Roman

Roman Belskiy
Education: ​
University: Ukrainian State University of Science
and Technologies​
Faculty: Automation and computer-integrated
technologies

Tech stack:

Languages DevOps:
▪ JavaScript/TypeScript ▪ K8s Backend
▪ Node.js ▪ GitHub actions ▪ express.js
▪ HTML/CSS ▪ Nest.js
Frontend ▪ TypeORM
Testing Tools ▪ React.js ▪ feathers.js
▪ Cypress ▪ Next.js ▪ knex.js
▪ Jest ▪ redux/thunk/saga ▪ objection.js
▪ mocha ▪ Rx.js ▪ sequelize
▪ chai ▪ Angular4 ▪ swagger
▪ Angular1 ▪ yum/joi/celebrate
Databases ▪ Backbone.js ▪ graphql-js
▪ PostgreSQL ▪ jQuery ▪ CircleCI
▪ Redis ▪ D3(charts) ▪ Docker
▪ MongoDB ▪ less/sass
▪ GraphQL
▪ GetStream
Oktogon Media My Role: tech lead / engineering manager
from Aug 2023​
to Jan 2026
Technologies: AWS services, K8S, Nest.js, MongoDb, Next.js

I was responsible for building a new CMS without clear
requirements wich finally successfully released. It was a CMS
for multisite content management that supports photo and
video content. The new CMS has replaced multiple old CMS
that are popular in that domain. It was created specifically for
the project's needs and the logic of releasing content.
Infrastructura was hosted in AWS, managed by K8S. The
backend was implemented using a microservices architecture
and built with Nest.js. The frontend was built on Next.js app
router. Also, the project was closely integrated with a few
third-party services to manage the affiliate program, user
subscriptions, content protection, and related features.

Tealbook https://www.tealbook.com/
from Feb 2022​
to Feb 2023
Technologies: Google Cloud Platform, Nest.js, TypeORM,
express, react, PostgreSQL.
TealBook is a data platform that collects and aggregates data about
suppliers to make it easy to discover and evaluate suppliers. It
provides access to digestible supplier overviews and descriptions of
products and services, information about a supplier’s geographic
reach, NAICS codes, and suppliers with similar offerings.

Lunchtable https://lunchtable.com/
from Sep 2020​
to Feb 2022
Technologies: MySql, Redis, sequelize, express, joi, react,
react hooks, redux, formik, GetStream chat, GetStream feed,
mocha, chai, AdminBro, tailwindcss.

The site is technically a job board site with some social
networking features and live video, but the job features are
fairly sparse and the focus has been more on the live streams
social components. There are 2 dev teams right now our team
 and the client has a small team as well. The project has
changed alot from the beginning so its going through some
transitions mostly migrating from PHP to Node for the
backend and cleaning up the code as we go along since the
early days were about speed more than anything else...

Syndicode (outsource) Nodus-Medical (from Dec 2019 to Aug 2020)
from 1 Oct 2019​ https://nodus-medical.com/
to 1 Aug 2020

Technologies: Postgres, Redis, knex, Objection.js, express,
joi, react, redux, Formik, CircleCI, swagger, I18n, ReactAdmin.

This is a great project that helps surgeons do their job better.

Inspired by aviation’s impressive efficiency and safety
achievements and leveraging modern technology, we’ve built
a digital assistant for surgical teams. Our assistant allows
customers to benefit from technologically enabled
standardization, improve collaboration in the OR, and
automate tedious documentation tasks.

Surgeons can plan procedures based on a library of
customizable standards, visualize a shared navigation plan for
the entire OR team, and, finally, create reports with a single
click.

InstaGenius (from Oct 2019 to Dec 2019)
https://instagenius.com/

I worked as a frontend developer and my main stack was
React.js/redux/thunk. The project was based on the
material-UI framework which we customize according to our
designs.

Basically my responsibilities were fixing bugs and creating
new functionality. I joined the team to help the team project
because we have had a short time to release MVP. The
project developed in urgent conditions and our main goal was
 to release new features as soon as possible.

I had a lot of refactoring cause the project was developed by
many different developers with different skills and levels.

This project was released successfully and works as
https://instagenius.com/.

Anadea.inc (outsource) Technologies: React, REST, GraphQL, D3, ZPL, plain JS,
from 10 Oct 2017 sockets, Twilio (video chat)
to 1 Oct 2019

E-Learning project:
Online system interactive trains English to kids.
There are lessons passed in the virtual classroom where
participants can communicate with each other using Twilio
video chat. Using e-markers children can paint together on
the whiteboard, share their screen and YouTube video, take a
quiz, play the interactive games or see presentation slides
which teacher shows to them.
Each lesson is taught by teacher using individual program.

MyLSD project:
A medical system for physicians and Centogene company
staff which helps to diagnose patients with Lysosomal
Storage Disorder diseases (LSD). Centogene is a worldwide
leader in the field of genetic diagnostics for rare hereditary
diseases https://www.centogene.com
The project provides patients of Gaucher Disease with an
easy to use mobile application to help the patients to keep
track of their state of health and assists them to gain a broad
picture of their personal condition. The MyLSD-App enables
you to track the results of your biomarker testing helping you
to monitor biomarker levels in your body.

SSK (Skriftsproglig Kompetence) project:
This is an innovative project for students of the 7th grade, which
helps to assess the understanding of the genre and the language
as a whole. The level of knowledge in grammar, syntax, ability to
 express oneself in different genres is checked.

LoopMe
from Mar 2017 https://loopme.com/
to 10 Oct 2017

Self-serving system to manage the advertising companies
which specialize in mobile video and rich media. The platform
uses a powerful combination of attribution, Artificial
Intelligence and analytics to deliver outstanding campaign
performance.

Technologies: Angular 4, GraphQL, RXjs, TypeScript

Frontend part development for advertising campaigns
system management.

Growth Fountain
from Jan 2017 https://growthfountain.com/
to Feb 2017

Business investing app.

Technologies: Node.JS (version 8), wkhtmltopdf,
Passport.JS, JWT, PostgreSQL

Microservice development for the generation of electronic
documents.

The documents were initially typed in html page where user
data was inserted and signed with electronic keys, after that
they were converted into pdf which the user could already
download. Passport.JS was used for authorization and
PostgreSQL as the primary repository. Sequelize was used for
PostgreSQL.

Nous DMP This is a highly loaded platform to identify and create
(Noosphere) user profiles, which were used for targeted advertising.
from Jan 2015
to Dec 2017 Technologies: Node.JS (vO.10, v0.12, v4, v6),
Express.JS, Angular 1, Require.JS, kafka, zeroMQ,
docker, linux, graphite + grafana, AWS S3, Redis,
 apache flume

JS Full-Stack.
Development of a new function for the admin to provide
system operations and integration with new partners.
Data transfer protocols: http, tcp, telnet, udp. Two types
of queues were used for the project: kafka and zeroMQ,
for communication of microservices. Express.JS was
used for http and REST-API. Redis for server-side
caching, the main repository was Cassandra. Testing
stack: Mocha, Sinon, Chai.

Audiko http://apps.audiko.net/
from Jun 2014
Сreating ringtones app for mobile phones where you can select
to Nov 2014
from the list of existing ringtones or upload a track and create
ringtone by yourself.

Technologies: JQuery, Backbone.JS, Require.JS, Grunt.

Development of mobile sites of the app.

Development of a mobile site for iOS, support of existing
Android site.

Gizomenu http://gizomenu.ru/
from Dec 2013 to Jun 2014
Restaurant automation system.

Technologies: JQuery, Socket.io

Front-end part development. Restaurant electronic menu
on tablets.