Henry Blanchette - PHD Student at University of Maryland

Henry Blanchette

PHD Student at University of Maryland

College Park, Maryland, United States

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Summary

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Henry Blanchette is a PhD student in computer science and an experienced software engineer with 11 years of hands-on work in Haskell, TypeScript, and Python, focused on programming languages, formal verification, and data-driven modeling. He has contributed to high-profile formal projects—such as Cryptol at Galois and the K semantics for the Ethereum VM—bringing deep expertise in type checking, evaluation, and K-framework proofs. His research and industry work span simulation, program analysis and verification, cryptography and ZKPs, and language design, with practical experience integrating cryptographic libraries and building verifiable-credentials platforms. Henry also develops experimental languages and solvers (e.g., a termination-checking language DCS and a Prolog-style Chronolog) and pairs formal methods with applied modeling in Coq and interaction trees. Based in College Park, MD, he combines academic rigor with product-minded engineering and a side pursuit of game development and design that informs his interest in game theory and simulation.

11 years of coding experience

1 year of employment as a software developer

Doctor of Philosophy - PhD Computer Science, Doctor of Philosophy - PhD Computer Science at University of Maryland

Bachelor’s Degree Mathematics and Computer Science, Bachelor’s Degree Mathematics and Computer Science at Reed College

High School, High School at Northgate High School

English, Spanish

Stackoverflow

Stats

71reputation

700reached

0answers

5questions

Github Skills (22)

crypto10

type-check10

evm10

virtual-machine10

formal-verification10

parsing10

error-handling10

type-checking10

text-parsing10

architecture9

architectures9

formal-methods8

bytecode7

code-analysis7

cabal6

Programming languages (18)

JavaC++RustPureScriptCoqMakefileTeXHTML

Github contributions (5)

GaloisInc/cryptol

May 2022 - Sep 2022

Cryptol: The Language of Cryptography

Role in this project:

Back-end Developer

Contributions:18 reviews, 214 commits, 14 PRs in 3 months

Contributions summary:Henry primarily contributed to the core functionality of the Cryptol language, focusing on type checking and evaluation. Their commits introduced a new exception, `InstantiationsNotFound`, to improve error handling during evaluation. Further development includes implementing features such as constraint guards in the type checking process, as well as making improvements to the parser and supporting code for new features.

cryptographyfhecrypto

runtimeverification/evm-semantics

Jun 2021 - Aug 2021

K Semantics of the Ethereum Virtual Machine (EVM)

Role in this project:

Back-end Developer / Software Architect

Contributions:33 reviews, 116 commits, 13 PRs in 2 months

Contributions summary:Henry primarily focused on enhancing the K Semantics of the Ethereum Virtual Machine (EVM). Their contributions involve generalizing and refactoring lemmas within the `tests/specs` directory, particularly in `lemmas.k`, to improve the efficiency and correctness of the EVM's formal specification. This includes modifying buffer reasoning, map reasoning and arithmetic, indicating a deep understanding of the K framework and the EVM's operational semantics. They also addressed test failures, adjusted lemmas, and incorporated new functional specifications.

ethereumblockchainevmvirtual-machineethereum-virtual-machine

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