Joe Holdcroft
Member Of Technical Staff (Team Lead) at Tessl
Brighton, England, United Kingdom
Summary
🤩
RockstarJoe Holdcroft is a founding engineering manager and seasoned software leader with 12 years of experience building high-performing teams and scalable service-oriented products from early-stage startups to enterprise scale. Comfortable in both stand-ups and board meetings, he blends servant leadership and hands-on technical context to hire, mentor and grow engineers while shaping product and technology strategy. At Snyk he integrated and expanded teams post-acquisition, helping deliver a capability that supported major enterprise deals, and his open-source contributions include strengthening testing for the widely used Snyk CLI. As a fractional CTO and mentor he’s guided startups to adopt product thinking, restructure around value streams, and launch MVPs to find product-market fit. Based in Brighton, he balances strategic leadership with a tinkerer’s curiosity—still coding and instrumenting systems to ask the right questions and improve outcomes.
12 years of coding experience
16 years of employment as a software developer
Stackoverflow
1reputation
0reached
0answers
0questions
Github Skills (9)
snyk10
javascript10
testing10
cli9
nodejs8
vulnerabilities8
security8
dockers7
docker7
Programming languages (8)
Github contributions (5)
snyk/cli
Jul 2019 - May 2020
Snyk CLI scans and monitors your projects for security vulnerabilities.
Role in this project:
Full-stack Developer
Full-stack DeveloperContributions:12 commits, 9 PRs, 21 pushes in 9 months
Contributions summary:Joe primarily contributed to the Snyk CLI's testing infrastructure, adding new test cases and modifying existing ones to cover various scenarios and features. They enhanced the test suite, specifically focusing on verifying the functionality of the `test` command and its different options. Their work included implementing tests for Docker, project name overrides, file-based testing, and ensuring correct API calls. They also fixed an issue related to the target file being sent in the API request.
clisecuritysnykvulnerabilitiesmonitor
JoelBalmer/sleep-diary
Sep 2019 - Feb 2026
Track yo sleep. Now!
Contributions:66 PRs, 105 pushes, 102 branches in 6 years 5 months
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