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Sr Java Api Developer Jobs in Washington (NOW HIRING)

Java API Engineer

Washington, DC · On-site

$58.50 - $80/hr

RIT Solutions, Inc. is seeking a Senior Java API Engineer to support and enhance a REST-based API platform for mobile applications. This role involves maintaining backend services built with Java in ...

Java API Developer - 100% remote

Merrifield, VA · Remote

$52.25 - $67.50/hr

  • Medical

  • Dental

  • Vision

  • Life

  • Retirement

Java API Developer - 100% remote Location: Remote Type: Contract Compensation: Negotiable Work Model: Remote - offsite Hours: 40 hours a week Security Clearance: None but full background check ...

Senior Java Developer

Washington, DC · On-site

$64.75 - $82.75/hr

The Senior JAVA Developer position requires in-depth knowledge of JAVA and J2EEbackground using Spring Technologies framework, design, and architectural styles /API's (REST/RPC) and Agile ...

Sr Java Developer

Mclean, VA · On-site

$58.75 - $75/hr

Sr Java Developer McLean, VA - Hybrid Federal background Checks Min 10+ yrs genuine exp. Candidate ... REST API Web Services, GraphQL API query language. * Spring Core, MVC, Spring Boot, Spring Security ...

Sr Java Developer

Washington, DC · On-site

$80 - $85/hr

In Person The Senior JAVA Developer position requires in-depth knowledge of JAVA and J2EE background using Spring Technologies framework, design, and architectural styles /API's (REST/RPC) and Agile ...

Sr Java Developer

Herndon, VA · On-site

$58.75 - $75/hr

Company Description Sr. Java Developers * Term - Long Term - Min 6 months * Herndon VA u Core Java u Spring MVC and exposure to other frameworks u Java Script Library, JQuerry, Bootstrap, HTML5 u ...

Senior Java Developer

Ashburn, VA

$58.50 - $74.75/hr

We are looking for a Senior Java Developer to manage the software development life cycle, from planning and prioritizing to testing and release and help with the migration of a COBOL app to Java.

Our expanding client is looking for Sr. Java / Web service Developers in to drive our exciting ... Qualifications JAVA WEBSERVICES REST SOAP API Additional Information Multiple Openings for GC ...

Senior Java Developer

Mclean, VA · On-site

$57.75 - $73.75/hr

Senior Java Developer Location: McLean, VA Interview Type: On-site interview Requirement Senior Java Developer ICM BTO enterprise models technology needs a senior java developer to support growing ...

Java Developer

Mclean, VA

$51.50 - $66.75/hr

Java Restful API Developer Location: Mclean, VA Length: 2 years Accepting relo candidates?: YES PHONE HIRE Visa Copy needed - Yes Requirements: - 5+ years cumulative software engineering experience ...

Sr Java Developer

Washington, DC · On-site

$80 - $85/hr

In Person The Senior JAVA Developer position requires in-depth knowledge of JAVA and J2EE background using Spring Technologies framework, design, and architectural styles /API's (REST/RPC) and Agile ...

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Infographic showing various Sr Java Api Developer job openings in Washington as of August 2026, with employment types broken down into 1% As Needed, 91% Full Time, 3% Part Time, and 5% Contract. Highlights an 86% Physical, 5% Hybrid, and 9% Remote job distribution.

Java/Spring Fullstack Developer with Security Clearance

RMantra Solutions Inc.

Ashburn, VA • On-site

$53.75 - $69.25/hr

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Re-posted yesterday


Job description

RMantra Solutions is seeking to hire a Java Fullstack developer with expertise in Spring Boot for roles such as Full Stack Software Developer and Senior Java API Developer. Location: Ashburn, Virginia (Hybrid) will work onsite a couple of days weekly. Clearance: Must have either an active Department of Homeland Security (DHS) full Background Investigation (BI) or Top Secret or higher clearance. Will obtain a DHS Full BI clearance This position will involve working on mission-critical projects using and Agile Scrum methodologies. This role entails 75% development in Java and Spring Boot. Key Responsibilities
Application Development: Design, develop, code, and implement software applications, often using the Twelve-Factor App methodology. API and Microservices: Develop and design microservices and RESTful APIs. Cloud Integration: Work with cloud platforms such as Amazon Web Services (AWS) and containerization technologies like Docker and Kubernetes. Collaboration and Mentorship: Collaborate with cross-functional teams, participate in Agile ceremonies, and sometimes mentor junior staff. Testing and Quality: Maintain high standards of software quality using best practices and automated testing, including tools like JUnit and Selenium. Required Technical Skills
Programming Languages & Frameworks: Strong knowledge of modern Java (version 8+)
Spring Boot, and the broader Spring Framework (Cloud, Security, Data).
Front-end Technologies: Experience in front-end development using technologies like Angular or React, Redux, HTML, CSS, and JavaScript (ES6).
Databases: Experience interacting with relational databases like Oracle, PostgreSQL, MySQL, and NoSQL databases.
DevOps Tools: Proficiency with tools such as Git, Jenkins, SonarQube, Jira, and Confluence.
Authentication: Hands-on experience with modern authorization mechanisms like JSON Web Token (JWT) Immediate interview, send CURRENT resume to: