Freelancer profile translated to English.
Back to original languageAbout Stanislas
My professional journey in a nutshell:
💡 Epitech and Chung Ang University Alumni.
💡 Former Head of Tech at NomadHer (1 year and 8 months, from 500 to 200K users).
💡 Lead Frontend Developer at Innosonian (1 year and 8 months).
💡 Web and Mobile Engineer in South Korea (4 years total).
💡 7+ freelance missions.
🌐Portfolio Website→ stanislascuenat.com
My quality commitments:
✅Tested codethrough TDD (Test-Driven Development) methodology.
✅Daily deliverablesto allow you to track project progress in real-time.
✅Absolute transparency**: I provide a **daily reportto my clients at the end of the day, **by email or in a meeting**.
✅Zero bugcommitment: if a bug is present in my code and has not been modified by a third party, I commit to fixing it **for free**.
My approach:
A-to-Z support: from design to production. Daily deliveries to avoid unpleasant surprises. A truly agile method, leaving you open to all your requests.
Whether it's developing intuitive and performant interfaces, managing a complete backend, or testing and maintaining your application, I'm here to help.
Why choose me?
With over6 years of experiencein various fields (web, mobile, SaaS, and embedded), I specialize in mobile and web development (React / React Native). I place great importance on UX and UI.
My expertise:
🔹 React Native mobile development
🔹 Web development
🔹 React frontend development
🔹 Node.js backend development (NestJS, Express, Hono)
🔹 Applications fully managed on Firebase
English
Fluent
French
Native or bilingual
Korean
Basic
Can work on-site
Lyon (up to 50km), Paris (up to 50km), Marseille (up to 50km), Bordeaux (up to 50km)
Experience
- TagadapayLead DeveloperBANKING AND INSURANCEJune 2025 - Today (1 year and 2 months)Lyon, France- Maintenance and evolution of the PCI-compliant payment orchestration system.- Management and optimization of high load increases (1M+ requests/day) without service degradation- System scalability allowing the processing of volumes from 20k USD to 500k USD per day- Direct contribution to revenue growth through improved payment reliability and performance- Maintenance of the existing CRM, reducing operational friction for internal teams- Design and development of a new CRM (React, tRPC, shadcn/ui) aimed at improving team productivity and reducing maintenance costs- Technical migration from Next.js to React + Vite, improving maintainability, build times, and developer experience- On-call duty for critical systems (payments & subscriptions) with high SLA and availability stakes- Securing critical flows with a direct impact on customer trust and retention
- PackativeSoftware EngineerE-COMMERCEJune 2024 - November 2024 (5 months)Seoul, South KoreaWorking on the new e-commerce application (back-end and front-end): integrating new designs and making them responsive. Revising state management using normalized data with Zustand. Exploiting client-side and server-side queries with Next.js. Applying basic functional programming principles to manage effects (Result and Option monads) and refactoring several core systems into pure, functional versions. Managing each front-end use case with TDD and Zustand following a functional approach.In collaboration with the CTO, we refactored the back-end to follow Clean Architecture and SOLID principles. Implemented a unit testing system applying TDD principles at the core of the software. Bug fixing. Creation and integration of a coupon/rewards system. Creation and integration of a comparison system. Maintenance of a 3D editor developed in TypeScript.
- NomadHerHead Of TechTRAVEL AND TOURISMApril 2022 - November 2023 (1 year and 7 months)Paris, FranceFrom 500 to over 200,000 users – Solo management of a rapidly growing social network.Maintenance and addition of new features to the React Native mobile application with the Firebase suite and TypeScript.Development and management of the back-end with Nest.js, hosted on Cloud Run (GCP), entirely designed with TDD and Clean Architecture.Migration of the application's business logic from the Firebase Mobile SDK to our back-end services, without service interruption.Refactoring of the GCP environment, setting up IAM roles for production environments and our CI/CD.Management of reservations, ticketing, and payments with Stripe, GCP Cloud Task, and Firestore.Automated CI/CD with GitHub Actions. Automated deployments to the App Store and Play Store.ElasticSearch cluster hosted on GCP, with automated data indexing from Firestore.Creation of multiple Kibana dashboards with Data Views.Refactoring of the NoSQL database architecture (data normalization and denormalization).
Reviews
Jean-Baptiste
Together
Reviewed on 5/19/2025
It was a pleasure working with Stanislas on our mobile app project. He is a true professional who can effectively meet all your needs and propose solutions adapted to the challenges.
I recommend him 100% if you are looking for a competent and serious developer!
Recommendations
+3
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
- Master's degreeEpitech2020En 5eme année au sein d'Epitech Lyon, je profite de mon experience acquise au cours de mes projets personnels, stages et formations pour devenir freelance.
- Associate's degree3w Academy2015Formation de 3 mois dans le domaine du développement web. Formation reconnue RNCP bac +2.