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Freelance Java Backend Developer Jobs in Virginia

LT Consulting

Backend Web Developer

Reston, VA

Description LT Consulting is seeking a Backend Web Developer with an active TS/SCI polygraph ... Proficiency with Java and Spring Boot, Node and Express, Python with Flask or Django, or similar ...

Chenega MIOS

Jr. Backend Developer

Vienna, VA

Req ID: 40540 Summary Jr. Backend Developer Vienna, VA Are you ready to enhance your skills and ... Python * JavaScript / Node.js * Java (for enterprise integrations and services) * Experience ...

CGI Inc.

Software Developer (Back End)

Fairfax, VA · On-site

Develop and maintain backend services and APIs using Golang, Python, Java, and other technologies ... Programming Languages: • Proficiency in Golang, knowledge of GIN, GORM, and other related ...

Cliff Services Inc

Java Developer

Mclean, VA

$52.25 - $67.75/hr

The ideal candidate is a hands-on backend developer with 8+ years of strong Java development experience and a proven track record of delivering scalable, enterprise-grade applications in a fast-paced ...

BTree Solutions, Inc.

FULLSTACK JAVA DEVELOPER

Mclean, VA · On-site

$53.50 - $69/hr

JAVA FULLSTACK DEVELOPER Location: Mclean,VA Duration: 12+ Months Visa: USC, GC, H1B and EAD ... Angular front end. Java backend springboot. Testing focus important for some of the work, automated ...

Macro Solutions

Java Kafka Developer (Hybrid)

Ashburn, VA · Hybrid

$52.25 - $67.50/hr

Java Kafka Developer - Full-Time Ashburn, VA (Hybrid - 1 to 2 days onsite / 3 to 4 days remote ... This role focuses on backend development within an event-driven, microservices architecture ...

Infosys

Java backend with Python

Reston, VA · On-site

Required : • Experience in Java Backend with proficiency in Java, springboot and microservices ... Preferred : • Experience with CI/CD pipelines, DevOps practices, and test automation frameworks ...

New

Saviance Technologies

Java Developers (Multiple)

Reston, VA · On-site

$53 - $68.75/hr

Mid-level Java Developer 1.Experience in core Java, backend java. 2. Experience with SOA architecture, webservices 3. Understanding of XML technologies like XSLT, XSD 4. Experience with Spring batch ...

Maximus

Senior Back End Developer

VA · On-site +1

$120K - $157K/yr

General information Job Posting Title Senior Back End Developer Date Friday, May 8, 2026 City ... Python - Luna - Java - Docker - OpenJDK - Ansible - Packer - Maven - Kubernetes - Red Hat ...

Infosys

Java Backend Lead Developer

Reston, VA · On-site

$52.75 - $68.25/hr

Required : • Experience in software development using Java • Spring Boot • Rest Webservices • Bachelor's degree or foreign equivalent required from an accredited institution • Will also ...

Maximus

Senior Back-End Developer

VA · On-site +1

$120K - $157K/yr

The Senior Back-End Developer provides subject matter proficiency for work described in the task. Responsible for providing analytical skills to support process improvement, specialized studies, and ...

campus4tech

Backend Java Engineer

Vienna, VA · On-site

$50.75 - $65.75/hr

Java + Spring / Spring Boot Azure DevOps Microservices Description: We are seeking a mid-to-senior Back-End Java Engineer to design, develop, test, integrate, and maintain back-end services and ...

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Backend Web Developer

LT Consulting

Reston, VA

Full-time

Posted 13 days ago

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Job description

Description

LT Consulting is seeking a Backend Web Developer with an active TS/SCI polygraph clearance to design and build secure, high-performance APIs and backend services supporting mission-focused applications. As a Backend Developer, you'll work across the full scope of backend services, developing scalable microservices, managing data persistence layers, and automating integration processes using cloud-native architectures.

Basic Qualifications

  • Active TS/SCI clearance with polygraph

  • Bachelor's degree in Computer Science or a related field

  • Demonstrated professional experience developing backend systems and APIs

  • Proficiency with Java and Spring Boot, Node and Express, Python with Flask or Django, or similar backend stacks

  • Experience designing and building RESTful APIs and integrating with relational databases (PostgreSQL, MySQL, or Oracle)

  • Familiarity with authentication and authorization standards such as OAuth 2.0 and OpenID Connect

  • Experience with build automation tools and dependency management (Gradle, Maven, NPM, or Pip)

  • Proficiency with Git and modern version control workflows (branching, merging, pull requests)

  • Experience working in Agile environments using JIRA and Confluence

Preferred Qualifications

  • Master's degree in Computer Science or a related field

  • Experience with AWS cloud services (EC2, RDS, S3, SQS, Lambda, etc.)

  • Familiarity with containerization technologies (Docker, Kubernetes)

  • Experience implementing observability and monitoring using Prometheus, Grafana, or the ELK stack

  • Experience optimizing backend performance and implementing caching (Redis, Memcached)