JavaScript experts, mentors, speakers

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.

Senior Software Engineer and consultant in Tektit Consulting. IT trainer at Infoshare Academy. Previously worked on Jira Cloud and Atlassian Forge. He talks and records stuff on Front-end and WebDevelopment related stuff.

Tiki Lobel is a fintech software developer who leads a team at Rapyd to liberate global commerce and connect the world’s disparate payment systems into a single integrated network. Her team focuses on core API development and Tiki’s ability to handle multiple projects simultaneously, and her understanding of complex dependencies within a larger system, make her an integral part of all product development in the company.

Marissa Masangcay is a Technical Marketing Specialist for Cloudinary and has worked for the company since 2017. She has also served as one of Cloudinary’s Developer Support Engineers, where she responded to customers’ technical support requests and feature-related questions, as well as debugged customer issues and wrote code samples in multiple development frameworks. She has also served as a volunteer instructor for Girls Who Code, which is a nonprofit dedicated to teaching girls in grades 6-12 the fundamentals of coding. Marissa graduated with her bachelor’s degree in computer science from the University of San Francisco.

Shaundai is a front end Senior Software Engineer (Netflix) based in Georgia, US. Through her work as a course instructor (tsforjs.com) and her YouTube channel (youtube.com/shaundai), she aims to make programming interesting and approachable for all.

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.

Richard is a Sr. Partner Solutions Architect at AWS focusing on Application modernization using Serverless and Containers. During his 3-year tenure at AWS he has played a pivotal role assisting partners & customers in various industries with their cloud adoption and modernization strategies. Richard collaborates with the development teams and engineering leaders to optimize software delivery in the cloud, emphasizing best practices and AWS's capabilities.

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.

Livecoder, music technologist, educator. creative coding for sound, visuals and algorithmic compositions. maxmsp, jitter, javascript, pd, p5.js, mercury.

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.

Stephanie is a Senior Frontend Engineer at Beamery, and a seasoned full-stack engineer with considerable experience in the financial and public sectors. She's a passionate advocate for tech-for-good, diversity, and developer education. As a speaker, she's known for her entertaining talks and irreverent sense of humour. She is currently developing Beamery's AI-powered talent lifecycle management platform.

I'm a frontend engineer at Polar Signals working on continuous profiling visualization tools. When I'm not coding, I enjoy watching The Office and taking pictures on my analog camera.

I'm Shubham, a Software Engineer at Headout who loves to experiment with different technologies and use them to create useful applications. I'm particularly fond of TypeScript, Web Performance, Frontend Tooling and I'm always ready to engage in a friendly debate on the topic of aliens' existence. As an engineer, I'm passionate about continuous learning and personal growth, and I always make sure to stay up-to-date with the latest developments in my field. Collaborating with my colleagues and learning from their expertise is something I enjoy. I'm always looking for ways to improve my own skills and contribute to the success of the team.

An avid technologist, Richard has worked on a variety of projects with a diverse range of people, crossing technologies, languages, and continents. With a particular focus on the front end space, he is currently working across teams to help build and develop the tech function at Sainsbury’s. Passionate about teaching and sharing, he’s also a co-organizer of JavaScript London and was previously a senior coach at React GraphQL Academy helping professional devs take their skills to the next level.

Alex is Partner Program Manager on the Microsoft Edge team and Blink API OWNER. Before joining Edge in 2021, he worked on Chrome’s Web Platform team for a dozen years where he helped design many new features. He served as overall Tech Lead for Chromium’s Project Fugu, lead Chrome’s Standards work, and acted as a platform strategist for the web. He also served as a member of ECMA TC39 for more than a decade and was elected to three terms on the W3C’s Technical Architecture Group. His technical projects have included Fugu, Progressive Web Apps, Service Workers, and Web Components, along with ES6 features like Classes and Promises. Previously he helped build Google Chrome Frame and led the Dojo Toolkit project. Alex plays for Team Web.

Hey, I am Joban, and I am currently working as a software engineer at Microsoft Azure. I have been developing planet-scale backend services for the past 2 years and would like to share my experience with Microsoft Orleans Framework, we have been using at Microsoft Teams.

