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Achievement: Pair ExtraordinaireAchievement: QuickdrawAchievement: Pull Sharkx3Achievement: YOLO

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LionnoiL/README.md

Andrii Haponov — Java Developer

I build software that runs in real businesses: POS systems, Android apps for retail staff, Spring Boot services and integrations with 1C and retail hardware. 10+ years of business automation behind me, now focused on Java backend development.

Backend: Java 17/21 · Spring Boot · Spring Security (JWT) · Spring Data JPA · Hibernate · REST API · OpenAPI Databases: PostgreSQL · MySQL · MS SQL Server · Flyway Frontend: React · Vue 3 · TypeScript · Thymeleaf · HTMX Tools: Docker · AWS S3 · GitHub Actions · Maven · Git

Selected projects

Project What it is Stack
Kvitkovo Online flower shop — I designed and built the entire backend (~80 REST endpoints) Java 17, Spring Boot 3, Spring Security, MySQL, AWS S3
PetMarket Marketplace for pets and pet supplies — main backend contributor in a team of 3 Java 17, Spring Boot 3, Hibernate Search, MySQL
Time Tracker Time tracking web app, live Spring Boot, Thymeleaf, HTMX, PostgreSQL
POS Terminal Cashier workstation used at 7 checkouts in 3 supermarkets Java 17, Swing, JDBC
BAF Log to MSSQL Migrates 1C event logs to MS SQL Server and serves them over REST Spring Boot, REST API, SQLite, MS SQL

📧 wmconstructor@gmail.com · LinkedIn

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  1. baflogtomssql baflogtomssql Public

    Spring Boot service that migrates 1C (BAF) event logs from SQLite to MS SQL Server and exposes them via a REST API with search, filters and pagination.

    Java

  2. time-tracker time-tracker Public

    Web app for tracking time spent on projects and tasks, with reports and authentication. Spring Boot, Thymeleaf, HTMX, PostgreSQL. Live: time.haponov.pp.ua

    HTML

  3. petmarket petmarket Public

    Marketplace for pets and pet supplies, built by a team on the Team Challenge platform. Java 17, Spring Boot 3, Spring Security, Hibernate Search, MySQL, AWS S3.

    Java

  4. Kvitkovo/online_store Kvitkovo/online_store Public

    Online flower shop with a product catalog, bouquet builder, orders, delivery and payment options. Backend: Java 17, Spring Boot 3, Spring Security, Spring Data JPA, MySQL, AWS S3. Frontend: React, …

    Java 2 2

  5. posterminal posterminal Public

    Desktop POS application for retail stores: sales, returns, cash operations, integration with barcode scanners, receipt printers, customer displays, fiscal register and paymen terminals. Java 17, Sw…

    Java

  6. price_checker price_checker Public

    Android price checker for retail stores: scan a barcode to see the price, plays promo videos while idle. Java, Android SDK.

    Java