JavaScript experts, mentors, speakers

Explore personalities and their talks, workshops, videos, and articles. While we focus primarily on JavaScript and frameworks like React, Vue, Svelte, and Node, you may find experts on other fields on our Portal. To name a few – Testing, DevOps, Machine Learning, and many more!
Haris Rozajac
Haris Rozajac
Grafana Labs, USA
Haris is a Software Engineer at Grafana Labs, where he makes contributions to open-source Grafana. Currently, he’s on the Explore squad, focused on improving data troubleshooting and discovery experience.
Gil Eckstein
Gil Eckstein
Wix, Israel
Gil is a Performance Architect at Wix Viewer. For the past eight years, he has been helping build the application that powers Wix websites. As part of the Viewer team, Gil works on making it easy for anyone to create their dream website and for developers to extend the functionality of their Wix websites. With over 10 years of experience in software development, Gil started his career in networking and Linux but always had a passion for web development. For the past four years, he’s been leading the Viewer performance team, working on Wix websites performance and ensuring they load as fast as possible. In his free time, Gil likes working out at the park, playing basketball, and working on his personal projects—many of them built with AI ;)
Karina Ionkina
Karina Ionkina
Bloomberg, USA
Karina Ionkina works as a senior software engineer on the Data Visualization team at Bloomberg, which builds and maintains multiple full-stack tools used by the company’s reporters and data visualization developers (see examples of these visuals at https://www.bloomberg.com/graphics). Outside of work, Karina likes to play tennis, paint, and sew. Karina earned her bachelor’s degree in computer science from Hunter College (CUNY).
Yevhen Treiher
Yevhen Treiher
UX News, Barcelona
Senior Product Designer at FUIB and founder of ux-news.com
Walmyr
Walmyr
Talking About Testing online school, Barcelona
Hi, I'm Walmyr. I'm a software engineer who loves testing. I'm also a clean coder, blogger, YouTuber, podcaster, Cypress.io Ambassador, online instructor, mentor, speaker, an active member of the testing automation and JavaScript communities, and a fan of good music, tattoos, gardening, vegan 🌱 food, and skateboarding.
Michael Hoffmann
Michael Hoffmann
Freelancer, Germany
Senior Frontend Developer & Freelancer
Ariene Maiara
Ariene Maiara
G2i, Brazil
Passionate about technology, innovation, and learning new programming languages, I have been working with software and web development for over 9 years. I have strong front-end and back-end skills. Currently working with React/React Native. I also have experience working with agile methodologies such as Scrum and Kanban.
Guilherme Vieira
Guilherme Vieira
Shopify, Canada
You might be familiar with HTTP GraphQL APIs. Did you know GraphQL does not have to be delivered over HTTP? We can use GraphQL in some different contexts. asynchronous queries, batch operations, user-provided scripts, WebAssembly, webhooks, and many more. We will explore how Shopify uses GraphQL in different contexts and how you can extend your current GraphQL schema beyond HTTP APIs.
Idan Rozin
Idan Rozin
AI21 labs, Israel
Idan Rozin is a full-stack developer at AI21 Labs with a focus on startups and over 7 years of experience. A React and Node enthusiast, Idan is deeply passionate about AI and technology, continuously exploring innovative solutions in the tech landscape.
Kevin Gao
Kevin Gao
Descope, USA
Kevin is an engineer who is passionate about solving problems and learning new skills. When he's not speaking to customers or coding through sprints, you'll find Kevin either on the road driving fast up a twisty mountain road, reading historical fiction books, or looking for a new place in the world to travel to and explore.
Shivani Poddar
Shivani Poddar
Facebook, USA
Shivani Poddar is a Machine Learning Tech Lead for the Meeting Assistant team at Workplace, Facebook, leading the development of meeting assistants for making remote collaboration easier for work. Previously, Shivani built and launched the foundational machine learning and AI stack for Facebook Portal, spearheading product and engineering development across social graph technology for ML, deep personalization for a smarter calling experience. She was also the first ever student at Carnegie Mellon to be funded by the Amazon Alexa Prize, where she and her team built a social chatbot, eventually deployed to tens of thousands of users through Alexa. During her time at CMU she also pursued research in the field of Natural Language Generation, Reinforcement Learning for chatbots and multimodal machine learning. Outside of Work, Shivani has emerged as one of the leaders in talking about Artificial Intelligence and Machine Learning for Consumers as well as Enterprises. She has been a speaker at numerous conferences over the last 2 years covering topics such as – Diversity and Bias in AI, Future of Work, Immersive Multimodal Assistants. She is also a mentor for young aspirants looking to become the next innovators in the field, and regularly volunteers in resume building workshops, panels for hiring and Q&As on LinkedIn.
Sachin Dangayach
Sachin Dangayach
Applied Materials, India
Sachin is a Deputy Director at Applied Materials leading efforts in Data Science and Advanced Analytics with a team of data scientists, working to provide innovative solutions with a focus on AI enablement in various products and systems for the semiconductor equipment manufacturing industry. He has over 15 years of diverse experience in the Industry around Software, Data Science and Artificial Intelligence.
