Stephan Hadinger
Director, Head Of Technology at Amazon Web Services (AWS)
Versailles, Ile-de-France
Summary
🤩
Rockstar🎓
Top SchoolStephan Hadinger is a seasoned technology leader with 14 years of experience, currently serving as Director and Head of Technology at AWS from Versailles, France. He combines strategic leadership with deep hands-on expertise in embedded systems and IoT, evidenced by meaningful contributions to high-profile open-source projects like the ESP32 and ESP8266 Arduino cores. His work focuses on low-level optimization—memory, networking and PSRAM initialization—and on extending lightweight language runtimes, such as adding collection and byte utilities to the berry scripting language. A graduate of École Polytechnique and Télécom Paris, Stephan blends rigorous engineering foundations with product-scale operational experience, often tackling subtle hardware-software integration challenges that improve reliability and reduce footprint.
14 years of coding experience
École PolytechniqueTélécom Paris
Github Skills (24)
garbage-collection10
c-language10
strings10
text-manipulation10
memory-management10
c1110
esp826610
ethernet10
c1710
language-design10
sys10
esp3210
esp-idf10
maps10
embedded10
Programming languages (9)
Github contributions (5)
berry-lang/berry
Feb 2021 - Nov 2022
A ultra-lightweight embedded scripting language optimized for microcontrollers.
Role in this project:
Back-end Developer
Back-end DeveloperContributions:1 release, 49 reviews, 186 commits in 1 year 8 months
Contributions summary:Stephan contributed significantly to the `berry-lang/berry` project, an embedded scripting language. They focused on enhancing the core language features by implementing new functionalities for the `map` and `string` classes, such as `map.keys()`, `string.tolower()`, and `string.toupper()`. The user also addressed a memory management issue related to garbage collection and added features like the `bytes` class with methods for byte manipulation and base64 encoding. Furthermore, the user introduced observability hooks to report low-level actions, demonstrating involvement in core language development and optimization.
berryscriptingembedded-scripting-languagerustultra
esp8266/Arduino
Nov 2019 - May 2020
ESP8266 core for Arduino
Role in this project:Embedded Systems Engineer / IoT Developer
Embedded Systems Engineer / IoT DeveloperContributions:5 commits, 10 PRs, 91 comments in 6 months
Contributions summary:Stephan primarily focused on optimizing the ESP8266 Arduino core, specifically related to memory usage and flash size reduction. They made several changes to improve the efficiency of string handling, including the addition of explicit converters and alignment macros. Their contributions also involved modifying the linker script to control the placement of floating-point code and adjusting the web server's mime type handling to minimize flash footprint.
platformioesp8266esp32arduino
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