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I am Gautier DI FOLCO working as Staff Software Engineer / Senior Haskell developer @ Autogriff. I am a professional Software Engineer, I have a solid track record of working with business owners to understand project requirements whist working to improve overall functionality of existing systems. With repeated success working from remote locations, I am a skilled collaborator and trusted leader.

• 🔭 I’m currently working as Staff Software Engineer / Senior Haskell developer @ Autogriff.
• 🌱 I’m currently learning nix, Observability, Product management, Rust
• 👯 I’m looking to collaborate on Haskell open source projects
• 💬 Ask me about Haskell, Backend development, Architecture
• 📫 How to reach me: gautier [dot] difolco [at] gmail [dot] com, ,
• 🔗 Other links: Personal website / Passeport
• ⚡ Fun fact: unbeatable pasta eater

• Haskell (Servant, Polysemy), Nix(OS)
• Github Actions
• Terraform
• EventStore
• PostGreSQL
• AWS

I have published some packages over Hackage (Haskell):

• pure-sum (March 2024): provides a way to properly derive sum types instances (also -aeson)
• kill-bool (March 2023): Booleans strong-typing
• poolboy (March 2023): Simple work queue for bounded concurrency
• adhoc-fixtures (November 2022): Simplify tests fixtures (also -hspec)
• yarl (September 2022): simple extensible records library (with getField support)
• sized-wrapper (August 2022): provides a wrapper for sized values (also -aeson, -quickcheck, -text)
• librarian (July 2022): a rules-based files moving cli tool
• nonempty-wrapper (June 2022): provides a wrapper for non-empty values (also -aeson, -quickcheck, -text)
• pulsar-hs (September 2021): complete Apache Pulsar client and admin client
• aeson-modern-tojson (June 2021): aims to give a post 0.x way to derive aeson's ToJSON instances
• typed-time (May 2021): provides a type-level time format
• amqp-streamly (August 2020): Connect amqp (RabbitMQ) to streamly
• servant-streamly (July 2020) Streamly support for Servant
• dijkstra-simple (June 2020): a simple Dijkstra's shortest-path implementation

I have also published:

• grafana-dashboards.nix (nix) (September 2023): Nix tool used to fetch and transform Grafana Dashboards
• docker-soju (Docker) (August 2022): Dockerized version of soju (an IRC bouncer)
• coc-hls (npm) (December 2021): haskell-language-server coc.nvim extension
• danger-ormolu (RubyGems) (August 2021): ormulu integration in Danger (CI tool)

I also contributed to the following projects:

• one-time-password: Haskell iimplementation of one-time-password (HOTOP/TOTP)
  • December 2023: add nix (flake) support
  • December 2023: add a full CLI
  • April 2024: add nix (flake) support
• libsodium-bindings: Haskell bindings to libsodium (cryptographic library)
  • December 2023: fix flake (nix) derivation for reuse
  • April 2024: add nix (flake) support
• toml-parser: Haskell Toml parser
  • November 2023: Add GHC 9.8.1 support
• essence-of-live-coding: Universal Live Coding & Functional Reactive Programming Framework
  • October 2023: Add Selective instance to Cell
• hapistrano: Deploy tool for Haskell applications, like Capistrano for Rails
  • October 2023: Add interactive init command
• rhine: Haskell Functional Reactive Programming framework with type-level clocks
  • October 2023: Add support for dunai 0.11
• monocle: Changes-sets organisation and monitoring tool
  • October 2023: Add Workspace name validation
• ergo: A modern IRC server (daemon/ircd) written in Go
  • October 2023: introduce Prometheus
• OpenSearch documentation: OpenSearch (ElasticSearch fork) documentation
  • October 2023: drop point in time in 1.3.x
• skip-duplicate-actions: Github Action to skip jobs on arbitrary conditions
  • September 2023: Upgrade to NodeJS 20
• lyontechhub.github.io: LyonTechHub (Community of tech communities of Lyon)
  • August 2023: Migrate from Angular to static site generation
• dhall-openssl: dhall types and utils to generate OpenSSL/LibreSSL configuration files
  • August 2023: Add CRL support
• microlens-aeson: microlens for aeson
  • August 2023: Add aeson 2.2.0.0 support
• nixpkgs: nix-based packages set
  • June 2023: upgrade curlie to 1.7.1
  • July 2023: add meta.mainProgram to eventstore
  • December 2023: add desktop icon to appflowy
• curlie: curl Rust wrapper (like httpie)
  • May 2023: Fix curl long flags with value
• purebred-email: Haskell MIME e-mails parsing and manipulation library
  • March 2023: Fix documentation
• tmux-net-speed: tmux status bar net speed fragment
  • March 2023: Fix bash invocation
• cardano-documentation: Cardano blockchain documentation
  • March 2023: Fix a typo
• pg-entity: A pleasant PostgreSQL database layer for Haskell
  • October 2022: Fix resource-pool >= 0.3 compilation
• cachix-action: Build software only once and put it in a global cache
  • October 2022: Add flake support
• flora-server: A package index for the Haskell ecosystem
  • October 2022: Restore nix flake
  • October 2022: Add nix flake CI
  • October 2022: Improve bulk performances
  • March 2023: Improve bulk performances
• get-wasp: wasp installer
  • October 2022: Rework update usecase
• aeson: A fast JSON library
  • October 2022: Add @since in documentation
• hackage-server: Hackage-Server: A Haskell Package Repository
  • October 2022: Add lastVersion in listings
  • February 2023: Fix lastVersion update in listings
  • December 2023: Replace lastVersion by referenceVersion (ignore deprecated versions)
  • February 2024: Add vulnerability reporting link
• cabal: Official upstream development repository for Cabal and cabal-install
  • October 2022: Add generate PackageInfos
• hie-bios: Set up a GHC API session for various Haskell Projects
  • October 2022: Add logs over commands
• wasp: A programming language that understands what a web app is.
  • October 2022: Add cli update command
• password: datatypes and functions for easily working with passwords in Haskell
  • October 2022: Add utilities functions
  • October 2023: Introduce CLI
• nix-output-monitor: Pipe your nix-build output through the nix-output-monitor a.k.a nom to get additional information while building.
  • October 2022: Drop flow-file operators
  • October 2023: replace Map with HashMap
• conferer: Configuration management for Haskell
  • October 2022: Fix missing projects CI
• hemmet: Emmet-like text expansion tool capable to produce HTML, CSS, file trees, that stuff
  • October 2022: Add hlint & CI Github Action
• tomland: Bidirectional TOML serialization
  • October 2022: Add hlint Github Action
  • October 2022: Add Codec Selective instance
• iris: Haskell CLI Framework supporting Command Line Interface Guidelines
  • October 2022: Add hlint Github Action
• eclair-lang: A minimal, fast Datalog implementation in Haskell that compiles to LLVM
  • October 2022: Add hlint Github Action
• spaceship-vi-mode: vi-mode plugin for spaceship (a Zsh customisable prompt)
  • September 2022: Fix antigen deploy instructions
• zinza: Jinja style templating library for Haskell
  • September 2022: Add DerivingVia Generics newtypes
• event-streaming-patterns: Confluent/Kafka Messaging/Streaming patterns
  • August 2022: Fix code example
• hspec: hspec is a behavior-driven development testing library (à la RSpec)
  • August 2022: Add parallel result rendering
• cabal: Haskell main build tool
  • July 2022: Clarify cli flag documentation
• mercure: Server-Sent Event hub
  • July 2022: Add Caddy directive for Docker deployment
• hspec-discover: hspecs driver for tests discovery
  • June 2022: Add parallel runner
• optparse-generic: optparse-application Generics based library
  • April 2022: Add Parser/Record runner
• wai-extra: WAI utilities
  • April 2022: Add Middlewares for health checks
  • April 2022: Add a dynamic Middleware builder
  • March 2024: Add NoCache to MaxAge in wai-app-static
• vim-slime: ViM plugin for interactions with terminal multiplexers
  • December 2021: Fix tmux support
• powerline-go: Powerline-like shell prompts customization
  • December 2021: Add vi-mode segment
• tmux-mem-cpu-load: tmux monitor (CPU, RAM, load) utils (for the status line)
  • December 2021: Change RAM units threshold and CPU usage color
• Apache Pulsar: distributed pub-sub messaging system
  • November 2021: Headers fixes and synchronous functions addition in the C client
• generic-random: derive via GHC.Generics QuickCheck's Arbitrary instance
  • July 2021: Implement a type-level deriving via module
• bloodhound: ElasticSearch client
  • Since April 2022: Maintainer
  • February 2021: bug fixes
• pandoc: text format processing
  • January 2021: Support for Github wikilinks
• testcontainers-hs: manage Docker containers for tests
  • June 2022: Add naming strategies
  • May 2021: bug fixes
  • June-August 2020: Hspec support, bug fixes, aeson-optics usage
• hatrace: strace-like
  • June 2020: Introduction of many syscalls