Vladimir is available for hire
Hire VladimirVladimir Ovchinnikov
Verified Expert in Engineering
Software Developer
Torzhok, Tver Oblast, Russia
Toptal member since June 24, 2022
Bio
Vladimir has been a professional full-stack developer since 2009. He has architected complex software systems and is experienced with relative databases and cloud computing. He also has extensive expertise in a wide area of software development, including desktop applications, high-load servers, and hybrid mobile applications.
Portfolio
Eletive
React, Node.js, GraphQL, PostgreSQL, SQL, MySQL, Azure, Slack API...
Legalink.Tech
JavaScript, Django, PostgreSQL, Python, SQL, REST
Zortee
Node.js, React, Shopify, Vue, JavaScript, SQL, Single Sign-on (SSO)...
Experience
- JavaScript - 12 years
- SQL - 12 years
- Amazon Web Services (AWS) - 7 years
- Node.js - 7 years
- GraphQL - 6 years
- Python - 5 years
- React - 4 years
- PostgreSQL - 3 years
Availability
Part-time
Preferred Environment
WebStorm, Slack, DataGrip, pgAdmin
The most amazing...
...thing I've done is migrate a MySQL database with numerous functions and trigger logic to PostgreSQL.
Work Experience
Full-stack Developer
2018 - PRESENT
Eletive
- Developed the back end, including a GraphQL API, SCIM integration API, database schema and logic, authorization, Slack, and Teams integrations.
- Tracked and fixed bugs using Jira as a reporting tool.
- Migrated MySQL database to PostgreSQL to solve performance problems.
- Participated in developing a React component library for the custom design of applications.
- Participated in developing the front-end part of an application.
Technologies: React, Node.js, GraphQL, PostgreSQL, SQL, MySQL, Azure, Slack API, Microsoft Teams, JavaScript, TypeScript, SCIM, Single Sign-on (SSO), JSON Web Tokens (JWT), React Native, Google Cloud, REST, Amazon Web Services (AWS)
Full-stack Developer
2020 - 2022
Legalink.Tech
- Participated in developing Office365 Word add-on for providing extra functionality when working with legal documents.
- Tracked and fixed bugs using Jira as a reporting tool.
- Participated in developing a Django back-end REST API working with the PostgreSQL database.
Technologies: JavaScript, Django, PostgreSQL, Python, SQL, REST
Full-stack Developer
2018 - 2022
Zortee
- Developed Zortee's store website as part of a team of three developers.
- Developed Shopify add-on Quest Hunt. (https://apps.shopify.com/quest).
- Developed Shopify add-on Lucky Leads. (https://apps.shopify.com/sale-spinner).
- Developed Shopify add-on Quiz Deals (https://apps.shopify.com/quiz-deals).
Technologies: Node.js, React, Shopify, Vue, JavaScript, SQL, Single Sign-on (SSO), JSON Web Tokens (JWT), REST, Amazon Web Services (AWS)
Full-stack Developer
2017 - 2019
Royal ride
- Developed an application for ride-booking using Google cloud function and Firebase as back end.
- Built a ride-booking application with Vue for a client.
- Created a hybrid ride-booking application with Ionic for a client.
- Developed a chatbot system that allows extending different messengers with a single core logic.
- Created adapters for most popular messengers like Skype, Messenger, Telegram, and WhatsApp.
Technologies: JavaScript, Vue, Vuetify, Firebase, Google Cloud, Ionic, Google Maps
Full-stack Developer
2016 - 2018
Electronic Creations
- Developed an email marketing application when leading a team of four developers.
- Architected AWS-based infrastructure to allow customers to register their domain and emails for sending emails.
- Created Python serverless functions for implementing scheduled sending logic.
Technologies: JavaScript, Angular, MySQL, GraphQL, Python, SQL, Single Sign-on (SSO), JSON Web Tokens (JWT), Amazon Web Services (AWS)
Full-stack Developer
2015 - 2016
Brand Trinity
- Developed a platform for search cases of content owner rights abuse and illegal use of content.
- Created a system for tracking peers that upload illegally using content.
- Built web and API scrappers that search for illegal use of content.
Technologies: Python, PHP, JavaScript, Scraping, SQL, MySQL, Single Sign-on (SSO), REST, Amazon Web Services (AWS)
Full-stack Developer
2015 - 2016
SohoSub
- Developed a web application that allows customers to hire translators and them to be hired to translate subtitles.
