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!

Sulagna Ghosh
StockEdge, India
I'm Sulagna Ghosh, a JavaScript engineer who loves working with React, performance optimization, web accessibility, and authentication. I enjoy solving tricky problems and fine-tuning rendering workflows to make web experiences as smooth as my morning coffee.
When I'm not coding, you'll find me sharing insights through tech talks, lively discussions, and blogs. I'm always learning—whether it's a new programming language or the secret to the perfect masala chai. Always up for a good brainstorming session, especially if it involves code and caffeine.

Eugene Fidelin
eBay, Engineering manager, Netherlands
Engineering Manager & Frontend SME @ eBay, ex Frontend Architect @ Marktplaats. Experienced Full-stack Web Developer with 20+ years in the field. Enjoy helping teams to build well-tested, high-performing, and secure software using Javascript, Node.js, React and Marko.js.

Chloe Caron
Theodo UK, UK
Chloé is a Tech Lead, Data Engineer and Full-stack Developer at Theodo UK. Having worked on several projects, Chloé has continuously expanded her experience by working with both startups and well-established companies. With a keen curiosity for exploration, Chloé frequently embarks on exploratory journeys into innovative data topics, journeys that she often shares through Twitter.

Adina Stoica
Bloomberg, USA
Adina Stoica is a full-stack software engineer at Bloomberg, where she works primarily on front-end items, both Bloomberg-specific and web. Originally from Romania, Adina moved to the United States for college. She obtained her bachelor’s degree in computer science from Bard College and her master’s degree from Washington University in St. Louis, where she specialized in computer vision. Prior to joining Bloomberg, Adina worked at Cerner Corporation (now Oracle Health). Adina is quite passionate about front-end development and improving user experience, and she tries her best to infuse this passion into her development work.

Karol Kozer
intive, Poland
A graduate of the Polish-Japanese Academy of Information Technology. He is currently working as a Senior Software Engineer. He has been working in the industry for several years, developing large commercial projects and developing solutions for key clients. Front-end is his hobby and passion.

Elliott Johnson
Vercel, SvelteKit Maintainer, USA
Elliott lives in the beautiful city of Denver, Colorado, where he spends his free time doing Dangerous Outdoor Activities. During the day, he works as a Growth Engineer at Vercel, and, when he can, he helps maintain the world's best web framework, SvelteKit.

Mark Robustelli
FusionAuth, USA
Mark Robustelli is an accomplished software engineer and technology leader with over 25 years of experience in architecting and implementing innovative solutions for a wide range of clients. Most recently, he has found a perfect fit that allows him to combine his love of technology with his passion for helping people as a Developer Relations Engineer at FusionAuth.

Renaldi Gondosubroto
SEEK, Australia
Mentorship available
Renaldi Gondosubroto is a Software Developer from Seek Limited, where he works on the backend of the home page which is accessed by all jobseekers who search for jobs on the site as well as the infrastructure which powers it. Previously he has worked as a .NET software developer for automobile companies and has been active within the research community; putting a lot of his research focus within IoT and virtual reality. Through his passion of developing software and contributing to the opensource community, Renaldi wants to encourage the innovation of new solutions to usher forward and promote a new era of innovations that can be used by everyone. Having spoken at 20+ events and conferences, he has also been active on the open source community for the past five years, building solutions on the cloud and sharing his experiences and projects.

Andrzej Fricze
The HEINEKEN Company, Poland
Experienced programmer and eloquent speaker. Andrzej has been at the forefront of the tech community, orchestrating countless meetups and conferences. With a passion for nurturing the next generation of tech enthusiasts, he's proudly mentored at both JavaScript and Clojure workshops. Beyond the realm of code, he's a dedicated musician and a fitness enthusiast who enjoys lifting. In his downtime, he's honing his vocal talents and always brainstorming innovative business ideas.

