Open to opportunities

Jonathan Stevenson

@jonathanstevenson

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Senior full-stack .NET developer architecting cloud-native solutions that drive measurable business outcomes.

United States

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What I'm looking for

I’m looking for an Agile team where I can lead cloud-native .NET delivery, mentor engineers, and drive measurable outcomes. I want ownership of scalable APIs/microservices, strong CI/CD practices, and the freedom to modernize legacy systems with clean architecture.

I’m a Senior Full-Stack .NET Developer with 12+ years of experience architecting cloud-native applications across financial services, healthcare, logistics, and emerging tech. I focus on building scalable, secure systems with practical outcomes—whether that’s improving patient care through HIPAA-compliant telehealth or modernizing fintech for global scalability.

Recently at ATH Infosystems, I led backend development for a full-service telemedicine solution integrating real-time video consults, e-prescriptions, and insurance processing—driving a 270% revenue increase. At Castle Harlan, I delivered a trading dashboard and custom CRM with seamless bank integrations that enabled 35% business growth, and I’ve consistently shipped high-impact features using REST APIs, microservices, and real-time communication.

I thrive in Agile teams where I mentor engineers and champion CI/CD adoption. From migrating legacy systems to modern .NET Core + React stacks to designing microservices on Kubernetes and integrating Azure/AWS services, I aim to reduce defects, improve performance, and streamline delivery while maintaining clean architecture and secure engineering practices.

Experience

Work history, roles, and key accomplishments

Current

Senior .NET Solutions Engineer

Current

ATH Infosystems

Jul 2022 - Present (3 years 11 months)

Architected backend services for a transport management system using ASP.NET Core and REST APIs to enable real-time driver tracking. Led HIPAA-compliant telemedicine development with SignalR and Twilio, contributing to a 270% increase in client revenue; also migrated legacy MVC to a .NET Core + React stack and automated CI/CD with Azure DevOps to cut release times by 60%.

ASP.NET Core REST APIs SignalR Twilio Angular Azure Functions Azure DevOps CI CD

Senior .NET Developer

Castle Harlan

Jul 2021 - Jun 2022 (11 months)

Built a custom CRM system with ASP.NET Core, SQL Server, and Asterisk integrations, automating insurance workflows to drive business growth. Developed a real-time trading dashboard using Angular and WebSockets, and designed a cloud-native fintech platform on AWS; also improved performance with Redis caching and Entity Framework Core for high-volume transaction processing.

ASP.NET Core SQL Server WebSockets Angular AWS RxJS NgRX Redis Entity Framework Asterisk Integrations

Lead .NET Developer

The Merriman

Jun 2017 - Jun 2021 (4 years)

Led microservices architecture and implementation with .NET Core and Kubernetes, achieving 99.99% uptime and reducing deployment effort. Engineered a Blazor-based HIPAA-compliant patient portal supporting 4,000+ concurrent users and implemented secure JWT authentication and scalable dashboards for high-volume healthcare transactions.

.NET Core Kubernetes Microservices Blazor JWT React Azure Services SQL Server MVVM

.NET Developer

AtNetPlus

Aug 2014 - May 2017 (2 years 9 months)

Contributed to cloud migration by transitioning on-premise applications to Azure App Services, reducing infrastructure costs and improving scalability. Built inventory management solutions with PostgreSQL and Entity Framework and developed a Xamarin.Forms mobile inventory app that increased field team productivity by 25%.