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!
Keren Kenzi
Keren Kenzi
Senior Software Engineer, Israel
Keren is a senior software engineer with over a decade of experience in the industry. She holds an M.Sc. in Computer Science and is passionate about React and learning new technologies. Keren volunteers as a program manager at Baot, a community that supports women in R&D in their professional growth. She instructs and inspires developers to write blogs in her tech blogging workshops. Keren has experience as a dev community leader and a co-organizer of meetups and events. And in her not-so-spare time, she studies psychology. Her hobbies include drawing, photography, and singing.
Catalin Pit
Catalin Pit
Software developer building on the web with TypeScript, React, Node.js, and more. Writer, YouTuber, and lifelong learner who enjoys sharing knowledge with others
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.
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.
Patrick Akil
Patrick Akil
Xebia, Netherlands
Software Engineer at Xebia. Creator of the Beyond Coding Podcast (40k+ subscribers), conference speaker, and educator who's passionate about connecting people and making tech events awesome!
André Bauer
André Bauer
bettermarks, Germany
André is a seasoned developer with over 20 years of experience and is currently a Principal Engineer at bettermarks, a Berlin-based EdTech company. When AFK, he loves biking, watersports and woodworking.
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.
Leo Goldfarb
Leo Goldfarb
Albato, Portugal
With 15+ years in Digital Marketing and Tech, Leo has built and led numerous high-performing teams and streamlined key business operations. He spent 5+ years as COO at iProspect, a major performance marketing agency within the Dentsu group. Prior to that, he held roles as a marketing expert at Booking.com and as a business consultant for IBM, Microsoft, and Hewlett-Packard. Currently, at Albato, a no-code integration platform, Leo leads customer acquisition and business development efforts. Albato helps SaaS companies drive growth and enhance customer experience through native, embeddable API integrations.
Dora Makszy
Dora Makszy
Norway
Dora Makszy, an experienced product design lead, focuses on seamless product delivery through efficient collaboration with cross-functional teams, especially developers. With over 17 years of international experience in various roles (developer, business analyst, manager and mainly a designer), she has a comprehensive understanding of the entire process.
Andy Kuszyk
Andy Kuszyk
Typeform, UK
Andy Kuszyk is a Staff Engineer at Typeform, an occasional blog author, and an Emacs enthusiast! He's mostly worked in backend systems with the likes of Go, Terraform, and Kubernetes, but also enjoys thinking about the way teams work, communicate, and transfer knowledge.
Dara Olayebi
Dara Olayebi
Spotify, UK
Dara is a Software Engineer currently working at Spotify where she develops tools and services that provide internal teams with access to user account data. She began her career as a Frontend Engineer in the finance sector, and recently transitioned into full-stack development. With over 6 years of hands-on experience, Dara is particularly passionate about merging her creative and technical skills to design and build user-centric products that foster community. Outside of work, she loves to mentor other women who are at an early stage in their tech careers.
Mikhail Kuznetsov
Mikhail Kuznetsov
BGB Group, Portugal
Mikhail is a seasoned developer and tech leader with track record of working with both large companies across EU and small startups. Mikhail is passionate about new technologies and loves to share his knowledge with the world.
Andy O'Neil
Andy O'Neil
Weblytica, United States
My name is Andy O'Neil, and I help entrepreneurs add time-saving automation to their businesses through a process called co-building. This is a 1-on-1 process where I assist business owners in building automations over Zoom calls. Each session is personalized to meet the specific needs of the business owner and their business automation requirements. I have been creating no-code processes and automations since 2006, even before the term "no-code" was widely used. I have a passion for teaching entrepreneurs how to automate their businesses using Make.com, which is why I focus on co-building. My goal is to empower people to understand and control the automation processes in their businesses. I have been married for 21 years and have four beautiful children who keep my wife and me very busy.
Jonas Peeck
Jonas Peeck
uncloud, Germany
Founder at uncloud on a mission to simplify baremetal for software teams. Software dev at heart with a passion for distributed systems and making things run at scale ⬥ YouTuber ⬥ Dad of Ida 👶🏻 Caretaker of Frodo 🐶
Daniel Hervás
Daniel Hervás
Reckon Digital, Spain
Daniel is a software engineer with a background in first, local, and then international and VC-backed startups. He's now the lead engineer at Reckon Digital, where he directs and coordinates several projects with clients such as the UN's World Food Programme.
Adam Niederer
Adam Niederer
Chatham Financial, USA
Adam leads frontend development at Chatham Financial, where his efforts to centralize front-end resources and training have led to transformative improvements in product consistency and quality, accessibility of user experiences, and developer efficiency. In addition to the frontend, Adam especially enjoys working on projects involving performance, accessibility, and coding theory. Outside work, he spends his time learning human languages, writing open-source projects, and haunting his favorite sushi joint.
