EXPERIENCE
KOSTYA.Z
BACK-END DEVELOPER / SEEDIUM
2021 – Present
LANGUAGES
ENGLISH UPPER-INTERMIDIATE
UKRAINIAN NATIVE
RUSSIAN FLUENT
Picflow. The modern image gallery and collaboration platform for creative
professionals. Service where you can upload and store terabytes of your
images. Share them with you family, friends, colleagues or customers.
Create a flexible layout to display galleries.
Responsibilities:
TECH SKILLS
TYPESCRIPT
NODE.JS
NEST.JS
WEBSOCKETS
FASTIFY
POSTGRESQL
AWS
DOCKER
STRIPE
HTML5/ CSS3
REACT
REDUX
NEXT.JS
SAGA
MUI
REACT-QUERY
STYLED COMPONENTS
KUBERNETES
TERRAFORM
REACT NATIVE
EXPO
MONGODB
MYSQL
REDIS
POSTGRES
MOCHA
LARAVEL
MICROSERVICES
KAFKA
Developed scalable service which handles uploading terabytes of
images.
Technologies: NodeJS, Typescript, NestJS, Fastify, Bull.js, Event Based
Architecture, Websockets, AWS ECS in horizontal scalable mode, AWS
Lambda, AWS ApiGateway, AWS S3, AWS Secret manager, Postgres on AWS
RDS, Redis, Kafka on AWS MSK, Customer.io, Auth0
BACK-END DEVELOPER / SEEDIUM-
SmarterContact is SMS platform which sends millions SMS per month.
Responsibilities:
Transferred a lot of microservices deployed on one instance to
Kubernetes with secure approach to handle high loading.
Technologies: NodeJS, Javascript, Express, MongoDB, Kubernetes on EKS,
Twilio, Microservices, Auth0
BACK-END DEVELOPER / SEEDIUM
2019 – Present
Healthplate is a healthcare app that's building a healthier world. Most of
specification under NDA. This project assumes.
Responsibilities:
Developed secure and highloading application based on Kubernetes
and following various complaints like HIPAA, GDPR, etc.
Technologies: NodeJs, Typescript, NestJS, Fastify, Bull.js, Protobuf for
Kafka events serialization, GRPC, SendGrid, Google and AppStore IAP,
MongoDB, ElasticSearch, Kafka, Kubernetes on GKE, Vault, Istio, Auth0,
GCP Pub/Sub, Prometheus, Grafana.
FULLSTACK DEVELOPER, MOBILE DEVELOPER /
SEEDIUM
CONTACT US:
-
HerHeadquarters is a game-changing collaborating app exclusive to women
entrepreneurs and freelancers within the Fashion, Beauty, Entertainment,
Events, and Public Relations industries.
-
PERSONAL PROFILE
Back-end developer with 6+ years
of experience. I am focused on
Responsibilities:
Conduct full cycle developing beginning from the backend
architecture to various frontend clients.
Technologies: NodeJS, Typescript, Fastify, MongoDB, Redis, Socket.IO, JWT
Authorization, Stripe, ReactJS, Redux, Redux Saga, Styled components,
Reselect, Redux Form, Normalizr, AWS (S3, CloudFront, ECS, EC2,
Codepipeline).
high-load projects, progressive tech
FULLSTACK DEVELOPER, MOBILE DEVELOPER /
stack, back-end, and front-end
SEEDIUM
development.
SOFT SKILLS
An organized, a diligent and
conscientious developer who
makes a difference in developing
high-value projects.
CONTACT US:
-
2017 – 2018
Tap content. This application aimed for students from different universities.
Tap content allow sharing media content like photo or video with other
students in the same university.
Main functionality:
Compress and resizing image;
Uploading image and video to S3;
CDN;
Native mobile push notification and web push notification;
Collect posts for each users and university;
Authentication via Cognito;
Authentication via native SDK like Google, Facebook, Twitter;
Real time update posts and broadcasts
Technologies: NodeJS, Typescript , MySQL, Cognito Authentication, S3 for
keeping media content, CloudFront for CDN, Socket.IO for real time updating,
CI/CD from AWS for deployment, React, Redux, Semantic UI, ReactVirtualized with Masonry, React-native, Socket.IO.
FULLSTACK DEVELOPER / SEEDIUM-
Fleet Rescope. Service for logistics companies, where customers from
different countries can make order for delivery their cargo.
