Staff Engineer, ReactJS Barcelona Organizer, International Speaker

Señors @ Scale host Neciu Dan sits down with Kadi Kraman, software developer at Expo working on the tools that make React Native development as smooth as possible. Kadi's path started with C++ in a university maths degree, took her through Angular 1, scientific programming for pharmaceutical and defense companies, five and a half years at Formidable, and finally to Expo itself. From the limitations of early React Native to development builds, EAS workflows, fingerprint-based repacks, and the right way to think about over-the-air updates, this is the React Native conversation most web developers never get.

Señors @ Scale host Neciu Dan sits down with Nico Martin — open source ML engineer at Hugging Face working on Transformers.js, and Google Developer Expert in AI and web technology — to go deep on running machine learning models directly in the browser. Nico breaks down architectures vs. weights, quantization, tokenizers, ONNX, WebGPU, and why on-device AI is the right answer for a huge class of problems. He also shares the road from ski instructor and self-taught web developer to landing what he calls his dream job at Hugging Face.

Señors @ Scale host Neciu Dan sits down with Giorgio Polvara, Staff Engineer at Perk (formerly TravelPerk), who joined when the company was 15 people in two flats with a hole knocked through the wall and helped build the frontend foundations that still hold up at unicorn scale. Giorgio covers the multi-year migration from a monolithic frontend to vertical micro-frontends, why their first attempt with single-spa didn't work, how they pulled off a full rebrand behind feature flags without leaking, and the staff engineer mindset of treating every feature as a system improvement.

Señors @ Scale host Neciu Dan sits down with Zack Chapple, CEO and co-founder of Zephyr Cloud, and Nestor, the platform engineer building it, to go deep on module federation, microfrontends, and what it actually takes to go from code to global scale in seconds. They unpack why module federation is Docker for the frontend, how Zephyr composes applications at the edge in 80 milliseconds, and why the real unlock for enterprise teams isn't deployment — it's composition.