# Predrag Gruevski

> Predrag Gruevski is an independent software engineer, open-source creator, and Rust ecosystem luminary best known for building Trustfall - a universal query engine that lets you query anything from APIs to LLMs - and cargo-semver-checks, a semantic versioning linter that's becoming a cornerstone of the Rust publish workflow. A former MIT competitive mathematician turned principal engineer at Kensho Technologies, Predrag brings Olympic-level rigor to API design and compiler technology, writing and speaking extensively on correctness-first software development.

- **Role:** Independent Software Engineer & Open-Source Creator
- **Organizations:** Trustfall, cargo-semver-checks, Kensho Technologies (former), MIT (alumnus)
- **Education:** B.S. in Computer Science and Engineering, Massachusetts Institute of Technology (MIT)
- **Known for:** Bronze medal at International Mathematics Olympiad (2009, 2011), Bronze medal at International Olympiad in Informatics (2010, 2011), First place at Balkan Mathematical Olympiad (2010, 2011)

## Career timeline

- **2009** — Bronze medal at International Mathematics Olympiad (IMO)
- **2010** — Bronze medal at International Olympiad in Informatics (IOI); First place at Balkan Mathematical Olympiad
- **2011** — Bronze medal at IMO and IOI; First place at Balkan Mathematical Olympiad
- **2011** — Enrolled at MIT for Computer Science and Engineering
- **2013** — Interned at Dropbox; won runner-up 'Beast Mode' Hack Week award for pool-shot coach using machine vision
- **2014** — Interned at Firebase (just before Google acquisition)
- **2015** — Graduated MIT; interned at Palantir Technologies; joined Kensho Technologies
- **2017** — Open-sourced pytest-annotate from Kensho
- **2018** — Led Graph Infrastructure team at Kensho; published GraphQL compiler as open source
- **2020** — Promoted to Principal Engineer, Architecture team at Kensho Technologies
- **2022** — Created and launched Trustfall universal query engine and cargo-semver-checks
- **2023** — Left Kensho; became independent; cargo-semver-checks adopted by tokio and key Rust crates
- **2024** — Spoke at RustConf 2024 (Montreal) and EuroRust 2024; Rust Foundation funding development of cargo-semver-checks; achieved 100-500x performance improvements
- **2025** — Continued independent work on Trustfall and cargo-semver-checks; appeared on Open Source Security Podcast

## Achievements

- Bronze medal at International Mathematics Olympiad (2009, 2011)
- Bronze medal at International Olympiad in Informatics (2010, 2011)
- First place at Balkan Mathematical Olympiad (2010, 2011)
- Created Trustfall - a universal query engine for querying any data source
- Created cargo-semver-checks - adopted by tokio and planned for integration into cargo itself
- Developed open-source GraphQL compiler at Kensho Technologies
- Discovered security vulnerabilities in 6 popular PC remote control apps with 2-7.5 million downloads (MIT research)
- Achieved 9-13x faster graph processing than prior state-of-the-art (MIT research)
- Listed as inventor on multiple Kensho Technologies patents
- Runner-up 'Beast Mode' award at Dropbox Hack Week for pool-shot coach system using machine vision
- Rust Foundation funding recipient for cargo-semver-checks
- Speaker at RustConf 2024, EuroRust 2024, FOSDEM 2024

## Latest updates

- **2025-04** — Appeared on Open Source Security Podcast discussing cargo-semver-checks
- **2024-09** — Spoke at RustConf 2024 in Montreal on ending accidental semver-breaking changes
- **2024-11** — Spoke at EuroRust 2024 on code testing beyond the basics
- **2024-03** — Spoke at FOSDEM 2024
- **2024-01** — Achieved 100-500x performance improvements in cargo-semver-checks on specific operations
- **2023-08** — Appeared on RustShip podcast #2 discussing Trustfall and cargo-semver-checks

## Links

- Website: https://predr.ag/
- LinkedIn: https://www.linkedin.com/in/predrag-gruevski-0abb36296/
- Twitter/X: https://x.com/PredragGruevski
- GitHub: https://github.com/obi1kenobi

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Profile page: https://yespress.io/predrag-gruevski
Published by YesPress — https://yespress.io
Last updated: 2026-04-21