Beril Sirmacek
Beril Sirmacek
Jonkoping University & the Owner of Create4D, Netherlands
Beril Sirmacek is a Dutch AI researcher. She received her PhD degree in Electrical and Electronics Engineering in 2009. Later she has worked with German Aerospace Center and pursued a habilitation degree with University of Osnabrueck. She is an assistant professor at Jonkoping AI Lab and also leading her company create4D. Beril is passionate to use computer vision and AI algorithms for creating useful healthcare and earth care solutions. Beril has taught a MSc course at the University of Augsburg in 2010, only on OpenCV. As a computer vision scientist and developer, she has been using it regularly for many years.
Karen Huaulme
Karen Huaulme
MongoDB, USA
As a Principal Developer Advocate at MongoDB, Karen Huaulmé (pronounced “You-Old-Maid” - but with no d’s) develops and presents applications to help developers unleash their creativity across all aspects of data and technology. Leveraging her past experience as a Solutions Architect for some of MongoDB’s most demanding customers, Karen loves to trigger that “aha” moment in the minds of developers - when they recognize a better path to simplify, enhance, and accelerate their projects in ways they never thought possible. Prior to MongoDB, Karen spent most of her career working with video game developers as a Solutions Architect and Integration Engineer at Nvidia, Amazon and Twitch. In her free time, Karen embarrasses her 2 kids, spoils her dog, and feeds her addiction to adventure travel - not necessarily in that order.
Elina Denisova
Elina Denisova
PhysicsX, UK
Elina builds web apps, untangles state logic, and occasionally wins battles against heavy data waves coming from the backend. She enjoys crafting complex UIs for unusual users, cares about good architecture and mental health, and firmly believes that “just one more refactor” is a valid personality trait.
Senna Parsa
Senna Parsa
GitHub, Netherlands
Senna is a Solutions Engineer at GitHub supporting our customers the EMEA MidMarket segment. She has a background in web application, iOS development, and accessibility. Originally working out of the HQ in San Francisco, she’s been working with GitHub customers for three years, passionate about empowering developers and helping organizations as they go through cultural and digital transformations.
Michael Hirschberg
Michael Hirschberg
Couchbase, Germany
Solutions engineer with a lot of operation experience in Couchbase.
Alex Astrum
Alex Astrum
Google, Canada
Alex Astrum is a passionate builder working in Developer Relations at Google’s Firebase, where he helps teams ship production-grade AI features with Genkit, Vertex AI, and Firebase Studio. He authored Firebase codelabs on Genkit and Gemini Extensions. He enjoys presenting live workshops and volunteering at hackathons. His current focus is around the transformational potential of AI in the app building space.
Jorrik Klijnsma
Jorrik Klijnsma
Ordina, Netherlands
Jorrik’s first lines of code were in the days jQuery ruled. That didn’t scare him. Now he has 6+ years of frontend experience using React and Vue during his day job. In the evening and night hours, a lot of fun projects and other libraries passed his ‘git clone’. When not coding he gets his fair share of laughs going to comedy shows.
Manoj Sureddi
Manoj Sureddi
Uber, USA
I'm a Staff Software Engineer at Uber with ten years of experience in software design and development. My expertise lies in building scalable systems, particularly in areas like Generative AI applications and config-driven automation.
Jaxon Repp
Jaxon Repp
HarperDB, USA
Jaxon has 25 years of experience architecting, designing, and developing enterprise software. He is the founder of three technology startups and has consulted with multiple Fortune 500 companies on IoT and Digital Transformation initiatives. A partially-reformed developer, he understands what it’s like to wrestle with technology instead of benefiting from it, and believes passionately that if the Jetsons never had an episode where a config file error brought down the food-o-matic, it surely should not be a problem now.
Keren Fanan
Keren Fanan
MyOp, Israel
Keren Fanan is the co-founder and CEO of Myop, a developer-first platform transforming how UI and UX are built, controlled and optimized in production. Keren has held key leadership positions at Moon Active and Gett and has a proven track record of success in scaling startups, launching strategic partnerships and driving profitability. At Gett, a global B2B transportation leader and unicorn, Keren served as Chief Revenue Officer and GM Enterprise. She was instrumental in scaling the company from its early stages to over $200 million in revenue, leading international SaaS strategy and overseeing marketing, sales, and business development. Following Gett, Keren joined Moon Active, a $5B gaming company, as VP of Product & Monetization. There, she led cross-functional teams, shaped product direction, and grew average daily revenue from $10K to $200K, contributing to over $1.5B in total revenue. Keren is a passionate advocate for women’s inclusion in tech and serves as a board member at Women in Tech (WIT). She also actively mentors and supports the next generation of female tech leaders.
Thomas Wiss
Thomas Wiss
Neo4j, Sweden
Thomas is a software engineer in the GraphQL team at Neo4j where he usually works with Javascript, Typescript, Cypher, and of course GraphQL. Prior to joining the GraphQL team, Thomas was part of the team who builds Neo4j’s graph visualization product, Bloom. Whenever he closes the laptop for the day he makes sure to get out in nature, do all kinds of sports and read a good book.
Jean Duthon
Jean Duthon
Babbel, Germany
Jean grew up in France, where he studied computer science and got his master’s degree from the Université de Technology de Compiègne, where he grew fond of web technologies. He moved to Berlin in 2016 and started working with vanilla JavaScript, jQuery, and Angular1 until he discovered React and thought, “Wow, this is how web apps should be built.” Those days he worked mainly with React at Babbel (the best learning language app! 😜)and loves creating enticing user experiences on the web, he has a soft spot for animations and delightful interactivity. In his free time, he loves to cook, make cocktails (ask for advice at your own risk), and play escape/board games.