Gautier Folco
Senior Software Architect & Technical Coach (Freelance) at Haskell Foundation
Lyon, Auvergne-Rhône-Alpes, France
Summary
🤩
Rockstar🎓
Top SchoolGautier Folco is a senior software architect and technical coach with 14 years of experience helping startups and FinTechs turn fragile codebases into resilient, business-aligned systems. He blends Functional Programming (Haskell), Domain-Driven Design and event-sourced architectures to deliver type-safe, composable systems that trade runtime surprises for compile-time guarantees. Hands-on across distributed systems, high-availability backends and security-critical products, he has driven measurable outcomes—automating workflows that recovered 100+ hours/week and redesigning FinTech architectures to meet compliance and asset-security needs. An active open-source contributor, he improved middleware and health-check capabilities in the Haskell WAI ecosystem and has history working on large projects like Apache James. He also trains engineering teams in Functional Domain Design and has repeatedly cut deployment times and failure-detection delays through observability and CI/CD improvements. Based in Lyon, he combines deep technical craft with pragmatic coaching to keep software maintainable beyond the usual two-year decay.
14 years of coding experience
11 years of employment as a software developer
Master 2 Recherche en Réseaux, Télécoms et Services (one-year degree before post-graduate studies), Informatique, Master 2 Recherche en Réseaux, Télécoms et Services (one-year degree before post-graduate studies), Informatique at Université Claude Bernard Lyon 1Ingénieur en Informatique (master of science in engineering), Computer Science, Ingénieur en Informatique (master of science in engineering), Computer Science at INSA Lyon - Institut National des Sciences Appliquées de LyonBTS (2 years technical degree), Informatique de Gestion option développeur d'Applications (Computer Science / Software Development), BTS (2 years technical degree), Informatique de Gestion option développeur d'Applications (Computer Science / Software Development) at Institution des ChartreuxSOC Analyst, Cyber-opérations et guerre électronique, SOC Analyst, Cyber-opérations et guerre électronique at University of Paris I: Panthéon-Sorbonne
French, English, Italian, Icelandic
Github Skills (12)
javas10
middleware10
web-development10
web-application10
webapp10
back-end-development10
haskell10
java10
rest-api9
json9
data-serialization8
serialization8
Programming languages (26)
Github contributions (5)
apache/james-project
Jun 2018 - Jul 2020
Emails at the heart of your business logic!
Role in this project:
Back-end Developer
Back-end DeveloperContributions:326 commits, 4 PRs, 13 comments in 2 years 2 months
Contributions summary:Gautier's commits primarily focused on back-end development tasks, addressing issues within the web admin and core functionalities. This included improvements to the web admin interface, and implementing features, such as handling and displaying details related to emails and mailboxes. The commits also involved making changes in areas such as data persistence, and serialization in Java and also improvements to the underlying components of the system
mailsmtpemailbusiness-logicemails
yesodweb/wai
Apr 2022 - Apr 2022
Haskell Web Application Interface
Role in this project:Back-end Developer
Back-end DeveloperContributions:2 reviews, 5 commits, 3 PRs in 2 days
Contributions summary:Gautier contributed to the `wai` repository by implementing new middleware components. Their work included adding a health check endpoint for application monitoring and a middleware selection feature to conditionally apply middleware. Furthermore, the user made several iterations on the middleware selection implementation, refining its functionality. These changes extended the library's capabilities and provided more flexible control over request processing.
webframeworkhaskellweb-applicationwebapp
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