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!

Bob van Luijt
Weaviate, Netherlands
Bob is CEO and co-founder of SeMI Technologies, the business created around the open-source vector search engine Weaviate. Besides SeMI and Weaviate. Bob is a frequent speaker on the topics of open source, digital technology, software business, and creativity. He has spoken at around 100 events on the aforementioned topics in Europe, the US, and Russia.

Rebecca Friedman
Shopify, Canada
I am a strong full stack developer, and a Ruby on Rails enthusiast. I'm passionate about formalized SDL processes, and clean, well-tested code. Having worked on the monolith that is the Words With Friends backend service at Zynga, I've architected, developed and deployed features that have been used by millions of concurrent users. I'm a huge supporter of University of Toronto, and an Arbor Award recipient. I guest lecture when I can, mentor students through the Alumni Mentorship program, and volunteer at numerous interview prep workshops, panels, and networking events for students.
Nick Teets
StackHawk, USA
Nick Teets is a software developer and musician based in Denver. Nick found his passion for connecting people using technology after spending summers in the Sandhills of Nebraska establishing a multimedia journalism nonprofit. Through an interactive website, the project told the stories of the communities of the area with audio, video, photos, and text. This early foray in journalism taught him about the intersection of empathy, technology, and storytelling, and would lead him to a career in frontend software development, creating beautiful and accessible user experiences to connect people across the world.

Roy Tal
Firefly, Israel
Roy Tal is a cloud and DevOps enthusiast who loves to build tool that will make infrastructure operations better for everyone. Today he is a team leader and founding team member at Firefly who are helping solve infrastructure drift in large-scale cloud operations. Before that he served as a backend developer at Dome9, building better security practices into cloud operations, that has been acquired by Check Point.

James Swinton-Bland
AG Grid, UK
James Swinton-Bland is DevRel Lead at AG Grid. He started out his career as a software engineer, before moving into Developer Advocacy. With a background in Android and Java, James now works primarily with React, helping developers get the most out of AG Grid and AG Charts.

Andrew Murphy
Tech Leaders Launchpad, Melbourne, Australia
Andrew Murphy started his career as a Software Engineer but, after a decade in technology leadership, he decided to focus on teaching the skills that he learnt the hard way. When he moved into leadership there was no support, so he had to make all the mistakes (a lot of them!) and learn from them.
His goal is now to make sure that tech leaders don’t have to do things the hard way by providing them with the mindsets and skillsets that can make them happy, confident and effective leaders.
His company, Tech Leaders Launchpad, currently focuses specifically on the new and emerging leader space, as that's the place we can have the biggest impact on the students, and the industry.

Bar Hofesh
NeuraLegion, Israel
Co-Founder, CTO & Security Researcher at NeuraLegion. Developer and security researcher, I love playing with Neural networks and other ML tools.
I'm interested in new programming languages and the potential they bring.

Gavin Ray
Hasura, USA
Full Stack Web Developer with expertise in all aspects of the web development life cycle, including requirements analysis, design, development and production support. Primary strengths are Node & Javascript (ES6, React, Vue), React Native, Ruby on Rails, Amazon Web Services/Heroku, and SQL + NoSQL Database Management.

Paul Everitt
JetBrains, USA
Paul is the PyCharm/WebStorm Developer Advocate at JetBrains. Before that, Paul was a co-founder of Zope Corporation, taking the first open-source applications.

Lean Vilas
Team Lead @ Appinio, Germany, Hamburg
Lean Vilas is a Senior Software Engineer, Team Lead, and mentor with over a decade of experience helping developers grow into confident, high-impact contributors. Known for blending technical expertise with a deep focus on people, he teaches software engineers how to navigate career transitions, especially the leap from individual contributor to engineering manager. Through his newsletter From IC to EM and conference talks, he shares practical, human-centered leadership insights that resonate with devs who want to lead without losing themselves.

Leandro Fernandez
Meta, UK
Leandro Fernandez is an Engineering Manager at Meta, London, with 16 years of experience as an engineer/manager in big tech, like Meta, Uber and Dell Technologies.
He has a successful track record of supporting high performing teams of software and machine learning engineers. Some of the cool projects that he launched in the past include Uber's Audio Recording and Record My Ride, and Meta's automated data removal infrastructure.

