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I'm a Senior .NET Developer and Solution Architect with a decade of hands-on experience building scalable, cloud-native applications. I specialize in C#, .NET frameworks, microservices, and front-end technologies like Angular and React, with robust work in Azure and AWS. I’ve led initiatives to align software with Healthcare standards such as HIPAA, FHIR, EHR, and HL7, delivering secure, interoperable systems. I’ve steered cross-functional teams, delivered mission-critical healthcare solutions, and driven performance improvements and revenue growth. I value clean architecture, test-driven development, and DevOps practices that ensure reliable releases and scalable systems.…I'm a Senior .NET Developer and Solution Architect with a decade of hands-on experience building scalable, cloud-native applications. I specialize in C#, .NET frameworks, microservices, and front-end technologies like Angular and React, with robust work in Azure and AWS. I’ve led initiatives to align software with Healthcare standards such as HIPAA, FHIR, EHR, and HL7, delivering secure, interoperable systems. I’ve steered cross-functional teams, delivered mission-critical healthcare solutions, and driven performance improvements and revenue growth. I value clean architecture, test-driven development, and DevOps practices that ensure reliable releases and scalable systems.

Donnell Ray

Full Stack Developer, Back-End Developer, Web Developer, +2

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I'm a Senior .NET Developer and Solution Architect with a decade of hands-on experience building scalable, cloud-native applications. I specialize in C#, .NET frameworks, microservices, and front-end technologies like Angular and React, with robust work in Azure and AWS. I’ve led initiatives to align software with Healthcare standards such as HIPAA, FHIR, EHR, and HL7, delivering secure, interoperable systems. I’ve steered cross-functional teams, delivered mission-critical healthcare solutions, and driven performance improvements and revenue growth. I value clean architecture, test-driven development, and DevOps practices that ensure reliable releases and scalable systems.…I'm a Senior .NET Developer and Solution Architect with a decade of hands-on experience building scalable, cloud-native applications. I specialize in C#, .NET frameworks, microservices, and front-end technologies like Angular and React, with robust work in Azure and AWS. I’ve led initiatives to align software with Healthcare standards such as HIPAA, FHIR, EHR, and HL7, delivering secure, interoperable systems. I’ve steered cross-functional teams, delivered mission-critical healthcare solutions, and driven performance improvements and revenue growth. I value clean architecture, test-driven development, and DevOps practices that ensure reliable releases and scalable systems.

Available to hire

I’m a Senior .NET Developer and Solution Architect with a decade of hands-on experience building scalable, cloud-native applications. I specialize in C#, .NET frameworks, microservices, and front-end technologies like Angular and React, with robust work in Azure and AWS. I’ve led initiatives to align software with Healthcare standards such as HIPAA, FHIR, EHR, and HL7, delivering secure, interoperable systems.

I’ve steered cross-functional teams, delivered mission-critical healthcare solutions, and driven performance improvements and revenue growth. I value clean architecture, test-driven development, and DevOps practices that ensure reliable releases and scalable systems.

Skills

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Work Experience

Team Lead at Emory Healthcare

October 1, 2025 - October 1, 2025

Developed a secure EHR system using C#, .NET Core 6, Angular 16, TypeScript, and FHIR interoperability. Implemented HIPAA-compliant security with encryption, audit logging, and strict access controls. Engineered 40+ REST APIs for the Appointment Scheduling System with HL7 messaging, including availability checks, automated email/SMS reminders, and third-party calendar integration. Led the creation of five front-end applications with Angular 6 and Kendo UI, enhancing accessibility for users with disabilities and supporting over 1,000 active users weekly. Integrated Microsoft Dynamics 365 to streamline CRM, improving data accessibility across departments. Migrated legacy systems to .NET Core 6 to boost performance and scalability and introduced Dependency Injection to improve modularity and testability. Implemented TDD using NUnit 3.13 and Moq 4.18, with Cypress end-to-end tests, reducing production issues. Designed complex T-SQL queries and stored procedures for the Medical Research Dat

Senior Backend Engineer at CGI

June 1, 2023 - June 1, 2023

Developed robust back-end solutions using .NET Core 6 and Python, leveraging Azure Functions and AKS to improve reliability, scalability, and performance of enterprise applications. Maintained and extended over 10 front-end apps with React.js, Vue.js, jQuery, and Blazor, ensuring responsive interfaces in collaboration with design teams. Shaped cloud architecture with Azure Logic Apps, Azure Service Bus, Azure Event Grid, and Azure API Management to optimize system integration. Orchestrated WCF services for distributed communication and integrated Apache Kafka for real-time event streaming, enhancing microservices responsiveness. Optimized MS SQL Server performance via 5,000+ lines of T-SQL and 20 stored procedures; leveraged EF Core and Dapper to reduce database load by ~25%. Implemented robust logging/monitoring with Datadog across 10 critical applications, accelerating issue resolution. Adopted Kanban for project execution and mentored a 15-person team, contributing to on-time delive

Backend Engineer at SOLTECH

November 1, 2020 - November 1, 2020

Designed and implemented scalable backend and frontend solutions using .NET, Node.js, and AngularJS for multiple clients in AWS. Delivered 15 resilient SOAP and REST services supporting thousands of daily transactions. Built a data-driven UI with Kendo UI Grid for over 1,000 users, enabling efficient data management with sorting, filtering, and paging. Created a centralized NuGet repository to streamline package delivery across five teams. Optimized repository access with LINQ, resulting in faster queries. Leveraged AWS services such as EKS, CloudFront, CloudFormation, CloudWatch, and DynamoDB to improve performance and scalability. Implemented Jasmine and Cypress test strategies achieving high coverage (around 90%) across three projects. Worked in a 15-developer team using Git and Jira to manage workflow.

Software Engineer at JPMorgan Chase & Co.

October 1, 2017 - October 1, 2017

Developed C/C++ code for a Document Management System (DMS) used across five business units. Leveraged AWS Lambda, S3, and RDS to improve reliability and scalability. Revamped DMS data retrieval by designing 20+ SQL queries in PostgreSQL, enhancing accuracy and reducing errors in financial analysis. Architected data interchange using JSON and XML messaging; identified bottlenecks and reduced transaction latency by over 25 milliseconds. Conducted rigorous code reviews with senior developers, ensuring performance and security, resulting in a 40% reduction in critical vulnerabilities identified during audits.