Guillaume Marceau
Software Engineering Manager at Arch
New York, New York, United States
Summary
👤
Senior🎓
Top SchoolGuillaume Marceau is a seasoned engineering leader with 21 years of experience transforming engineering cultures and delivering large-scale, mission-critical systems across startups and enterprise settings. Currently managing Reporting & Exports at Arch, he previously led multi-disciplinary teams at Flatiron Health where he modernized massive data pipelines, doubled revenue with panoramic datasets, and delivered $100M/year in fixed-scope contracts on time. He has a strong systems foundation—from distributed consensus and real-time simulation to OLAP analytics and MPP technologies—and a track record of driving orders-of-magnitude performance and reliability improvements. An educator at heart, his research on programming pedagogy influenced code.org curricula, and his open-source documentation work for the notable Racket project shows a long-standing commitment to clarity and developer experience. Based in New York, he blends hands-on technical depth with pragmatic people and product leadership to align stakeholders and scale engineering sustainably.
21 years of coding experience
16 years of employment as a software developer
Master Computer Science Programming Languages, Master Computer Science Programming Languages at Brown UniversityPhD Studies (incomplete) Computer Science and Learning Sciences, PhD Studies (incomplete) Computer Science and Learning Sciences at Worcester Polytechnic InstituteBachelor's Degree Computer Science, Bachelor's Degree Computer Science at McGill University
Stackoverflow
396reputation
48kreached
7answers
4questions
Github Skills (11)
racket10
documentation10
technical-writing10
scheme6
ide6
ergonomics6
voice6
speech-recognition6
speech6
loops6
emacs6
Programming languages (6)
Github contributions (5)
racket/racket
Jan 2005 - Sep 2011
The Racket repository
Role in this project:
Technical Writer
Technical WriterContributions:68 commits, 1 comment in 6 years 9 months
Contributions summary:Guillaume's commits primarily focus on improving and expanding the documentation for the Racket project's teaching languages and libraries. Their contributions include updating error message guidelines, refining documentation structure, and correcting vocabulary usage within the documentation. The user has also updated the documentation to reflect the new vocabulary and structure of the teaching languages.
code-golfschemepolyglotlanguage-designprogramming-languages
gmarceau/ynab-viz
Feb 2016 - Sep 2020
Contributions:5 pushes, 1 branch in 4 years 7 months
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