Juan Cruz Viotti, O'Reilly author, Fractional CTO , JSON Schema TSC

Vetted expert in Technical Writer (9.5 yr.), Data Engineer (4.0 yr.), Data Mining and Management (3.0 yr.), Desktop Software (5.0 yr.), Back-End Web (10.0 yr.)

C2 (Proficiency) English

Expert (10+ years)

United Kingdom

Summary

Award winning University of Oxford alumni, O’Reilly author, member of the JSON Schema Technical Steering Committee, 10+ experience as a C++ system engineer, performance and data consultant, binary serialisation expert, ex-contractor at Postman (lead provider of API tooling), ex-Engineering Lead at Balena (popular IoT platform), and creator of the popular Etcher open-source desktop application (within the top 700 public repositories on GitHub as of 09/24).

Questions? Book a call to discuss your project

Main Skills

JSON Schema 5 yr.

C++ 10 yr.

Node.js 8 yr.

Programming Languages

C++ 10 yr. JavaScript TypeScript

C++ Libraries and Tools

C/C++/C# 2 yr.

Java Libraries and Tools

JSON JSON Schema 5 yr.

JavaScript Frameworks

Node.js 8 yr.

Third Party Tools / IDEs / SDK / Services

CMake

Project Management & Administration

Technical Writing

ID: 100-203-630

Last Updated: 2025-02-04

I'm a Computer Scientist with experience in startups, open-source, and academia. Some facts about me:

I offer consulting services on topics including C++, CMake, macOS, JSON Schema, software architecture, and data.
I co-authored an O'Reilly book: Unifying Business, Data, and Code: Designing Data Products with JSON Schema. Read it online on O'Reilly, or buy it from Amazon and eBooks.com.
At the University of Oxford, I won the 2022 CAR Hoare prize for the best dissertation and accompanying papers in the area of Software Engineering for my research around JSON BinPack. JSON BinPack made a breakthrough on 40 years of space-efficient telecommunication and binary serialization technologies, being more space-efficient than 13 other popular technologies in every single tested case
At Postman, I led the development of Starship, a C++ framework to create cross-platform native applications
I'm a TSC member of the JSON Schema open-source organization
I'm the original author of Etcher, a popular open-source cross-platform image flasher. This desktop app is recommended by a range of GNU/Linux distributions, and was highlighted on magazine
I lead a London-based C++ open-source research lab called Sourcemeta providing cutting-edge JSON-related technologies. There, I maintain high-performance JSON related projects, including a state-of-the-art JSON Schema compiler up to 200x faster than alternatives
I own the Learn JSON Schema reference documentation website, which serves more than 9k monthly users