Мацийський

Frontend Developer​
Matsytskyi Serhii
15+ years of experience in building complex web applications, browser games, and high-performance
visualizations (Web Graphics/GameDev/Data Visualization)
Specialized in Pixi.js, D3.js, and real-time rendering systems.
Experienced in leading projects, designing architecture, and optimizing performance-critical systems.
Looking for roles in Web Graphics, or complex frontend systems.

​Contacts
​Linkedin: [открыть контакты](см. выше в блоке «контактная информация»)
​Email: [открыть контакты](см. выше в блоке «контактная информация»)
Telegram: https://t.me/matsitskyss
GitHub: https://github.com/MatsMaker
Upwork: https://www.upwork.com/fl/sergeymats
Location: Ukraine, Kyiv/Poltava.

Core skills
Core stack:

●​ Pixi.js, D3.js, TypeScript
●​ React, Svelte
●​ Node.js (NestJS, Express)
●​ AWS

Additional:

●​ Docker, Webpack
●​ PostgreSQL, MongoDB, Redis
●​ Chrome extension, Android, Linux
●​ Mentoring

​Projects list
​Sweeptech: 2026 CS-go lootbox services​
​ Svelte, Next.js
​Legend of ancient Greece: 2021-2026. Browser strategy game.
​Pixi.js, TypeScript, Webpack, Node.js
WebTradeTerminal: sep2019 - oct2021.
​ D3.js, SVG charts based on stock-chart, React, webpack, RDP
ModulTrade: May-Sep 2019
Node.js, Express.js, MongoDB, mongoose, Docker, React, Google Analytics,Tag manager…
Gulsy: May - Sep 2019
app React native, React, Expo
 Crypto internal: Apr 2019 - May 2019
​ Nest.js, Ethereum, LiteCoin, EOS.IO
Digicode slots: October 2018 – May 2019
​ Nest.js, TypeORM, Docker, Jenkins, Blockchain, Kibana​
iSoftBet: oct 2017 - oct 2018 Small gambling. Small games like slot, blackjack, roulette
Tech: Pixi.js, TypeScript, GSAP, nunjucks, own game framework
SoundingBoardinc: aug - oct 2017 Scalable, professional, real-time coaching for emerging leaders
​ and new managers
​ Node.js, express, mocha, mongodb, firebase…
Revelar: July – 2017 Medical services portal
​ Angular2+, RxJs, D3.js, UI Bootstrap
SkodaEvent: July 2017 Questionnaire in the form of a small game
​ Angular2+
Timelinepi: April - July 2017
​ AWS, Node.js, koa.js, redis, postgresql, angular, angular material...
Top audio energy users: jan 2017 - feb 2017
​ Node.js, redis, express, sockets...
AstroPod: oct 2015 - jan 2017
​Node.js, express, aws-sdk, sails, GraphicsMagick, ejs,
Amazon(EC2/S3/DynamoDB/SES/Lambda)...
Build a HipChat add-on: Sep 2016 - Oct 2016
​ Node.js, ReactJS, Redis, ngrok, and other, HipChat REST API...
Signature doc: may 2016 - aug 2016 RightSignature e-signature software replicates the
pen-and-paper ​ signing experience in any web browser.
​Angularjs, dropzone, jstree, moment, gulp, eslint, and other.
Shoutit(Quattru): jan 2016 - jul 2016
​ ReactJs, Redux, D3.js, ReactTestUtils, Angularjs, webpack, Docker, and others.
Mailhighlight: Dec 2015
​ chrome extensions, Google cloud, jquery...
Sam Silverstein: 2014 - 2015 Webview app for android and iOs. Site of News.
​ mongodb, angularjs, node.js...
Ppeacefuldumpling: 2014 - 2015
​ jquery, WordPress, schema.orgredux-form...
Lisa login: 2014 - 2015 - markup, jquery, css...
Agenda2: 2015 (two month) - showing statistic
​ marionettejs, backbone.js...
NEST kids concept store: Jan 2013 - Feb 2015
​ markup, jquery, css...

Pet projects
Shot-game: Unity, C# - mobile shooter with tower defense elements ​
Agricola-city: Pixi.js, redux, typescript - game preview isometric map on PIXI js
Scratcher-game: Pixi.js, redux- bonus scratcher game where User needs to find 3 symbols to win​
Pixijs-remote-helper: Chrome extension - the tool to help debug pixijs
Battle-tanks - Vue, node.js, socket, express, phaser, mongoose - web multiplayer game.​
Contribute to:
​ Pixi.js devtools(chrome extension) https://github.com/bfanger/pixi-inspector ​
​ node-debugger (Debugger For Nodejs) https://atom.io/packages/node-debugger
Npm by me:
​ Digicode-secret-k8s-env Define k8s secrets values from file to process envarment
 ​ Digicodeslots winston logger This package is nestjs logger based on winston logger

Workplaces
Mersie Limited(2025 - 2026) - javaScript Game developer
Qumaron(2021 - 2025) - javaScript Game developer
Profit Center FX (2019 - 2021) – web JavaScript developer
DigiCode (2017- 2019) – web JavaScript developer
Zazmic (2017) – backend developer (part time)
Yanpix (2012- 2017) - web JavaScript developer
Insoft Poltava (2011-2012) - Web developer(php) insoft.poltava.ua
Freelance (2011) – Web developer (php)

Languages
English: Intermediate (B1+)
Ukrainian/Russian: native

Education
​ 2008-2011 - Academician Yuriy Bugay International Scientific And Technical University. Specialist
in automatized systems software, software development engineer.
​ 2004-2008 - Poltava Polytechnic College of National Technical University «Kharkiv Polytechnic
Institute» . Programming for electronic computers and automatized systems. Junior developer
specialist.