Денис

DENYS
KINDII
SENIOR PYTHON DEVELOPER

SKILLS
BackEnd
Python - 5 years
Fast API - 5 years
Django - 3 years
Flask - 3 years
REST API design (OpenAPI / Swagger)
Async IO (asyncio, aiohttp)
Background jobs (Celery, RQ, Dramatiq)
Authentication & Authorization
JWT
OAuth2
Node.JS
CONTACT NestJS - 0.5 year
FrontEnd
[відкрити контакти](див. вище в блоці «контактна інформація») HTML/CSS/JS/TS - 2 years
React JS - 0.5 year
[відкрити контакти](див. вище в блоці «контактна інформація») Redux - 0.5 year
Database
Ternopil. Ukraine. SQL
PostgreSQL/MySQL/MariaDB - 5 years
NoSQL
Redis - 2 years
MongoDB - 1 year
LANGUAGE DevOps
Linux
English B1 - B2 Ubuntu/Debian/CentOS - 5 years
Windows - 1.5 year
Ukrainian
Serverless - 2 years
Kubernetes - 2.5 years
Docker - 3.5 years
CI/CD
Web3
web3-py - 3.5 years
solidity - 0.5 year
AI
RAG / AI integration / Computer Vision
Other
Crypto ATM (BATM) - 0.5 year
Async - 4 years
Multiprocessing/Multithreading - 3 years
Microservices - 3.5 years
 WORK EXPERIENCE

Ritofos Co. (outsourcing startup)
Software Engineer – Remote, Ukraine 10.2020 – 02.2022
Worked on multiple projects ranging from Telegram bot creation and backend services to Web3 integrations and
blockchain-based payment systems (TRC & BEP20).
Key Achievements:
Developed blockchain payment service with TRC & BEP20 network integration.
Built automation scripts and backend APIs for Telegram bots using Django, Flask, and FastAPI.
Designed and optimized databases (MySQL, PostgreSQL, MongoDB) ensuring performance under high load.
Tech Stack: SQL (MySQL, PostgreSQL), MongoDB, Telegram API, Web3, Flask, FastAPI, Django, HTML/CSS, Jinja2,
Aiogram, asyncio, threading, Selenium, memory optimization.

Perevozka Delivery (Small Logistic Business)
FullStack Developer – Ivano-Frankivsk, Ukraine 05.2022 – 02.2023
Led the full-cycle automation of a small logistics business, from website development to business logic implementation.
Key Achievements:
Developed a full-service website, parcel tracking system, chatbot, and admin panel.
Integrated LiqPay payment system and automated order processing.
Migrated project to a new development team with full technical documentation.
Tech Stack: SQL, NoSQL, Aiogram, Django, FastAPI, Google API, AWS, Docker, Celery, async, Swagger, React, Jinja2,
LiqPay.

Product Company (Crypto startup)
Software Engineer – Remote, Ukraine 04.2023 – 03.2024
Worked on diverse services including automation tools, websites, bots, Telegram apps, scraping systems, and mobile
games.
Joined an existing education platform project connecting private tutors, institutions, and students.
Key Achievements:
Developed automation scripts for large-scale data processing and integration.
Built mobile apps using React Native and integrated with backend APIs.
Created scalable backend services with Django ORM, SQLAlchemy, and Tortoise ORM.
Tech Stack: SQL, NoSQL, Migrations, SQLAlchemy, Tortoise ORM, Django ORM, React Native, FastAPI, Celery, Docker,
Kubernetes, React, Web3, Aiogram, PyTest.

UpStaff (NDA, Outstaffing)
Backend developer – Remote, Ukraine 04.2024 – 09.2024
Created a Telegram mini-app from scratch with Web3 payment integration, admin panel, and automation tools for over
1M users.
Key Achievements:
Developed Web3 payment flows and connected them to in-app functionality.
Implemented automation for AirDrop campaigns and user engagement.
Produced complete documentation and system diagrams for project handover.
Tech Stack: SQL, Migrations, SQLAlchemy, Tortoise ORM, React, FastAPI, Celery, Docker, Web3, Aiogram, PyTest, Redis,
REST API, Cybersecurity, DDoS protection.

WeFi
Software Engineer – Remote, Kyiv/Dubai 10.2024 – 01.2026
Focused on Web3 loyalty system development and backend engineering, including server infrastructure setup and
crypto ATM (BATM) operations.
Key Contributions
Integrated blockchain-based loyalty systems into production.
Developed backend services with Django, DRF, Django Ninja, FastAPI, and NestJS.
Implemented large file processing and high-volume data transfer pipelines.
Built Telegram bots for automation and operational workflows.
Deployed and maintained services using Docker, Serverless, and Linux (Ubuntu).
Key Skills
Python, Django, DRF, Django Ninja, FastAPI, NestJS, Web3, NVIDIA CUDA, Large File Processing, Data Streaming, Docker,
Serverless, Linux (Ubuntu), VPN, Telegram Bots, Crypto ATM (BATM), RAG
 🏆 KEY ACHIEVEMENTS
1. 🥇 Reached the Top 10 Python freelancers in Ukraine on Freelancehunt at just 17 years old,
showcasing early talent and initiative.
2. 🌍 Worked on projects with a multi-million user base, contributing to scalable architecture and
high-load system stability.
3. 🚀 Successfully launched an educational platform in the USA, now actively used by students,
tutors, and academic institutions.
4. 🌐 Represented our development team at the international Wefi Beyond Banking Summit,
delivering a product presentation to a global fintech audience.
5. 🚀 Led the refactoring and migration of a monolithic Django system serving 2M+ monthly
active users into a fault-tolerant microservices architecture on AWS, reducing API latency by
45%, achieving, and enabling zero-downtime deployments.

EDUCATION

"Ternopil Professional College"
of Ternopil Ivan Puluj National Technical University
Bachelor of Computer Engineering
2019-2023

Ternopil Ivan Puluj National Technical University
Automatizaion
2023-2026