Volodymyr – Spring, Java, Node.js

Plugin for syncing illustrator images and online store product cards (in admin panel).

• Implemented login functionality, fetch collections, back-end fetch products, and views
• Synced illustrator artboards with backend data

A chatbot based on AI which replies to clients requests on e-commerce websites.

• Integrated with Open AI API
• Setup Spring boot, Spring security
• Developed REST API, admin panel
• Converted Figma to React
• Deployed front-end and back-end

This is a crypto gaming platform which hosts multiple simple games like random dice. Users can bid and win using crypto.

• Setup back-end
• Integrated with Solana crypto network
• Implemented SOL top-up, withdrawal flows
• Implemented virtual crypto wallets
• Developed front-end: login, signup, top, withdraw flows, game start, game finish, win flow, etc
• Deployed to AWS

A software architecture modeling tool which does security vulnerability analysis and recommendations.

• Сreated a frontend for modeling software architecture
• Created a module for the analysis of software architecture
• Developed reporting

The service connects cities for everyone in a sustainable, smart, and fun way.

• Created microservices for renting a vehicle
• Calculated a price-based trip duration
• Implemented authentication
• Estimated tasks
• Set up a code review process
• Managed team

Embedded software for trains’ announcements, devices diagnostics, etc.

• Created microservices for device diagnostic, passenger announcements, camera feeds
• Clarified requirements with the customer,
• Created tasks for team members
• Did code reviews

The project's goal was to reduce the data processing time to 2 hours instead of 36.

• Implemented workflow using Java, Google Guice, and AWS Lambda
• Wrote unit tests
• Wrote cloud formation
• Implemented handlers to process DQL

The system provides a security risks analysis by the company's public domain. It shows all company's subdomains and all ports opened at those subdomains. The system also specifies what software the company uses at those ports/subdomains and so on. As a result, users get a detailed report of the security scans and security scores.

• Developed backend from scratch
• Designed system
• Integrated with 5+ 3rd party services
• Improved app performance using concurrency
• Wrote documentation and unit tests

The project is similar to Coursera but for schools and organizations. It is a multitenant SaaS.

Volodymyr was responsible for the whole back-end from scratch:

• Set up deployment process using AWS EC2
• Developed appointment module
• Set up video conference solution for instructors & employees
• Implemented basic user flows

A solution for the bank that allows sending confirmation SMS to their clients. The most important thing on this project was related to clients' data protection.

Volodymyr developed backend from scratch. Mainly, the project was related to API integration with 3d party service providers. Each API had 2-3 layers of data encryption.

Social Network for people loving cooking, where they can share recipes, leave comments for others' recipes, upload photos of already cooked food, and so on.

• Added new features
• Fixed bugs
• Deployed new changes
• Debugged and resolved the application issues
• Wrote unit, integration, and E2E tests