What are the responsibilities and job description for the Senior Web Backend Developer (.NET / C#) position at Avid Systems LLC?
About Avid Systems
Avid Systems is a Washington, DC-based managed services provider specializing in IT staff augmentation, business application development, cloud enablement, infrastructure, mobility, virtualization, cybersecurity, storage, and managed IT services. Since 2004, Avid Systems has supported government and commercial clients by delivering skilled technical talent and innovative technology solutions.
Job Description
Avid Systems is seeking experienced Senior Web Backend Developers to support major digital modernization initiatives for the Washington Metropolitan Area Transit Authority (WMATA).
This position will support WMATA's Web Modernization Project and SmarTrip Mobile App 2.0 Project, focusing on backend application development, API integration, system enhancements, and enterprise application modernization.
The selected candidates will help develop and maintain the backend services supporting WMATA's public-facing digital platforms, including wmata.com, smartrip.wmata.com, and the SmarTrip mobile applications for iOS and Android.
The ideal candidate will have strong experience with C#, .NET, backend development, REST APIs, enterprise applications, and secure software development practices.
Key Responsibilities
- Design, develop, test, and maintain enterprise backend applications and services using C# and .NET technologies.
- Develop and integrate backend APIs and services supporting WMATA's website and SmarTrip mobile applications.
- Collaborate with technical teams to translate business requirements into scalable, reliable application solutions.
- Support application modernization, system integration, configuration, testing, deployment, and production implementation.
- Analyze existing systems and recommend improvements to performance, functionality, reliability, and security.
- Develop and maintain multi-tier applications, web services, APIs, and database integrations.
- Troubleshoot complex application issues and implement appropriate technical solutions.
- Prepare and maintain technical design documentation and participate in architecture and code reviews.
- Perform secure code reviews, application hardening, and vulnerability remediation.
- Support enhancements to WMATA's General Orders Track Rights System and Site-Specific Work Plan applications.
- Ensure applications comply with established development standards, security policies, and best practices.
Required Qualifications
- Bachelor's degree in Computer Science, Information Systems, Mathematics, Business, Public Administration, or a related discipline.
- 5 years of professional backend software development experience, including C# and .NET technologies.
- 5 years of experience with software development methodologies, tools, and project management practices.
- Strong knowledge of REST APIs, web services, database systems, and enterprise application architecture.
- Experience developing and supporting multi-tier enterprise applications.
- Experience with software design, development, testing, integration, debugging, and troubleshooting.
- Demonstrated ability to take ownership of complex technical assignments and deliver reliable software solutions.
- Strong analytical, problem-solving, documentation, and communication skills.
Preferred Qualifications
- Experience developing or supporting applications in transportation, transit, or other large public-sector environments.
- Experience with WMATA's General Orders Track Rights System or Site-Specific Work Plan applications.
- Familiarity with Jira, Confluence, and TestRail.
- Experience with Git and collaborative development tools.
- Knowledge of secure coding standards, code reviews, application security, and vulnerability remediation.
- Master's degree in Computer Science, Information Technology, or a related field.
Work Location & Schedule
- Location: Alexandria, VA – near Eisenhower Avenue Metro Station
- Work Arrangement: Onsite, five days per week
- Schedule: Full-time, 40 hours per week
- Engagement: Contract position supporting WMATA