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Justin Bransfield

@justinbransfield

I build reliable .NET backend systems, APIs, migrations, and payment platforms.

United States
Message

I've built and maintained TrainerRoad's Azure-hosted product website, REST APIs, backend jobs, and integrated microservices, while contributing Python services that deliver ML data internally. I also created AI-assisted engineering tools and agentic workflows, including a browser tool that ingests Datadog errors and dispatches agents to investigate common exceptions.

Previously at TCGPlayer, I modernized inventory, pricing, and payment systems through microservices, Kafka events, streaming workflows, and zero-downtime migrations. Across nearly thirteen years in .NET and the Microsoft stack, I've focused on production debugging, observability, SQL performance, test coverage, and dependable full-stack delivery.

Experience

Work history, roles, and key accomplishments

TR
Current

Senior Software Engineer

TrainerRoad

Nov 2021 - Present (4 years 9 months)

Developed and maintained .NET applications hosted in Azure, including product website, REST APIs, backend jobs, and microservices. Designed AI-assisted internal tools and led migration from .NET Framework to .NET Core.

TC

Senior Software Engineer – Platform Team

TCGPlayer

Jan 2021 - Nov 2021 (10 months)

Led a major overhaul of fundamental inventory systems, defining microservice domains and utilizing Kafka for cross-boundary events. Migrated batch jobs to real-time streaming processes.

TC

Software Engineer III – Inventory Team

TCGPlayer

Jun 2019 - Jun 2020 (1 year)

Redesigned a web-based pricing tool to a microservice-based architecture using message queues and asynchronous jobs, improving user wait times from minutes to seconds. Refactored and expanded functionality of inventory and pricing tools.

TC

Software Engineer

TCGPlayer

Jan 2016 - Jun 2019 (3 years 5 months)

Designed and implemented integration with ACH solution for distributing millions of dollars per week to customers. Implemented feature enhancements and bug fixes across the full stack.

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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