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!

Marissa Masangcay
Cloudinary, USA
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.
Richard Moss
Deventures, UK
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.

Oleksandr Tryshchenko
Personio, Netherlands
Oleksandr Tryshchenko - Senior Engineering Manager @ Personio
He has experience with micro-frontends across three SaaS companies.
Initiated and led the migration of FreshBooks from a monolithic UI to a micro-frontends architecture.
Currently, he serves as a Senior Engineering Manager at Personio, where he leads the efforts to migrate the entire organization, which encompasses over 130 micro-frontends, to a new design system.

Mike Ryan
Polaris, USA
Mike Ryan is the co-founder of Polaris, an AI-powered site reliability platform. Mike is a Google Developer Expert specializing in software architecture. Mike has a strong background in working with IoT in industrial manufacturing and designing sophisticated and elegant user experiences. When not in front of his MBP you can find Mike hiking the backcountry in the Pacific Northwest.

Abde Ali Lokhandwala
Booking.com, Netherlands
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.

David Burrowes
Split.io, USA
David Burrowes is a software engineer at Split.io with a decade of experience developing web applications for companies like Box, Delphix, and VMware. Having worked without feature flags, and with clunky in-house feature flagging frameworks, David is deliriously happy to have all of Split's capabilities at his disposal for every project. For fun, and to prove he’s more Star Trek than Star Wars, David likes to randomly quote large sections for Star Trek II: The Wrath of Khan.

Ariene Maiara
G2i, Brazil
Passionate about technology, innovation, and learning new programming languages, I have been working with software and web development for over 9 years. I have strong front-end and back-end skills. Currently working with React/React Native. I also have experience working with agile methodologies such as Scrum and Kanban.

Guilherme Vieira
Shopify, Canada
You might be familiar with HTTP GraphQL APIs. Did you know GraphQL does not have to be delivered over HTTP? We can use GraphQL in some different contexts. asynchronous queries, batch operations, user-provided scripts, WebAssembly, webhooks, and many more. We will explore how Shopify uses GraphQL in different contexts and how you can extend your current GraphQL schema beyond HTTP APIs.

Itai Hanski
Descope, Israel
For more than twelve years, Itai has been creating on the full spectrum of software development. Anything from simple POCs to intricately complex systems, from native mobile development to fully fledged backend architecture, from libraries and SDKs to client facing applications.

Kevin Gao
Descope, USA
Kevin is an engineer who is passionate about solving problems and learning new skills. When he's not speaking to customers or coding through sprints, you'll find Kevin either on the road driving fast up a twisty mountain road, reading historical fiction books, or looking for a new place in the world to travel to and explore.

David Woller
Rollbar, USA
David works as a post-sales Solutions Engineer at Rollbar, with a focus on customer enablement and custom solutions delivery. He is passionate about anything that combines technical learning with customer interaction, and is curious about finding ways to apply technology to improve the UX of everyday life. He has specific knowledge around software observability practices, and worked as a Professional Services Consultant at Sumo Logic before joining Rollbar in August. David earned a BS in Computer Science from Auburn University.

Pramod Shenoy
Cloudinary, USA
Pramod Shenoy is currently working as a Solutions Architect at Cloudinary. His interests align with his 8 years of experience at Akamai and Catchpoint in web performance and optimization, CDNs and monitoring digital experiences. Outside of work Pramod likes to hike, read blogs on tech, sports and stock markets.

Amy Bass
Docker, USA
As a youngster, I had an early interest in computers. I quickly learned to disassemble and reassemble my family's Tandy 1000 without much effort. This passion only grew as I got older. In college, I became very interested in helping to bridge the growing digital divide and started a student organization, Tech Serv, at Drexel University. After college, I started my career as a data analyst but quickly found a career in Product Management. Here, I was able to combine my love for technology with my passion for improving the lives of others. Since that time, I've been a product manager in a variety of industries including MarTech and HealthTech. Now at Docker, I hope to continue on my journey by improving the lives of developers and helping solve their daily challenges.

Alexandra Buckalew
GraphCMS, Germany
Alex is an experienced marketer and screenwriter with over 10 years of experience. A natural storyteller, Alex spends her free time writing novels and screenplays and is driven through a constant need to be constantly learning professionally and personally. Originally from Texas, she has lived in New York City, and now Berlin, Germany.

Serkan Ozal
Thundra, Turkey
A Computer Engineering MSc on Big Data and Cloud Computing with Hadoop and Hive at METU (Middle East Technical University).
Here is my summary:
* Big data and Cloud computing architect/researcher/developer
* Low-level Java and JVM researcher/developer/hacker
* AWS Technical and Business Consulting Partner
* "Off-Heap Storage" and "Bytecode Instrumentation" Ninja
* Oracle OpenSource Contributor
* PhD candidate about Indexing on Hadoop and Hive
* Always thinking on open-source project ideas