feature ownership from backend services up to user-facing web tools.
We actively embrace GenAI-assisted engineering (Devin, GitHub Copilot, Cursor) to automate boilerplate, accelerate unit testing, and achieve high engineering velocity.
Key Responsibilities:
- Backend Microservices: Design, build, and maintain production-grade REST APIs and microservices using Java 21/25 and Spring Boot.
- Data Ingestion & Processing: Build resilient ETL and reconciliation services that ingest, validate, and deduplicate complex monthly datasets from multiple upstream sources into a unified data model.
- Data Modeling & Storage: Design relational schemas (PostgreSQL / Oracle), optimize complex SQL queries, and implement transactional data integrity, staging layers, and immutable audit logs.
- Full Stack Collaboration (Bonus): Partner with or contribute to the React/TypeScript frontend to integrate APIs seamlessly with data grids, curation drawers, and bulk Excel upload workflows.
- GenAI Velocity: Leverage AI-powered developer tooling (Devin, Copilot, Cursor) for rapid prototyping, component scaffolding, and automated test coverage.
- Engineering Excellence: Drive high code quality through TDD/BDD (JUnit 5, Mockito), automated CI/CD pipelines, containerization (Docker/OpenShift), and code reviews.
- Mentorship & Ownership: Act as a technical pillar within the Pune agile squad, collaborating with global teams and mentoring junior engineers.
Core Backend Requirements:
- 5-8+ years of hands-on software development experience with core focus on Java (21/25) and Spring / Spring Boot.
- Strong foundation in RESTful API design, microservice architecture, and enterprise integration patterns.
- Deep expertise in relational databases (SQL), schema design, data indexing, transactions, and performance tuning (PostgreSQL, Oracle, or MySQL).
- Solid experience building data ingestion, transformation, or batch processing pipelines.
- Strong testing discipline: unit testing, integration testing, and mock frameworks (JUnit, Mockito, Testcontainers).
- Experience with modern DevOps pipelines (Git, Maven/Gradle, Jenkins/Tekton, Docker, Linux).
- Experience or familiarity with React, TypeScript, or modern frontend SPAs (state management, component design, data grids).
- Familiarity with client/server Excel file processing (.xlsx generation, bulk upload parsing).
- Experience working with autonomous AI engineering agents (e.g., Devin) or AI-assisted coding tools.
- Experience with message brokers or event streaming (Kafka, MQ).
- Education: Bachelor's degree in Computer Science, Software Engineering, or equivalent practical experience.
- Autonomy & Judgment: Ability to operate with limited direct supervision, make sound architectural choices, and deliver features independently.
- Communication: Strong English communication skills and ability to collaborate across distributed global teams (India, UK, US).
- Risk & Controls: Sound understanding of secure coding practices, data governance, and enterprise security standards.
This job description provides a high-level review of the types of work performed. Other job-related duties may be assigned as required.
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 well and 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 discounts for employees, family, and friends
- Access to an array of learning and development resources
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.------------------------------------------------------
Citi is an equal opportunity employer, and qualified candidates will receive consideration without regard to their race, color, religion, sex, sexual orientation, gender identity, national origin, disability, status as a protected veteran, or any other characteristic protected by law.
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