Full Stack.NET Developer

Overview

Onset is seeking an experienced Full Stack .NET Developer to support the Texas Health and Human Services Commission (HHSC). The ideal candidate will be responsible for designing, developing, enhancing, and supporting enterprise applications and reporting solutions using modern Microsoft technologies. This role requires extensive experience with .NET Core, C#, React JS, SQL Server, Oracle, Power BI, and Azure cloud technologies while collaborating with business stakeholders and cross-functional IT teams to deliver secure, scalable, and high-performing enterprise applications.

The developer will perform advanced analysis, application design, coding, testing, deployment, maintenance, and production support activities while working independently in an Agile development environment.

• Design, develop, enhance, and maintain enterprise applications using .NET Core, C#, React JS, JavaScript, HTML, and CSS.
• Develop RESTful APIs and backend services using .NET Core.
• Design, develop, and optimize SQL Server databases, including stored procedures, views, functions, and query performance tuning.
• Perform Oracle database support and migrate legacy Oracle data into SQL Server environments.
• Develop and maintain Power BI dashboards, reports, and paginated reports for operational and business reporting.
• Design, implement, and support cloud-based solutions using Microsoft Azure, including deployment, monitoring, storage, and security.
• Troubleshoot, diagnose, and resolve application issues across the full technology stack.
• Develop and execute unit testing, integration testing, system testing, and support regression testing activities.
• Transform and migrate legacy applications and data into modern web-based enterprise solutions.
• Monitor application performance, reliability, security, and data integrity while proactively resolving issues.
• Create and maintain technical documentation including solution designs, architecture diagrams, technical specifications, and operational procedures.
• Utilize Git, CI/CD pipelines, and Dev Ops tools to automate builds, deployments, and testing.
• Collaborate with infrastructure, security, architects, business analysts, and stakeholders to deliver enterprise solutions.
• Participate in Agile ceremonies including sprint planning, backlog refinement, development, and release activities.
• Contribute to coding standards, solution architecture, and development best practices.
• Provide technical guidance and mentorship to junior developers and team members.
• Support enterprise initiatives while ensuring compliance with accessibility standards, security policies, and organizational best practices.

• 11+ years of full stack application development using:
  • .NET Core
  • C#
  • React JS
  • Java Script
  • HTML
  • CSS
• 11+ years of experience with SQL Server including:
  • Data modeling
  • Query optimization
  • Stored procedures
  • Performance tuning
• 11+ years of Oracle database experience including legacy data migration to SQL Server.
• 11+ years of experience developing Power BI dashboards, paginated reports, and data transformation solutions.
• 11+ years of hands‑on experience with Microsoft Azure cloud services, including application hosting, storage, deployment, and security.
• 11+ years of experience converting legacy applications into modern web‑based solutions.
• 11+ years of experience performing legacy data transformation and migration activities.
• 11+ years of experience with Git, CI/CD pipelines, and Dev Ops tools.
• Strong experience with application troubleshooting, production support, and enterprise application development.
• Knowledge of accessibility standards, including Section 508 compliance.
• Excellent analytical, communication, collaboration, and problem‑solving skills.

• 8+ years of experience performing data migrations within government or highly regulated environments.
• 8+ years of experience working in Agile/Scrum development environments.
• 6+ years of experience supporting Texas state agencies, healthcare organizations, or other public sector clients.
• Experience designing scalable cloud‑native enterprise applications.
• Experience with enterprise reporting, technical architecture, and application modernization initiatives.

• .NET Core Development
• React JS
• C#
• SQL Server
• Oracle
• Azure Cloud
• Power BI
• REST APIs
• CI/CD Pipelines
• Git
• Dev Ops
• Data Migration
• Legacy Application Modernization
• Enterprise Application Development
• Agile/Scrum
• Application Performance Tuning
• Technical Documentation
• Cloud Solutions
• Enterprise Reporting
• Section 508 Accessibility

• Must be authorized to work in the U.S.
• Must be able to work onsite in Austin, Texas as required.