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Full Stack Java Software Engineer III

Job Details
Silver, MD Full Time
POSTED ON 9/30/2025
AVAILABLE BEFORE 11/30/2025

Systems Integration & Development (SID) is an award-winning IT solutions provider headquartered in McLean, VA seeking a Full Stack Java Software Engineer. This is hybrid 3 days onsite in Silver Spring, MD.

Roles and Responsibilities

  • Build, enhance, and maintain software applications, APIs, and dissemination tools using Java, Python, SQL, PL/SQL, Perl, and related technologies in a Linux/UNIX environment.
  • Develop and maintain responsive websites and web applications using HTML, CSS, JavaScript, Bootstrap, jQuery, Leaflet, and Web Services; contribute to mobile application development initiatives.
  • Design, implement, and support RESTful and SOAP-based Web Services for data retrieval, processing, and integration with other systems.
  • Participate in all stages of the SDLC, including requirements gathering, design, coding, testing, documentation, implementation, and maintenance.
  • Responsible for testing of code
  • Contribute to cloud-based application development (AWS or other environments)
  • Monitor application performance, provide troubleshooting support using browser Developer Tools, and work closely with administrators to ensure high availability.
  • Create and maintain clear documentation for systems, applications, APIs, and operational procedures.
  • Identify opportunities to improve existing processes, systems, and applications while ensuring adherence to deadlines and development goals.
  • Additional duties as assigned.

  • 4 years using Java, Python, SQL, and other high level programming languages in a primarily Linux/UNIX based environment.
  • Bachelors Degree in computer science, physical sciences, mathematics, engineering or related discipline, or equivalent; preferred.
  • Must have or be able to obtain a Public Trust for this position.
  • Experience developing enhancements to existing applications and work on larger projects involving the development of software.
  • Experience creating Web Services, that have been used in production settings; with Linux/Unix, is preferable
  • Experience developing and maintaining applications and dissemination tools (i.e. APIs) using Java, Python, PL/SQL, CGI, Perl and relational databases.
  • Experience developing and maintaining websites with HTML, CSS, JavaScript, Bootstrap, leaflet, jQuery, Web services
  • Experience in Mobile Application Development is a plus
  • Experience in Web Service technologies such as SOAP/WSDL and REST developing RESTful APIs for data retrieval and Web Applications
  • Experience with AWS or other cloud environments
  • Maintain existing data processing applications, including APIs, websites, and dissemination tools
  • Must be able to meet assigned development goals with a high quality of output and meet target delivery dates
  • Proficient in the use of browser Developer Tools for troubleshooting

Systems Integration & Development (SID) offers a unique, stimulating and challenging environment that fosters individual growth and rewards performance. Systems Integration & Development (#SID) is an Equal Opportunity Employer.  

Some of our competitive benefits include

  • Generous Paid Time Off (PTO) and all Federal Holidays off
  • Comprehensive Health Coverage
  • Retirement Savings Plan
  • Pre-Tax Benefit Programs
  • Wellness and Work-Life Support
  • Professional Development
  • Performance and Referral Bonuses
  • Life and Disability Insurance

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