09/14/2026 updated
100 % available
Senior Full Stack Engineer | React | .NET/C# | Azure | Cloud-Native SaaS
Orange Park, USA
Only remote
Bachelor of Science (B.S.) in Computer ScienceFull Stack Development with React and .NET/C#
Over 10 years of experience building cloud-native SaaS platforms using React and TypeScript on the front end combined with .NET 6/7/8 and ASP.NET Core Web API on the back end, delivering responsive, accessible UI components and robust RESTful APIs.
Cloud Infrastructure and DevOps on Azure
Extensive hands-on work with Azure services including App Service, Container Apps, Functions, Key Vault, and Service Bus, combined with Docker containerization, GitHub Actions, and Azure DevOps Pipelines to build reliable CI/CD workflows and reduce release overhead.
SQL Database Design and Query Optimization
Deep expertise in SQL Server and PostgreSQL, including schema design, stored procedures, indexing strategies, and query tuning that have delivered significant performance improvements such as reducing reporting workloads from 11 seconds to 1.4 seconds and cutting average query time by 62%.
Entity Framework Core and Data Access Patterns
Ownership of Entity Framework Core data access layers with clear repository boundaries, balancing LINQ for everyday queries with raw SQL where performance demands it, keeping business logic cleanly separated from persistence.
Authentication and Security
Implementation of OAuth 2.0 and JWT-based auth flows, application of OWASP secure coding practices covering XSS, CSRF, and SQL injection mitigation, and management of secrets through Azure Key Vault.
Front-End Ecosystem and Component Libraries
Proficiency with React, Redux, React Query, Next.js, Vite, Webpack, Jest, React Testing Library, Playwright, and Storybook, including building and maintaining shared design systems and component libraries used across multiple projects.
End-to-End and Automated Testing
Authoring of end-to-end test suites in Playwright and automated UI tests integrated into CI/CD pipelines via GitHub Actions and Jenkins, catching regressions before they reach customers and enabling weekly production releases.
Accessibility and WCAG Compliance
Conducting accessibility passes on core applications, addressing keyboard navigation and ARIA gaps to bring products within WCAG 2.1 AA compliance.
Agile Collaboration and Code Reviews
Regular collaboration with product managers, designers, and junior engineers through PR reviews, pair programming, and Agile/Scrum practices to break large initiatives into shippable increments and raise the bar on code readability and test coverage.
Over 10 years of experience building cloud-native SaaS platforms using React and TypeScript on the front end combined with .NET 6/7/8 and ASP.NET Core Web API on the back end, delivering responsive, accessible UI components and robust RESTful APIs.
Cloud Infrastructure and DevOps on Azure
Extensive hands-on work with Azure services including App Service, Container Apps, Functions, Key Vault, and Service Bus, combined with Docker containerization, GitHub Actions, and Azure DevOps Pipelines to build reliable CI/CD workflows and reduce release overhead.
SQL Database Design and Query Optimization
Deep expertise in SQL Server and PostgreSQL, including schema design, stored procedures, indexing strategies, and query tuning that have delivered significant performance improvements such as reducing reporting workloads from 11 seconds to 1.4 seconds and cutting average query time by 62%.
Entity Framework Core and Data Access Patterns
Ownership of Entity Framework Core data access layers with clear repository boundaries, balancing LINQ for everyday queries with raw SQL where performance demands it, keeping business logic cleanly separated from persistence.
Authentication and Security
Implementation of OAuth 2.0 and JWT-based auth flows, application of OWASP secure coding practices covering XSS, CSRF, and SQL injection mitigation, and management of secrets through Azure Key Vault.
Front-End Ecosystem and Component Libraries
Proficiency with React, Redux, React Query, Next.js, Vite, Webpack, Jest, React Testing Library, Playwright, and Storybook, including building and maintaining shared design systems and component libraries used across multiple projects.
End-to-End and Automated Testing
Authoring of end-to-end test suites in Playwright and automated UI tests integrated into CI/CD pipelines via GitHub Actions and Jenkins, catching regressions before they reach customers and enabling weekly production releases.
Accessibility and WCAG Compliance
Conducting accessibility passes on core applications, addressing keyboard navigation and ARIA gaps to bring products within WCAG 2.1 AA compliance.
Agile Collaboration and Code Reviews
Regular collaboration with product managers, designers, and junior engineers through PR reviews, pair programming, and Agile/Scrum practices to break large initiatives into shippable increments and raise the bar on code readability and test coverage.
Experience
Professional experience10+ years
Freelancer since2014
Languages
EnglishNative speaker
Project history
Designed and shipped responsive React and TypeScript interfaces for a cloud-native SaaS marketing analytics platform. Built and maintained RESTful APIs in .NET 8 and C# on Azure powering dashboards for 180+ enterprise advertisers with sub-300ms p95 response times. Modeled SQL Server schemas and tuned queries cutting a key reporting workload from 11s to 1.4s. Owned the Entity Framework Core data access layer, containerized services with Docker and Azure Container Apps, authored Playwright end-to-end tests wired into GitHub Actions CI/CD, and hardened auth flows using OAuth 2.0, JWT, and Azure Key Vault.
Contributed to a customer-facing support portal serving Dell commercial clients, building React components and C#/.NET Core APIs handling around 2.3M monthly authenticated requests. Designed SQL Server schemas and stored procedures that dropped average query time by 62%. Built data access using Entity Framework and LINQ, migrated a legacy on-prem service to Docker on Azure App Service, set up automated build and release pipelines in Azure DevOps, and drove a WCAG 2.1 AA accessibility pass on a core admin app.
Delivered full-stack features for client engagements across e-commerce and healthcare, pairing React front ends with C# and Node.js services. Built and consumed RESTful APIs documented with Swagger using OAuth flows. Wrote SQL Server and PostgreSQL queries and stored procedures, including a reporting redesign that reduced nightly job runtime from approximately 3 hours to under 50 minutes. Introduced automated UI tests and contributed to Jenkins-based CI/CD pipelines, and maintained a shared React component library documented in Storybook.