Evan Sosenko is a Senior Software Engineer and startup CTO with 15 years of experience who transitioned from a Physics PhD to lead full-stack engineering and product teams in the San Francisco startup ecosystem. He currently splits his time as Senior Software Engineer at Seam (YC S20) and CTO of PureSkill.gg, while independently running a long-standing rental platform he built and maintains. Evan brings research-grade problem solving and quantitative rigor to system design, reliability, and rapid iteration, informed by his doctoral training in physics. He’s an active creator on GitHub with project skeletons and system tooling under his accounts, reflecting a taste for reusable developer infrastructure and bootstrapping new projects. Colleagues know him for turning complex technical constraints into pragmatic, production-ready solutions and for blending hands-on coding with strategic product leadership.
15 years of coding experience
5 years of employment as a software developer
Doctor of Philosophy (Ph.D.), Physics, Doctor of Philosophy (Ph.D.), Physics at University of California, Riverside
Bachelor’s Degree, Physics, Bachelor’s Degree, Physics at University of California, Santa Barbara
Contributions:6 releases, 207 commits, 44 pushes in 2 years 3 months
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Evan Sosenko - Senior Software Engineer at OurTownRentals.com