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!
Rachel Kaufman
Rachel Kaufman
Attentive, USA
Rachel Kaufman is a full-stack software engineer working in the martech space. She loves writing unit tests (seriously), strongly-typed languages, and the Oxford comma. She’s also a lead organizer with Women and Gender eXpansive Coders DC, a group for women and nonbinary people in tech in the Washington, DC area.
Nancy Du
Nancy Du
Rangle.io, Canada
Nancy Du is an Associate Director of Digital Strategy at Rangle.io and an experienced web developer. She’s passionate about all things related to user experience on the web, with a particular focus on React, headless CMS, and UI architecture.
Eric Kontargyris
Eric Kontargyris
Braintrust, Germany
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.
Serhii Yakovenko
Serhii Yakovenko
Engineering Leader, UK
Engineering leader with 10+ years of experience in software development, QA, 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.
Abe Haskins
Abe Haskins
Shopify, USA
Abe is a Developer Advocate at Shopify focused on bringing the next generation of ecommerce to developers. Previously he spent 9 years working at Google on Firebase/Cloud where he focused on JavaScript/Typescript.
Karl Horky
Karl Horky
Founder @ upleveled.io, Netherlands
As technical founder at upleveled.io, I design and teach our full stack and AI programs, helping beginners and experienced engineers take the next step in their technical growth. With AI increasingly reshaping technical work, fundamental skills and comprehensive, well-rounded knowledge matter even more. In this context, I focus on designing broad and accessible curricula, mentoring learners at different stages and contributing widely to open source along the way.
Amit Hanoch
Amit Hanoch
monday.com, Israel
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.
Karthick Shanmugam
Karthick Shanmugam
Sixt SE, Germany
I’m Karthick working as a Senior Web Platform developer in Sixt. I spend my time building JavaScript platforms, refining workspace-driven architectures, and designing the infrastructure layers that tie everything together. From Nx/pnpm monorepos to multi-instance microfrontends, I focus on the patterns, boundaries, and shared capabilities that help application teams scale without friction. I love diving into how large JS systems behave in the real world and sharing practical lessons that simplify them.
Ben Brandt
Ben Brandt
Zed, Germany
Ben Brandt works at Zed, helping shape how engineers collaborate with AI and with each other. He is also a Lead Maintainer of the Agent Client Protocol, an open standard for interoperability between editors and coding agents.
Alem Tuzlak
Alem Tuzlak
Code Forge, Bosnia and Herzegovina
Alem Tuzlak is a software engineer and entrepreneur from Bosnia and Herzegovina, and the Founder of Code Forge. He builds open-source tooling and products in the TanStack ecosystem and React Router/Remix, and is known for creating developer-focused libraries and devtools that help teams build, debug, and ship faster. He is best known for his work on TanStack AI & TanStack Devtools. Alongside his engineering work, Alem teaches and shares practical insights through workshops, writing, YouTube and community work.
Sahar Brodbeker
Sahar Brodbeker
monday.com, Israel
A serial tools builder, I'm super passionate about creating a magical and seamless developer experience. Have been working on creating tools, infrastructure and systems for developers over the past 7 years, and going strong!
Marco Pierobon
Marco Pierobon
Thoughtworks Inc, Spain
Marco Pierobon is a seasoned Developer at Thoughtworks with well over a decade of experience in designing and implementing distributed applications. Specializing in cloud native technologies, he has led cross-functional teams in transitioning from project-based to product-oriented approaches. Marco has successfully orchestrated the migration of over 15 legacy systems to modern web-based platforms, significantly enhancing system scalability and performance. An active contributor to the tech community, he has presented at industry and tech conferences alike. Marco is passionate about driving innovation and efficiency in software development, aligning with the latest trends in cloud computing and AI integration.
Jeremias Menichelli
Jeremias Menichelli
Storyblok, Spain
Over a decade building seamless web experiences. Web accessibility advocate. Technical lead behind award-winning sites. Design system tinkerer. Community and event ambassador.
Allison Kunz
Allison Kunz
Hasura, USA
Allison is a solutions engineer at Hasura.
