Senior Java Fullstack Developer

The Applications Development Senior 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.

About the Role

We're looking for a Java Backend Developer to design, build, and maintain scalable, secure, high-performance services. You'll work closely with product, QA, and frontend teams, and take ownership of features from design to production.

Key Responsibilities

• Design and develop RESTful APIs and microservices using Java and Spring Boot
• Write clean, testable, maintainable code following SOLID and design-pattern best practices
• Build event-driven systems using Kafka or RabbitMQ
• Design database schemas, optimize queries, and manage data access layers
• Participate in architecture discussions, code reviews, and design reviews
• Own deployments, monitoring, and production issue resolution
• Mentor junior developers and contribute to engineering standards
• Collaborate with frontend teams on API contracts and integration

Required Skills (Backend)

Strong Java (8/11/17+)

collections, concurrency, streams, lambdas, JVM internals and GC tuning

Spring ecosystem

Spring Boot, Spring MVC, Spring Data JPA, Spring Security, Spring Cloud

• Hibernate/JPA and MyBatis

Microservices architecture

service discovery, API gateway, circuit breakers (Resilience4j), config management

• REST API design, OpenAPI/Swagger; exposure to GraphQL and gRPC

Databases

MySQL/PostgreSQL/Oracle (strong SQL, indexing, transactions) and NoSQL (MongoDB, Cassandra, or DynamoDB)

Caching

Redis or Memcached

Messaging

Kafka, RabbitMQ, or ActiveMQ

Authentication and authorization

OAuth2, JWT, SSO, role-based access

Testing

JUnit, Mockito, integration testing (Testcontainers), TDD awareness

DevOps and Cloud

• Maven or Gradle, Git, CI/CD (Jenkins, GitLab CI, GitHub Actions)
• Docker and Kubernetes
• Cloud experience on AWS, Azure, or GCP

Logging and monitoring

ELK, Splunk, Prometheus, Grafana, Datadog

• Basic understanding of Infrastructure as Code (Terraform)

Good to Have (Frontend and Other)

• Working knowledge of React.js, Angular, or Vue.js
• HTML5, CSS3, JavaScript/TypeScript basics
• Understanding of how APIs are consumed by SPAs (CORS, state handling, pagination)
• Node.js exposure
• Experience with Agile/Scrum, Jira, and Confluence
• Domain knowledge in BFSI, e-commerce, or similar
• Performance testing (JMeter, Gatling) and security practices (OWASP Top 10)

Soft Skills

• Strong problem-solving and analytical thinking
• Clear written and verbal communication
• Ownership mindset and ability to work independently
• Comfortable mentoring and collaborating across teams

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.