Freelancer profile translated to English.
Back to original languageAbout Quentin
I am CTO and co-founder of Billabex, an AI SaaS for invoice recovery. I code the product daily; it's not theory, it's in production.
I take on short-term assignments in parallel, between 1 and 8 weeks. I do development (complex features, integrating AI agents with LangGraph, refactoring architecture, GraphQL APIs), consulting (architecture audits, stack choices, technical scoping, product AI strategy), and tooling (Nx monorepo, CI/CD, LangChain + LangSmith pipelines, AWS infrastructure, developer experience).
I have 15 years of production experience. I founded 3 companies (Beekast for 5 years with a team of 20, Capesense, and Billabex), led the Business Tech Solutions tribe at PayFit, and have always had a foot in business as much as in tech. I code every day and get my hands dirty.
Current stack: TypeScript, NestJS, Next.js, LangChain, LangGraph, AWS Bedrock, DynamoDB, GraphQL, Nx.
Remote from Nantes. Occasional travel without issue.
French
Native or bilingual
English
Fluent
Remote only
Primarily works remotely
Experience
- BillabexCo-founder & CTOFebruary 2024 - Today (2 years and 6 months)Co-founder and CTO. AI SaaS for invoice recovery automation. I architected and developed the product from scratch: NestJS, Next.js, LangChain, LangGraph, AWS Bedrock, DynamoDB, GraphQL, Nx monorepo.
- PayFitBusiness Tech Solutions DirectorNovember 2021 - May 2024 (2 years and 6 months)I led the Business Tech Solutions tribe at PayFit. My scope covered all the company's business tools: integrations with HubSpot, Salesforce, the help center, and the custom internal tools we developed for the teams.We were in a scale-up context with ~1000 people in the company. My role was to ensure that technology served the business teams effectively, not the other way around.
- Vite mon MarchéCTOOctober 2020 - October 2021 (1 year)I took over the CTO position as a temporary fix after the previous one left. I stabilized the technical stack and made difficult choices in a challenging economic context to reduce the cost of service delivery.
Recommendations
These freelancer profiles also match your criteria
Agatha Frydrych
Backend Java Software Engineer
4.7
(3)
2
Baptiste Duhen
Fullstack developer
4.6
(4)
5
Amed Hamou
Senior Lead Developer
4
(2)
7
Audrey Champion
Web developer
4.3
(3)
4
Education
- Engineering Degree, Information Systems and TelecommunicationTroyes University of Technology2011Titre Ingénieur, Système d'information et Télécommunication