About David
Software Engineer and CTO with 18+ years building scalable, mission-critical systems in diverse industries (e.g AgriTech, HR Tech, Telecom, E-Commerce, Consumer Hardware). Passionate about reducing complexity, automating painful tasks, and enabling asynchronous, documentation-first teams. Proven track record of leading engineering teams in global startups, from reducing microservice chaos to implementing NixOS as a company-wide standard. Believer in open-source, hardware/software hacking, and building tools that outlive their use cases
French
Native or bilingual
English
Fluent
Japanese
Conversational
Korean
Basic
Spanish
Basic
Remote only
Primarily works remotely
Experience
- ListenField IncCTO & Staff level software engineerAGRICULTUREMarch 2021 - June 2026 (5 years and 3 months)Tokyo, JapanAgritech: Integrated Predictive Agronomic Platform (~40 people start-up, multi-cultural ~12 nationalities). Building the Gitlab for Farmers, working with satellite images to estimate farmers fields' health, production, and when their crops will bloom.Highlights:- Led the redevelopment of a 4 years old mobile & web app with 40,000+ users in 5 months, including the successful migration of existing users.- Built a forecasting weather api doing weather interpolation directly in SQL, working with hundreds of millions of DB rows.- Developed an IoT platform for tractors drastically reducing billing and management errors- Radically changed how the organization was working by promoting maximum Gitlab use and asynchronous communication for everyone. Gone from multiple meetings a day to around one meeting a week.- Introduced the company to Nix/NixOS, establishing it as the standard for both development environments and deployment processes across different teams.- In my first month, I also reduced the number of repositories by 90% and redesigned the infrastructure to minimize the use of microservices- Built a scalable pipeline using PubSub & cloud functions for satellite image fetching (100,000+ images/day) and worked closely with researchers to ensure the success of our projects- Reviewed all team members' code for a minimum of 4 hours each day, providing constant feedback and suggestions.- Built an extensive employee handbook using Hugo, providing a one-stop resource for new hires and a comprehensive documentation hub for the entire company
- JoynetiksFounder / Software EngineerJuly 2020 - Today (6 years and 1 month)Extraordinary Software Development Services- Joynetiks provides top-notch software development and consulting services to companies of all sizes, with a focus on bringing Joy to everyone involved.
- ZEPPELIN Inc.Lead Software EngineerJuly 2020 - December 2020 (5 months)Tokyo, JapanAR mobile apps / shopping platform- Implemented robust development processes, including CI and testing, to improve efficiency and code quality on a previously disorganized project.- Initiated the migration from Firestore to SQL on GCP (contributing to firebase in the meantime), successfully designed and built the entire backend for the app.- Guided and mentored other engineers in making informed decisions and delivering high-quality work.
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Education
- Programming for dummiesEPITECH - European Institute of Technology2011Programming for dummies