JavaScript experts, mentors, speakers

By day, Maarten supports front-end teams at Essent with their Accessibility and Design System challenges. By night, he tinkers with the Web Platform.

I currently work at ByteDance as an Engineering Lead for E-Commerce payments system software driving the business of TikTokShop product in the US. I graduated from Carnegie Mellon University with a Masters degree and Vellore Institute of Technology with a Bachelor's degree. I’m a seasoned Silicon Valley professional in the Payments domain with proven engineering expertise for 10+ years. I pioneered the Software Engineering marvel resulting in the increase of user count of products by about 800 times in less than 6 months, generating kick-start revenue of $120k per week during 0 to 1 product growth, tripling the revenue from $5 billion to $14 billion in less than 5 years by getting over the plateau growth, for some of the prominent products in the world like iPhone, Apple Watch, iPad, AWS Amplify, Amazon Alexa mobile app, TikTok shop and Oracle backend server supercluster. The by-products of these business results are multifold improvement in Engineering productivity and grooming myriad software professionals for world class companies like Apple, Amazon, Oracle, SanDisk.

Simon Ouyang is a Full-Stack + AI Engineer focused on building production-ready React applications and reliable AI workflows. He has worked in early-stage, YC-backed startup environments delivering 0→1 systems across both frontend and backend. His independent research explores agentic workflows, RAG architectures, and evaluation-driven AI development. Simon speaks at React Summit US 2025 and JSNation US 2025, where he shares practical insights at the intersection of modern frontend engineering and trustworthy AI.

Dmitry is a Microsoft veteran, working for more than 13 years. He started as a Technical Evangelist, and in this role presented on numerous conferences, including twice being on stage with Steve Ballmer. He then worked for 2 years as Senior Software Engineer, helping big European companies to start pilot digital transformation projects based on AI and ML. As Cloud Developer Advocate, Dmitry focuses on creating educational content and working with academic and research institutions. He is also an Associate Professor at MIPT, HSE and MAI in Moscow, a big fan of functional programming and F#, and a maintainer/primary developer of mPyPl library. In his spare time, Dmitry explores Science Art and Technological Magic, as well as performs Chinese tea ceremonies. He can be reached at soshnikov.com.

Dipanjan (DJ) Sarkar is a Data Science Lead at Applied Materials, leading advanced analytics efforts around computer vision, natural language processing and deep learning. He is also a Google Developer Expert in Machine Learning. He has also been recently recognized as one of the Top Ten Data Scientists in India, 2020 by Analytics India Magazine & TechGig. Dipanjan has advised and worked with several startups as well as Fortune 500 companies like Intel and Open Source organizations like Red Hat (now IBM). He primarily works on leveraging data science, machine learning and deep learning to build large- scale intelligent systems and evangelizing data science to the community. Dipanjan is also a published author, having authored several books on R, Python, Machine Learning, Natural Language Processing, and Deep Learning.

Software Engineer with over a decade of industry experience in developing reliable and scalable software systems. Specialities & Interests: Distributed Systems, Server Engineering, API Design, System Architecture, Data Modeling, Caching Solutions, Databases, Algorithms, Server Infrastructure and Operations.

After working as a science teacher for a few years, Sylvana transitioned into software engineering as a means to provide a quality education to all learners. She began her career as an apprentice at Codecademy and is now a software engineer at the company. During her time at Codecademy, she has gained experience with React, Next.js, and Typescript and has led initiatives like the tech reading club and dev workshops.

Samuel Pinto is a Frontend Engineer since 2013, he has been working with large using facing applications in companies like Microsoft, Bumble, and OLX. He worked from 5 different countries and loves to be involved and learn new cultures.

Sebastian Witalec is the head of Developer Relations at Weaviate. He loves working on both serious and fun projects, and one day he will use his robot army to conquer the world. He is always happy to learn about new stuff and to pass the knowledge as far as his voice (or the wire) can take him. Sebastian is based in Copenhagen, actively working with various Dev communities across Europe. When not acting techie, he is a massive football fan/player (probably bigger at heart than in skills).

