
Vasyl
From Ukraine (UTC+3)
14 years of commercial experience
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Vasyl – Node.js, PostgreSQL, MongoDB
A bold master of code and a talented back-end developer, Vasyl is a quiet genius whose modesty belies his profound confidence in his skills. With deep experience in Node.js and mastery of frameworks, he demonstrates an impressive ability to tackle tasks even in the most challenging situations. His capacity to adapt quickly and work both collaboratively and independently makes him a valuable asset for any project. Even in interpersonal interactions, he proves to be adept, facilitating high-quality and productive exchanges of ideas.
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Let’s get started today!Experience Highlights
Senior back-end developer
Platform providing web and mobile applications for interacting with multi- chain cryptocurrencies and NFTs
- Contributed to breaking a monolithic service into microservices.
- Developed a transaction service with an admin panel to interact with the EVM blockchains and manage transaction statuses.
- Integrated the Moralis API for handling NFT data.
- Built a coin service to manage cryptocurrency historical data and account balances, integrating CoinGecko API and QuickNode API.
- Contributed to services related to the Invisible Wallet functionality.
- Implemented login functionality via Apple OAuth.
- Built an auth library for JWT verification and published it via GitHub Packages.
- Integrated linting tools and static application security testing (SAST) tools into the CI/CD pipeline.
Senior Back-End Web Developer
An application that collects and aggregates information about companies. It searches companies' information in several vendors, merges it, and allows to generate reports with company profiles and its member's data. Know Your Business (KYB) service.
- Developed core part of the application;
- Developed API to generate PDF, ZIP files;
- Integrated telemetry services;
- Developed pages to show company-related information;
- Released application versions.
Senior Back-End Web Developer
A collaboration platform that allowed organizations to manage their documents and interact with customers and government services.
- Designed, developed, documented, and supported new microservices;
- Tested and troubleshot the application;
- Transferred functionality from .NET monolith server application to Node.js microservices;
- Developed application for generating microservices scaffold;
- Integrated third-party services;
- Updated CI/CD flows;
- Released platform versions;
- Mentored team members.
Senior Back-End Developer
The system serves butcher shops and other produce stores. It has a webshop platform that allows configuring online ordering. It has an order kiosk that helps customers easily and quickly enter their orders in a store. It has software for the configuration and generation of bar codes. Also, it has a dashboard for handling charges, customers, etc.
- Developed core part of the new version;
- Integrated Zebra printer;
- Implemented service for handling barcodes structure (via ZPL language).
Back-End Web Developer
The platform provides a game where participants assemble virtual teams composed of proxies of real players of professional soccer leagues. These teams compete based on the statistical performance of those players in actual games.
- Developed back-end features;
- Developed Twitter bot;
- Developed admin panel features on front-end and back-end;
- Integrated monitoring system with Slack bot.
Back-End Web Developer
The platform helps businesses customize a last-mile delivery solution to provide the best service to their customers. On the other hand, it helps the courier community to grow their business by picking up shifts, scheduled jobs, or on-demand deliveries.
- Developed microservices for mobile API;
- Developed microservice for bundling orders in shift run (estimate and bundle food orders into driver routes);
- Developed microservice for providing external API usage;
- Implemented integration with Google Directions API.
Tech lead, Back-End Web Developer
Mobile application that interactively provides the leading services in order to ease the life of Telecommunications Regulatory Authority customers.
- Developed core part of the system;
- Developed mobile API;
- Integrated with Microsoft Dynamics CRM;
- Set proxy library on C#;
- Developed markup meta-language for mobile dynamic views;
- Developed admin panel;
- Released application.
Back-End Web developer
Mobile application that provides kinds of games that are based on beacons and connected to mall stores. It allows you to accumulate loyalty points, find great deals, redeem awesome prizes, and participate in fantastic competitions.
- Developed core part of the system;
- Developed mobile API;
- Developed admin panel;
- Developed a points system to receive and redeem prizes;
- Implemented integration with beacons.