Upstaff Sign up
Viacheslav O.
🇺🇦Ukraine (UTC+02:00)
Created AtUpstaffer since September, 2022

Viacheslav O. — Senior Node.js/AWS Engineer

Expertise in Back-End Web.

Last verified on July, 2023

Core Skills

Bio Summary

- More than 6 years of professional experience in the backend development
- Proficiency at application architecture principles (including SOLID / DDD / DRY / KISS)
- Understanding and efficient usage of design patterns
- Project / tasks estimation (concept based, milestone, roadmap, detailed)
- Agile / Scrum / Kanban (both team management & development)
- Test-driven development (real unit- & acceptance- tests usage everyday)
- High load optimization (both game backend and enterprise system solutions)
- Upper-Intermediate English.
- Available ASAP.

Technical Skills

Programming LanguagesGo, JavaScript, PHP, TypeScript
.NET PlatformAzure
JavaScript FrameworksExpress, NestJS, Node.js, Vue.js
Databases & Management Systems / ORMClickhouse, MongoDB, MySQL, PostgreSQL, Redis, SingleStore
Cloud Platforms, Services & ComputingAWS, Azure
Message/Queue/Task BrokersApache ActiveMQ, RabbitMQ
Collaboration, Task & Issue TrackingAtlassian Confluence, Jira
Virtualization, Containers and OrchestrationDocker, Terraform
Version ControlGit, GitLab
SDK / API and IntegrationsGraphQL
QA, Test Automation, SecurityJest
BlockChain and Decentralized SoftwareWeb3
Mail / Network Protocols / Data transferWebSockets

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

How to hire with Upstaff

1

Talk to Our Talent Expert

Our journey starts with a 30-min discovery call to explore your project challenges, technical needs and team diversity.

2

Meet Carefully Matched Talents

Within 1-3 days, we’ll share profiles and connect you with the right talents for your project. Schedule a call to meet engineers in person.

3

Validate Your Choice

Bring new talent on board with a trial period to confirm you hire the right one. There are no termination fees or hidden costs.

Why Upstaff

Upstaff is a technology partner with expertise in AI, Web3, Software, and Data. We help businesses gain competitive edge by optimizing existing systems and utilizing modern technology to fuel business growth.

Real-time project team launch

<24h

Interview First Engineers

Upstaff's network enables clients to access specialists within hours & days, streamlining the hiring process to 24-48 hours, start ASAP.

x10

Faster Talent Acquisition

Upstaff's network & platform enables clients to scale up and down blazing fast. Every hire typically is 10x faster comparing to regular recruitement workflow.

Vetted and Trusted Engineers

100%

Security And Vetting-First

AI tools and expert human reviewers in the vetting process is combined with track record & historically collected feedbacks from clients and teammates.

~50h

Save Time For Deep Vetting

In average, we save over 50 hours of client team to interview candidates for each job position. We are fueled by a passion for tech expertise, drawn from our deep understanding of the industry.

Flexible Engagement Models

Arrow

Custom Engagement Models

Flexible staffing solutions, accommodating both short-term projects and longer-term engagements, full-time & part-time

Sharing

Unique Talent Ecosystem

Candidate Staffing Platform stores data about past and present candidates, enables fast work and scalability, providing clients with valuable insights into their talent pipeline.

Transparent

$0

No Hidden Costs

Price quoted is the total price to you. No hidden or unexpected cost for for candidate placement.

x1

One Consolidated Invoice

No matter how many engineers you employ, there is only one monthly consolidated invoice.

Ready to hire Viacheslav O.
or someone with similar Skills?
Looking for Someone Else? Join Upstaff access to All profiles and Individual Match
Start Hiring