Peter Greczner
Co-Founder at Affinity
New York, New York, United States
Summary
👤
Senior🎓
Top SchoolPeter Greczner is a seasoned engineering leader and serial founder with 11 years of experience building and scaling resilient, regulated production systems across fintech, ad-tech, and sports/web3 startups. As an early engineering leader at Bread, he helped grow the team from seed to a ~$500M acquisition while owning platform architecture, CI/CD, and high-throughput payment and decisioning services. He combines hands-on polyglot development (Go, Java, Ruby, JS) with deep operational and compliance expertise (SOC1/2, bank audits) and a track record of shipping fault-tolerant distributed systems. More recently he’s co-founded multiple startups—including a blockchain-enabled sports tech product—and continues to iterate on niche consumer projects from Raspberry Pi hacks to media-captured gaming sites. Known for mentoring engineering teams and building for longevity, he blends product-minded engineering with practical security and scalability disciplines.
11 years of coding experience
7 years of employment as a software developer
Masters Electrical and Computer Engineering, Masters Electrical and Computer Engineering at Cornell University
Github Skills (89)
javascript9
sendgrid9
database9
stripe-api9
postgresql9
query-builder9
mysql9
sqlite9
nodejs9
sql-server9
mongodb9
orm-library8
api8
solidity8
sql-query8
Programming languages (7)
Github contributions (5)
getbread/ginkgo
Mar 2016 - Jan 2018
Contributions:2 PRs, 2 pushes, 1 branch in 1 year 9 months
golangbdd-testingtesting-frameworktestingbdd
web3-byoa/react-byoa-sdk
Feb 2022 - Aug 2022
Contributions:9 commits, 6 PRs, 5 pushes in 6 months
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