CitiDirect Senior Java Dev for Payments Modernization – Vice President

Citigroup Inc.; Mississauga; On-site; CAD 121,000 - 171,000; Full time

Job summary

Citigroup Inc. in Mississauga, Canada is seeking a Senior Java Backend Developer to join CitiDirect’s payments platform modernization. You will craft Java-based backend services, emphasizing Spring Framework, microservices, and secure APIs in a fast-paced financial setting.

You will work with Kafka, MongoDB, Oracle, and perform rigorous testing while mentoring junior developers and contributing to best practices.

Qualifications

• 7+ years of experience in Java development
• Extensive experience with Spring Framework, Spring Boot and Spring Cloud
• Proven track record of designing and implementing microservices architecture
• Experience with Reactive programming
• Proficiency with Apache Kafka and event-driven systems
• Strong MongoDB experience with schema design and performance optimization
• Solid understanding of NoSQL concepts and best practices
• Experience with Oracle SQL and performance tuning
• Expertise in RESTful API design principles
• Proficiency in unit and integration testing (JUnit, Mockito)
• Knowledge of application security principles and secure coding practices
• Experience implementing OAuth 2.0/JWT in microservices architectures

Responsibilities

• Design, develop, and maintain robust, scalable Java-based backend services
• Architect and implement microservices using Spring Framework 6, Spring Boot 3 and Spring Cloud
• Design and implement event-driven architectures using Apache Kafka
• Work with MongoDB and Oracle - design schemas and optimize queries
• Implement and maintain comprehensive unit and integration tests
• Participate in code reviews and mentor junior developers
• Contribute to continuous improvement of development processes and best practices

Skills

Java development

Spring Framework

Microservices

Reactive programming

RESTful APIs

OAuth 2.0 / JWT

JUnit & Mockito

Tools

Docker

Kubernetes

Apache Kafka

MongoDB

Oracle

SQL

CI/CD

Job description

Services is a leading provider of cash management, treasury, trade, clearing, depository receipts and commercial cards services. Services has a global network spanning more than 90 countries and is unique in the industry for its reach, interoperability, and flexibility. We provide clients with dynamic information, platforms, tools, and APIs to effectively manage their portfolios, financial positions, working capital and supply chains. CitiDirect serves as the unified digital gateway for clients to access our full suite of services.

We are seeking an experienced Senior Java Backend Developer to join a group modernizing CitiDirect’s Payment architecture. The ideal candidate will have a strong foundation in Core Java and extensive experience with Spring Framework, microservices architecture, Apache Kafka, MongoDB, and Oracle databases.

Key Responsibilities:

• Design, develop, and maintain robust, scalable, and high-performance Java-based backend services
• Architect and implement microservices using Spring Framework 6, Spring Boot 3 and Spring Cloud
• Design and implement event-driven architectures using Apache Kafka
• Work with MongoDB and Oracle - design schemas and optimize queries
• Implement and maintain comprehensive unit and integration tests
• Participate in code reviews and mentor junior developers
• Contribute to the continuous improvement of our development processes and best practices

Required Qualifications:

• 7+ years of experience in Java development, with a strong command of Core Java concepts
• Extensive experience with Spring Framework, including Spring Boot and Spring Cloud
• Proven track record of designing and implementing microservices architecture
• Experienced in Reactive programming
• Proficiency in working with Apache Kafka, including designing and implementing event-driven systems
• Strong experience with MongoDB, including schema design, complex queries, and performance optimization for large-scale applications
• Solid understanding of NoSQL database concepts and best practices
• Experience with Oracle databases and SQL, and performance optimization
• Expertise in RESTful API design principles
• Proficiency in writing unit and integration tests using frameworks like JUnit and Mockito
• In-depth knowledge of application security principles and experience implementing secure coding practices
• Expertise in implementing authentication and authorization in microservices architecture (OAuth 2.0, JWT etc.)

Preferred Qualifications:

• Familiarity with containerization technologies (e.g., Docker, Kubernetes)
• Experience with CI/CD pipelines and DevOps practices
• Understanding of Agile methodologies
• Solid understanding of payments industry, including various payment systems and processes
• Familiarity with ISO 20022 standards, and their application in payments messaging
• Contributions to open-source projects

Job Family Group:

Technology

Job Family:

Applications Development

Time Type:

Full time

Primary Location Full Time Salary Range:

$120800,00 - $170800,00

Most Relevant Skills

Please see the requirements listed above.

Other Relevant Skills

For complementary skills, please see above and/or contact the recruiter.

Automated Processing and AI

We use automated processing, including artificial intelligence, for our legitimate business interests (or our reasonable and appropriate business purposes) to identify and align the candidate's skills and abilities with a specific job opening. Additionally, if you so choose, or consent, we can match your skills and abilities to other suitable roles at Citi.

Importantly, all our hiring processes and decisions, including determining your suitability for a role, are conducted, checked, and decided by individuals. Our automated processing and AI do not involve relying on automatic or autonomous decision-making. Please refer to any Jurisdictional Considerations, with specific provisions for your country (where relevant) for further details.

This job opening is for an existing job vacancy.

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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