Kat works as Quality Engineer at Zoopla. Tried lots of paths: fine arts, comparative literature, social psychology and cognitive science studies before discovering the most enjoyable so far tech path. Kat solves automation testing challenges at work and jigsaw after work. Lives in Scotland.

Senior Front End Developer at DeepL, working on Design Systems

Frontend Developer at Allganize, Host at The Junior Developer Podcast.

Ante is a skilled and hearing-impaired Senior Software Engineer at Infobip with a strong interest in Web and the technical side of it. With permanent 55% hearing loss in both ears, he’s a testament to the power of determination and hard work which often speaks louder than words. He has a big love and soft spot for rubber ducks and excels at presenting and educating, React, JavaScript, Node.JS, build processes, automation and improving developer and customer experiences. He always shares his own experiences, especially in accessibility. Ante's goal is to always improve, making things more efficient and user-friendly. When he steps away from coding, Ante enjoys discovering new music, long and scenic walks, and capturing the beauty of the world through his hobby of photography, traveling, and travel blogging. As a big extrovert at heart, he’s always up for sharing a laugh, interesting travel stories, or discussing the latest tech topics. Approachable and driven, Ante shows that hearing impairment is just a part of his journey, not the end of his story. If you have a moment, his doors are always open for a chat, so don't hesitate to start a discussion with him - he is more than happy to connect and talk with you!

I'm Emanuel - Sr. Cloud Application Architect at AWS and I am helping customers to build modern, secure and scalable application on AWS. I evangelize the user of serverless technologies to allow customers to focus on their business.

Distinguished Game Developer and Backend Engineer with a solid track record of 8+ years in constructing sophisticated APIs, microservices, and libraries, and a specialized focus on game design and development. As a Senior Software Engineer at Booking.com, a premier global travel accommodation provider, I am leading the way for tech stack modernisation, shaping the architectural vision and technical strategy, and building recommendation & ranking systems that support 10 million users per day. Furthermore, I am mentoring engineers and fostering a thriving technical environment. My experience extends to developing compelling games and interactive experiences, having designed intricate game worlds using procedural generation and artificial intelligence. My expertise in JavaScript and Python game libraries, combined with my knowledge of AI and ML models, equips me to leverage the power of generative AI in creating immersive gaming environments. This unique blend of skills ensures I am at the forefront of innovative game development, thereby enhancing the gaming experience for players across the globe. My foray into game development commenced at Lazy8Games as a Software Engineer, where I designed and prototyped scalable, reliable game interfaces using Unity Engine and Photon Networking. I have a history of creating award-winning, visually compelling and technically challenging games such as: "Dystopian Skies" - recognised as the #1 Mobile Game at an inter-collegiate game-dev competition. It is a multiplayer 3D game set in a post-apocalyptic scenario, using a variation of the ROAM algorithm for earth simulation. In the game, players combat space drones to reclaim infested land on earth. "Arcane Aero" - A side-scrolling action arcade game for Android, developed as part of an entrepreneurial project Blooming Pixel, and live on the Google Play Store. In my subsequent role as a Software Engineer, I designed and developed intricate engineering applications using multiple programming languages and frameworks, including Java, C++, OpenSceneGraph, OpenGL, Qt, and C# across Windows, Linux, and Android platforms. Here, I particularly worked on GIS Applications, where I developed modules in the digital graphics domain, leveraging my understanding of performance graphics, a crucial component in game development. I also designed a GPS-based tracking application on Android with map caching, besides maintaining a software SDK stack on Linux. My technical prowess extends to Service reliability, System design, Kubernetes, Java, Kafka, Protobuf, BigData platforms (Apache Hadoop/Hive/Oozie/Spark), C#, Python, Perl, MVC Frameworks, JavaScript Frameworks, and Android app development, backed by an engineering degree from IIT Bombay (Mumbai), a leading engineering university in Asia. As a thought leader, I enjoy exploring and speaking about the intersection of AI, game development, and backend engineering, and frequently share these insights through technical speaking engagements. My other passions include chess and alpine skiing. Continually pushing the envelope in the gaming industry, I relish the challenge of crafting unique gaming experiences through the power of generative AI.

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.

Haris is a Software Engineer at Grafana Labs, where he makes contributions to open-source Grafana. Currently, he’s on the Explore squad, focused on improving data troubleshooting and discovery experience.