André Cruz
Principal Systems Engineer at Cloudflare
Lisbon, Lisbon, Portugal
Summary
🤩
Rockstar🎓
Top SchoolAndré Cruz is a Principal Systems Engineer based in Lisbon with 18 years of experience designing and operating large-scale, secure distributed systems across cloud platforms like GCP, AWS and Azure. He combines deep systems and security expertise (MSc in Information Security, ISO 27001 lead auditor) with hands-on polyglot development in Python, Rust, Go, Elixir and others to deliver resilient architectures and CI/CD-driven delivery. At Cloudflare he progressed from SRE to principal, contributing to core runtimes and developer tooling (notably enhancements to Cloudflare Workers and Wrangler) and to widely used open-source projects such as nfcpy and pycassa. He has a track record of optimizing low-level concurrency and protocol logic (e.g., NFC NPP, connection pooling) and bringing cryptography-aware secure programming practices into production. Known for bridging research-level security knowledge with production reliability, he thrives on refactoring tricky core logic to improve performance and maintainability.
18 years of coding experience
21 years of employment as a software developer
Ruby/Rails, Ruby/Rails at WeBreakStuff - http://webreakstuff.comComputer Networks, Computer Networks at Information Science centre of the Instituto Superior TécnicoCertificate of Proficiency in English English, Certificate of Proficiency in English English at University of CambridgeEcole polytechnique fédérale de LausanneLead Auditor ISMS Lead Auditor Course, Lead Auditor ISMS Lead Auditor Course at BSI Management Systems Training - http://www.bsi-training.comErlang programming (basics OTP behaviors Mnesia) ejabberd programming., Erlang programming (basics OTP behaviors Mnesia) ejabberd programming. at Process One – http://www.process-one.netMsC Information Security, MsC Information Security at Carnegie Mellon UniversityBS Computer Science Engineering, BS Computer Science Engineering at Instituto Superior TécnicoMestrado Segurança da Informação, Mestrado Segurança da Informação at University of LisbonComplete Project Management, Complete Project Management at PMO Consulting - (Threon Iberia) - http://www.threon.comSun Certified Programmer for the Java 2 Platform Standard Edition 5.0, Sun Certified Programmer for the Java 2 Platform Standard Edition 5.0 at RumosSecure Programming for the web, Secure Programming for the web at Sysvalue - http://www.sysvalue.com
Stackoverflow
500reputation
48kreached
10answers
11questions
Github Skills (45)
mail-parser10
email-parser10
email-parsing10
javascript10
tls1210
python10
cassandra10
nfc10
cloudflare-workers10
smtps10
smtp10
tls1310
rust-wasm10
refactor10
e-mail10
Programming languages (33)
Github contributions (5)
cloudflare/workerd
Nov 2022 - Jan 2023
The JavaScript / Wasm runtime that powers Cloudflare Workers
Role in this project:
Back-end Developer
Back-end DeveloperContributions:61 reviews, 17 commits, 71 PRs in 2 months
Contributions summary:André primarily contributed to the workerd JavaScript/Wasm runtime by adding features related to byte streams and email processing. They implemented changes to the IO context to support bytestreams, and ensured worker implementations had access to byteStreamFactory, particularly for sendRpc subrequests involving bytestreams. Furthermore, the user introduced email-related event info and corrected timestamp handling for custom events.
cloudflarejavascriptpowersruntimeservice-worker
cloudflare/workers-sdk
Jan 2023 - Jan 2023
⛅️ Home to Wrangler, the CLI for Cloudflare Workers®
Role in this project:Full-stack Developer
Full-stack DeveloperContributions:45 reviews, 1 commit, 7 PRs in 1 day
Contributions summary:André primarily focused on enhancing the functionality of the `cloudflare/workers-sdk` repository, specifically around the Wrangler CLI. They added support for email events, enabling improved logging capabilities by integrating email event types into the tailing logs. Furthermore, the user implemented features for cloudflare-specific Javascript modules and send email bindings. These commits improved the flexibility of the Wrangler CLI and enhanced the overall developer experience by adding support for new features.
cloudflarejavascriptserverlessworkerstypescript
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