Emotion Aura
Reads your facial expression and hand gestures from the webcam and turns them into a cloud of particles around your face. Everything runs in the browser.
runs entirely in the browser
Hi, I'm
Jimmy.
I build things that
ship.
Backend & Data Engineer in Nantes. Python APIs and data pipelines by day. By night, 17 side projects and a notebook full of the next ones.
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Things I made
Pinned in no particular order. Hover to unpin.
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17 of 17 pinned
Hub
My private control room. It sorts mail from three inboxes with Jev, watches 48 scheduled jobs, 26 sites and two servers, and puts everything that needs me in one feed that pings my phone.
Barathon
Rate bars with your friends, straight from the bar. Everyone scores the place, the beer and the night on their phone, and each bar lands on a shared map with its grade.
Schedule Blocker
iOS app that closes distracting apps on a schedule or when the daily quota runs out, and iOS itself enforces the block. Fifteen more minutes cost sixteen seconds of guided breathing.
sixteen seconds of breathing to unlock
MediaJanitor
Finds what to delete on a Jellyfin server shared with friends: old files, huge files, things nobody watched. Works with Sonarr, Radarr and Jellyseerr.
350 commits, mostly while I slept
Rave Tycoon
Tycoon game set in the French free-party scene. Run a sound system, book the DJs, hold the party until sunrise, and hear every decision in music the simulation synthesizes live.
every sound synthesized live
Distorsion Movement
Generative art in Python. A grid of shapes, bent in real time by 20 distortion functions, with 48,000+ possible combinations.
Music Bingo
Music blind test for a room full of people. The presenter plays the tracks, and everyone ticks bands off their own grid on their phone.
the paper grids kept running out
Live Buzzer
Party buzzer for phones where the fastest thumb wins, not the fastest connection. NTP-style clock sync puts 4G and wifi players on equal terms.
Chifoumi
Rock-paper-scissors at a distance, to settle everyday debates. Send a duel link, you both pick on your phones, and the two choices show up at the same time. No accounts, nothing stored.
loser does the dishes
MonPetitProno Stats
Stats dashboard for a Mon Petit Prono league between friends, with rankings, prediction accuracy, player badges and head-to-heads pulled from the MPP API.
City Battle
Pick two of 35,000+ French cities and compare them on open data: population, area, density, altitude, bars, restaurants and more.
Shopify Scraper
Exports a Shopify store's products into a file WooCommerce can import. A web app plus a Chrome extension.
100+ users, my first real SaaS
Binance Grid Bot
Grid trading bot for Binance Spot. It trades BTC, ETH and SOL against USDC, reinvests its profits and takes orders from Slack.
Take A Beer
Landing page for a friend's business, renting beer taps and selling kegs for events.
Apple Health Tracker
Sends my Apple Health data to a small server every hour, and posts charts of it in Slack every day.
PingMaster
Watches your APIs, landing pages and servers, keeps their uptime and response times, and posts in Slack when something goes down.
an excuse to try Astroa bit about me ↓
I write Python for a living, mostly APIs and the data pipelines behind them, on AWS and Snowflake. When a tool annoys me, I rebuild it.
That's how a 4,000-line script turned into MediaJanitor, and how my doomscrolling turned into an iOS app. The best way to learn is to ship.
- ship side project #16
- learn Swift for real
- redesign this website
- write the next blog post
- ship side project #17
What's in the toolbox
The stuff I reach for at work, and again at 11pm.
Languages & Frameworks
- Python
- FastAPI
- Django
- Pydantic
- Celery
- SQLAlchemy
- pytest
Data
- SQL
- PostgreSQL
- Snowflake
- dbt
- dbt Cloud
AWS Services
- S3
- EC2
- Lambda
- API Gateway
- Step Functions
- Kinesis
- Aurora
- RDS
- Cognito
- CloudWatch
- WAF
DevOps
- Docker
- Pulumi
- CI/CD
- GitLab CI/CD
- GitHub Actions
From the notebook
Notes on how things got built.
How I use Ralph to build a full SaaS with Claude Code
MediaJanitor took 350 commits and 150 user stories, for 10 to 15 hours of my own time. Claude Code wrote most of it overnight, in a loop called Ralph. This is how I set it up.
read the post350
commits, mostly autonomous