Job Description
Senior Full-Stack .NET Developer Job Overview
The Senior Full-Stack .NET Developer will be involved in a major modernization effort, moving a mission critical online, self-service portal from a legacy ASP.NET architecture to .NET 8+, modern APIs, Azure cloud services, and a React-based user experience. This is not a maintenance or production support role. This position is for a senior engineer who wants to lead modernization efforts, solve complex technical problems, and help shape the future architecture of an enterprise platform. You will play a key role in technical design decisions, application architecture, cloud integration, and delivery. Our team is intentionally lean. That means ownership matters. You will be expected to take a solution from concept to production, including design, development, testing, deployment, documentation, and operational support. Success in this role requires initiative, accountability, and the ability to work independently. If you enjoy building, leading, and owning outcomes, you will thrive here.
Senior Full-Stack .NET Developer Role and Responsibilities
Application Modernization (Primary Focus):
- Champion the modernization of mission-critical licensing and eligibility applications, transitioning legacy solutions to modern .NET and Azure-based architectures.
- Design and implement scalable, secure, and maintainable application solutions that reduce technical debt and improve long-term supportability.
- Build and evolve API-first integrations and services that enable future platform capabilities.
- Develop cloud-native solutions using Azure App Services, Azure Functions, and related Azure technologies.
- Own the SQL Server platform, including data architecture, performance tuning, data migration, and platform modernization.
- Implement and maintain CI/CD pipelines using Azure DevOps to automate testing, deployment, and release management.
- Drive engineering excellence through code reviews, automation, documentation, and adherence to modern development practices.
- Build and maintain React-based UI components as part of the modernization roadmap.
- Demonstrate a strong understanding of web application rendering patterns, including client-side rendering (CSR), server-side rendering (SSR), component-based architectures, and modern frontend frameworks.
- Integrate third-party services and internal APIs; document every integration cleanly.
- Implement and maintain reporting using SSRS and Power BI.
- Participate in AI integration initiatives - Azure Agentic AI services, Copilot tooling, and chatbot integrations where applicable.
- Write code that your teammates can read and maintain in the future.
- Provide production support and own root-cause analysis when things break.
- Maintain application documentation, deployment runbooks, and user-facing guides.
- Participate in architecture reviews, code reviews, and sprint ceremonies.
- 8+ years of professional .NET development experience - C#, ASP.NET MVC, Web API.
- Demonstrated, hands-on experience migrating legacy ASP.NET applications to modern .NET (6, 7, 8 or 10).
- Production SQL Server experience: stored procedures, T-SQL tuning, schema migrations, data clean-up.
- Hands-on Azure experience in App Services, Function Apps, deployment pipelines, configuration management. Hands-on being defined here as:
- 5+ years of delivering software in Agile (Scrum or Kanban) environments using ADO or GitHub.
- You have modernized a real application - not a proof of concept - from legacy ASP.NET to .NET 6/7/8/10.
- You have designed and maintained RESTful APIs that external systems depend on.
- You have debugged production issues independently, without a team lead walking you through it.
- React experience, specifically building components within an existing application, not greenfield.
- Exposure to .NET 10.
- Power BI or SSRS reporting development.
- Experience with government, healthcare, or public-sector systems. Strong understanding of compliance, auditability, and data sensitivity.
- Familiarity with ADA/WCAG 2.1 AA accessibility standards.
- Exposure to Azure Agentic AI services or integration of AI-driven features in production applications.
- Experience with middleware platforms such as Boomi or MuleSoft.
- Background working with PII data and the security protocols that protect it.
- Bachelor degree in Computer Science, Information Technology, or a related field.
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Numbers & Facts
| Location | Atlanta, Georgia |
| Job Type | Contractor |
| Industry | Staffing/Employment Agencies |
| Salary | $58.77 Per Hour |
| Company Size | 20 to 49 employees |
| Year Founded | 2009 |
| Website | http://www.resolution-tech.com |
Benefits
Paid Sick Days, Parking, 401K, Stock Options, Employee Events, Work From Home, Life Insurance, On Site Cafeteria
About Company
Resolution Technologies is a leader in staffing and consulting. We help clients find top talent to help them meet their key business objectives while positively impacting their bottom line.
Here at Resolution Technologies, we understand that serving our clients and consultants is what matters most and promise to never lose sight of that! We take the time to understand your individual needs through face-to-face interaction and strive to always make sure your objectives are met. Resolution Technologies is a full-service Professional Staffing and Executive Search Firm specializing in Technology, Finance & Accounting, Manufacturing Ops, Human Resources, and Marketing/Sales offering flexible solutions for our clients ranging from contract, contract-to-perm, and direct perm placements. Whatever your needs are, we promise to provide unrivaled quality and service.
Skills
- ASP.NET MVCunmatched
- Application Programming Interface (API)unmatched
- Artificial Intelligence (AI)unmatched
- Automationunmatched
- Cloud Applicationsunmatched
- Cloud Architectureunmatched
- Cloud Computingunmatched
- Code Reviewsunmatched
- Computer Programmingunmatched
- Computer Scienceunmatched
- Configuration Managementunmatched
- Continuous Deployment/Deliveryunmatched
- Continuous Integrationunmatched
- Conversation Engineunmatched
- Data Cleaningunmatched
- Data Migrationunmatched
- Debugging Skillsunmatched
- DevOpsunmatched
- Documentationunmatched
- Enterprise Architectureunmatched
- Governmentunmatched
- Information Technology & Information Systemsunmatched
- Information/Data Security (InfoSec)unmatched
- Internet Applicationunmatched
- Licensingunmatched
- Machine Toolunmatched
- Microsoft .NETunmatched
- Microsoft ASP.NET (Active Server Page)unmatched
- Microsoft C# (C Sharp)unmatched
- Microsoft SQL Serverunmatched
- Microsoft Transact-SQL (T-SQL)unmatched
- Microsoft Windows Azureunmatched
- Operational Supportunmatched
- Performance Tuning/Optimizationunmatched
- Power BIunmatched
- Problem Solving Skillsunmatched
- Production Supportunmatched
- Public Healthunmatched
- REST (Representational State Transfer)unmatched
- Release Management/Engineeringunmatched
- Root Cause Analysisunmatched
- SQL Server Reporting Services (SSRS)unmatched
- Sales Pipelineunmatched
- Security Protocolsunmatched
- Software Designunmatched
- Stored Proceduresunmatched
- Support Documentationunmatched
- Team Lead/Managerunmatched
- Technical/Engineering Designunmatched
- Test Automationunmatched
- Test Plan/Scheduleunmatched
- User Interface/Experience (UI/UX)unmatched
- Web Content Accessibility Guidelines (WCAG)unmatched
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