Sebastian Ortiz
AI Product Engineer at Casper Studios
San Juan, Philippines
Summary
🤩
Rockstar🎓
Top SchoolSebastian Ortiz is an AI Product Engineer and systems-focused back-end developer based in San Juan, Philippines, with eight years of professional experience and a decade-long background in full-stack web development. He blends production-ready engineering—improving dev ergonomics, CI speed, and preview deployments—with hands-on contributions to high-profile open-source Rust projects like rust-analyzer and tokio-postgres. At Verdn (YC, B Corp) he helped scale a pledge-tracking platform to millions of daily requests and led major productivity wins such as cutting dev server startup from minutes to seconds and migrating to a monorepo with remote caching. He mentors and teaches widely, having designed curricula and popularized Svelte in academic and non-profit settings while directing engineering programs. His open-source work shows a pattern of careful refactoring, type-safety improvements, and performance-minded changes across languages and libraries. Curious and pragmatic, he pairs developer experience advocacy with a knack for simplifying complex systems into maintainable, well-tested code.
8 years of coding experience
2 years of employment as a software developer
Bachelor of Science - BS, Computer Science, Summa Cum Laude, Bachelor of Science - BS, Computer Science, Summa Cum Laude at University of the Philippines Diliman
Github Skills (29)
javascript10
modular10
postgresql10
futures10
validations10
modularity10
typescript10
feature-flags10
type-alias10
validation10
typescript-types10
typescripts10
rust10
refactoring10
schema10
Programming languages (13)
Github contributions (5)
fabian-hiller/valibot
Jul 2023 - Oct 2024
The modular and type safe schema library for validating structural data 🤖
Role in this project:
Back-end Developer
Back-end DeveloperContributions:4 reviews, 3 PRs, 12 comments in 1 year 3 months
Contributions summary:Sebastian primarily focused on refactoring and optimizing the codebase related to record validation within the valibot library. They made changes to the `recordAsync.ts`, `record.ts`, and `values.ts` files, indicating a focus on the core logic of data validation. Their contributions involved refactoring the internal data structures and control flow by leveraging features like `for...of` loops and optimizing performance. The user also addressed security concerns by adding code to exclude blocked keys.
bundle-sizemodularparsingruntimetype-safe
console-rs/dialoguer
Sep 2021 - Oct 2021
Rust utility library for nice command line prompts and similar things
Role in this project:Back-end Developer
Back-end DeveloperContributions:10 commits, 3 PRs, 3 comments in 1 month
Contributions summary:Sebastian primarily refactored the `dialoguer` library, focusing on modularization and feature flags. They treated the `password` module as an optional feature and addressed Clippy warnings, enhancing code quality. The user also formatted the code using `cargo fmt`. They also worked to loosen trait bounds for the `Validator` and `History` traits, improving code flexibility and maintainability.
promptssimilarsubcommandsrustcommand-line-parser
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