Viacheslav O., Senior Node.js/AWS Engineer

Experience

Tech Lead, Cryptocurrency payment system

January 2022 - Now
Description: Platform for implementation of cryptocurrency payments.
Responsibilities:

• New features development.
• Manage the databases.
• Serverless configuration.
• Manage ci/cd for our project.
• Test writing.

Technologies stack:

• Platform based on AWS and Azure Clouds and SingleStore.
  We use serverless to deploy our api to lambda functions and web3 for work with blockchain networks.
• NestJs, TypeScript, Web3, SingleStore, Jest
  
  

Tech Lead, Urban issues reporting platform

October 2020 - January 2022
Description: Platform with two web applications and IOS, Android mobile applications for watching the city situation with ability for user to create a notifications for other user on the map and dispatchers who can manage this notifications
Responsibilities:

• Project architecture on AWS and infrastructure.
• Manage the databases.
• Writing terraform script.
• Manage ci/cd for our project.
• New features development.
• Test writing.

Technologies stack:

• Platform based on AWS Cloud and MongoDB Cloud. We use terraform to deploy our setups and service configurations to them.
• NodeJs, Express, TypeScript, MongoDB, PostgreSQL, Redis, Jest

Backend Developer, Password manager

October 2019 - September 2020
Description: New password manager with ios, android, web application and browser extension. Backed based on microservice architecture and AWS services, with complex cryptography and high load abilities.
Responsibilities:

• Main part of the backed, work with client applications and cryptography.
• Manage the databases.
• Writing golang proxies for communication between our services.
• Writing docker images.
• Manage ci/cd for our project.
• Test writing.

Technologies stack:

• NestJs, TypeScript, GoLang, PostgreSQL, Redis, Docker, Gitlab ci/cd

Backend Developer, Analytics dashboards

November 2018 - September 2019
Description: Analytic dashboards system to introducing events statistic of big product. Based on aggregations for Clickhouse table with tens millions of events and websocket technology.
Responsibilities:

• Backend services on NodeJs.
• Frontend on Vue.
• Project architecture.
• Manage the databases.
• Writing complex aggregation requests to introduce proper analytic.
• Writing docker images.
• Manage ci/cd for our project.

Technologies stack:

• Express, GraphQL, Vue, Websockets, Clickhouse, Redis, PostgreSQL, RabbitMQ

Backend Developer, Mailing system

September 2017 - October 2018
Description: Mailing service for big product with millions of active users and ability to schedule and run scalable marketing campaigns.
Responsibilities:

• New features development.
• Manage the databases.
• Setting up and monitoring marketing campaigns.

Technologies stack:

• Express, TypeScript, Redis, PostgreSQL, RabbitMQ

Full stack PHP Developer, MetaProject

June 2015 – August 2017

• Backend for an Israeli taxi application
  Laravel, PostgreSQL
• App for Ukrainian jurists, to keep an on lawsuits and court hearings.
  Java, PostgreSQL
• Backend for delivery service
  Laravel, Vue, MySQL, C++
• Site for subscription on technical support
  Laravel, Vue, MySQL
• Api for android and ios apps for couriers and clients who needs express delivery
  Laravel, Vue, Vuex, MySQL
• Site for booking procedures in beauty salons
  Yii2, JS/Jquery, MySQL
• Site for travelers, with the ability to pave the route, getting the list of hotels, campings, interesting places on it, and book hotels, cars, other...
  CakePHP, JS/Jquery, MySQL
• System for getting an hourly list of facebook marketing campaign data and match it with weather data.
  PHP, JS, MongoDB

Education

European University , Odessa, Ukraine
Business Economics and Law
2008 - 2013