Senior R&D Developer

David Guerizec

Building software since 1995. From real-time 3D engines for the Olympics to secure gateways and modern streaming infrastructure. I craft robust solutions across the full stack, from bare metal to cloud.

[email protected] Nantes, France
01

Working Style

End-to-end ownership

I like taking a subject from the first unclear problem statement to code, deployment, monitoring, documentation, and production support.

Systems thinking

I look at how code, network, infrastructure, data, security, and users interact before deciding where a system really needs to change.

Pragmatic engineering

I prefer solutions that are robust, understandable, and repairable over designs that are clever but hard to operate.

Production empathy

I care about the people who will run, debug, extend, and inherit the system after the first version ships.

02

AI Practice

Agentic coding

I use Claude Code and Codex as everyday development tools for codebase exploration, implementation, refactoring, debugging, review, and tests.

Context engineering

I work on turning project notes, source code, issue threads, and runtime feedback into clear tasks that an AI coding agent can execute reliably.

AI in products

I integrate AI features into real workflows: legal assistants, AI-assisted design, transcription, translation, and developer automation.

Agent tooling

I build tooling around agents: local previews, project docks, worktree environments, documentation capture, and repeatable development flows.

03

Expertise

Languages

  • C++
  • C
  • Python
  • JavaScript
  • PHP
  • Bash

Systems & production

  • Linux
  • Docker
  • Networking
  • Monitoring
  • Automation
  • Support

Domains

  • Real-time
  • Security
  • Telecom
  • WebRTC
  • Digital fabrication
  • Legacy systems

Data & protocols

  • Redis
  • PostgreSQL
  • MongoDB
  • InfluxDB
  • TCP/UDP
  • HTTP/2
04

Notable Projects

2026

Electron project dock for focused developer workspaces.

2026

CLI that gives every git worktree a stable local development URL.

2025

AI-powered legal assistant for French law.

2025

3D architecture editor with AI-assisted design via Claude.

2007

Open-source SSH proxy gateway for secure access management.

2018 — 2020
CNC Machine

Complete design and development of a CNC machine — software, electronics, and mechanical engineering.

Ongoing
IoT & Robotics

Personal projects in full-stack IoT development: software, electronics, and enclosure design.