JavaScript experts, mentors, speakers

Angel started his career as an US Air Force Space Systems Operations specialist in Cape Canaveral AF Station where he realized his passion for technology and software development. He has extensive experience in the private, public and military sectors and his technical experience includes military/space lift operations, technical writing, software development, SRE/DevOPs engineering. He also has a wealth of experience in defense and federal sectors such as contracting, information systems security and management. You can usually find him speaking at or organizing local tech meetups and hackathons where he enjoys engaging with developers.

As Vultr's Developer Advocate, Walt Ribeiro helps create educational materials for developers and technologists including video/written how-to guides, product demos, reference materials, best practices, code samples, and training. Having been a broadcast engineer at Youtube Space LA, he understands online content and production and is excited to bring that energy to Vultr's growing community across all sites, meetups, and events.

Vishnu is a builder, speaker, and problem-solver passionate about crafting scalable systems and meaningful digital experiences. He has helped startups grow from India's startup corridors to Silicon Valley, building the kind of web platforms that move fast without breaking purpose. Deeply rooted in the React ecosystem, he champions clean architecture, great UX, and the power of simplicity in modern software.

Experienced Business Development Specialist with a demonstrated history of working in the information technology and services industry. Skilled in Sales, Customer Relationship Management (CRM), Event Management, Management, and Account Management. Strong business development professional with a Finance focused in Economics and African American History from the University of Illinois at Urbana-Champaign.

Full Stack Developer at Shell, experienced in building SASS stacks, scalable and optimized cloud services.

Brian Love is a software engineer, Google Developer Expert, and co-founder at Polaris, where he is building developer tools for a more performant and reliable internet. He enjoys learning, speaking, and writing about software and technology. Brian co-authored "Why Angular for the Enterprise" for O'Reilly. When not coding, Brian enjoys skiing, hiking, and being in the outdoors.

Sawyer Bowerman is an AI Engineer and Developer Advocate on Red Hat’s AI team based in Boston, MA. He specializes in high-performance model serving and inference, focusing on scaling open-source ecosystems like vLLM and llm-d to make large language models more efficient and accessible for developers. He is dedicated to bridging the gap between raw model performance and real-world developer productivity through open-source innovation.

Raju Dandigam is an Engineering Manager and Staff Engineer with over 15 years of experience in web and frontend engineering, scalable application architecture, and AI-powered product development. He currently works at Navan, where he leads and builds large-scale web platforms used by millions of users. Raju is an active conference speaker, published technical author, and community contributor. He has spoken at international JavaScript and testing conferences, serves as a judge for global hackathons and industry awards, reviews technical books and papers, and mentors developers worldwide. He is also recognized as a Docker Captain and a Cypress Ambassador, reflecting his contributions to the developer and testing ecosystem. His interests include modern web architectures, frontend scalability, testing strategies, and practical applications of AI in software engineering.

Joe Hart is a software engineer, international speaker, and occasional stand-up comedian (mostly at JavaScript conferences, but still). He builds joyful interfaces with React by day, and questionable side projects by night. Joe brings a mix of deep technical insight and sharp humour to the stage – because if you can’t laugh about state management, what’s the point?

Hi there! I'm a developer and a trail runner, and I enjoy both coding and hitting the trails. When I'm not busy turning lines of code into beautiful and functional applications, you can find me running through the mountains and breathing in the fresh air. I'm a firm believer that a healthy mind and body lead to better coding, so I try to balance my love for technology with a love for the great outdoors. Just remember: if you can't find me at my desk, I'm probably out for a run! I have experience with Python/Django, JavaScript/Vue.js, and a little bit of Go. I'm also an active public speaker and open source contributor.

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.

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.

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.

Shubham Gautam is a Senior Software Engineer at Headout, where he builds large-scale, performance-sensitive frontend systems powering global travel experiences. His work spans AI-assisted media pipelines, browser-based multi-track audio engines, and TypeScript-first architectures designed for reliability and scale. He has led initiatives across frontend infrastructure, design systems, real-time synchronization layers, and conversion-focused product engineering, balancing architectural rigor with measurable business impact. Shubham enjoys exploring the intersection of deterministic systems, browser performance, and modern React tooling.

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.

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.

I'm David Villamarin, a Front-End Software Developer with over 5 years of expertise in JavaScript and TypeScript. I actively contribute to open-source initiatives and like to share my knowledge and experiences with the broader software community. Beyond coding, I am an avid chess player, sports enthusiast, and eclectic reader. I look forward to contributing to the community and exchanging insights with fellow developers.

Arsalan Khattak is a Developer Advocate passionate about modern web technologies. He has created content for GitHub Education and spoken at major events like Google DevFest and Microsoft Reactor. Beyond tech, Arsalan is an adventurer and motorcycle enthusiast.

Theo is a full stack designer, developer, and entrepreneur, passionate about dev tools and building simple solutions to complex problems. He's worked in a range of industries for companies like Breather, System Initiative, and Clay.

Łukasz Jaźwa, CTO at Workflow Builder. Passionate about diagramming and algorithm design, with a strong focus on graph theory. Loves escaping to the mountains for a good trek after hours.

Omri is a Tech Lead at monday.com with over a decade of industry experience. For the past several years, he has been part of the DevTools group, focused on building user-friendly, well-documented tools that enhance developer efficiency and satisfaction.

Nica Mellifera (She/Her) was a developer for seven years before moving into developer relations. She specializes in containerized workloads, serverless, and public cloud engineering. Nica has long been an advocate for open standards, and has given talks and workshops on OpenTelemetry and Kubernetes architecture.