Sebastian Montero
Technical Lead at Hashed
Mexico City
Summary
👤
Senior🎓
Top SchoolSebastian Montero is a technical lead and computer systems engineer with over 14 years building production software and a decade of focused hands-on experience across web, backend, and blockchain stacks. For the past three years he has led teams at Hashed designing infrastructure, front-ends, back-ends and smart contracts for EOSIO and Substrate-based projects, lowering barriers to entry for complex blockchain use cases. He has a strong history of end-to-end ownership—from founding a decision-support web product for car dealers to architecting workflow engines for national utilities—which gives him deep expertise in system design, ETL, and developer tooling. An active contributor to polkadot-js/apps, he’s improved network endpoint and parachain integrations that enhance multi-chain interoperability for Polkadot/Substrate UIs. Fluent in Java, web technologies, and modern blockchain frameworks, he combines practical engineering with continual learning (machine learning coursework and Polkadot Blockchain Academy) to spot opportunities for product and protocol-level improvement.
10 years of coding experience
14 years of employment as a software developer
Polkadot Blockchain AcademyB.S. Computer Systems Engineering, Object Oriented Software Design and Development, Web Application Development, Database Design, B.S. Computer Systems Engineering, Object Oriented Software Design and Development, Web Application Development, Database Design at ITESMIntensive Machine Learning Course, Machine Learning, Intensive Machine Learning Course, Machine Learning at Ritsumeikan University
English, Spanish
Github Skills (7)
network-configuration10
substrate10
polkadot-js10
polkadot10
blockchain10
javascript8
ui-design5
Programming languages (12)
Github contributions (5)
polkadot-js/apps
Jun 2023 - Apr 2024
Basic Polkadot/Substrate UI for interacting with a Polkadot and Substrate node. This is the main user-facing application, allowing access to all features available on Substrate chains.
Role in this project:
Back-end Developer
Back-end DeveloperContributions:4 PRs in 9 months
Contributions summary:Sebastian focused on updating network endpoints within the `polkadot-js/apps` repository, specifically concerning the Hashed Network and MD5 network parachains. The user's work involved modifying configuration files to reflect updated URLs and parameters for the collator nodes. These changes included updates to the providers and network identifiers within the testing and production environments. The user consistently made multiple, focused updates that improved the applications ability to interact with different polkadot parachain environments.
substrateblockchainwalletchainssubstrate-node
digital-scarcity/eos-go-test
Aug 2021 - Jun 2024
Commonly used testing utilities for EOSIO smart contracts in Go
Contributions:1 PR, 6 pushes, 1 branch in 2 years 9 months
golangcommonlytestingeosiosmart-contracts
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