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Achievements

Achievement: Pull Sharkx2Achievement: Pair ExtraordinaireAchievement: StarstruckAchievement: Arctic Code Vault Contributor

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nseaSeb/README.md

Hi, I'm Sébastien 👋

API Integration Developer & Elixir/Phoenix Developer — building production SaaS with Ash Framework, LiveView, and PostgreSQL.

I spent 3 years on the other side of the API — debugging integrations, resolving 3000+ support tickets at Sellsy. That taught me exactly where systems break under real usage. Now I build them: contributing to the Elixir core language and the Ash ecosystem, and shipping a multi-tenant SaaS platform from scratch.

🟢 Open to work — Elixir developer & API integration support roles, remote friendly. Full CV

🔧 What I Do

  • Backend: Elixir, Phoenix, Phoenix LiveView, Ash Framework
  • Data: PostgreSQL, multi-tenancy (Triplex), full-text search (tsvector/ts_rank)
  • Infra: Fly.io, Docker
  • Other: Rust (Rustler NIFs), API integration, OAuth/Webhooks

🌱 Open Source

Merged contributions to core Elixir ecosystem projects:

  • elixir — merged by José Valim
  • ash (Ash Framework) — merged by Zach Daniel
  • postgrex — clarified Duration/interval decoding in docs
  • cfonb (Ruby, Pennylane) — fixed a silent line-dropping bug in the bank statement parser

Published on Hex

  • green_ash — keyboard-driven, AS/400-style LiveView console generated from Ash resource introspection. mix igniter.install green_ash
  • search_ash — multilingual full-text search for Ash, using pre-stemmed tsvectors (~30 languages)
  • stemmers — Rust/Rustler NIF powering search_ash's stemming
  • cfonb — Elixir library for parsing French CFONB bank statement files

🔭 Current Project

Verde/Gestiup

Multi-tenant SaaS for gardeners — from plots to customers. CTIFL labels, stock & point-of-sale transfers, invoicing, customer portal, and more.

Built solo with Elixir, Phoenix LiveView, Ash Framework, PostgreSQL, deployed on Fly.io.

💼 Background

Sellsy — API Technical Support (2023–present) / Software Developer (2022–2023)

  • 3000+ support tickets/year on API integrations, 98% satisfaction
  • Reverse-engineered and documented undocumented API models
  • Reduced recurring support issues 20% through improved documentation

🎓 Continuous Learning

275+ hours of technical training (Dyma Academy) · 8 certifications (Git, Python, Linux, Docker) · Mentored 80+ developers · StackOverflow contributor

📫 Reach Me

Pinned Loading

  1. ElixirPhoenixRessources ElixirPhoenixRessources Public

    Partage de ressources si possible en Français, une sorte d'awesome Elixir

    1 1

  2. tuSellsyApiV2 tuSellsyApiV2 Public

    Tests Unitaires API via Elixir

    Elixir 2

  3. wh_sellsy wh_sellsy Public

    Microservice node.js de reception rapide de webhook (fastify/redis/docker)

    JavaScript 4

  4. cfonb-elixir cfonb-elixir Public

    CFONB bank file parser for Elixir (French banking standard, 120-char account statements)

    Elixir 2