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.
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Job Family Group: Technology
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Job Family:Applications Development
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Time Type:Full time
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Most Relevant Skills Please see the requirements listed above.
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Other Relevant Skills For complementary skills, please see above and/or contact the recruiter.
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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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Skills
Java, JavaScript, TypeScript, React, Node.js, Spring Boot, Spring, HTML/CSS, Vue.js, Angular

Experience
5+ yrs