Vitaly is a professor of functional programming, programming language theory and computation theory, a member of the Haskell programming language standardization committee and the Haskell GHC compiler development supervisory committee, the author of the book "Haskell in Depth" (Manning Publications).
Guillermo Rauch is the founder of ZEIT, co-creator of Now and Next.js, and former CTO and co-founder of LearnBoost and Cloudup, acquired by in 2013. His background and expertise are in the realtime web. He's the creator of, one of the most popular JavaScript projects on GitHub, with implementations in many different programming languages and frameworks. He created the first MongoDB ORM for Node.JS, MongooseJS. Before that, he was a core developer of the MooTools JavaScript framework. He's the author of "Smashing Node.JS" published by Wiley in 2012, best-selling book about Node.JS on Amazon in multiple programming categories. He's spoken at dozens of conferences all around the world about JavaScript and the realtime web, such as O'Reilly OSCon, QCon, and NDC. Originally from Argentina, he dropped out of high school and moved to the US to pursue his passions in the San Francisco startup world. He's passionate about open source as an education medium. He's a former mentor of an Open Source Engineering class organized and pioneered by Stanford, with students from Harvard, MIT, Carnegie Mellon, UPenn, Columbia, and others.
Dmitry was graduated from The State University of Management where he took MBI degree in 2008. Ph.D. in Pedagogy, author of "Lifelong learning concept" monography. At 27 he became a CIO of the large research and production group, in 2012 he joined the Mail.Ru team and headed the department of research and production. Since 2016 he is head of Rostec corporate network academy, since 2017 he is a senior vice president of "ProObraz". A councilor of Moscow Aviation Institute rector, a member of social and business council under the government of the Russian Federation. Founder of Otus, an online education company.
Yulia Startsev is a programmer at Mozilla, recently working on Spidermonkey. She is also one of three co-chairs of Ecma's TC39, the standardizing body for JavaScript.
Nicolò has been a core Babel developer since 2017, and he has helped with the development of different ECMAScript proposal. When offline, he is a mathematics student in Turin, Italy.
Ivan Akulov PerfPerfPerf
Google Developer Expert in web technologies. Founder of PerfPerfPerf which helps other companies earn more money by making web applications faster. Acts on the stage and writes articles.
Michael Saboff is a Software Engineer working on the JavaScriptCore virtual machine for the past 9 years. He is a member of the JS standards committee, TC-39.
Anna Herlihy is a senior software engineer working for MongoDB in Stockholm. She is a contributor to PyMongo, MongoDB, bson-numpy, and a few other MongoDB Drivers but is working now on Compass, the GUI for MongoDB. She enjoys hiking, biking, climbing, and is most happy when she can do her work outdoors.
Lucas is a Brazilian software engineer living in London. He breathes JavaScript and is passionate about open source. He is a core team member of Chai.js and Sinon.js, two of the most popular libraries in the JS ecosystem, and is always trying to find better and more efficient ways to solve problems. His motto is "strive to be lazy".
Nicolas Belmonte is VP of Maps at Mapbox. Nicolas is responsible for C++, iOS, Android, Web and Embedded map rendering engines, Maps APIs for vector, raster and static maps and Map Design. Prior to Mapbox Nicolas was Director of Engineering and Head of Data Visualization at Uber. Nicolas' group built advanced products to explore self-driving car, geospatial and business data in the context of urban mobility. Prior to Uber Nicolas was Staff Engineer at Twitter, building novel public-facing visualizations published at the NYTimes, Cannes Lions and during Twitter IPO. Nicolas' interests cover data visualization, computer graphics, data and math art, and the Web.
Researcher, bicycle developer, web standards evangelist, mastermind, critic, speaker. Author of CSSTree, discovery.js, basis.js and others, maintainer of CSSO.
Mathieu "p01" Henri is a Senior Engineer at Microsoft in Oslo, Norway, and previously worked on the Opera web browser. At night he is a creative coder & demoscene artist specialized in real time audio visual animations in a few hundred bytes for the web platform, PC and Atari ST computers.
Eliran is an experienced FE developer, specialized in B2C applications Founder and developer @ Co-Organiser @ AngularUP Annual Conference Co-Organiser and manager @ Angular-IL meetup Writer for <a href="" target="_blank">AngularInDepth</a>
Andrey Melikhov Yandex.Money
Andrey is a lead frontend developer at Yandex.Money. In his free time, he engages in a non-commercial project "Devschacht", where he translates and writes articles about web development. Also, he makes podcasts "Devschacht" and "Midnight Frontend" and actively participates in the life of the local and the global frontend community.
UI Practice Lead in IPONWEB. The all-time host of the Frontend Weekend podcast and active member of the frontend community. Ex-actor of the student theatre of the faculty of Computational Mathematics and Cybernetics of Moscow State University.