- Created a system for secure money transactions between the application users using Escrow functionality.
- Developed an AWS-based multimedia decoding platform. It allows the creation of video content with minimal quality and a forensic watermark.
Technologies: PHP, MySQL, JavaScript, Python, Video Encoding, SQL, Single Sign-on (SSO), REST, Amazon Web Services (AWS)
Full-stack Developer and Senior IT Engineer
2011 - 2015
Institute for The Development of Energy Efficient Technologies
- Developed a SCADA system for collecting data on energy use from counters.
- Created a converter from the file format of Testo 875-2 to report an image extended with a heat map.
- Built a simple native application for billing customers.
- Developed an add-on for a geo-information system that allows getting public data to map. Like satellite images, addresses, heights, and more.
- Created a tool that was using during migration to replicate the MS Access database to MySQL.
- Built a tool that calls phone numbers of remote devices by sending AT-commands to modem.
Technologies: MySQL, PHP, Apache, JavaScript, VBScript, Qt, C++, Reverse Engineering, SQL, SQLite, REST
Senior IT Engineer
2007 - 2011
Sberbank
- Developed administrative and automation tools with Bash for SCO Unix and VBScript for Windows and ActiveDirectory.
- Managed various SCO Unix servers. Supported MSSQL server.
- Administrated overall network, security, and access.
Technologies: VBScript, Microsoft SQL Server, Unix, Bash, SQL
Experience
Royal Ride
Progressive web apps (PWA) and hybrid applications for a client. It allows ordering a taxi and other rides like buses and limos. Partners can manage drivers and rides, and drivers operate rides and ride routing.
It has a Google Firebase and Google cloud functions in the back end, and I used Vue and Vuetify.js in the front end.
It has a Google Firebase and Google cloud functions in the back end, and I used Vue and Vuetify.js in the front end.
eCampaignHub
An email marketing web application for third-party clients. A GraphQL API based on AWS API gateway and Lambda with Node.js.
I scheduled tasks based on AWS Lambda using Python and administrated the entire web application. A client documentation application based on MarkDown syntax.
I scheduled tasks based on AWS Lambda using Python and administrated the entire web application. A client documentation application based on MarkDown syntax.
Brand Trinity
Developed an AWS Lambda-based search engine for scraping data from various resources, search abusing of client content, and machine-learned scoring of results.
A web application for managing a search system.
A web application for managing a search system.
Sohosub
Built a complex web application for creating and editing subtitles based on video content. Also, it is a freelancing platform for owners, subtitlers, translators, and editors.
The video protection part was the main point. The back-end's subsystem is in Python to prepare video sources like watermarks and encoding for users.
The video protection part was the main point. The back-end's subsystem is in Python to prepare video sources like watermarks and encoding for users.
Carder
An application for image processing and recognition.
It allows to obtain images from a file or image scanner and process them with image recognition for specific objects. The goal is to identify and summarize the number of objects. Used C++ and Qt framework.
It allows to obtain images from a file or image scanner and process them with image recognition for specific objects. The goal is to identify and summarize the number of objects. Used C++ and Qt framework.
SCADA
A SCADA system. Linux server daemon in C++ and Qt that receives data from remote devices with a web-based interface (PHP) for reporting and monitoring.
MySQL database for storing data and reverse engineering a private protocol.
MySQL database for storing data and reverse engineering a private protocol.
Testo 875-2
A simple tool written in C++ with Qt framework. A converter from file format of Testo 875-2 to image with the insertion of information about temperature gradient.
Reverse engineering of a private file format.
Reverse engineering of a private file format.
Skills
Libraries/APIs
Node.js, React, Vue, Slack API, Google Maps
Tools
Slack, WebStorm, DataGrip, pgAdmin, Apache, Microsoft Teams
Languages
JavaScript, SQL, GraphQL, Python, PHP, VBScript, Bash, C++, TypeScript, Rust
Paradigms
REST
Platforms
Amazon Web Services (AWS), Linux, Unix, Shopify, Firebase, Azure
Storage
PostgreSQL, MySQL, Google Cloud, Microsoft SQL Server, SQLite
Frameworks
Vuetify, Bootstrap, Qt, JSON Web Tokens (JWT), Django, Angular, Ionic, React Native
Other
PWA, Scraping, Reverse Engineering, SCIM, Single Sign-on (SSO), Cordova, BrainTree, Image Recognition, Video Encoding
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