Senior API Developer

General Dynamics Information Technology, Inc.; United States; Remote; USD 150,000 - 190,000; Full time

Job summary

General Dynamics Information Technology, Inc. is seeking a Senior Microservices Developer for our 100% remote agile team supporting EPA customers. You will collaborate with government customers and GDIT developers to design modular Spring Boot services and integrate with legacy systems.

You will apply best practices for performance, security and CI/CD, document designs with Confluence, and mentor junior developers while solving complex data-flow challenges across microservices and databases.

Qualifications

• 7–12+ years in Java enterprise application development.
• Experience with modular API design and persistence architecture.
• Knowledge of REST API design in Spring and data access patterns.
• Experience documenting designs with Confluence or similar.
• US citizenship and EPA Public Trust Level 4 eligibility.

Responsibilities

• Modernize legacy applications using Spring Boot and modern Java (17+).
• Decompose monoliths into microservices with proper REST and event-driven communication.
• Integrate with EPA systems, databases, and APIs ensuring data consistency.
• Implement security best practices including authentication and authorization.
• Develop and review unit, integration, and end-to-end tests; mentor juniors.

Skills

Core Java

Spring Boot

REST API design

JPA / Hibernate

Git / GitHub

AI tooling (Copilot)

API security & error handling

OpenAPI / Swagger

Maven

Microservices

CI/CD & Docker

Problem solving

Education

Bachelor's degree in Computer Science or related

Tools

Oracle

PostgreSQL

GitHub

Swagger/OpenAPI

Maven

Docker

Job description

Our 100% remote agile development team is looking for a Senior Microservices Developer to help us deliver top-quality development support for our Environmental Protection Agency (EPA) customers.

You will work directly with our government customers and with other GDIT developers and business analysts to create advanced software tools tailored to scientific applications. You’ll apply new approaches, principles, methods, techniques and tools compatible with the research environment within EPA. You’ll be a creative problem-solver, understand IT solutions from a users’ perspective and contribute to strategies for a modern integrated IT environment.

MEANINGFUL WORK AND PERSONAL IMPACT

The API Developer requires in-depth knowledge of modular API design and persistence architecture using Spring Boot. The role involves collaborative interactions with EPA staff and contractors, ensuring architecture aligns with legacy systems and supports efficient data flow. The successful candidate will document design and implementation techniques using tools like Atlassian’s Confluence. The developer will optimize services for performance, scalability, and security while adhering to best practices. The selected candidate will resolve development and deployment issues, working closely with API developers, data engineers, and other technical staff to ensure seamless integration with existing databases and applications.

WHAT YOU’LL NEED TO SUCCEED

Bring your engineering expertise along with a drive for innovation to GDIT. You must have:

• Technical skills (bolded items are hard requirements):
  • Core Java (version 17 and 21)
  • Spring Boot ecosystem including Spring Core, Spring Data JPA and repositories
  • A strong knowledge of REST API design using Spring controllers
  • JPA / Hibernate
  • Relational database design (Oracle, Postgres etc)
  • Junit / Mockito
  • Git and GitHub
  • Must be able, and willing, to utilize AI tools (particularly, Copilot)
  • Understanding of API error handling, validation, logging and security
  • Bruno or other API testing tools
  • Open-API / Swagger
  • Maven
  • Microservice architecture
  • Performance optimization
  • Experience with government or regulated industry applications is a plus
  • Strong problem-solving and debugging skills
  • Familiarity with CI/CD, Docker (plus)
  • Ruby on Rails (plus)
• Security clearance level: must be able to obtain EPA Public Trust Level 4
• US citizenship required

Key Responsibilities:

• Modernization & Refactoring: Modernize a legacy application using Spring Boot, Cloud, and modern Java (17+), replacing legacy components with modular, testable, and maintainable code
• Microservices Architecture: Break down monolithic components into independent, loosely coupled modules/microservices, ensuring proper communication via REST and event-driven patterns
• Integration: Integrate with existing EPA systems, databases, and APIs, ensuring data consistency and compliance with regulatory requirements
• Security: Implement and enforce security best practices, including authentication, authorization, and data protection
• Testing & Quality: Develop comprehensive unit, integration, and end-to-end tests; conduct code reviews and mentor junior developers

Required Soft Skills/Organizational Skills Qualifications:

• Ability to prioritize and complete a wide variety of tasking workloads with critical deadlines.
• Excellent critical thinking and problem-solving skills.

• Superior oral and written communications skills, and a demonstrated ability to maintain a patient and professional demeanor, with a can-do attitude.

• Ability to communicate technical concepts clearly and professionally to both technical and non-technical parties (who may be key stakeholders).

• Ability to manage equipment and services in remote locations.
• Ability to work effectively in a remote team environment.
• Workability to perform well under pressure.
• Strong customer service orientation.
• Ability to maintain an organized workflow, with a high degree of attention to detail.

EDUCATION AND EXPERIENCE:

• Education: Bachelor of Arts/Bachelor of Science
• Experience: 7–12+ years in Java enterprise application development