Romulo Cintra CaixaBank "Silk"
Technology enthusiast, working in Software development and Architectures for more than 10 years. Contributor in Open Source projects, TC39 Delegate, and blogger in part-time. His main goal is to democratize technology and empower developers, teams, and companies mostly in the financial sector to build better products. His main focuses are the web, mobile, and cloud. He loves and advocates for the future of the internet and decentralized technology culture where all the globe is connected.
Zar Zakharov Tinkoff Journal
Zar is more than 10 years in web development. He was a leader of the frontend in e-travel startup Voyanga. He was the first one who wrote Russian-language AngularJS courses. Worked in Alfa-Bank for 3 years where he developed a retail business and helped users to get services faster. Now he's working in fast-growing Tinkoff project — "T—Ж" where he applies best practices including creating a design system with fast delivery of changes from Figma.
Lead frontend developer at HeadHunter. Started from an intern at HeadHunter developers school and now he has been teaching for over 5 years in this school. Nikita has been working at 5 different teams during all career. A member of the architecture team for the last year. The security of user data, the architecture, and the infrastructure of the project are the most important things at his work.
Alexander led design in e-travel startup Voyanga. Then he was a senior designer in SberTech where he worked on online banking. Now he is a leader of the product design department of the TradingView fintech project.
Miguel works as Enabler Front End at Adevinta, a marketplace specialist based in Barcelona, Spain. He accelerates teams by defining a common platform, building cross tools, sharing best practices and helping to solve meaningful problems. He is passionate about performance and is always looking for solutions through technology to offer the best experience to users.
GraphQL rockstar, consultant and trainer, developer of Internet products, OSS maintainer. Since 2001 Pavel's main specialization is web technologies. He has extensive practical knowledge on back-end/front-end development, administration, and architecture. Since the end of 2015, Pavel's main focus is on isomorphic applications. In summer 2016 he began the development of graphql-compose (GraphQL schema generator) in open source.
Prashant is a frontend developer at Frontmen in the Netherlands. Apart from coding, he is also responsible to create a technical trajectory for developers within Frontmen. While not coding, he likes to travel, preach about technologies and break a sweat at the basketball court with friends.
7 years in IT: at different times supported, launched and developed projects in the largest financial companies in Russia. Now specializes in frontend developing of big web applications. Christian, husband, coder, bushcrafter.
Andrey Okonetchnikov Component-Driven
Andrey is a frontend engineer and an interaction designer, specializing in UX, design systems and modern frontend architecture. He has been designing and developing real products using web technologies for the past 20 years. Andrey is a co-organizer of ReasonConf, ReactVienna, co-creator of MacOS app ColorSnapper, author and maintainer of several popular open source projects like react-dropzone and lint-staged, international speaker and workshops coach.
Eric builds applications for the web using full-stack Javascript. Lately, he enjoys using React and GraphQL, with a functional programming approach. He has built software for Native Instruments, RedBull, Google, Zeit Online, and many more.
Ujjwal is an undergrad student, an open source software fanatic and an active member of the JavaScript ecosystem. A Node.js core collaborator, Electron maintainer, Google Summer of Code mentor and ex-student, he has been working with the V8 team and the TC39 committee to help make JavaScript better, one commit at a time. He loves to talk about open source software, DevOps, JavaScript, Web Standards and the Open Web.
Andrey's been involved in design and development of various web apps and systems for many years and always enjoyed it. Came a long road from a greenhorn junior developer in a small product team to a solution architect in a large outsourcing company. Some time ago joined Hazelcast engineering team and started working on the company's products, including Node.js client library. First met and fell in love with Node.js during the good old v0.12.0 era. Enjoys non-trivial technical challenges that require a deep dive. Has a personal blog, maintains several open source libraries. Constantly learns new stuff from others and shares his experience with the community.
Alexandra Kalinina Valor Software
10+ years of programming experience. Well skilled in web development: figuring out a problem where the abstraction leaked. Great experience in writing unit/integration/e2e/b2b tests using mocha/chai/sinon. Strong experience in major web development technologies, design patterns, DB design, algorithms development and data structures. Some experience in project specification and technical documentation development.
Software Engineer at Futurice. Working with JavaScript, TypeScript, React Native. Public technical speaker. Passionate about UI engineering, statecharts and reactivity.
Developer with 9 years of experience, works as Complex Engineer in Fintier company that develops a marketplace which provides innovative financial services and accepts payments worldwide. Related open source: - [PHPSA]( — static analyzer on PHP for PHP; - [GHubber]( — mobile client for Github powered by React Native; - [StaticScript]( — language on top of TypeScript as frontend, and LLVM framework as backend. Dmitry also was a contributor to Zephir Language & Phalcon framework.