Arthur Couteau

Software engineer with a strong web & operations focus. I like owning a product end to end — from the data model and the API to the frontend, CI/CD, deployment and keeping it running in production. Three years of production operations at Viaccess-Orca (Orange group), plus a portfolio of full-stack products I designed, built and deployed on my own.

Experience

• Multi-tenant SaaS that automatically generates and publishes social-media posts for amateur sports clubs on Instagram and Facebook.

• Shared HTML/CSS rendering engine (editor ↔ server, pixel parity via a Playwright worker) plus a "Canva-like" editor.

• Idempotent end-to-end publishing pipeline (render → S3 → Meta Graph API), Stripe billing and scheduled jobs.

• Supervised 15,000+ critical production services (OpenSearch, Kibana, Centreon); daily morning checks and status reports.

• Built and maintained two production PHP applications (one on Symfony) with GitLab CI/CD.

• Deployed a high-availability PostgreSQL cluster from scratch (ClusterControl, HAProxy, PgBackRest), approved through a Change Advisory Board.

• Wrote and maintained Perl, Bash and Python automation scripts; handled incidents via Jira within SLAs, lowering MTTR.

Projects

1. Baddle — the badminton Wordle — live demo · code
• Daily web game guessing the mystery player among 129 legends. Server-side anti-cheat, automated scraping pipeline (Zod validation), deterministic daily draw, full CI/CD, SEO/PWA.

2. Laga-agenda — conversational calendar assistant — code
• Telegram bot driving an Outlook calendar in natural language (text & voice) via an LLM + speech-to-text. Defense-in-depth against prompt injection, 4× smaller memory footprint, OAuth2 PKCE.

1. WhatsApp Poll Bot — recurring multi-group polls — code
• Reverse-engineered WhatsApp vote decryption (HMAC-SHA256). SQLite layer with N+1 elimination , CI/CD auto-opening/closing issues, atomic Postgres backup/restore.

2. hq — application monitoring micro-service — private code, available on request
• End-to-end incident pipeline (uptime → Telegram → enriched GitHub issue → auto-resolve). GitHub App with idempotent issue deduplication and automatic stacktrace enrichment.