Freelancer profile translated to English.
Back to original languageAbout Pierre-Antoine
INSA engineer in electronics and computer science, I have been doing back & front web development since 2013, for startups, scale-ups, or personal projects. I have always worked on theMongo/Node/Apollo GraphQL/Reactstack and have mastered it in depth. I have also worked extensively with theNestJSframework and ported an app to iOS/Android using **Capacitor**. I have carried out numerous integrations of third-party services such as **Stripe**, **Salesforce**, **Shopify**, **Google Sign in**, etc.
My missions range from thecomplete development of a V1for a startup, includingconsulting and supporting the founders**, to the **development of complex applicationsserving hundreds of thousands of users within an existing team.
I have developed projects in various sectors, some focusing on data management (financial, user, external APIs...), others on the user interface (React components, audio/video players, etc.). I can therefore intervene at any level of this technical stack and adapt quickly to your needs. I have also supervised development teams on various projects to ensure code base uniformity and adherence to business/UX/UI requirements.
Having started to take an interest in computer science through hacking and cryptography, I have asensitivity to cybersecurity issuesand was a member of the CLUSIF (Information Security Club) in Lyon. This interest in cryptography has also led me to blockchain technologies, which I follow closely. I have some development experience in this field (creating a wallet, signing transactions, creating smart contracts). This interest has also led me to financial data storage/analysis/visualization.
If needed, I speak and write English fluently.
I am looking for remote missions with no duration preference.
French
Native or bilingual
English
Native or bilingual
Remote only
Primarily works remotely
Experience
- Adapt and JoyComplete development of a responsive appFASHION AND COSMETICSJuly 2025 - October 2025 (3 months)Complete development of a clothing adaptation recommendation application for people with reduced mobility, intended for healthcare professionals.Stack: Mongo + Nest + GraphQL + React + Shopify SDKNotable elements:- Implementation of a Shopify adapter to retrieve collections and items from an existing store and create orders- Generation of quote PDFs via a Bull job queue and a serverless Gotenberg worker- Responsive application
- Ministère de la Transition écologique et de la Cohésion des territoiresDevelopment of the Trackdéchets platformPUBLIC SECTORApril 2024 - Today (2 years and 4 months)Development and improvement of various back & front components of the French waste management platform, Trackdéchets. Management of the merger with the RNDTS registry.This is a project with strong business and regulatory constraints, whose infrastructure must handle +200k requests/min, with a service continuity requirement for its ~400k user establishments.Stack: PostgreSQL + Prisma + NodeJS + Apollo GraphQL + React.Notable elements:- Complete redesign of the tracking form management for end-of-life vehicles- Implementation of the entire registry export logic during the merger with the RNDTS registry: indexing/filtering/retrieval architecture for over 30 million database lines, data transformation/streaming pipeline to CSV/XLSX in S3 + all the frontend associated with the export process.- Rotating role of support engineer, including answering user and integrator questions, handling bugs in real-time, and conducting training sessions.
- ShoogaEnd-to-end development of a SaaS web and mobile appREAL ESTATEAugust 2023 - September 2024 (1 year and 1 month)Complete development of an application for transferring contacts and files, as well as publishing private news.Stack: Mongo + Nest + GraphQL + React (+ Capacitor for mobile).Supervised a team of freelancers to assist with initial frontend development.Agile process to iterate quickly based on client feedback.Notable elements:- Responsive application and mobile porting via Capacitor (iOS & Android)- Complete mobile integration with push notifications, contact import- White-label application with interface and communication customization (email/push) and Apple Store/Android Store deployment pipelines- Custom news feed with media upload, real-time update with WebSocket- Integration of a subscription system via Stripe
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Education
- Engineer in Electronics/Computer Science specializing in signal processingINSA Lyon2013Electrotechnique, Electronique, Informatique bas niveau (FPGA, assembleur, C,...), traitement du signal (audio/image).