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