Javier Villanueva
Simulation Network Lead - Consultant
Buenos Aires, Autonomous City of Buenos Aires, Argentina
Summary
🤩
Rockstar🎓
Top SchoolJavier Villanueva is a seasoned systems engineer and simulation network lead with 14 years of experience building resilient infrastructure and developer-focused tooling across Rust, Node.js, TypeScript, Python and Go. Based in Buenos Aires, he blends hands-on backend and test automation work—contributing to high-profile open-source projects like Polkadot—with SRE and cloud architecture expertise (AWS, Kubernetes, Terraform, Ansible). As an RHCE and longtime meetup co-organizer, he pairs deep Linux and networking knowledge with pragmatic automation, previously leading Node.js platforms and bespoke CI/CD and testing frameworks. Notably, his contributions to Polkadot emphasize simulation of malicious actors and Zombienet backchannel orchestration, reflecting a specialty in complex distributed-system testbeds and upgrade resilience.
14 years of coding experience
Ing. en sistemas, Sistemas, Ing. en sistemas, Sistemas at Universidad Abierta Interamericana
Spanish, English
Stackoverflow
1,384reputation
303kreached
12answers
1question
mongodb
top-5%
mongoose
top-5%
Github Skills (22)
substrate10
docker10
testing10
dockers10
cicd10
polkadot-js10
blockchain10
nodejs10
rust10
polkadot10
nodes10
mongoose9
mongodb9
parity8
aws-serverless6
Programming languages (11)
Github contributions (5)
paritytech/polkadot-sdk
Aug 2023 - Jun 2026
The Parity Polkadot Blockchain SDK
Role in this project:
Back-end Developer & Test Automation Engineer
Back-end Developer & Test Automation EngineerContributions:185 reviews, 120 PRs, 424 pushes in 2 years 10 months
Contributions summary:Javier's commits primarily focus on implementing and testing integration features within the Polkadot SDK, specifically targeting the "malus" and "zombienet" testing frameworks. They introduced new tests, adapted existing ones, and refactored code related to malicious actor behavior within the blockchain environment. The user's work includes modifications to support Zombienet backchannel, indicating they have experience with this test tool to run and test the project code.
blockchainpolkadotcumulussubstrate
paritytech/polkadot
Nov 2021 - Jan 2023
Polkadot Node Implementation
Role in this project:Backend Developer & Test Automation Engineer
Backend Developer & Test Automation EngineerContributions:82 reviews, 28 commits, 26 PRs in 1 year 2 months
Contributions summary:Javier's commits primarily revolve around implementing and testing features within the Polkadot node implementation, specifically related to malicious behavior simulations ("malus"). They introduce integration tests using "malus" actors and Zombienet, focusing on areas such as back garbage candidate and suggesting garbage candidates. Their contributions also encompass the addition of Zombienet backchannel functionality for test coordination. Furthermore, the user demonstrates skills in test enhancements, including adding upgrade tests and configuring CI/CD pipelines.
polkadotparityblockchainrustnode
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