Lead Java Developer

Citigroup Inc.; Belfast City District; Hybrid; GBP 70,000 - 110,000; Full time

Benefits offered by this job

Hybrid work arrangement (3 days in the

Learning resources

Wellbeing support

Competitive benefits

Job summary

Citigroup Inc. is recruiting a Lead Java Developer to steer senior technical work within Citi’s Event Master Central team. You will design and implement complex Java-based solutions, lead microservices development, and drive best practices in CI/CD, testing, and code quality.

The role emphasizes leadership and collaboration across technology and product teams, with a hybrid office/remote arrangement. The position requires strong core Java skills, Spring, microservices, and experience with Kafka

Qualifications

• Significant hands-on software engineering experience in enterprise-scale environments, with a proven track record of delivering robust, high-performance applications.
• Strong knowledge of Java/J2EE, Spring Boot, and RESTful web services (XML, JSON).
• Proven experience working with Microservices Architecture.
• Hands-on experience with Core Java, Multi-threading, Collections framework, and Spring Framework.
• Practical experience designing and implementing event-driven systems using Apache Kafka, including topic configuration, producer/consumer APIs, and stream processing.
• Solid understanding of software engineering best practices, OOP, design patterns, and CI/CD pipelines.
• Experience with source code management tools (Git).
• Understanding of clean coding principles and code quality measurements using tools like Sonar.
• Demonstrated ability to design and implement unit, integration, and functional tests.
• A strong, solution-driven mindset with the ability to analyze complex problems, devise strategic solutions, and lead their implementation.
• Good written and verbal communication skills.
• Experience with AI technology (Devin, Co Pilot)
• Understanding of Cloud-native development principles.
• Experience with Container Orchestration tools (Docker, Kubernetes, OpenShift, etc.).
• Proficiency in using Jira for tracking tasks, managing backlogs, and participating in sprint cycles.

Responsibilities

• Develop and implement complex software solutions using Java/J2EE, Spring Boot, and RESTful web services.
• Design, develop, and maintain robust microservices adhering to architectural best practices.
• Apply hands-on expertise in Core Java, including multi-threading and the Collections framework.
• Utilize Spring Framework effectively for application development.
• Work extensively in creating and optimizing SQL queries.
• Ensure adherence to software engineering best practices, object-oriented programming (OOP) principles, and design patterns.
• Contribute to the continuous integration and continuous delivery (CI/CD) pipelines.
• Manage source code effectively using tools such as Git or Bitbucket.
• Promote and apply clean coding principles and maintain high quality using tools like Sonar.
• Design and implement comprehensive unit, integration, and functional tests to ensure solution quality.
• Analyze and solve complex technical problems efficiently.
• Lead, mentor, and manage a team of application developers, fostering a culture of excellence, collaboration, and continuous improvement.

Skills

Java/J2EE

Spring Boot

RESTful web services

Microservices

Core Java

Multi-threading

Collections framework

Spring Framework

Event-driven systems

Kafka

CI/CD pipelines

Git

Sonar

Unit testing

Integration testing

Cloud-native

Docker

Kubernetes

OpenShift

Jira

Tools

Docker

Kubernetes

OpenShift

Git

Jira

Sonar

Job description

About the team:

Event Master Central is Citi’s centralized corporate action event repository and distribution platform that consolidates corporate action announcements and notifications from various vendors with cross-business operational process. As a critical pillar within the Master Reference Data (MRD)and the broaderCiti Enterprise Data Organization (EDO), our team is responsible for modernizing and managing the end-to-end lifecycle of corporate Action events across the enterprise.

The Lead Java Developer is a senior level position responsible for establishing and implementing new or revised application systems and programs in coordination with the Technology and Product team. The overall objective of this role is to lead applications systems analysis, design and programming activities. This is a senior technical position responsible for accomplishing results through the management of a variety of engineering activities including the design, acquisition and deployment of hardware, software and network infrastructure in coordination with the Technology team.

Your responsibilities will be:

• Develop and implement complex software solutions using Java/J2EE, Spring Boot, and RESTful web services.
• Design, develop, and maintain robust microservices adhering to architectural best practices.
• Apply hands-on expertise in Core Java, including multi-threading and the Collections framework.
• Utilize Spring Framework effectively for application development.
• Work extensively in creating and optimizing SQL queries.
• Ensure adherence to software engineering best practices, object-oriented programming (OOP) principles, and design patterns.
• Contribute to the continuous integration and continuous delivery (CI/CD) pipelines.
• Manage source code effectively using tools such as Git or Bitbucket.
• Promote and apply clean coding principles and maintain high quality using tools like Sonar.
• Design and implement comprehensive unit, integration, and functional tests to ensure solution quality.
• Analyze and solve complex technical problems efficiently.
• Lead, mentor, and manage a team of application developers, fostering a culture of excellence, collaboration, and continuous improvement.

What we need from you:

• Significant hands-on software engineering experience in enterprise-scale environments, with a proven track record of delivering robust, high-performance applications.
• Strong knowledge of Java/J2EE, Spring Boot, and RESTful web services (XML, JSON).
• Proven experience working with Microservices Architecture.
• Hands-on experience with Core Java, Multi-threading, Collections framework, and Spring Framework.
• Practical experience designing and implementing event-driven systems usingApache Kafka, including topic configuration, producer/consumer APIs, and stream processing.
• Solid understanding of software engineering best practices, OOP, design patterns, and CI/CD pipelines.
• Experience with source code management tools (Git).
• Understanding of clean coding principles and code quality measurements using tools like Sonar.
• Demonstrated ability to design and implement unit, integration, and functional tests.
• A strong, solution-driven mindset with the ability to analyze complex problems, devise strategic solutions, and lead their implementation.
• Good written and verbal communication skills.
• Experience with AI technology (Devin, Co Pilot)
• Understanding of Cloud-native development principles.
• Experience with Container Orchestration tools (Docker, Kubernetes, OpenShift, etc.).
• Proficiency in using Jira for tracking tasks, managing backlogs, and participating in sprint cycles.

What we can offer:

At Citi, you will work at the intersection of data, finance, and commercial strategy, contributing to decisions that have real impact across a global organization. This role offers meaningful autonomy, cross-functional collaboration, and the opportunity to grow your analytical and governance expertise within a high-performing team.

• A hybrid working model with 3 days in the office and 2 days working remotely, giving you flexibility alongside team connection.
• Exposure to complex, high-value commercial and financial decisions that directly shape vendor strategy at a global scale.
• Access to learning and development resources that support your growth in data analytics, financial governance, and emerging technologies.
• The opportunity to work across finance, sourcing, and technology functions, broadening your professional network and cross-functional expertise.
• Wellbeing support and work-life balance initiatives designed to help you perform at your best.
• Competitive financial benefits and a rewards package aligned to your experience and contribution.

#LI-OD1

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.

If you are a person with a disability and need a reasonable accommodation to use our search tools and/or apply for a career opportunity review Accessibility at Citi.

View Citi’s EEO Policy Statement and the Know Your Rights poster.