Full Stack Developer - 17268 with Security Clearance

Full Stack Developer Location: Vienna, VA (Hybrid - 3 days onsite/week) Duration: Contract Pay: $70-75/hr (Vienna, VA) | $64-70/hr (Pensacola, FL) Position Summary Seeking a senior Full Stack Developer with extensive experience designing, developing, modernizing, and supporting enterprise applications. The ideal candidate will have expertise across the Microsoft technology stack, modern frontend frameworks, cloud platforms, databases, and API integrations while working throughout the SDLC. This role involves modernizing legacy applications, developing custom solutions, collaborating with business stakeholders, and supporting production environments. Required Technical Skills Backend

• C# * .NET Framework / .NET Core
• ASP.NET
• REST APIs
• Microservices Frontend
• React.js
• JavaScript
• TypeScript (preferred)
• HTML5
• CSS3 Database
• SQL Server
• SQL
• MongoDB Cloud & Integration
• Microsoft Azure
• Azure Cloud Services
• Azure DevOps
• MuleSoft
• REST APIs Development Tools
• Git
• CI/CD
• Visual Studio
• Azure DevOps Pipelines Core Experience
• End-to-end Full Stack Development
• Enterprise Application Development
• Legacy Application Modernization
• SDLC
• Production Support
• UAT
• Application Deployment
• System Integration
• Performance Optimization
• Root Cause Analysis
• Business Requirements Analysis
• Technical Documentation
• Agile/Scrum Responsibilities
• Design, develop, test, and deploy enterprise full-stack applications.
• Build scalable web applications using C#, .NET, React, JavaScript, SQL Server, MongoDB, Azure, and MuleSoft.
• Modernize legacy applications into modern architectures.
• Translate business requirements into technical solutions.
• Develop APIs and integrations with enterprise systems.
• Support application deployments across development, testing, and production environments.
• Participate in UAT, release management, and production support.
• Perform root cause analysis and troubleshoot production issues.
• Create technical documentation throughout the SDLC.
• Collaborate with business users, architects, QA, and project teams. Required Qualifications
• 10+ years of Full Stack Development experience.
• Strong expertise in C#, .NET, React, JavaScript.
• Experience with SQL Server and MongoDB.
• Azure Cloud development experience.
• Experience integrating applications using MuleSoft or REST APIs.
• Experience modernizing legacy applications.
• Strong SDLC knowledge.
• Experience supporting enterprise production applications.
• Excellent analytical, communication, and problem-solving skills.
• Bachelor's degree in Computer Science, Information Technology, or related field.

Preferred Qualifications

• Experience with Navy Federal systems.
• Experience with Project Portfolio Management (PPM).
• Master's degree.
• Financial services experience.

About Seneca Resources At Seneca Resources, we are more than just a staffing and consulting firm, we are a trusted career partner. With offices across the U.S. and clients ranging from Fortune 500 companies to government organizations, we provide opportunities that help professionals grow their careers while making an impact. When you work with Seneca, you're choosing a company that invests in your success, celebrates your achievements, and connects you to meaningful work with leading organizations nationwide.

We take the time to understand your goals and match you with roles that align with your skills and career path. Our consultants and contractors enjoy competitive pay, comprehensive health, dental, and vision coverage, 401(k) retirement plans, and the support of a dedicated team who will advocate for you every step of the way. Seneca Resources is proud to be an

Equal Opportunity Employer, committed to fostering a diverse and inclusive workplace where all qualified individuals are encouraged to apply.