Discovery call
We map the terrain together — goals, constraints, what success actually looks like at the summit.
01
Base camp
Alt. 0 m · 45.7640° N
Backend Developer Symfony · Senior Olivier PETIT
Turning your vision
into a summit —
one sprint at a time.
02
Camp 1 · About
Alt. 900 m
The rope team
Émilie · Delphine · Vincent · Louis (lead & photographer)
What I look for in my missions — SME, startup or large group — is that rope-team spirit: a team moving toward the same goal, where mutual trust and support matter as much as technical skill to reach the top.
In the mountains, you rarely
reach a summit alone.
That conviction guides the way I work. A climb is a deeply personal challenge: it takes endurance, preparation and the will to see it through. But without a tight-knit rope team, complete trust and mutual support through the hard sections, it stays out of reach.
A senior backend developer, I approach every project like an expedition: a clear objective, a route mapped out together, and a climb where everyone knows they can count on the others.
03
Camp 2 · What I bring
Alt. 800 m
What I bring
to your expedition.
A 360° service, from base camp to summit and beyond. Build, deploy, maintain, augment with AI: your application's entire lifecycle.
01
Build & modernise
Build or modernise your applications.
To launch a new product, or pull a legacy one out of the mud.
Tailored applications and APIs with Symfony 7 & API Platform, and the right components: Messenger, Workflow, Scheduler, Security. A healthy base to start from. And when your existing code holds you back, I modernise it step by step, from procedural to a clean, tested architecture, without ever taking production down.
Symfony 7API PlatformLegacy refactor
02
Deploy
Secure deployment, from local to production.
To ship calmly, with confidence.
A controlled deployment chain: reproducible Docker environments, CI/CD pipelines, secret management and zero-downtime releases. From your local machine to the server, safely.
DockerCI/CDZero downtime
03
Maintain
Keep your apps in good health.
For a product that stays reliable, current and secure over time.
Security patches, version upgrades, performance monitoring and bug fixes. Your dependencies stay up to date, your application stays fast and safe, long after launch.
SecurityUpgradesMonitoring
04
AI
AI, embedded where it counts.
To automate and stand out: no gimmicks, no lock-in.
Useful, differentiating AI wired straight into your stack through the Symfony AI component, with Claude (Anthropic) and Mistral. Agentic workflows, data processing and LLM-native features, reviewed with the same rigour as the rest of the code.
Symfony AIClaudeMistral
Method — how we climb
How we climb
together.
Four phases, two-week rhythm, no surprises at altitude. Each camp is a moment to look back at the route, check the gear, and agree on what we're carrying up next.
Scoping & specs
Architecture, API contracts, sprint plan and milestones. A written route before we leave base camp.
Dev sprints
Two-week sprints with weekly demos. Tests at every camp, deployable trunk, no surprises.
Delivery & handoff
Documentation, infra runbook, a 90-day support and the team owning what we shipped.
Maintenance
Security patches, performance monitoring, minor evolutions and on-call support. The route stays open long after the summit.
Step 01~ 60 min
Discovery call
Goals, constraints, success criteria.We map the terrain.
Step 021 week
Scoping & specs
Architecture, contracts, milestones.We plan the route.
Step 032-week sprints
Dev sprints
Weekly demos, tests at every camp.We ascend step by step.
Step 04+ 90 days
Delivery & handoff
Docs, deploy, training, support.We reach the summit.
Step 05Ongoing
Maintenance
Patches, monitoring, evolutions.We keep the route open.
Gear check —
Already have a process? I fit into it. Six years of missions means six years of adapting to different teams, tools and rhythms — I know the gear.
Jira
Linear
Notion
GitHub
GitLab
Slack
Confluence
Teams
04
Camp 2 · Skills & toolkit
Alt. 2 500 m
Skills &
toolkit.
Six years roping up with PHP and Symfony on production loads — fintech at 30 000 users, a telecom internal platform, and the patient kind of refactor that makes a 9-year-old monolith breathe again.
Inventaire · Expédition technique
Backend
Frontend
DevOps
Qualité
AI & Agentic
Ethics — how I build
Built right —
not just fast.
