JavaScript experts, mentors, speakers

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.

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.

I’ve been building digital products since I was 14, driven by a deep curiosity to turn ideas into tools that solve real problems. One of my first personal projects was an AI tutor I built to prepare for Greece’s national exams. Using it daily helped me score in the top 0.1% nationwide without external instruction. I documented the journey in a YouTube video that’s now been viewed over 50,000 times. Over the past few years, I’ve contributed to open-source projects, shipped production-ready tools for startups, and participated in 10+ hackathons where I built functional apps in just days, earning several first-place finishes. I thrive in fast-paced, problem-solving environments and love creating technology that moves quickly from prototype to real-world use.

Software developer building on the web with TypeScript, React, Node.js, and more. Writer, YouTuber, and lifelong learner who enjoys sharing knowledge with others

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.

Amit Mandelbaum is a tech lead at AI21 labs, prior to joining AI21 labs Amit was an entrepreneur in the field of GenAI and a Director of AI at Nvidia. Amit is also an Angel investor in the field of AI and is a known keynote speaker and consultant on GenAI agents.

My name is Zoe Steinkamp and I am a Developer Advocate for influxData. I was a front end software engineer for over 6 years before I moved into a developer advocate role. I have been with InfluxDB for over 3 years and i look forward to sharing my knowledge of the platform and databases. I enjoy learning about awesome new technologies and doing at home tech projects to help make my life as well as other peoples lives easier. My passions besides new technology include traveling and gardening.

Zach is a builder for the web. He created Eleventy (11ty), an award-winning open source site generator now full-time sponsored by Netlify. At one point he became entirely too fixated on web fonts. He has given 62 talks in eight different countries at events like Jamstack Conf, Beyond Tellerrand, Smashing Conference, CSSConf, and The White House. Formerly part of Filament Group, NEJS CONF, and NebraskaJS.

Engineering Manager in UI Engineering at JP Morgan, Steve works with the core engineering teams creating open source developer tooling and an accessible React component library aimed at streamlining the life of development teams across the bank. Steve has working in JavaScript development focused roles since 2001 from ad agencies to fintech and IE6 through to evergreen Chrome, he is the author of several widely used open source libraries and describes his career as having been lucky enough to follow his hobby and his passion every day for over two decades.

Melanie loves being a software engineer. The infinite loop of bugs, puzzles and learning make of everyday a new adventure. Her specialty and the love of her life is Vue.js, but lately she has been adding Nuxt.js and Node.js to the party. When she is not working as a software engineer at Capgemini, she uses her web development skills to remove micro plastic in the waters of the world. Her goal in this life is to work towards a more sustainable way of life, meaning that her hobbies include sailing the world, documenting underwater micro-life, and picking up trash with podcasts blasting. She is always trying on many different hats: trainer, team lead, community builder, talker, organizer. But the hat that fits best is developer.

Jarred is a Technical Lead at ADB Safegate, where he leads the development of the Intelligent Apron suite of products, which are aimed to increase the performance and safety of airport operations, while lowering the environmental effect aviation has on the world. Originally from the US, he is now based in Malmö Sweden where he serves as a mentor to multiple teams across Europe, and is passionate about solving complex problems while teaching others along the way.

Principal Engineer and active open source contributor. From Minsk, but now based in London and work at DAZN. I like playing around with TS, React, Redux, MobX/MST, RxJS, WebGL, Serverless, Node, Functional Programming with a focus on performance, system architecture and team productivity.

Chief Technology Officer at The Agency, where he focuses on the larger technology and product strategy, software architecture and development.

Weslley Araújo is a MySQL2 maintainer and the creator of Poku. He builds and maintains widely adopted supply-chain dependencies in the JavaScript open-source ecosystem. Recognized as a Microsoft MVP, he focuses on developing for developers, sharing knowledge, speaking at events, and inspiring others.

