Heorhii

Heorhii Priadkin
Fullstack Developer

Kolomyia, Ukraine | Remote

Email: [відкрити контакти](див. вище в блоці «контактна інформація») | Portfolio: https://priadk.in | GitHub: https://github.com/glad1olus86
| LinkedIn: [відкрити контакти](див. вище в блоці «контактна інформація») | Telegram:
https://t.me/mjadapter

PROFESSIONAL SUMMARY

Full-Stack Software Developer with 2+ years of commercial experience designing, building, and
deploying production-grade SaaS platforms, CRM/ERP systems, and AI-powered business
automation. Expert in backend architecture using PHP, Laravel, Node.js, and Python, combined
with modern frontend development in React, Next.js, and React Native. Proven track record of
shipping 18+ business modules within a multi-tenant SaaS platform, integrating 30+ third-party
APIs including payment gateways, and implementing AI/OCR pipelines with Google Gemini and
OpenAI. Strong in RESTful API design, relational database modeling, role-based access control,
queue-based background processing, and mobile-adaptive UI development. Daily driver of AI
coding agents (Claude Code, OpenAI Codex, Cursor, GitHub Copilot) to accelerate delivery while
maintaining code quality through rigorous review.

TECHNICAL SKILLS

Programming Languages: PHP, JavaScript, TypeScript, Python, Java, Kotlin, C#, SQL, HTML5, CSS3

Frontend: React, Next.js, React Native, Tailwind CSS, Framer Motion, Blade, jQuery, Vite,
Responsive Design, Single Page Applications (SPA), Server-Side Rendering (SSR)

Backend: Laravel 11, Node.js, Express.js, ASP.NET Core, Spring Boot, FastAPI, RESTful APIs, API
Integration, WebSockets, Queue Workers, Background Jobs

Databases: MySQL, PostgreSQL, MariaDB, Redis, Eloquent ORM, Database Design, Query
Optimization, Migrations

DevOps and Tooling: Docker, Git, GitHub, Nginx, Linux VPS, CI/CD, npm, Composer, Version
Control

AI Coding Agents and Developer Tools: Claude Code (Anthropic CLI agent), OpenAI Codex (CLI
agent), Cursor IDE, GitHub Copilot, Gemini CLI, Aider, agentic workflows, multi-file refactoring,
codebase-aware development, AI-assisted code review, prompt engineering, CLAUDE.md /
AGENTS.md context design. AI and LLM APIs: OpenAI API, Google Gemini API, Claude API
(Anthropic SDK), LLM function calling, structured outputs, tool use, Optical Character
Recognition (OCR), Retrieval-Augmented Generation (RAG)

Third-Party Integrations: Stripe, PayPal, Razorpay, Mollie, YooKassa, Flutterwave, Paystack,
Authorize.Net, Twilio SMS, Zoom API, Telegram Bot API, Google Calendar, DeepL API, Odorik
SMS

Architecture and Methodologies: Multi-tenant SaaS Architecture, Role-Based Access Control
(RBAC), Observer Pattern, State Machines, Event-Driven Architecture, Double-Entry Accounting,
Queue-Based Async Processing, Audit Logging, Modular Architecture, Agile, Scrum, Code
Review, Unit Testing, Feature Testing

WORK EXPERIENCE

Fullstack Software Developer

LamaPixel (Aspector) | Remote | November 2025 - Present

- Designed and shipped 18+ business modules for Jobsi, a multi-tenant SaaS ERP/CRM platform
for staffing agencies, including Human Resource Management (HRM), Customer Relationship
Management (CRM) with Kanban pipelines, Finance with double-entry accounting, hierarchical
Cashbox, Projects with time tracking, Fleet Management with GPS tracking, Recruitment with
form builder, Point of Sale (POS) with warehouse management, and Document Generator.

- Integrated 30+ payment gateways including Stripe, PayPal, Razorpay, Mollie, YooKassa,
Flutterwave, and Paystack to support global SaaS billing across multiple regions.

- Implemented an AI-powered OCR pipeline using Google Gemini API to batch-process
passports, receipts, and vehicle documents (up to 20 items per request), significantly reducing
manual data entry for end users.

- Developed a token-based billing system backed by Stripe for metered AI-scan consumption,
including token balance, transactions, orders, and configurable pricing.

- Built a dedicated mobile-adaptive UI layer with Blade templates and Tailwind CSS without an
SPA framework, featuring bottom-sheet modals and collapsible sections for one-handed
usability.

- Localized the platform into 5 languages (Russian, English, Ukrainian, Polish, Czech) using JSON
and PHP dictionaries.

- Designed Infinity SPA Ecosystem: a production-grade 3-role CRM (Admin, Operator, Masseuse)
with isolated RBAC permissions, synchronized bidirectionally via REST API with a public
WordPress booking website for a Czech market client.

- Implemented an end-to-end SMS verification flow via Odorik API with an async retry queue (3
attempts), phone-number normalizer, low-balance Telegram alerts, and full audit logging.

- Engineered state-machine order flow, operator shift system with real-time conflict resolution
for overlapping shifts, per-operator bonus rates, and localized Telegram notifications in Czech.

- Technologies: PHP 8.2, Laravel 11, MySQL, React Native, Blade, Tailwind CSS, WordPress, Redis,
Google Gemini API, Stripe API, Twilio, Zoom API, Google Calendar, Odorik SMS, Polylang, Spatie
Laravel Permission.

Freelance Software Developer

Self-employed | Remote | February 2025 - November 2025

- Delivered 11+ cross-platform projects across 4 environments (Android, Windows desktop,
Minecraft Java servers, web) using 5 programming languages, focusing on complex technical
challenges that required deep expertise.

- Developed AntiCorruption, a real-time audio, video, and GPS streaming system using Kotlin for
Android and the RTMP protocol, paired with a C# WPF desktop admin dashboard featuring live
map tracking and auto-recording. Stack: Kotlin, C#, WPF, MariaDB.

- Built BusinessGladiolus, a commercial Java plugin for Spigot/Paper Minecraft servers
implementing a full economic simulation with player businesses, WorldGuard-protected
territories, banking with loans and bankruptcy confiscation, anti-monopoly rules, and
government auctions with dynamic pricing. Stack: Java, Spigot/Paper, WorldGuard, Vault.

- Developed TranslateGladiolus, a commercial Java plugin for real-time Minecraft chat
translation via DeepL API supporting 11+ languages, with async processing, MySQL-backed 7-day
translation cache via HikariCP, and 8 granular access levels. Stack: Java, Spigot/Paper, DeepL API,
MySQL, HikariCP.

- Engineered CraftNova Launcher: a custom Minecraft launcher built from scratch using
Electron, Java, and Node.js, featuring integrated anti-cheat, server access control, auto-updates,
and a modern UI.

EDUCATION

Bachelor of Software Engineering

Dnipro University of Technology, Ukraine | 2024 - 2028 (expected)

LANGUAGES

Ukrainian (Native), Russian (Native), English (B1+)