Java Developer

Summary

i4DM provides federal agencies with experienced professionals and tailored technology solutions to help them modernize and succeed. The company is seeking a Mid-Level Java Developer to design, develop, and maintain Java-based microservices and RESTful APIs for mission-critical federal applications in cloud-native environments. The role also involves database development, testing, containerization, CI/CD, troubleshooting, security, documentation, and collaboration within an Agile team.

Responsibilities

• Design, develop, and maintain scalable RESTful APIs and backend microservices using Java 21+ and modern Spring Boot frameworks
• Develop, optimize, and maintain PostgreSQL database schemas, queries, and migration scripts to ensure high performance and reliability
• Implement caching, session management, and lightweight messaging solutions using Redis
• Containerize applications using Docker and deploy services to Kubernetes environments, leveraging tools such as Skaffold for streamlined local development workflows
• Develop and maintain comprehensive unit and integration tests using JUnit and Mockito to ensure code quality and application stability
• Create, maintain, and validate API documentation and test suites using Postman and OpenAPI/Swagger specifications
• Contribute to CI/CD automation pipelines using tools such as Jenkins, GitLab CI, or GitHub Actions to support efficient build, testing, and deployment processes
• Participate actively in Agile Scrum ceremonies, including backlog refinement, sprint planning, story estimation, sprint reviews, and retrospectives
• Collaborate with senior engineers, product managers, architects, and cross-functional stakeholders to translate business and technical requirements into scalable solutions
• Participate in peer code reviews by providing and incorporating constructive feedback to maintain coding standards and engineering best practices
• Troubleshoot application issues, identify performance bottlenecks, and implement improvements to enhance system reliability, observability, scalability, and maintainability
• Apply secure software development practices, including authentication and authorization standards such as OAuth2 and JWT, while adhering to federal data security requirements
• Maintain accurate and up-to-date technical documentation for APIs, services, system components, and development processes

Skills

• • Bachelor's degree in computer science, Engineering, Information Technology, or a related technical field, or equivalent practical experience
• • Minimum of 3–5 years of professional experience in Java application development, including backend services and API development
• • Proficiency with modern Spring Boot, including Spring Web, Spring Data JPA, Spring Security, and the broader Spring ecosystem
• • Working knowledge of Java 17+ features and willingness to adopt modern Java 21+ capabilities such as records, pattern matching, virtual threads, and sealed classes
• • Strong experience designing and developing RESTful APIs, including versioning, error handling, idempotency, and HTTP best practices
• • Experience utilizing API testing and validation tools such as Postman, including creating and maintaining collections, managing environments, and developing automated test scripts
• • Solid experience with PostgreSQL or comparable relational databases, including schema design, indexing, and performance optimization
• • Hands-on experience with Docker for building, running, and troubleshooting containerized applications
• • Exposure to Kubernetes concepts such as Deployments, Services, ConfigMaps, and Secrets, with experience deploying applications to clusters
• • Experience writing unit and integration tests using JUnit and Mockito, with a strong commitment to code quality and automated testing practices
• • Solid understanding of object-oriented programming principles, design patterns, and clean-code methodologies
• • Proficiency with Git and modern source control workflows using platforms such as GitHub, GitLab, or Bitbucket
• • Familiarity with CI/CD pipelines and DevOps practices using tools such as Jenkins, GitLab CI, or GitHub Actions
• • Experience using build and dependency management tools such as Maven or Gradle
• • Experience working within Agile development environments using Scrum or Kanban methodologies and tools such as Jira
• • Strong written and verbal communication skills with the ability to collaborate effectively across technical and non-technical teams
• • Ability to obtain and maintain a U.S. Government Public Trust clearance
• • Ability to work effectively in a fully remote, collaborative team environment
• • Experience with Kubernetes-native deployment and development tools such as Skaffold, Kustomize, or Helm
• • Experience with Redis for caching, distributed locking, rate limiting, or pub/sub implementations
• • Familiarity with asynchronous messaging technologies such as Apache Kafka or RabbitMQ
• • Understanding of microservices architecture patterns including service discovery, circuit breakers, and API gateways
• • Experience with API management platforms such as Kong, Apigee, or AWS API Gateway for proxies, rate limiting, and access control
• • Experience working with containerized and cloud-native application environments
• • Experience with observability and monitoring tools such as Prometheus, Grafana, Elasticsearch/Kibana, or Splunk
• • Demonstrated experience developing enterprise applications using Java and Spring Boot frameworks
• • Exposure to cloud platforms, particularly AWS services such as ECS, EKS, RDS, S3, and Lambda
• • Basic front-end development experience using HTML5, CSS, and JavaScript
• • Healthcare or federal domain experience, including familiarity with FHIR data exchange standards
• • Experience with additional programming languages such as Python, JavaScript/TypeScript, or Go
• • Military-experienced candidates are encouraged to apply