Jordan is the frontend technical lead at Mysten Labs. He is passionate about Taco Bell and TypeScript.

Frontend Engineer working at Docplanner. Passionate about Web technologies, JavaScript and Vue.js. Founder of Escuela Vue (http://www.escuelavue.es/). Voracious reader of ancient history and philosophy (Stoicism).

Backend Software Engineer for +10 years in industries such as telco, online betting, and financing, embraced the passion for leading and caring for people 3 years ago, being now at OLX Group as Engineering Manager.

Game developer with a healthy curiosity for the web. Worked at Wooga for a few years, then freelanced in several game studios. Now in charge of making tech work at PlayPack here in Berlin.

John joined React Flow in 2022 and takes care of the documentation, communication and community.

Rodrigo is a focused developer who produces digital projects for agencies around the world. He has 20 years of experience using various methodologies and tech in most web and mobile projects. He has a strong knowledge base of the WordPress world and is very engaged with the community: building custom themes, plugins, and core customizations. He specializes in WordPress, developing for the front-end back-end and in managing digital projects.

Siriwong is an Engineer Manager at Coinbase. He enjoys working on products in the latest technology space. Previously, he worked at Facebook in News feed, Videos, and Portal. At Coinbase, he leads the team to innovate in the Crypto space.

Sohan is a Lead Developer Advocate at AuthZed, based in the Netherlands. He started his career as a developer building mobile apps and has been living in the cloud since 2013, in companies such as Amazon, Fermyon and Gupshup. He is also an O' Reilly author, and an Agentic AI Foundation Ambassador. He has always been interested in emerging technologies and how it shapes the world around us.

I am an Engineering Manager in Fintech at Booking.com, where I lead a high-performing team responsible for payment processing for accommodation partners. My team supports payment operations at a massive scale, serving more than 10 million partners and processing billions of euros every month. Additionally, I am the horizontal owner for Accelerate AI in Fintech, overseeing more than 50+ AI initiatives across the fintech organization. My key objectives include scaling AI efforts across five departments and 1,000+ employees, as well as developing enablement strategies for upskilling teams through an AI Ambassador group. I also mentor senior leadership at Booking.com including VPs, SVPs, senior directors, and directors. and involved in the Super 40 GenAI Trainer program to train Booking Engineers staff on generative AI.

Engineering leader with 10+ years of experience in software development, testing infrastructure, and team leadership. Passionate about delivering high-quality products, empowering teams, and fostering a culture of collaboration and continuous growth. Skilled in engineering management, project execution, and aligning technical excellence with business goals.

Eric is a Solutions Engineer at Braintrust, helping engineering teams move AI from experiment to production through evaluation and observability. He previously spent a decade in pre-sales at AI and data startups, including Rasa and OmniSci (formerly MapD), where he was an early sales engineer. Earlier in his career, he designed electronic trading systems for fixed income at Lehman Brothers, and now focuses on turning real-world AI use cases into production systems.

Founder and CEO, GraphCMS

Clint Cameron is a Product Marketing Manager at Sonar, a leader in software static analysis solutions. He joined Sonar in 2018 and enjoys passionately and transparently promoting the value of SonarSource tools to developers at all experience levels. Previous to Sonar, he has held roles in product and project management, consulting, sales operations and engineering.

Amit Hanoch is a Tech Lead at monday.com with 10 years of experience in software engineering. A graduate of the Mamram unit with a B.Sc. in Computer Science, Amit focuses on navigating complex systems. His work focuses on making large-scale architectural shifts predictable and efficient through automation. In his spare time, Amit creates coffee videos online, where he explores the technical side of brewing the perfect cup.

Adam Jahr is the co-founder of Vue Mastery, the ultimate learning resource for Vue developers and the biggest financial backer of the Vue framework. As an e-learning educator, he has taught hundreds of thousands of developers worldwide and teaches live at conferences across the globe. Adam is a proud Vue.js Community Partner. When he isn't teaching Vue, he enjoys creating interactive art installations.