Backend Java API Developer

i4DM • Millersville, MD

4h

About The Position

We are seeking an experienced Senior Backend / API Application Developer to design, develop, and maintain scalable, secure backend systems and APIs. This role blends Java (Spring Boot) and JavaScript/TypeScript (Node.js) development and focuses heavily on data access, system integrations, and API-driven architectures. You will collaborate with cross-functional Agile teams to deliver high-quality, production-ready solutions that integrate with enterprise systems and external partners.

Requirements

• Bachelor’s degree in Computer Science, Engineering, or equivalent professional experience.
• 3–5+ years of experience in backend or API development using Java and/or JavaScript/TypeScript.
• Strong understanding of object-oriented programming, data structures, and design patterns.
• Hands-on experience with SQL and relational databases.
• Experience working with RESTful APIs, integrations, and distributed systems.
• Proficiency with Git and Agile development practices.
• Ability to obtain and maintain a U.S. Government Public Trust clearance.

Nice To Haves

• Experience with microservices architectures and integration middleware including Mulesoft.
• Knowledge of healthcare data exchange standards such as FHIR.
• Experience with cloud services (AWS: Lambda, ECS, RDS).
• Familiarity with additional backend languages such as Python, Go, or Ruby.

Responsibilities

• Design, develop, and maintain scalable and secure backend applications and RESTful APIs using Java (Spring Boot) and Node.js with TypeScript.
• Work extensively with relational databases (Salesforce, PostgreSQL, MySQL, Oracle, Microsoft SQL Server) and NoSQL data stores such as MongoDB or DynamoDB.
• Design and implement efficient data access layers, optimized queries, and database schemas to ensure performance and scalability.
• Build and maintain system-to-system integrations using RESTful APIs and event-driven messaging patterns.
• Configure and manage API gateways, proxies, routing, rate limiting, and access control using API management platforms.
• Develop asynchronous workflows using messaging systems such as Kafka or RabbitMQ.
• Write clean, efficient, and well-documented code with comprehensive unit and integration tests.
• Develop and maintain CI/CD pipelines using Jenkins or GitLab CI.
• Containerize applications using Docker and support orchestration with Kubernetes.
• Collaborate with Agile teams, participate in code reviews, and contribute to continuous improvement.

Benefits

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What This Job Offers

• Job Type: Full-time
• Career Level: Mid Level