Code doesn't just run it consumes energy, handles people's data, and outlives the sprint that shipped it. These aren't policies bolted on after. They're part of the route.
01
Data privacy
Privacy by default.
No third-party trackers, no fingerprinting, no analytics that follow users across the web. Data stays local or on your servers never sold, never fed to ad networks. GDPR-aligned, always.
RGPDNo trackingLocal-first
Gear —
Mistral AI
Proton Mail
Infomaniak
02
Green hosting
Clean ascent.
Every HTTP request has a carbon cost. Servers — this portfolio included — run on renewable-energy infrastructure. Performance and efficiency aren't just UX: they're the smallest footprint at altitude.
Renewable energyPerf = carbonLow footprint
Gear —
Infomaniak
Hetzner
Lighthouse
03
Sustainable code
Built to last.
Code shipped today will be read, debugged, and extended in three years. Clean architecture, tested paths, no clever hacks that look smart until they don't. Maintainability is the long-term summit.
Clean arch.Tests firstDocs included
Gear —
PHPStan
PHPUnit
Rector
04
Digital sovereignty
Sovereign stack.
Tools, data and infrastructure that stay in Europe. No GAFAM dependency baked into the architecture — open-source stacks, EU-hosted storage, vendors that answer to European law.
EU-hostedOpen sourceNo lock-in
Gear —
Scaleway
OVHcloud
Infomaniak
Mistral AI
05
Camp 3 · Expeditions
Alt. 3 800 m
Expeditions &
missions.
Routes I've climbed end-to-end fintech APIs at production scale, telecom platforms, and the patient refactors nobody puts on a press release.
Alt. 2 400 m
Oct 2025 → Jan 2026
Factomos
— E2E tests from scratch.
Playwright end-to-end test suite set up from scratch on a Laravel billing SaaS covering the critical flows of 13 000 entrepreneurs, via Sqwer.
View mission ↗
Lyon · via Sqwer · 2025
Alt. 3 800 m
2022 → 2025
Mon Petit Placement
— fintech API.
Symfony & API Platform backend orchestrating investment flows for 30 000 active users RabbitMQ workers, Kubernetes pipelines, zero-downtime releases.
View mission ↗
30 000 users · Lyon
Alt. 3 200 m
2020 → 2022
Orange France
— internal platform.
Maintenance & full refactor of a legacy mobile / IoT fleet manager PHP procedural → API Platform + Vue.js, dockerised, GitLab CI, SCRUM.
View mission ↗
Orange · Lyon
Alt. 1 600 m
2017 → 2018
Mes marques en bourse
— brand registry.
First climb. Maintenance & internal apps for the brand-and-listed-company registry, plus the database that fed them. WordPress backbone, custom tooling on top.
View mission ↗
Romans · 2017
Client feedback
Expedition
reports.
Direct words from the teams I've had the chance to work with.
Olivier worked on a project with the Sqwer team. He showed great autonomy and energy. He fulfilled the mission he was given perfectly, with great attention to communication at every stage. It was a pleasure to collaborate with him and we will do so again without hesitation.
Factomos · E2E testing · 2025 View mission ↗
"Particularly efficient" is the phrase that comes to mind when I think of Olivier. I had the pleasure of knowing him for one year, during which we collaborated on the mesmarquesenbourse.com project for Business Invest. He was responsible for the smooth operation of the brand and listed-company search engine, and collaborated effectively with IT partners. He leveraged his developer skills to automate certain user-processing tasks — crucial for team efficiency. His perseverance and enthusiasm are real assets.
Mes marques en bourse · 2017 View mission ↗
06
Summit · Contact
Alt. 4 808 m
Let's reach
the top —
together.
Available for new missions right now. Long-form asynchronous email preferred calls scheduled after a first written exchange.
Email
olivier.petit@pm.me
Phone
+33 6 67 11 45 74
LinkedIn
/in/olivier-p-a9191014b
GitHub
@petite-olive-verte
Curriculum vitae
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Olivier PETIT
