Senior Backend Architect & Tech Lead - Java Spring Microservices

Citi; Belfast City District; Hybrid; GBP 90,000 - 120,000; Full time

Benefits offered by this job

Hybrid work model

Competitive base salary

Private medical insurance

Job summary

Citi Belfast is seeking an Applications Development Technical Lead (C13 / VP) to architect and lead backend systems for our Enterprise Vendor & Market Data Services Registry Platform.

You will mentor engineers, drive Java microservices (21/25) and Spring Boot, design REST APIs, and implement cloud-native patterns with Docker and OpenShift, while collaborating with global teams.

This hybrid role offers a competitive base salary and a path to technical leadership in a high-scale data environment.

Qualifications

• 7+ years of hands-on software engineering with Java and Spring
• Experience with relational DBs (Oracle, PostgreSQL) and SQL
• Designing enterprise RESTful APIs and microservices
• DevOps tooling and cloud-native patterns (Docker/OpenShift/K8s)
• Familiarity with AI coding assistants (Devin, Copilot, Cursor)

Responsibilities

• Architect, design, and deliver high-performance Java/Spring Boot microservices for enterprise data ingestion and reconciliation
• Lead data models, audit trails, and transactional pipelines from multiple sources
• Define APIs, ensure secure, well-documented contracts for internal and downstream consumers
• Champion cloud-native deployment patterns with CI/CD automation and security governance
• Mentor engineers, shape technical roadmaps, and drive automated testing and QA

Skills

7+ years

Java 21/25

Spring Ecosystem

RESTful API Design

Mentoring/Leadership

AI Coding Assistants

Education

Bachelor’s / Master’s in CS/SE

Tools

Docker

OpenShift/Kubernetes

Git

Maven/Gradle

CI/CD (Tekton/Jenkins)

JUnit 5/Mockito/Testcontainers

Job description

Citi Belfast is seeking an Applications Development Technical Lead (C13 / VP) to architect and lead backend systems for our Enterprise Vendor & Market Data Services Registry Platform.

You will mentor engineers, drive Java microservices (21/25) and Spring Boot, design REST APIs, and implement cloud-native patterns with Docker and OpenShift, while collaborating with global teams.

This hybrid role offers a competitive base salary and a path to technical leadership in a high-scale data environment.