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Hourly Freelance Java Developer Jobs in Ashburn, VA

ManTech

Senior Full Stack Developer

Ashburn, VA · Hybrid

$114K - $190K/yr

Proven expertise in Java development, including core Java concepts, object-oriented design ... There are differentiating factors that can impact a final salary/hourly rate, including, but not ...

Base-2 Solutions, LLC

DevOps Software Engineer

Bethesda, MD · On-site

$56.50 - $77.25/hr

Development experience with Bash, PowerShell, SALT, Python, Groovy, Java, etc. * Experience ... Competitive fixed salary or hourly pay (based on experience, skills, location, and internal equity)

ManTech

Senior Full Stack Developer

Ashburn, VA · Hybrid

$114K - $190K/yr

Proven expertise in Java development, including core Java concepts, object-oriented design ... There are differentiating factors that can impact a final salary/hourly rate, including, but not ...

Base-2 Solutions, LLC

DevOps Engineer 3

Bethesda, MD · On-site

$56.50 - $77.25/hr

Development experience with Bash, PowerShell, SALT, Python, Groovy, or Java. * Experience ... Competitive fixed salary or hourly pay (based on experience, skills, location, and internal equity)

Base-2 Solutions, LLC

DevOps Engineer 2

Bethesda, MD · On-site

$56.50 - $77.25/hr

Development experience with Bash, PowerShell, SALT, Python, Groovy, or Java. * Experience ... Competitive fixed salary or hourly pay (based on experience, skills, location, and internal equity)

Base-2 Solutions, LLC

DevOps Software Engineer

Bethesda, MD · On-site

$56.50 - $77.25/hr

... Java. * Experience on a production or enterprise system. * Experience with Kafka or other message ... Competitive fixed salary or hourly pay (based on experience, skills, location, and internal equity)

Base-2 Solutions, LLC

DevOps Software Engineer

Bethesda, MD · On-site

$56.50 - $77.25/hr

Experience with development languages such as Bash, PowerShell, SALT, Python, Groovy, Java, etc ... Competitive fixed salary or hourly pay (based on experience, skills, location, and internal equity)

USM

Drupal Developer - Face to face must

Washington, DC

$45 - $50/hr

Dec 31st 2017 (potential to extend) Hourly Rate: $45-50/hour MUST BE LOCAL FACE TO FACE REQUIRED ... Drupal custom module development Experience using Web APIs Experience using client side Java Script ...

Base-2 Solutions, LLC

DevOps Engineer Level 4

Bethesda, MD · On-site

$56.50 - $77.25/hr

... or Java. * Experience supporting a production or enterprise system. * Experience with Kafka or ... Competitive fixed salary or hourly pay (based on experience, skills, location, and internal equity)

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How much do hourly freelance java developer jobs pay per hour?

As of Sep 7, 2026, the average hourly pay for hourly freelance java developer in Ashburn, VA is $57.98, according to ZipRecruiter salary data. Most workers in this role earn between $50.14 and $64.90 per hour, depending on experience, location, and employer.

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Senior Full Stack Developer

ManTech International

Ashburn, VA • On-site

$114K - $190K/yr

Full-time

Medical, Life, Retirement, PTO

Re-posted 7 days ago

Key responsibilities

  • Lead and perform development and maintenance of end-user focused, data-driven analytic applications to support CBP threat analysis and targeting.

  • Design, develop, and implement scalable, high-performance applications and microservices using Java and modern JavaScript frameworks, and develop and consume RESTful APIs.

  • Develop, manage, and optimize CI/CD pipelines for automated builds, testing, and deployments.

