Denis Sokolov Email & Phone Number

Amsterdam, Nh, Nl

Amsterdam, North Holland, Netherlands

Keeny is a mobile travel app that gives users more than a million AI-generated audio guides for any destination around the world. It offers a unique way to explore places, from famous landmarks to hidden gems, all from your phone. At Keeny, we leverage cloud-native solutions and cutting-edge AI, as well as cohesive product design, to ensure that our app delivers not only functionality, but also a seamless user experience. We constantly seek the best solutions in strategy, execution, and creativity.

Amsterdam, North Holland, Netherlands

The main role is a frontend developer in the TeamCity product. It is a CI/CD server by JetBrains which is used by over 30,000 customers and millions of users.Responsibilities:- writing clean and efficient code for the client side;- creating frontend architecture;- setting up development processes, CI/CD, code-analysis, testing and building frontend applications;- taking an active part in stand-ups, planning and retrospective meetings;- code reviewing;- refactoring of legacy code, fixing bugs in a complex product with a 16-year history;- interviewing candidates for frontend positions;- discussing and proposing new product features;- mentoring students during internships.Technologies: TypeScript, react.js, redux.js, jest, storybook, react-router, webpack, postcss, kotlin, spring bootMain achievements:- Rewrote old system of displaying build logs. The main challenge was the file size. The old system couldn't show logs larger than 10Mb. It was inefficient and used 100% CPU for 1 minute for the first render. The new system is fast and can handle logs up to 1Gb efficiently. It renders less than 3 seconds. It provides a custom search, filtering by log levels, expanding and collapsing nodes in the log tree, soft-wrap and no-wrap modes for message lines, supports ANSI colors.- Participated in the creation of a system for UI extensions for TeamCity. I added the ability to write plugins using react.js and integrate them into the existing SPA. It provides a useful typed API and documentation for external developers https://www.npmjs.com/package/@jetbrains/teamcity-api- Created frontend architecture and set up full frontend development workflows for the brand new TeamCity Cloud sub-product. It is based on TeamCity Enterprise, but contains cloud specific pages and functionality: instance resource management, user management, product notifications, additional configuration pages and more.- Interviewed 30+ people, hired 4 senior developers and 3 students.

St Petersburg, St Petersburg City, Russia

Same job but other city

St Petersburg, St Petersburg City, Russia

Writing frontend code for a large product for insurance companies. Developing new features and fixing bugs in legacy code.Mentoring junior and middle developers, improving development processes.

Penza, Russia

Managing a technical team for the development of a mobile application in a start-up company. The team consisted of 4 people, developers and UI/UX designer. Adapted agile methodology with two-weeks sprints. Set up and implemented kanban boards. Conducted 1-1 meetings and performance reviews.Hired a UI/UX designer.

Penza, Russia

Created a complex SPA with react.js and redux.js on the client side and server side rendering on node.js. Wrote many unit, integration and functional tests with over 95% coverage.Established the entire developing process using modern methodologies and technologies.

Penza, Russia

Created a new website for the entertainment service https://ifunny.co with more than 200,000 daily active users. Technology stack: es6 and backbone.js, sass/css (with BEM methodology) on the client side and node.js for a proxy caching and server side rendering for the backend. The new website with SEO optimisation doubled the number of users.

Penza, Russia

Full-stack developer in SAAS for accounting. Technology stack: C# ASP.NET, MS SQL, javascrtipt, backbone.js, jQuery, css.Key achievement: created a subsystem for webinars with a streaming player and realtime chats with over 10,000 live participants.

Penza, Russia

Full-stack developer at a local web studio. Technology stack: php, MySQL, javascrtipt, jQuery, css

Penza, Russia

Creation of simple websites for e-commerce. Technology stack: php, MySQL, javascrtipt, jQuery, css.