Java API Developer

The Applications Development Intermediate Programmer Analyst is an intermediate level position responsible for participation in the establishment and implementation of new or revised application systems and programs in coordination with the Technology team. The overall objective of this role is to contribute to applications systems analysis and programming activities.

We are looking for a Software Engineer with approximately 5 years of hands-on experience in designing end-to-end data pipelines using Java and Spring Boot, and enterprise API design . You will own end-to-end delivery of enterprise reporting APIs backed by complex data pipelines — from Oracle query design and ETL/ELT workflows to secure Spring Boot services deployed on shared infrastructure. The ideal candidate bridges the gap between application engineering and data platforms.

Responsibilities: Utilize knowledge of applications development procedures and concepts, and basic knowledge of other technical areas to identify and define necessary system enhancements, including using script tools and analyzing/interpreting code Consult with users, clients, and other technology groups on issues, and recommend programming solutions, install, and support customer exposure systems Apply fundamental knowledge of programming languages for design specifications. Analyze applications to identify vulnerabilities and security issues, as well as conduct testing and debugging Serve as advisor or coach to new or lower level analysts Identify problems, analyze information, and make evaluative judgements to recommend and implement solutions Resolve issues by identifying and selecting solutions through the applications of acquired technical experience and guided by precedents Has the ability to operate with a limited level of direct supervision. Can exercise independence of judgement and autonomy. Acts as SME to senior stakeholders and /or other team members. Appropriately assess risk when business decisions are made, demonstrating particular consideration for the firm's reputation and safeguarding Citigroup, its clients and assets, by driving compliance with applicable laws, rules and regulations, adhering to Policy, applying sound ethical judgment regarding personal behavior, conduct and business practices, and escalating, managing and reporting control issues with transparency.

Qualifications: 5+ years of relevant experience in the Financial Service industry Intermediate level experience in Applications Development role Consistently demonstrates clear and concise written and verbal communication Demonstrated problem-solving and decision-making skills Ability to work under pressure and manage deadlines or unexpected changes in expectations or requirements

Skills & Requirements Strong in Core Java — collections, generics, streams, lambdas, exception handling, OOPs concepts, and multithreading/concurrency (executors, threads). Strong in Spring Boot — Spring Data, Spring Batch, Spring Security. Experience with Spring Data JPA/JDBC — repositories, entity mapping, transactions (@Transactional), connection pooling (HikariCP), and lazy/eager loading. Hands-on with Spring Security — authentication/authorization, BCrypt, role-based access control, and securing REST endpoints. Design, develop, and maintain RESTful APIs using Java and Spring Boot. Must have e end-to-end API development lifecycle — from design and contract definition through implementation, testing, deployment, and monitoring. Strong understanding and implementation experience of integrating APIs with API gateways such as Apigee and Amazon API Gateway. Proficient with Jackson (ObjectMapper config, custom serializers, strict request validation) and OpenAPI/Swagger for API documentation. Write and optimize complex Oracle SQL queries (multi-table joins, analytic functions, subqueries, performance tuning). Experience with Kafka, MQ, or event-streaming platforms for real-time data ingestion and processing. Open to working on data pipelines and building ETL workflows using Java or other programming languages such as Scala as required. Work with data warehousing concepts — fact/dimension modeling, slowly changing dimensions, and data quality checks. Basic understanding of the Big Data ecosystem is a plus. Good to have experience building and optimizing data workflows using tools such as Apache Spark.

Education: Bachelor’s degree/University degree or equivalent experience

This job description provides a high-level review of the types of work performed. Other job-related duties may be assigned as required.

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.