Olga Trofimova
Olga Trofimova
Splicky, Germany
As a QA Engineer and Enthusiast, Olga loves to use modern and practical approaches to improve product quality. She believes that AI will never replace human work, but could help to improve the quality of testing and reduce efforts for a manual one.
Zhou Fang
Zhou Fang
ByteDance, China
Developer of lynx-ui for the Lynx family of technologies. Cat enthusiast. Focused on building purr-fect components for Lynx.
Evan Purkhiser
Evan Purkhiser
Sentry, USA
I am a software engineer who is passionate about building high-quality systems, tools, and applications. I am continually striving for the feeling of having built something I’m proud of, something I know that I didn’t take shortcuts on, and something worth sharing. I also have a deep appreciation for modern design aesthetics and robust interaction design. The melding of form and function is my holy grail.
Frédéric Harper
Frédéric Harper
TinyMCE, Canada
Frédéric Harper is a seasoned Developer Advocate with over 20 years in tech, currently Senior Developer Relations Manager at Tiugo Technologies specializing in TinyMCE rich text editor. Fred has held developer advocacy roles at industry giants such as Microsoft, Mozilla, Fitbit, and npm. He's spoken at hundreds of events globally and authored a book on personal branding for developers at Apress.
Jupiter Hadley
Jupiter Hadley
Pocketgamer, UK
Jupiter is a prolific indie game journalist. She covers thousands of game jams and indiegames on her YouTube channel, letting every game have a moment in the spotlight. Jupiter is also the Adept Games Wizard at Armor Games where she finds free-to-play, browser-based games to bring on board to their web portal and has been working from home for all of her adult life.
 Dirk-Willem van Gulik
Dirk-Willem van Gulik
The Netherlands
Dirk-Willem van Gulik is one of the internet engineers behind the world wide web and of the founding fathers of the apache web server. He was the President of the Apache Software Foundation during its first 10 years. He has worked for the Joint Research Centre of the European Commission, the United Nations, telecommunications firms, several satellite & space agencies and founded several startups. He participated in different international standards bodies, such as the IETF and W3C on metadata, GIS, PKI, Security, Architecture and Internet standard since the early days. He build the initial engineering team at the very first ‘webserver’ startup: Covalent, helped make big-data and the semantic web reality at Asemantics and created the first first instant play P2P viewer at joost.com. He was the Chief Technical Architect at the BBC where he shaped the audience facing development-delivery platform Forge in the time for the 2020 Olympics and where he made information security and compliance a core enabler for business processes. He provides technical due diligence to investors and assists companies with their technology; taking an (interim) CTO role where needed. He currently works on several medical and privacy intensive security projects with a heavy emphasis on Architecture and Governance. During the Corona crisis he assisted the Ministry of Health of the Netherlands, the EU and the UN with the `CoronaMelder'; where opensource, cryptography and security-by-design helped build trust. And, more recently has spend waay to much time in Brussels on the Cyber Resilience Act (CRA) and the Product Liability Directive (PLD) as Europe brings in significant regulation of IT and Open Source. When not at work, he loves to sail or hang out with the lovely people at his local https://makerspaceLeiden.nl.
Evangelia Mitsopoulou
Evangelia Mitsopoulou
Tech Founder, Mentor @Philomath Academy, Thessaloniki, Greece
Mentorship available
Evangelia Mitsopoulou is a seasoned tech professional with nearly two decades of experience in software engineering, with a specialization in frontend development for the past 12+ years. She has a strong full-stack engineering foundation and a background in semantic web and linked data engineering, which informs her approach to building intelligent, structured systems. As the founder of her own academy, Evangelia blends her expertise in frontend software engineering with instructional design and cognitive load theory to create learning experiences that help engineers master complex concepts efficiently and retain knowledge effectively. Her career includes roles at prominent European organizations such as Elastic, ETH Zurich, Google, EF, and several fintech startups. Alongside running her academy, she advises startups as a fractional expert, helping them navigate technical challenges and scale successfully.
J. B. Rainsberger
J. B. Rainsberger
jbrains.ca, Canada
J. B. Rainsberger (@jbrains@mastodon.social) is a professional 5-pin bowler who enjoys consulting with software development professionals and the companies that employ them. He guides companies to better results from their software projects while he helps individuals work with less stress. He wants everyone to actually realize the promised benefits of Lightweight approaches to software development, which includes making sense of the "Agile" chaos of the past quarter-century. Companies engage him for remote working sessions, training courses, on-site workshops, and in-person consulting visits. Individuals, especially those stuck in companies that don't have the budget for formal consulting, can get the help they need by joining J. B.'s mentoring group by visiting https://experience.jbrains.ca. (Quite often, they can convince their employer to pay for that!) He lives in Atlantic Canada with his wife, Sarah, who is busy showing the Open Source world how to have quality documentation even with a mostly-volunteer project community. They travel to Europe less often than they used to, which makes each visit even more enjoyable.