The technologies described below are used in this project:
Backend NodeJS;
Frontend ReactJS + Redux;
Bootstrap Framework;
DB MySQL;
Infrastructure AWS for deployment application;
CI/CD tools from AWSl;
Authentication via https://auth0.com/
FULLSTACK DEVELOPER / SEEDIUM
2016 – 2017
Royal Rebooking. Service with complicated logic for simplify the delivery of
goods.
The technologies described below are used in this project:
Backend NodeJS;
Frontend ReactJS + Redux;
Material UI Framework;
DB MySQL;
Infrastructure AWS for deployment application;
CI/CD tools from AWS;
Authentication via https://auth0.com/
FRONT-END DEVELOPER / SEEDIUM
Feb 2016 - May 2016
Trip Elephant. Interactive hotel booking website with Expedia API integration,
Google Maps API integration, user registration, using of REST API.
The technologies described below are used in this project:
Python with Django;
React with Redux;
RESTful API;
Expedia API.
FULLSTACK DEVELOPER / MAKEBECOOL
Jul 2015 - Jan 2016
Moverify. This project is public app for Shopify. With this shop user can
import and export his data from his store.
This project use following stack:
Back-end – Laravel;
Front-end - Blade, Shopify Polaris Component, jQuery;
Database -MySQL dev version, MariaDB production;
Web server - nginx with https;
other utils libraries -pusher for establishing websocket connection,
maatwebsite/excel for parsing excel and csv files, rocket-code/shopify
for send request to shopify api.
BACK-END DEVELOPER / MAKEBECOOL
Aug 2015 - Jan 2016
Avdgrupp. This is a common project with standard pages, such as: the
home page, the page with the list of goods with filters, the feedback page
with sending a letter to the mail, etc.
The technologies described below are used in this project:
Back-end - ModX Revo;
Front-end – Fenom;
Database – MySQL;
Web server - apache with nginx.
BACK-END DEVELOPER / MAKEBECOOL
May 2015 - Jul 2015
Online-antalya. This project is casual site with blog, articles and common
information.
The technologies described below are used in this project:
Back-end - ModX Revo;
Front-end – Fenom;
Database – MySQL;
Web server - apache with nginx.
FULLSTACK DEVELOPER / MAKEBECOOL
Feb 2015 - Sep 2015
eComlogic CRM. This project is layer between shopify and store
eComlogic CRM (RetailCRM).
The technologies described below are used in this project:
Back-end –Laravel;
Front-end - React and Redux, Shopify Polaris Component;
Database -MySQL dev version, MariaDB production;
Web server - nginx with https;
other utils libraries - mashape/unirest-php for send
request to shopify api, retailcrm/api-client-php - for send.
request to eComlogic.
FULLSTACK DEVELOPER / MAKEBECOOL
Jan 2015 - Mar 2015
Poly-dveri. This project is simple online store where you can find all that
you need for your home.
The technologies described below are used in this project:
Back-end - ModX Revo;
Front-end – Fenom;
Database – MySQL;
Web server - nginx.
TEAM LEADER / BACK-END DEVELOPER /
OLYMPIAD WORK
2014 – 2014
Sagaidachnie path. Application for patriotism and education ukrainian
students. I have developed architecture of application, API layer and deploy
web-site in vps hosting on nginx.
The technologies described below are used in this project:
Back-end - NodeJS, Express Framework;
Front-end – Angular;
Database - MongoDB with wrapper for NodeJS mongoose;
Cache – Redis;
Web server - nginx with https and proxy on two domain
api.sagaidachniepath.xyz and sagaidachniepath.xyz;
Unit test - Mocha on Chai;
other utils libraries - axios, bluebird, passport and etc.
FULLSTACK DEVELOPER / MY PERSONAL PROJECT
2014 – 2014
Electronic Queue. My project for university conference.
The technologies described below are used in this project:
Back-end - NodeJS, Express Framework;
Front-end – Angular;
Database - MongoDB with wrapper for NodeJS mongoose;
Cache – Redis;
Web server - nginx with https and proxy on two domain
api.sagaidachniepath.xyz and sagaidachniepath.xyz;
Unit test - Mocha on Chai;
other utils libraries - axios, bluebird, passport and etc.
EDUCATION
MASTER OF COMPUTER SCIENCE
PRYAZOVSKYI STATE TECHNICAL UNIVERSITY
2014 - 2018