ManTech rating

8.8

Company rating: 8.8 out of 10

Based on 15 frontline employees who took The Breakroom Quiz

48th of 247 rated software companies

Job description

General information
Requisition #
R69687
Locations
USA-VA-Ashburn
Posting Date
07/31/2026
Security Clearance Required
Top Secret
Remote Type
Hybrid
Time Type
Full time
Description & Requirements
Unlock the secrets of intelligence with MANTECH! Join a dynamic team at the forefront of national security, providing advanced solutions to government intelligence agencies. Since 1968, we've been solving the toughest challenges with groundbreaking tech. Explore thrilling projects in Digital Transformation, Cybersecurity, IT, Data Analytics and Software Development. Elevate your career and make a difference. Your adventure begins now-unleash your potential with MANTECH!
MANTECH seeks a motivated, career- and customer-oriented Senior Full Stack Developer to join our AI innovation team in Ashburn, VA. This is currently a hybrid position with 2-3 days onsite/week.
Each day U.S. Customs and Border Protection (CBP) oversees the massive flow of people, capital, and products that enter and depart the United States via air, land, sea, and cyberspace. The volume and complexity of both physical and virtual border crossings require the application of solutions to aid officers in detecting threats while promoting efficient trade and travel.
Responsibilities include but are not limited to:
  • Lead and perform development and maintenance of end-user focused, object-oriented, data-driven analytic applications to support CBP threat analysis and targeting in an agile environment.
  • Design, develop, and implement scalable, high-performance and reliable applications and microservices using Java (including frameworks like Spring Boot, Jakarta etc.) for the backend and modern JavaScript frameworks (e.g. React, Angular, Vue.js) for the frontend.
  • Contribute to all phases of the software engineering lifecycle (SELC), including requirements gathering, architecture design, coding, testing, deployment, and maintenance.
  • Develop and consume RESTful APIs and ensure seamless integration between front-end and backend systems.
  • Develop new code, modify existing application code, conduct unit and system testing, and engage in rigorous documentation of developed and delivered application use cases, data flows, and functional operations.
  • Develop, manage, and optimize CI/CD pipelines (e.g. using Jenkins, Gitlab CI, Harness) for automated builds, testing, and deployments.
  • Demonstrate a strong practical understanding to integrate rapid deployment process of AI/ML services into application delivery framework for targeting.

Minimum Qualifications:
  • HS Diploma/GED and 15-20 years or AS/AA and 13-18 years or BS/BA and 7-12 years or MS/MA/MBA and 5-9 years or PhD/Doctorate and 3-7 years.
  • Proven expertise in Java development, including core Java concepts, object-oriented design principles/patterns and modern frameworks (e.g. Spring Boot, Spring Framework).
  • Hands on experience developing Micro Services architecture patterns including building and deploying containerized applications (Docker, Kubernetes).
  • Experience with messaging queues such as gRPC, RabbitMQ, Kafka.
  • Hands-on experience setting up, configuring, and maintaining CI/CD pipelines for automated application delivery using Harness or Jenkins.
  • Experience with RESTful API design and development.
  • Solid communication and interpersonal skills, with the ability to collaborate effectively within a team.

Preferred Qualifications:
  • Experience with cloud platforms such as AWS and related cloud services (e.g. EC2, S3, Lambda, RDS, EKS).
  • Experience working with relational databases (e.g. Oracle, PostgreSQL) and/or NoSQL databases (e.g. MongoDB).
  • Hands on experience leveraging distributed data/computing tools including Hadoop, Spark, Impala, MySQL, Elasticsearch, Solr, etc.
  • Experience working in Agile/Scrum development methodology.
  • Solid understanding of software development lifecycles.

Clearance Requirements:
  • Must be a U.S. citizen with a current/active Top-Secret clearance and the ability to obtain and maintain DHS CBP suitability prior to starting this position.

Physical Requirements:
  • The person in this position needs to occasionally move about inside the office to access file cabinets, office machinery, or to communicate with co-workers, management, and customers, which may involve delivering presentations.

The projected compensation range for this position is $114,600.00-$190,200.00. There are differentiating factors that can impact a final salary/hourly rate, including, but not limited to, Contract Wage Determination, relevant work experience, skills and competencies that align to the specified role, geographic location (For Remote Opportunities), education and certifications as well as Federal Government Contract Labor categories. In addition, MANTECH invests in its employees beyond just compensation. MANTECH's benefits offerings include, dependent upon position, Health Insurance, Life Insurance, Paid Time Off, Holiday Pay, short-term and long-term Disability, Retirement and Savings, Learning and Development opportunities, wellness programs as well as other optional benefit elections.
MANTECH considers all qualified applicants for employment without regard to disability or veteran status or any other status protected under any federal, state, or local law or regulation.
If you need a reasonable accommodation to apply for a position with MANTECH, please email us at careers@mantech.com and provide your name and contact information.

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