Violina Popova
ClipMyHorse.TV, Bulgaria
With a passion for creating seamless cross-platform experiences, my journey in tech started not with programming, but as a consultant in the tech industry. The desire to build and innovate led to a shift in focus towards software development, particularly mobile app development, where the thrill of solving complex problems and crafting user-friendly applications became a calling.
Co-founding Frontend Queens was a natural extension of this journey, inspired by a commitment to inclusivity in tech. This community was born from the belief that everyone, especially women, should have the opportunity to thrive in technology. By fostering a supportive environment, we aim to empower women to break barriers and pursue fulfilling careers in this ever-evolving field.

Jan Peer Stöcklmair
Dynatrace Austria GmbH, Austria
I’m a software engineer working at Dynatrace and Pebblebyte, where I focus on frontend, DevOps, and making sure observability is everywhere. When I’m not deep in code, you’ll probably find me kitesurfing, road biking, swimming, or hanging off a rock wall. Whether I’m debugging or chasing wind, I’m always looking for that perfect flow.

Brendon Co
Standard Chartered Bank, Singapore
Originally from Singapore. Brendon is an expert UI expert at Standard Chartered and published multiple books in amazon and leanpub. In his free time, he writes about Model Context Protocol server for PostgreSQL, Remix starterkit, Micro Frontend book and sell UI components.

Kristiyan Velkov
Jakala, Bulgaria
Mentorship available
Tech Lead • Front-End Advocate • Mentor & Educator • Tech Blogger • Published Author • 100+ IT Certifications • 30K+ Followers • Docker Captain • Expert in React.js, Next.js, Angular, DevOps, Web Accessibility & Security
Kristiyan Velkov is a seasoned software developer and technical leader with more than 10 + years of expertise in JavaScript and open-source development. His comprehensive skill set includes: JavaScript, TypeScript, React.js, Angular, Vue.js, Next.js,DevOps,Web accessibility,Security and DevOps.
A lifelong learner, Kristiyan has earned over 100 IT certifications.
With experience at some of the world’s leading IT organizations, Kristiyan thrives as a technical lead, driving innovative projects and mentoring teams to achieve growth and excellence. His thought leadership has garnered a significant following:
- 30,000 LinkedIn connections
- 7,000 Medium subscribers
- 100,000+ monthly readers
- 3 IT books.

Samuel Esogbue
Apex Motive, Nigeria
Samuel is a Generative AI Engineer with a strong desire to solve problems.
He constantly works on developing new and creative AI solutions that push people's life & businesses forward.
Motivated by his keen interests in technology and psychology, along with his dedication to doing excellent work, Samuel focuses on building AI solutions that improves people's lives by directly addressing economic issues.
Being efficient and productive is extremely important to him, driving his goal to create powerful, leading AI solutions that bring about positive change.

Austin Fahsl
Nx, USA
Austin Fahsl is a senior engineer at Nx and a core maintainer of Lerna. With a background in enterprise web application development, his passion for building things is driven by a fascination for human psychology. Austin lives in Colorado and enjoys board games, craft beer, and live music.

Darrell Warde
Neo4j, UK
Darrell is a senior software engineer and the GraphQL team lead at Neo4j, where he primarily works with TypeScript and of course, GraphQL! After many years of building GraphQL services, he has brought his passion for the technology to the company to build a library which will enable users to quickly get up and running with GraphQL and Neo4j. Darrell joined Neo4j at the start of 2021 following 7 years working in the public sector, which started with an apprenticeship where he learnt how to develop software. Darrell enjoys staying active by going to the gym and cycling, and plays Brazilian samba drums!

Karol Przystalski
Codete & Medtransfer, Poland
Obtained a PhD degree in Computer Science in 2015 at the Jagiellonian University in Cracow. CTO and founder of Codete. Leading and mentoring teams at Codete. Working with Fortune 500 companies on data science projects. Built a research lab for machine learning methods and big data solutions at Codete. Gives speeches and trainings in data science with a focus on applied machine learning in German, Polish, and English. Used to be an O’Reilly trainer.