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Kelvin Barnes

@kelvinbarnes

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Senior Full Stack Engineer specializing in cloud-native, AI-enhanced systems.

United States

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What I'm looking for

I seek senior full-stack roles building cloud-native, AI-enhanced systems with strong DevOps, mentoring opportunities, and a collaborative, agile environment focused on measurable business impact.

I am a Senior Full Stack Engineer with 10+ years delivering high-performance, cloud-native applications across fintech, SaaS, and enterprise platforms.

I build scalable backend services using C#/.NET Core, ASP.NET, and NestJS, and craft modern frontends with React and Next.js, emphasizing microservices, event-driven architectures, and production-grade observability.

I have integrated AI features using ML.NET and Azure Cognitive Services to improve user engagement and reduce risk, and I manage CI/CD pipelines, container orchestration on AKS, and infrastructure-as-code with Terraform.

I mentor engineers in clean architecture and full-stack best practices, and I consistently deliver user-focused solutions that balance technical precision with business value.

Experience

Work history, roles, and key accomplishments

Senior Full Stack Engineer

Visa

Sep 2020 - Sep 2025 (5 years)

Designed and deployed .NET 7 and NestJS microservices on AKS with Terraform, integrated Azure Cognitive Services and ML.NET to boost customer engagement by 18%, and reduced MTTR by 40% through improved observability.

C++Net 7 NestJS Azure Terraform ML.NET Cognitive Services Next.js CI CD Application Insights

Full Stack Developer

Luxoft

May 2016 - Sep 2020 (4 years 4 months)

Led migration of .NET monoliths to .NET 6 and NestJS microservices for fintech platforms, integrated ML.NET anomaly detection to cut transaction risk by 22%, and improved API response times by 30% via query and caching optimizations.

C++NestJS gRPC ML.NET Redis SQL Server Next.js Azure Pipelines Terraform

Full Stack Developer

Milliman Inc

Dec 2013 - Mar 2016 (2 years 3 months)

Built ASP.NET Core and Angular retail ERP modules, migrated services to Azure reducing infra costs by 20%, and implemented an Azure ML–backed recommendation engine that increased cross-sell revenue by 12%.

ASP.NET Core Angular Terraform Azure Machine Learning SQL Server EF Core GraphQL Power BI Azure Functions

Frontend Developer

TechMD

Aug 2012 - Nov 2013 (1 year 3 months)

Delivered interactive B2B web apps using AngularJS and React, created a reusable component library that cut frontend development time by 15%, and improved page load times by 20% through performance optimizations.

React AngularJS Backbone.Js Storybook SCSS Webpack Cypress SignalR Jasmine Karma

Education

Degrees, certifications, and relevant coursework

Washington Technology University

Bachelor's Degree, Computer Science

2008 - 2012

Completed a Bachelor's degree in Computer Science with coursework and projects focused on software engineering, web development, and cloud-native architectures.