Lead Java Full Stack Developer

Citigroup Inc.; Mississauga; On-site; CAD 100,000 - 130,000; Full time

Job summary

Citigroup Inc. is seeking a Lead Java Developer in Mississauga, Canada. In this role, you will design, build, and support modern web applications using Java and Spring Boot. Responsibilities include developing responsive user interfaces with Angular and implementing microservices in a CI/CD environment.

The ideal candidate will have 6-10 years of experience in full-stack development, strong skills in API design, and a Bachelor's degree in Computer Science or related field. Join us to drive innovation in our web technologies.

Qualifications

• 6-10 years of experience in full-stack web application development.
• Strong backend development experience with Java and Spring Boot.
• Strong front-end development experience with Angular including TypeScript.

Responsibilities

• Develop and maintain web applications across the stack: UI, APIs, and backend services.
• Build scalable, secure microservices using Java and Spring Boot.
• Design, build, document, and consume RESTful APIs.

Skills

Java Development

Spring Boot

Angular

Microservices

RESTful APIs

SQL Server

Elasticsearch

Kafka

GitHub

CI/CD Pipelines

Education

Bachelor’s degree in Computer Science or a related field

Tools

Kendo UI

Docker

Kubernetes/OpenShift

Job description

Lead Java Developer

Job Description

Role Summary:

We are looking for a Java Full-Stack Engineer to design, build, and support modern web applications. This role spans front-end development (Angular or React) and back-end services (Java/Spring Boot), with a focus on API-first, microservices-based architecture and CI/CD-driven delivery.

Key Responsibilities

• Develop and maintain web applications across the stack: UI, APIs, and backend services.
• Build scalable, secure microservices using Java and Spring Boot.
• Develop responsive user interfaces using Angular, leveraging Kendo UI components where appropriate.
• Implement and support micro front-end patterns (composition, shared libraries, module federation or equivalent approaches).
• Design, build, document, and consume RESTful APIs; ensure service contracts and versioning strategies are followed.
• Work with SQL Server and optimize queries, indexes, and data access patterns.
• Implement search and indexing solutions with Elasticsearch.
• Build event-driven integrations using Kafka (producers/consumers, topics, schema/versioning awareness).
• Use GitHub / Bitbucket and contribute to automated CI/CD pipelines (build, test, deploy).
• Write unit and integration tests; participate in code reviews and engineering best-practice adoption.

Required Skills & Qualifications

• 6-10 years of experience in full-stack web application development.
• Strong backend development experience with Java and Spring Boot (REST APIs, security concepts, performance, and scalability).
• Strong front-end development experience with Angular including TypeScript, HTML5, and CSS.
• Experience using UI component libraries such as Kendo UI.
• Working knowledge of micro front-end architecture and patterns.
• Solid understanding of API design and microservices (service boundaries, resilience, observability basics).
• Hands‑on experience with SQL Server and relational data modeling.
• Experience with Elasticsearch and event streaming with Kafka.
• Proficiency with GitHub / Bitbucket workflows and practical experience with CI/CD pipelines.
• Strong communication skills, ownership mindset, and ability to work collaboratively in an agile team.

Preferred / Nice to Have

• Experience with cloud platforms (AWS, Azure, or GCP).
• Containerization and orchestration experience (Docker, Kubernetes/OpenShift).
• Experience with automated testing frameworks (unit, integration, and UI testing).
• Exposure to observability practices (logging, metrics, tracing) and production support.

Education

Bachelor’s degree in Computer Science, Software Engineering, or a related field (or equivalent practical experience)

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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