
Fah Yik Yong
Full-Stack Dev | AI Integrations | 10 years Exp
Salary / Daily rate
Paris, France
Freelance
Can come onsite
Skills
Languages
About me
Intro
Full-stack developer with nearly 10 years in the industry, specializing in backend (Node.js/TypeScript) with 4+ years in React & React Native. Recently focused on AI integrations, adding LLM-powered features like AI recommendations, chat, and automation into real products. I built Jumo (heyjumo.com), an AI-powered nutrition app on web and mobile. Clean, scalable code with a focus on best practices. Let's connect to discuss how I can help you achieve your goals!
Work experience
Frontend developer
The Mobile-First CompanyFreelance
Jul 2025 - May 2026
11 months
Paris, France
Built Allo’s AI-powered telephony desktop application from the ground up
Backend developer
MuchoFreelance
Dec 2024 - Mar 2025
4 months
Paris, France
CTO
Tango
Jul 2023 - Sep 2024
1 year 3 months
Paris, France
Marketplace for intergenerational connections • React native (Mobile front-end) • https://apps.apple.com/fr/app/tango-aide-%C3%A0-domicile-seniors/id6462143725 • https://play.google.com/store/apps/details?id=com.jointango.app • Node.js (Express backend)
Product Engineer
Amie
May 2022 - Apr 2023
1 year
Remote, OR 97458, USA
from POC to 1000 DAUs 🚀 • React (NextJS) • Node.js (Express) • Postgresql • Docker / Kubernetes
Spendesk
Apr 2019 - Jan 2022
2 years 10 months
Paris Area, France
Software Engineer (Web Backend)
Apr 2019 - Jan 2022
2 years 10 months
Paris Area, France
Squad Lead
Nov 2019 - Jun 2021
1 year 8 months
FELFEL - good food at work (We are hiring!)
Jul 2015 - Mar 2019
3 years 9 months
Lead Engineer
Nov 2016 - Mar 2019
2 years 5 months
• Responsible for all backend systems (Python Django/Flask, C# .NET) • Led systems migration from monolith to distributed event based services (python + rabbitMQ) • Set up new infrastructure on Openshift (Kubernetes) • Set up single identity access and management with Keycloak • Shared responsibility for development of revamped proprietary logistics and distribution systems to allow for business expansion • Rebuilt inventory, ordering and payment processes previously optimized for business operations to also meet accounting and audit requirements • Implemented and laid foundation for FELFEL's engineering best practices (standardised protocols, version control, agile workflow, etc.)
Tech Development (Full Stack Engineer)
Jul 2015 - Nov 2016
1 year 5 months
• Developed and maintained all of FELFEL’s end-customer and backoffice web applications – backend on REST architecture in C# ASP.NET and Python Django, frontend in AngularJS • Implemented unique logistics and inventory processes at FELFEL in C# ASP.NET, reducing work time in sorting processes and allowing tracking of every single product through its life-cycle • Designed and implemented demand forecasting with supervised learning at FELFEL in Python, automating process and significantly reducing food waste • Assisted in design and production of FELFEL refrigerators – custom hardware with single board android computer and sensors
Education
ETH Zürich
Master's Degree, Energy Science and Technology
2013 - 2015
3 years
focus on sustainable technologies
National University of Singapore
Bachelor of Engineering (BEng), Mechanical Engineering
2008 - 2012
5 years
CentraleSupélec
Engineering
2011 - 2011
1 year
Student Exchange Programme