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!

Chris Stavitsky
Sentry, USA
Chris has a background as a web developer. He previously worked as a Senior Software Engineer at a company that used Sentry for error monitoring. Chris liked the product so much that he decided to come work for Sentry and make finding and fixing bugs easier for other developers.

Rob Sutter
Fauna, USA
I have woven application development into my entire career, from time in the U.S. Army and U.S. Government to stints with the Big Four, the world's largest cloud services provider, and smaller startups. I have started my own company – twice – once providing consulting services and most recently with WorkFone, a software as a service startup that provided virtual digital identities to government clients. I love to build in public with Go and all things serverless!

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.

Dave Glencross
Capital on Tap, UK
Engineering Manager at Capital on Tap (UK fintech), leading Internal & Core Systems and the Engineering department’s AI adoption. Focused on moving AI from prototype to production with stage-gates, data-protection controls, and measurable impact. Integrating an AI function inside Engineering to ship customer-facing features.

Gokul Chandrasekaran
HIVED, UK
Gokul is a software engineer and former startup cofounder with 10 years of experience building products across fintech, martech, consumer research, telecom, and logistics. He’s passionate about solving complex problems with simple, elegant solutions and mentoring aspiring engineers through programs at General Assembly and AcademyXI.

Robert Hostlowsky
Instana, Germany
Currently, Robert Hostlowsky is working as a developer, coach and systems engineer.
He published an online video course about developing a full-stack GraphQL application online-course.
He loves DevOps culture on modern cloud infrastructure, uses the latest state-of-the-art web technologies, and loves how it plays nicely together at minimum effort and cost.
He loves web technologies. Feeling being a part of the developer community he is co-organizing the JSCraftcamp, Munich.

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.

Tim Makin
CDL, UK
Tim Makin is a Software Engineering Manager at CDL with over 20 years of experience in driving innovation and delivering high-impact digital products. They currently lead 14 teams, guiding projects from conception to completion while fostering a culture of excellence. Before their current role, Tim spent six of those years as the founder of a digital agency, developing solutions for world-renowned organisations including the BBC, Tesco, IKEA, and Sage.

Harsh Maheshwari
Super{set}, USA, Boston
Mentorship available
I’m Harsh Maheshwari, a Principal Engineer at Optum, UnitedHealth Group. I hold a Master’s in Computer Science and specialize in applied search technology, focusing on Full Stack AI/ML application. I’ve filed patents in this area and have previously created similar solutions for the fintech industry. My work revolves around advancing search methodologies and pioneering innovative frontend development.

Connell Gauld
Zappar, UK
As CTO and Co-Founder, Connell oversees Zapworks (Zappar’s AR, VR & WebXR platform) as well as being responsible for all cloud infrastructure. Connell founded Zappar in 2011, alongside Dr. Simon Taylor, Caspar Thykier and Kirk Ewing and is one of the world's leading XR Platforms and creative studios. More recently, Connell and the team launched Zapvision, an app and SDK that's helping people who are blind or have low vision to access product information on packaging through a single Accessible QR code.

Sebastian Witalec
Weaviate, Denmark
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).

Rodrigo Donini
Toptal, Spain
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.

George Kouzmov
BlackRock, UK
George is a TechLead @ BlackRock with 12+ years of experience in the FinTech industry. He has architected, designed and build various systems, from data warehouses to large MFEs.
He lives and breathes in the full stack space between Data and UX. Proven ability to architect, design, and implement complex solutions while fostering high-performing engineering cultures.







