Sr Full Stack Engineer (.NET)

Software Guidance & Assistance, Inc., (SGA), is searching for a Senior UI Engineer for a Contract assignment with one of our premier Regulatory clients in Rockville, MD.

This position is hybrid (3 days per week onsite) - Tysons (preferred) or Rockville office
Must be local to DC Metro area.

Core Technical Requirements
.NET Full Stack Development (.NET Framework 4.7.2)
Primary Backend: .NET Framework 4.7.2, C#, WCF Services,ASP.NET
Primary Frontend:ASP.NETWeb Forms,ASP.NETMVC, Razor
Related Technologies:
o UI Frameworks:ASP.NETWeb Forms (.aspx), Master Pages, User Controls (.ascx)
o AJAX: AJAX Control Toolkit, UpdatePanel, ScriptManager
o MVC:ASP.NETMVC 4.0/5.2.3, Razor view engine
o Client-Side: JavaScript, jQuery (1.7.2, 1.9.1, 3.2.1), jQuery UI, jQuery Validation
o CSS Frameworks: Semantic UI, jQuery UI themes, custom stylesheets
o Reporting: ActiveReports/MESCIUS ActiveReports (v10, v18)
o Web APIs: RESTful services, SOAP, WCF
o Databases: Oracle, PostgreSQL
o AWS Technology: AWS SQS & SES
o Modern Stack (for migration): .NET Core/.NET 6+,ASP.NETCore

Frontend Development (React Native)
Primary: React Native, JavaScript/TypeScript, React
Related Technologies:
o State Management: Redux, Redux Toolkit
o Navigation: React Navigation
o UI Components: React Native Paper, Native Base, React Native Elements
o Build Tools: Metro, Expo
o Mobile APIs: Camera, Geolocation, Push Notifications
o React Hooks & functional components
o Responsive design & cross-platform development (iOS/Android)
o Web: React.js, Next.js (bonus)

Testing & Quality Assurance
Primary: Selenium, Playwright
Related Technologies:
o Unit Testing: xUnit, NUnit, MSTest (for .NET), Jest, react-native-testing-library(for React/React Native)
o Integration Testing: Selenium, Appium, Playwright
o API Testing: Postman, SoapUI, Swagger
o Mocking: axios-mock-adapter, NSubstitute, Mock Service Worker
o Test Runners: TestNG, Cucumber
o Performance Testing: JMeter, Gatling
o Code Coverage: SonarQube

Cloud Technologies (AWS)
Required: Experience designing, deploying, and maintaining applications on AWS cloud platform, including services such as EC2, ECS, S3, DMS, RDS, Lambda, CloudFormation

AI & LLM Technologies
Primary: Experience leveraging AI-assisted development tools and Large Language Models for software engineering tasks

Related Technologies:
o AI-Powered Development: Amazon Q Developer, GitHub Copilot, Amazon CodeWhisperer, Tabnine, or similar AI code assistants
o Agentic AI: Experience with autonomous AI agents for development workflows
o AI Integration: REST APIs for LLM services, prompt engineering, context management
o AI Use Cases: Code generation, code review, documentation generation, test case creation, debugging assistance, refactoring support

Responsibilities :
Maintain and enhance existing .NET Framework 4.7.2 applications includingASP.NETWeb Forms, Master Pages, User Controls, and WCF Services
Develop and maintain complex web UIs usingASP.NETWeb Forms, AJAX Control Toolkit, and jQuery
Build and maintainASP.NETMVC components with Razor views
Develop cross-platform mobile applications for iOS and Android using React Native
Create and maintain reporting solutions using ActiveReports
Build and maintain RESTful APIs, SOAP services, and WCF services
Design and implement AWS cloud solutions with high availability and scalability
Implement comprehensive automated testing strategies including unit, integration, and end-to-end tests
Write clean, maintainable, and well-documented code following best practices
Collaborate with product managers, designers, and other engineers to deliver high-quality solutions
Actively participate in conduct code reviews
Optimize application performance, security, and scalability across legacy and modern platforms
Participate in architecture and design decisions, including modernization strategies
Troubleshoot and resolve complex technical issues in both frontend and backend environments
Contribute to DevOps practices and CI/CD pipeline improvements

Required Skills:
7+ years of professional software development experience
3+ years of hands-on experience with .NET Framework, includingASP.NETWeb Forms and WCF Services
Strong experience withASP.NETWeb Forms UI development (.aspx, Master Pages, User Controls)
Proficiency with JavaScript, jQuery, and AJAX technologies
Experience withASP.NETMVC and Razor view engine
3+ years of experience with React Native development
2+ years of experience with automated testing frameworks (Selenium, Playwright)
3+ years of experience with AWS cloud services
Strong understanding of software design patterns and SOLID principles
Experience with version control systems (Git/Bitbucket)
Proficiency in SQL and database design
Experience with Agile/Scrum methodologies
Strong problem-solving and analytical skills
Excellent communication and collaboration abilities

Preferred Skills:
Experience with AJAX Control Toolkit and advanced AJAX patterns
Experience with ActiveReports or similar reporting frameworks
Experience migrating legacy .NET Framework applications to .NET Core
AWS certifications (AWS Solutions Architect, AWS Developer, or equivalent)
Experience with containerization (Docker) and orchestration (Kubernetes, ECS)
Experience with Infrastructure as Code tools (Terraform, CloudFormation)
Familiarity with microservices and event-driven architecture
Understanding of security best practices, OWASP guidelines, and AWS security
Experience with CI/CD pipelines (Jenkins, GitHub Actions)
Experience with monitoring and logging tools (AWS CloudWatch, Splunk)
Knowledge of cost optimization strategies in AWS environments
Contributions to open-source projects
Bachelor's degree in Computer Science or related field (or equivalent experience)

SGA is a technology and resource solutions provider driven to stand out. We are a women-owned business. Our mission: to solve big IT problems with a more personal, boutique approach. Each year, we match consultants like you to more than 1,000 engagements. When we say let's work better together, we mean it. You'll join a diverse team built on these core values: customer service, employee development, and quality and integrity in everything we do. Be yourself, love what you do and find your passion at work. Please find us at .

SGA is an Equal Opportunity Employer and does not discriminate on the basis of Race, Color, Sex, Sexual Orientation, Gender Identity, Religion, National Origin, Disability, Veteran Status, Age, Marital Status, Pregnancy, Genetic Information, or Other Legally Protected Status. We are committed to providing access, equal opportunity, and reasonable accommodation for individuals with disabilities in employment, and our services, programs, and activities. Please visit our company to request an accommodation or assistance regarding our policy.

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