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John Siegesmund
Executive software engineer specializing in enterprise SaaS and video game development
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About
Veteran software engineer with an unusual path from founding a game development company and shipping dozens of games to rebuilding a B2B product data platform after bankruptcy reduced engineering to a two-person skeleton crew. Particularly strong in legacy modernization, data synchronization, enterprise UI/backend architecture, and customer-safe migrations where old and new systems must coexist in production.
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Key Strengths
- led startup-style engineering rebuild after bankruptcy
- drove large-scale legacy-to-new platform migration
- designed dual-system coexistence with customer-by-customer cutover
- ensured data integrity through service-bus-based synchronization
- strong full-stack architecture across UI, backend services, and databases
- built production UI frameworks and page layouts for enterprise product system
- introduced microservice-style separation and service versioning
- optimized SQL schemas for searchability and scale
- deep B2B product data and publishing workflow expertise
- early-career founder experience in game development
- helped grow engineering team from 2 to 7-8 engineers
- contributed to dozens of shipped video games
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