Qualifications

Must Haves

• • Bachelor's degree in computer science, Engineering, Information Technology, or a related technical field, or equivalent practical experience
• • Minimum of 3–5 years of professional experience in Java application development, including backend services and API development
• • Proficiency with modern Spring Boot, including Spring Web, Spring Data JPA, Spring Security, and the broader Spring ecosystem
• • Working knowledge of Java 17+ features and willingness to adopt modern Java 21+ capabilities such as records, pattern matching, virtual threads, and sealed classes
• • Strong experience designing and developing RESTful APIs, including versioning, error handling, idempotency, and HTTP best practices
• • Experience utilizing API testing and validation tools such as Postman, including creating and maintaining collections, managing environments, and developing automated test scripts
• • Solid experience with PostgreSQL or comparable relational databases, including schema design, indexing, and performance optimization
• • Hands-on experience with Docker for building, running, and troubleshooting containerized applications
• • Exposure to Kubernetes concepts such as Deployments, Services, ConfigMaps, and Secrets, with experience deploying applications to clusters
• • Experience writing unit and integration tests using JUnit and Mockito, with a strong commitment to code quality and automated testing practices
• • Solid understanding of object-oriented programming principles, design patterns, and clean-code methodologies
• • Proficiency with Git and modern source control workflows using platforms such as GitHub, GitLab, or Bitbucket
• • Familiarity with CI/CD pipelines and DevOps practices using tools such as Jenkins, GitLab CI, or GitHub Actions
• • Experience using build and dependency management tools such as Maven or Gradle
• • Experience working within Agile development environments using Scrum or Kanban methodologies and tools such as Jira
• • Strong written and verbal communication skills with the ability to collaborate effectively across technical and non-technical teams
• • Ability to obtain and maintain a U.S. Government Public Trust clearance
• • Ability to work effectively in a fully remote, collaborative team environment

Nice to Haves

• • Experience with Kubernetes-native deployment and development tools such as Skaffold, Kustomize, or Helm
• • Experience with Redis for caching, distributed locking, rate limiting, or pub/sub implementations
• • Familiarity with asynchronous messaging technologies such as Apache Kafka or RabbitMQ
• • Understanding of microservices architecture patterns including service discovery, circuit breakers, and API gateways
• • Experience with API management platforms such as Kong, Apigee, or AWS API Gateway for proxies, rate limiting, and access control
• • Experience working with containerized and cloud-native application environments
• • Experience with observability and monitoring tools such as Prometheus, Grafana, Elasticsearch/Kibana, or Splunk
• • Demonstrated experience developing enterprise applications using Java and Spring Boot frameworks
• • Exposure to cloud platforms, particularly AWS services such as ECS, EKS, RDS, S3, and Lambda
• • Basic front-end development experience using HTML5, CSS, and JavaScript
• • Healthcare or federal domain experience, including familiarity with FHIR data exchange standards
• • Experience with additional programming languages such as Python, JavaScript/TypeScript, or Go
• • Military-experienced candidates are encouraged to apply

Benefits

• Fully remote work capacity
• Mentorship
• Professional growth and the opportunity to expand expertise in Kubernetes, distributed systems, cloud-native architectures, and modern DevOps practices