JavaScript experts, mentors, speakers

After working as a science teacher for a few years, Sylvana transitioned into software engineering as a means to provide a quality education to all learners. She began her career as an apprentice at Codecademy and is now a software engineer at the company. During her time at Codecademy, she has gained experience with React, Next.js, and Typescript and has led initiatives like the tech reading club and dev workshops.

Jordan is the frontend technical lead at Mysten Labs. He is passionate about Taco Bell and TypeScript.

Frontend Engineer working at Docplanner. Passionate about Web technologies, JavaScript and Vue.js. Founder of Escuela Vue (http://www.escuelavue.es/). Voracious reader of ancient history and philosophy (Stoicism).

Backend Software Engineer for +10 years in industries such as telco, online betting, and financing, embraced the passion for leading and caring for people 3 years ago, being now at OLX Group as Engineering Manager.

Sarah Rainsberger leads a large open-source software documentation project with several maintainers and over 1000 community contributors. She brings a background in high school mathematics education, academic counseling, and curriculum development to her current technical writing and open source community building. She lives in Atlantic Canada with her husband J. B. (Joe). In her spare time, she photographs birds.

Game developer with a healthy curiosity for the web. Worked at Wooga for a few years, then freelanced in several game studios. Now in charge of making tech work at PlayPack here in Berlin.

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.

John joined React Flow in 2022 and takes care of the documentation, communication and community.

Gabriel is a Node.js core collaborator, TSC member emeritus, and a member of the Node API working group with a passion for improving performance. Formerly of Nokia, Intel, and SpaceX, currently at Auction.com.

Jen Person is a developer advocate for Squid Cloud, an enterprise-grade backend-as-a-service that connects to and secures any API or data source. With nearly a decade of experience in developer products, Jen has extensive experience connecting with developers through talks, blogs, events, social media, and videos. She is passionate about creating the best development experiences so devs can focus on creating the best applications.

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.

Goran is the CTO and Co-founder of syntheticAIdata, a startup company dedicated to democratising the vision AI market by providing affordable and accessible synthetic data. With over 20 years of work experience in IT and a deep understanding of various technologies, Goran worked as an engineering and technical manager, among other roles, developing IT strategies and solutions for well-known clients. Goran is a tech enthusiast, he writes technical blog posts and he likes to share his knowledge at conferences, workshops, and meetups. He is recognised as Microsoft AI Most Valuable Professional (AI MVP), and his projects have been highlighted on websites such as Forbes, The Next Web, NVIDIA Developer, TechCrunch, and others.

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.

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 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.

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.

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.

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.

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.

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.

Developer of lynx-ui for the Lynx family of technologies. Cat enthusiast. Focused on building purr-fect components for Lynx.

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.

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 (@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.