Freelancer profile translated to English.
Back to original languageAbout David
Expert CaaS : Caring as a Service
You give me the context + constraints + deadline, I will give you a clear and actionable plan from day one.
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Good tech grows businesses. It doesn’t make shiny new toys
Fullstack Tech Lead with 11+ years of experience, I build, evolve & maintain SaaS & Shopify products with a pragmatic approach: deliver often, stabilize, control technical debt, and maximize your business profitability.
My role: support your objectives (conversion, time-to-market, reliability) with a clear execution plan — and code that lasts.
What I do (concretely)
- Production-grade LLM/RAG/agents (modeling, RAG & GraphRag, orchestration, evals, Mastra)
- Multitenant SaaS
- Maintainable React & Next frontend
- TypeScript APIs & back-end
- Mongo, SQL & Convex <3
- Code recovery, debt reduction, quality improvement (tests, CI)
- Shopify Plus
- Store development (Liquid) + SEO & CRO performance optimization
- Headless Shopify Hydrogen
- Custom Shopify Apps
- Design of support/sales/internal chatbots (conversational UX + flows)
- Process automations
What you get (really)
- Smooth delivery: breakdowns, prioritization, regular demos
- Proactive communication: short updates + reports + risk alerts
- A healthy technical foundation: conventions, strict typing, tests, CI/CD
- A higher perspective: my experience as a founder of 6 companies + 80 clients supported in 10 years & the perspective that comes with it
Stack (mainly)
- React
- Shopify (Plus)
- OpenAI APIs (LLM + embeddings), RAG, Agentic
- Hydrogen/Remix
- Next.js
- TypeScript
- SQL & MongoDB
CII Approval
- CII approved service provider: for eligible SMEs and innovation projects, a portion of expenses may qualify for the Innovation Tax Credit
- Eligible expenses are considered up to €400,000/year
French
Native or bilingual
English
Native or bilingual
Can work on-site
Paris (up to 50km), Toulouse (up to 20km), Marseille (up to 20km), Bordeaux (up to 20km), Lyon (up to 20km)
Experience
- Delicery
On Malt
Audit of existing system (SaaS + Shopify+)E-COMMERCEFebruary 2026 - March 2026 (1 month)Paris, FranceTechnical, product, budget & security audit of a platform mostly developed and shut down due to a dispute with another provider.Advisory & mediationProposal for a plan to take over the existing system vs. restarting from scratch to reduce Time to Market without risking rapid technical debt accumulation. - SunologyTech Lead Shopify AppDecember 2023 - December 2023 (1 month)Tech Lead NodeJS & Shopify AppDevelopment and design of a multi-shop app to control and distribute order flows to factories.Specs, team management, technical development.
- SAS FLIITWeb ArchitectNovember 2022 - November 2022 (1 month)Toulouse, France- NodeJS / Mongo code audit- Proposal of solutions to improve performance- Architecture proposal for software suite redesign- Prototyping of a schema manager / isomorphic models
Reviews
Recommendations
VT
FU
+6
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Education
- BTS SIO SLAMBahuet2014
- DeveloperEpitech Tek2D2015