Philip Fulcher
Nx, USA
Philip Fulcher is a senior engineer with at Nx. He works with Fortune 500 clients to modernize their development practices with a monorepo approach. Philip lives in Colorado with his wife (who is much smarter than him) and two great kids.

Jozef Sakáloš
Bryntum, Slovakia
Saki is a seasoned software developer with decades of experience, specializing in JavaScript and modern web technologies. He has led the development of numerous web applications across various industries, blending deep technical knowledge with hands-on problem-solving. As a consultant and trainer, he supports teams in building scalable, high-quality solutions. His passion is sharing knowledge and promoting clean, maintainable code.

Luke Ehresman
Gazelle, USA
Luke is the co-founder of Gazelle, an all-in-one business automation solution for piano technicians. He founded and bootstrapped the company in 2015, helping piano technicians around the world grow their businesses. Gazelle has customers in over 30 countries and is translated into 11 languages.

Juliette MacPhail
mabl, USA
Juliette MacPhail is a Product Manager at mabl, where she spends her time working on a low-code platform for simplifying test automation and helping teams ship high-quality software. She’s passionate about understanding core challenges in the test automation space and enabling the transition to quality engineering. As an active member of mabl’s DEI committee, she spends her spare time on initiatives related to accessibility, inclusivity, and mental health in the workplace.

Pratyusha Singaraju
Netflix, USA
Pratyusha Singaraju is a Senior Software Engineer at Netflix Inc., where she architects and builds sophisticated backend services that power the content understanding infrastructure behind Netflix's search, collections, and ratings systems. Her work directly impacts how millions of users discover and engage with content across the platform. Prior to Netflix, Pratyusha was part of Microsoft's data team for Bing, where she worked on knowledge graph initiatives spanning diverse public domains, including food, nutrition, politics, events, and building an enterprise knowledge graph.

Jenn Creighton
Netflix, USA
Jenn Creighton is a senior software engineer at Netflix. She hosts Single Threaded Podcast. Organizer of Women of React 2020 conference & useReact.NYC meetup.
Jenn lives in New York with her two cats and maintains a Home for Abandoned Succulents, Mismanaged Plants and Otherwise Ailing Flora.
You can find her online - [@gurlcode](https://twitter.com/gurlcode).

Simon Zhong
Sentry, USA
Simon Zhong is a Sales Engineer at Sentry with almost 10 years of experience in enterprise software. He attended the University of Edinburgh and is a graduate of University of California, Davis in Computer Science. He is an American born Chinese (ABC) who is a native English speaker with conversational proficiency in Cantonese.

Julia Wallin
Director of Engineering, The Netherlands
Julia Wallin is a passionate Software Engineering Manager focused on building and scaling high-performing engineering teams that both build and use AI to build.
With more than a decade of industry experience, she leads cross-functional teams to deliver reliable, production-grade platforms and large-scale products and services.
A sought-after speaker, Julia presents on the intersection of AI and software engineering, sharing practical strategies for team structure, developer productivity, and engineering culture. Her clear, energetic delivery leaves audiences with actionable insights for improving technical processes, scaling teams, and accelerating delivery.

Neil Manvar
Sentry, USA
Neil Manvar is an engineer dedicated to helping developers ship quality code quickly. In his free time, you can find him cycling, snowboarding, or cuddling with his dog. He currently works as a Solutions Engineering Manager at Sentry, an Application Monitoring software company that helps software teams discover, triage, and optimize the performance of their code.

Konrad Bujak
CEE AI Hub, Poland
Generative AI Engineer and Product Manager, working in IT for the past 13 years. MSc. in AI Engineering. Founder of CEE AI Hub, AI venture building and local communities booster. I worked in corporates (Microsoft, Cisco) and startups (edrone, kontakt.io), finished my full-time working as a Product Director. I am helping companies implementing Generative AI features / products and building product (engineering) teams. IoT and homelab enthusiast. I own a vineyard

Tom Papiernik
Buddy, Poland
As a developer advocate and technical writer at Buddy, Tom takes his love for communication and passion for technology and uses them to break down complex ideas into bites that everyone can swallow. Having worked directly on open-source projects, he is equally passionate about the front and the back-end - be it React, Go, or Kubernetes. In his spare time, he's a guitar-wielding amateur musician who dreams of recording a platinum album.

