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Justin Bransfield

@justinbransfield1

I build and modernize .NET backend systems, APIs, data migrations, and critical platform infrastructure.

United States
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I've built and maintained .NET applications at TrainerRoad across the product website, REST APIs, backend jobs, and integrated microservices hosted in Azure. I also contributed to Python microservices serving ML data through internal REST APIs.

I modernized critical systems by leading .NET Framework-to-.NET Core migrations, expanding test coverage, and coordinating SQL schema changes and large-scale data backfills without downtime. I also took ownership of legacy payment and subscription code, improving its practices and coverage.

At TCGPlayer, I overhauled inventory systems around microservice domains and Kafka events, using a parallel migration strategy to move from legacy systems with minimal disruption. I also redesigned pricing tooling with asynchronous jobs and message queues, reducing user wait times from minutes to seconds.

My work spans full-stack delivery, production debugging, SQL query-plan analysis, observability, and AI-assisted engineering workflows. I bring nearly thirteen years of experience across .NET, Azure, SQL Server, and backend-focused platform development.

Experience

Work history, roles, and key accomplishments

TR
Current

Senior Software Engineer

TrainerRoad

Nov 2021 - Present (4 years 10 months)

Developed and maintained .NET applications hosted in Azure, including REST APIs, backend jobs, and microservices. Led migration to .NET Core, overhauled payment processing, and implemented AI-assisted internal tools.

FL

Web Developer

Fairfax Data Systems, LLC

Feb 2014 - Dec 2015 (1 year 10 months)

Implemented web sites and software integrations with Connecticut State agency systems such as DEP.

CL

Developer Intern (.NET)

CDS Business Mapping, LLC

Sep 2012 - Jan 2014 (1 year 4 months)

Aided in developing billing and testing systems for a proprietary insurance risk-assessment tool.

Education

Degrees, certifications, and relevant coursework

Central Connecticut State University logoCU

Central Connecticut State University

Bachelor of Arts, Mathematics

Bachelor of Arts in Mathematics from Central Connecticut State University, completed in 2012.

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