I'm a seasoned Product Manager with over five years of experience in a leading digital media company, where I have overseen the development and scaling of multiple high-traffic news platforms built on React. With an engineering background from a prestigious government college in Delhi, I bridge the gap between technical innovation and business strategy. Their expertise spans real-time user management, subscription lifecycle optimization, and cross-functional team leadership. I'm passionate about sharing actionable insights on building robust, scalable, and user-centric React applications that thrive in fast-paced, high-demand environments.

I am a Software Engineer at Figma, hailing from Leeds in the UK. I have always worked full stack but there is a special place in my heart for anything visual, which has lead me to my role on the Developer Tools team at Figma. What excites me about technology is being able to rapidly iterate on things and work with the smartest people around to build cool stuff! In my spare time I enjoy hanging out with my cat, oil painting and getting out into the countryside on my own two feet.

Shyam Swaroop is the maintainer and core developer of an open-source project, Atri engine - a new framework built on React. He is also the Co-Founder & CTO of Atri Labs - the company behind this project. He has worked as a software engineer in both academia and industry. His most recent engagement in academia was working with DARPA under the US Department of Defense as Graduate Research Assistant at Columbia University (USA). Previously, he has created software products that have yielded multi million dollars of revenue for his organization, EXL Services, a US-headquartered technology consulting firm. He studied Engineering from IIT, India and dropped out from graduate program in computer science at Columbia University, USA to work on his startup full-time.

Katarzyna is the Co-founder and CEO of ec0lint - a tool for frontend developers that mitigates the carbon footprint of websites. On top of that, she works as a Project Manager in the nanotechnology company Nanores. Her focus lies on diamonds and vacuum sensors. Katarzyna enjoys cooking Asian food and visiting art exhibitions in her free time.

Blazej Abel - Entrepreneur, founder, and CEO of Landingi, one of the leading landing page platforms. An engineer by education. He bounded with the Internet industry for 20 years, when he started an interactive agency and spent most of his career close to website creation. Speaker at numerous conferences and a trainer. Husband, father, football player, cyclist and LEGO fan since 1982 :)

Eevis is a software developer and accessibility specialist based in Finland. She loves sharing information about topics like accessibility, React and GraphQL, and is active in different communities aiming to increase equality in the tech field in Finland. When not coding, she explores the world around her with a kayak.

Nonso is a developer, writer, and tinkerer that enjoys pushing the boundaries of web development. He has a passion for creating software that empowers others to bring their ideas to life. Currently, he is a senior software developer at Konrad Group, where he actively builds solutions for various clients in the digital space. When he's not at his desk developing, you can find him rocking climbing, jumping out of airplanes, and seeing what new photography gear he can get his hands on!

Matt Seccafien In the 20 years since studying in my homeland of Canada, I've held a variety of professional roles, starting out in traditional print, typography and information design, to site resiliency engineering, to open-source React framework development, and I'm currently interested in design system operations. I value creativity and autonomy in both life and work, and thrive when I am invested in the whole idea rather than any single facet. When not at my computer I can be found running around Tempelhofer Feld in Berlin, at the kino or hanging out with my partner Fiona and our cat Otto. Simon Lenz Hi, I’m Simon, a developer from Kaiserslautern, Germany. I work at DeepL on breaking down language barriers. Accessibility is a particular interest of mine, because we should bring everyone along in that process. I like hiking in the beautiful Pfälzerwald and, these days, also enjoy playing the flute, editing the magazine of a historical board game society, and strolling across Tamriel as my Khajiit.

Develop professionally for 14 years. Worked as a team lead at Deloitte and Nielsen. Currently I lead my own tech company Tourmaline Core. I am passionate about people self-development culture at tech. I am a PhD.

Hailing from Vancouver, Canada, now living in Holland, Jacob is an avid API designer. He is a core collaborator of Node.js (loaders/modules, test runner, and userland migrations teams), TC39 and WinterTC / TC55 delegate, and author of several npm packages. Outside of engineering, he's known for cats, wine, and brunch.