João Oliveirinha
Lisbon, Lisbon, Portugal
Summary
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RockstarJoão Cruz is a software engineer based in Lisbon with 10 years of experience, currently building products at Coverflex. He has held engineering roles at OLX and a security operations internship at Cloudflare, giving him a practical blend of backend development and security-focused operational experience. As an open-source contributor to Cloudflare's well-known cloudflared tunnel client, he implemented QUIC transport enhancements, an origin UDP abstraction, TLS min/max controls, and fixes for HTTP/2 and SSE—work that improved protocol support, stability, and security. He holds a Bachelor's from Universidade de Coimbra and is pursuing a Master's at Instituto Superior Técnico. João favors reducing dependencies and introducing pragmatic abstractions to make complex network protocols easier to support in production.
10 years of coding experience
Github Skills (8)
go10
http210
quic10
reverse-proxy9
tls139
libtls9
tls129
mtls9
Programming languages (4)
Github contributions (5)
cloudflare/cloudflared
Nov 2021 - Jan 2023
Cloudflare Tunnel client (formerly Argo Tunnel)
Role in this project:
Back-end Developer
Back-end DeveloperContributions:18 reviews, 62 commits, 28 PRs in 1 year 1 month
Contributions summary:João's commits primarily focused on enhancing the Cloudflare Tunnel client's functionality, particularly around its QUIC transport. They implemented an abstraction for origin UDP connections, which improves support for complex protocols and removed dependencies. Further contributions include support for TLS min/max version specifications and adjustments to fix HTTP/2 transport bugs and SSE streaming. These changes improved stability, security, and data handling for the tunnel client.
argo-tunnelproxycloudflarecloudflare-tunnelzero-trust-network-access
joliveirinha/joliveirinha.github.io
Jul 2019 - Jul 2019
Contributions:15 pushes, 2 branches in 1 day
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