Volodymyr – Java, Spring, Node.js

Reusable takeout solution that helps colleges meet sustainability goals with ease.

• Created admin invitation functionality;
• Redesigned admin dashboard;
• Optimized API latency;
• Fixed stripe integration issues.

An AI chatbot that replies to clients' requests on e-commerce websites.

• Integrated with Open AI API;
• Set up Spring boot, Spring security;
• Developed REST API, admin panel;
• Converted Figma to React;
• Deployed the 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.

• Set up the back end;
• Integrated with Solana crypto network;
• Implemented SOL top-up and withdrawal flows;
• Implemented virtual crypto wallets;
• Developed the 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 front end for modeling software architecture;
• Created a module for the analysis of software architecture;
• Developed reporting functionalities.

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 the code review process;
• Managed the team.

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

• Created microservices for device diagnostics, passenger announcements, and camera feeds;
• Created tasks for team members;
• Conducted 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 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 the back end from scratch;
• Designed the 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.

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