Hi, I'm Jimmy.
I build things that ship.

Backend, data and AI engineer in Nantes. Python APIs and data pipelines by day, and coding agents all day. I've also shipped 18 side projects, some with real users and real money.

flip through the projects
Jimmy Doré peeking through monstera leaves, making a peace sign next to a stuffed monkey
me, hiding in a monstera

By day, at Vianova

  1. 2021joined, first metrics and data feeds
  2. 2022the query language on Snowflake
  3. 2023a cache in front of the slow queries
  4. 2024plain-language queries with Claude
  5. 2025LLM evals in CI, AI-written reports
  6. 2026agents on a schedule, ticket to production

Vianova gives cities and mobility operators, from Munich to Malmö, dashboards, maps and an API on their mobility data. I joined in 2021, and I'm now Lead Backend Engineer and the largest contributor to its backend. I built the query API behind its dashboards, and the AI that writes queries on top of it.

open the case file
5 yearssince 2021
~80%of Query API commits
23×fewer rows on a year-long query
6automations every weekday

Things I made

Sorted by who it was made for.

€1,500 earned, 100+ usersShopify Scraper web app exporting Shopify products for WooCommerce migrationShopify ScraperExports a Shopify store's products into a file WooCommerce can import. A web app plus a Chrome extension. paid, nearly all quotes come through itTake A Beer landing page for beer tap rental and keg salesTake A BeerLanding page for a friend's business, renting beer taps and selling kegs for events. 5 people, me every dayMediaJanitor dashboard for managing a shared Jellyfin media libraryMediaJanitorFinds what to delete on a Jellyfin server shared with friends: old files, huge files, things nobody watched. Works with Sonarr, Radarr and Jellyseerr.

Real people use these

Money earned, a client who relies on it, people who would notice if it went down.

3 polaroids
Music Bingo on two phones: the game setup screen and a player's bingo grid of band namesMusic BingoMusic blind test for a room full of people. The presenter plays the tracks, and everyone ticks bands off their own grid on their phone. Live Buzzer on three phones: the create-session home screen, the host console ranking buzzes, and a player's first-place resultLive BuzzerParty 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 remote rock-paper-scissors duel with countdown and simultaneous revealChifoumiRock-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. City Battle interface comparing two French cities on open data metrics like population and densityCity BattlePick two of 35,000+ French cities and compare them on open data: population, area, density, altitude, bars, restaurants and more. Barathon: a dark map of Nantes dotted with bar grades, next to two phones showing a bar card and the bar rankingBarathonRate 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. Tournoi de Palets: the TV screen with current matches and a QR code, the organiser console, and a phone showing a team's next boardTournoi de PaletsRuns my old handball club's palets tournament: 48 teams on a laptop, a TV in the room, and each player's next board on their phone through a QR code. MonPetitProno Stats league table: the podium and the ranking with points, right results and exact scores per playerMonPetitProno StatsStats dashboard for a Mon Petit Prono league between friends, with rankings, prediction accuracy, player badges and head-to-heads pulled from the MPP API.

For my friends

Parties, bars and arguments to settle.

7 polaroids
Schedule Blocker on three phones: app groups with 24-hour day bands, the guided breathing ritual, and the final choice to return to your day or open anywaySchedule BlockeriOS 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. Rave Tycoon pixel-art scene of a free-party crowd dancing in front of a sound system stage at nightRave Tycoon preparation screen: choose the spot, the crew of DJs and the gear before the nightRave TycoonTycoon 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. Emotion AuraReads 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. Distorsion MovementGenerative art in Python. A grid of shapes, bent in real time by 20 distortion functions, with 48,000+ possible combinations.

Because I wanted to

To fix something for myself, or to see if I could.

4 polaroids
replaced by the HubPingMaster monitoring dashboard tracking API and server uptime in real timePingMasterWatches your APIs, landing pages and servers, keeps their uptime and response times, and posts in Slack when something goes down. replaced by the HubApple Health Tracker analytics chart of personal health metrics delivered to SlackApple Health TrackerSends my Apple Health data to a small server every hour, and posts charts of it in Slack every day. stoppedBinance Grid Bot interface showing automated grid trading levels and Slack control panelBinance Grid BotGrid trading bot for Binance Spot. It trades BTC, ETH and SOL against USDC, reinvests its profits and takes orders from Slack.

Retired

They did the job. Now they rest.

3 polaroids

a bit about me ↓

I build Python backends, data pipelines and AI features, and I work with coding agents every day.

At Vianova, I built the query API behind the dashboards, and the plain-language querying on top of it. On my own time, it's Hub, where a Claude agent plans my week and nothing moves until I say yes. The agents write most of the code. I write the specs and decide what ships.

shipped so far

What I'm good at

Each line says where I've done it, so you can check.

AI in a product

Agents that call tools and ask before they act. Classifiers graded against an answer key.

  • Claude Opus
  • Claude Haiku
  • agents with tools
  • TypeSafe
  • evals

98% agreement sorting my email

Building with agents

I write the spec, Claude Code agents build the tickets in parallel, and the tests decide what ships.

  • Claude Code
  • parallel agents
  • spec first
  • TDD
  • Ralph loops

350 commits for 10 to 15 hours of my time

Backend

APIs and background jobs, with enough tests that an agent can change them safely.

  • Python
  • FastAPI
  • Django
  • Pydantic
  • SQLAlchemy
  • Celery
  • pytest

81 scheduled jobs, 8,000 tests

Data

Pipelines and warehouse models on Snowflake and dbt.

  • SQL
  • PostgreSQL
  • Snowflake
  • dbt

top committer on 483 dbt models

Cloud and delivery

APIs and jobs on AWS, with Pulumi when a feature needs it. Docker and push-to-deploy on my own apps.

  • AWS Lambda
  • Step Functions
  • Kinesis
  • Aurora
  • Cognito
  • S3
  • Pulumi
  • Docker
  • GitHub Actions
  • GitLab CI

Hub deploys in about 4 minutes

Got an idea? Write me.

hello@jimmydore.fr ✎

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