Sr Java API Developer - New York

Position Summary

We are seeking a Senior Java API Developer to design, develop, and maintain secure, scalable, and high-performance RESTful APIs and microservices. The ideal candidate has extensive experience with Java, Spring Boot, API design, cloud-native development, and modern software engineering practices. You will collaborate with cross-functional teams to build enterprise-grade applications that are reliable, scalable, and maintainable.

Key Responsibilities

• Design, develop, and maintain RESTful APIs and microservices using Java and Spring Boot.


• Build scalable, secure, and high-performance backend services.


• Develop reusable and maintainable code following clean architecture and coding best practices.


• Collaborate with product owners, architects, frontend developers, QA, and DevOps teams throughout the software development lifecycle.


• Design and optimize database schemas, queries, and data access layers.


• Implement API security using OAuth2, JWT, OpenID Connect, and other authentication mechanisms.


• Integrate with third-party services, messaging systems, and enterprise applications.


• Develop unit, integration, and API tests to ensure code quality and reliability.


• Participate in code reviews, technical design discussions, and architecture decisions.


• Troubleshoot production issues, optimize application performance, and support deployments.


• Contribute to CI/CD pipelines and DevSecOps practices.

Required Qualifications

• Bachelor's degree in Computer Science, Engineering, or a related field.


• 5–8+ years of experience in Java backend development.


• Strong proficiency in Java 11/17 and object-oriented programming principles.


• Extensive experience with Spring Boot, Spring MVC, Spring Data JPA, and Spring Security.


• Strong experience designing and developing RESTful APIs and microservices.


• Experience with Hibernate/JPA and relational databases such as PostgreSQL, MySQL, or Oracle.


• Knowledge of NoSQL databases such as MongoDB or Cassandra is a plus.


• Experience with API documentation using Swagger/OpenAPI.


• Familiarity with messaging platforms such as Kafka or RabbitMQ.


• Experience using Git and modern CI/CD tools.


• Strong understanding of Agile/Scrum development methodologies.

Preferred Qualifications

• Experience with cloud platforms such as AWS, Azure, or GCP.


• Familiarity with Docker, Kubernetes, and containerized deployments.


• Experience implementing event-driven and distributed architectures.


• Knowledge of caching technologies such as Redis or Hazelcast.


• Exposure to GraphQL is a plus.


• Understanding of observability tools such as Prometheus, Grafana, ELK Stack, or Splunk.

Technical Skills

• Programming: Java 11/17, Core Java


• Frameworks: Spring Boot, Spring MVC, Spring Security, Spring Data JPA


• API Technologies: REST, OpenAPI/Swagger, JSON, GraphQL (optional)


• Databases: PostgreSQL, MySQL, Oracle, MongoDB


• Messaging: Apache Kafka, RabbitMQ


• Build Tools: Maven, Gradle


• Testing: JUnit, Mockito, REST Assured


• CI/CD: Jenkins, GitHub Actions, GitLab CI, Azure DevOps


• Containers: Docker, Kubernetes


• Version Control: Git

Compensation, Benefits and Duration

Minimum Compensation: USD 40,000

Maximum Compensation: USD 140,000

Compensation is based on actual experience and qualifications of the candidate. The above is a reasonable and a good faith estimate for the role.

Medical, vision, and dental benefits, 401k retirement plan, variable pay/incentives, paid time off, and paid holidays are available for full-time employees.

This position is not available for independent contractors

No applications will be considered if received more than 120 days after the date of this post