Mathilde Buenerd
Mathilde Buenerd
Shopify, Spain
I am a Frontend Developer at Shopify and a certified Web Accessibility Specialist. My expertise lies in creating complex user interfaces that are both user-friendly and compliant. At Shopify, I develop No Code tools, enabling all users to effortlessly customize their Online Store.
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).
Shivakant Shukla
Shivakant Shukla
Mphasis, India
Hello, my name is Shivakant Shukla, and I am a MERN stack developer with four years of experience in creating dynamic and user-friendly web applications. My passion for technology, coupled with a strong foundation in front-end development, has been the driving force behind my career. In the realm of Front-end development, I excel in crafting interactive and responsive user interfaces using technologies such as React, Redux, JavaScript, HTML5, and CSS3. I take pride in my ability to transform design concepts into functional, pixel-perfect websites that provide exceptional user experiences. Whether it's optimising performance, ensuring cross-browser compatibility, or enhancing accessibility, I am committed to delivering high-quality front-end solutions. While my primary expertise lies in front-end development, I have had the opportunity to work with back-end technologies like Node.js, Express.js, Nest.js, and MongoDB.
Interests:
Hadar Geva
Hadar Geva
Myop.dev, Thailand
Hadar is the co-founder and CTO of Myop, a developer-first platform transforming how UI and UX are built, controlled and optimized in production. Hadar brings over 15 years of hands-on development experience and a deep focus on frontend infrastructure. Over the past decade, he’s led engineering teams at some of Israel’s top tech companies. At Wix, Hadar served as an architect and then head of the frontend guild, managing over 700 developers and helping shape the company’s core frontend systems. Prior to that, he held senior R&D leadership roles at Jive Software and Rafael, driving large-scale frontend development across complex products. A Unit 8200 alum, Hadar brings not only technical depth but also a strong understanding of organizational scale, cross-team architecture, and how to evolve legacy systems. His experience spans both building systems from scratch and leading long-term frontend transformations in high-growth environments.
Casey Wylie
Casey Wylie
Defense Unicorns, USA
A charismatic Lead Software Engineer on Pepr at Defense Unicorns is an architect and engineer focused on cloud native and hybrid cloud environments focused on solving problems of scale, latency, reliability and secure software delivery. Lover of coffee and improving the open source community.
Jonas Herrmannsdörfer
Jonas Herrmannsdörfer
Vercel, Germany
Jonas spent years supporting startups as a React and Next.js freelancer. Now, he leverages his expertise as a Developer Success Engineer at Vercel to help customers succeed. When he's not programming, Jonas enjoys preparing the perfect espresso.
Simon Stern
Simon Stern
Apricot Studios, Canada
Simon is a full-stack developer and React Native specialist with a keen interest in experimenting with bleeding edge software, building cool products, and sharing knowledge. Over the years he’s had a diverse set of experiences ranging from mobile apps, full-stack development, web3, AI & LLM’s. His clients have won awards in the healthcare space, been featured at the Cannes Film Festival, and were a partner in the Dubai 2020 Expo. Recently Simon has been exploring the frontier of the future as a member of the Network School in Forest City, Malaysia.
Yael Balla
Yael Balla
Fijoya, Israel
VP R&D @ Fijoya. An experienced manager and engineer, with more than two decades of experience in the world of development, from enterprise companies to early stage startups
Artemis Leonardou
Artemis Leonardou
Kanoparty, Greece
I’ve been building digital products since I was 14, driven by a deep curiosity to turn ideas into tools that solve real problems. One of my first personal projects was an AI tutor I built to prepare for Greece’s national exams. Using it daily helped me score in the top 0.1% nationwide without external instruction. I documented the journey in a YouTube video that’s now been viewed over 50,000 times. Over the past few years, I’ve contributed to open-source projects, shipped production-ready tools for startups, and participated in 10+ hackathons where I built functional apps in just days, earning several first-place finishes. I thrive in fast-paced, problem-solving environments and love creating technology that moves quickly from prototype to real-world use.