1

Freelance Java Backend Developer Jobs in Washington

Be Seen First

Sr Java Developer

Ashburn, VA · On-site

$135K - $165K/yr

Backend Developer (Senior) Ashburn, VA (2 days a week in the office) MUST BE A US CITIZEN Position ... the Mid-Level Java Developer will participate in the system architecture design, systems ...

Implement and maintain Java Spring Boot microservices aligned to Government-approved requirements ... Strong backend engineering competencies in secure microservice development, API enablement, and ...

Backend Developer

Bethesda, MD · On-site

$110 - $115/hr

Implement and maintain Java Spring Boot microservices aligned to Government-approved requirements ... Strong backend engineering competencies in secure microservice development, API enablement, and ...

Implement and maintain Java Spring Boot microservices aligned to Government-approved requirements ... Strong backend engineering competencies in secure microservice development, API enablement, and ...

... Java, Python, or Node.js. • Build and maintain relational and NoSQL database schemas, queries ... Computer Science, Engineering, or related field. • 3 years of backend development. • ...

Back End Developer (HYBRID)

Annapolis, MD · On-site

$129.49 - $206.03/hr

As a Back End Developer, you'll have the opportunity to work alongside some of the brightest minds ... Develop RESTful APIs and backend components using Python, Java, and C++. * Design and implement ...

Develop RESTful APIs and backend components using Python, Java, and C++. * Design and implement ... Collaborate with software engineers, system engineers, and stakeholders throughout the software ...

Showing results 21-40

Freelance Java Backend Developer information

What cities in Washington are hiring for Freelance Java Backend Developer jobs?

Cities in Washington with the most Freelance Java Backend Developer job openings:

Lead Java Backend Engineer - AWS Cloud Migration

System One

Reston, VA • On-site

Contractor

Posted 3 days ago

New


Job description

Lead Software Engineer Location: Reston, VA (Hybrid) Duration: Contract through end of year (extension possible) Candidates must reside in the DMV area.

Overview

We are seeking a Senior Java Backend Developer to support a major AWS cloud migration initiative. This role is ideal for an experienced engineer with deep expertise in Java, Spring Framework, Microservices, AWS Migration, and enterprise-level backend development. The selected candidate will play a key role in designing, developing, and modernizing large-scale applications while mentoring junior engineers and collaborating with cross-functional teams.

Required Qualifications

  • 12+ years of hands-on experience in Java development
  • 8+ years of software design, development, and systems integration experience
  • 3+ years of AWS cloud migration experience (required)
  • Strong expertise with:
    • Java
    • Spring Framework / Spring Boot
    • Spring Batch
    • Microservices architecture
    • IBM MQ
  • Extensive database experience with:
    • SQL
    • Oracle
    • MongoDB
    • PostgreSQL
  • Experience integrating and supporting legacy/web services
  • Strong understanding of SDLC, Agile methodologies, CI/CD, DevSecOps, and automated testing
  • Experience leading technical initiatives and mentoring developers
  • Bachelor's degree in Computer Science, Information Technology, or related field (or equivalent experience)

Key Responsibilities

  • Lead the design, development, testing, and deployment of enterprise applications
  • Drive AWS cloud migration efforts and modernization initiatives
  • Design scalable backend services and microservices architectures
  • Collaborate with Architects, Product Owners, Scrum Masters, and stakeholders to define technical solutions
  • Conduct code reviews and ensure adherence to development standards and best practices
  • Identify technical risks and implement mitigation strategies
  • Support CI/CD implementation and application deployment processes
  • Mentor junior engineers and provide technical leadership across project teams

Preferred Skills

  • Experience with cloud-native application development
  • Knowledge of TDD, BDD, and automated testing frameworks
  • Strong experience with large-scale enterprise applications serving thousands of users
  • Excellent communication and stakeholder management skills
Ref: #851-Rockville-S1


System One logo

About System One

Sourced by ZipRecruiter

System One helps employers get work done more efficiently and economically without compromising quality. Over our 35+ year history, we've helped connect thousands of talented people with innovative companies. The excitement of a perfect fit motivates us every single day.

Industry

Business consulting services and recruiting and staffing services

Company size

5,001 - 10,000 Employees

Headquarters location

Pittsburgh, PA, US