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nazar_ee

Nazar K

@nazar_ee

Backend Engineer

Ukraine
Anglais, Ukrainien
Certaines informations sont présentées en anglais.
À propos de moi
I'm a Python Backend Engineer with 4+ years of commercial experience and 50+ delivered software solutions. I specialize in REST APIs, Telegram bots, business automation, payment systems, and third-party integrations. My main stack includes Python, FastAPI, asyncio, aiogram, PostgreSQL, Redis, SQLAlchemy, and Docker. I can take a backend project from requirements and architecture through implementation, deployment, and ongoing support. I value clear communication, realistic deadlines, maintainable code, and client confidentiality.... Plus d’infos

Compétences

n
nazar_ee
Nazar K
hors ligne • 
Temps de réponse moyen de 1 heure

Voir mes services

Chatbots réglementés
I will build a custom telegram bot with python
De90 $US / projetPlus de détails

Portfolio

Expérience professionnelle

Lead Backend Engineer / Founder

QuaronSoftware • Indépendant

Aug 2025 - Present • 1 yr 3 mos

Responsible for backend architecture and core APIs Focused on scalability, reliability, and stability Managed deployments and production support

Freelance

Freelance

Freelance • Freelance

Feb 2022 - Present • 4 yrs 9 mos

Developed 50+ production backend and automation systems Built async Python backends with PostgreSQL and Redis Integrated external APIs and messaging platforms

Google

Middle Python Backend Engineer

Google • Freelance

Apr 2024 - Oct 2025 • 1 yr 6 mos

Owned development, deployment, and production support of the core asynchronous Python backend, integrating multiple blockchain networks. Implemented application-level per-address locking, transaction-state tracking, and confirmation checks to coordinate concurrent operations, with scheduled retries for failed or timed-out operations. Developed advertising attribution and social-platform integrations for conversion tracking, session management, and API-based automation. Resolved event-loop blocking in a legacy integration by moving long-running synchronous I/O to threads, keeping asynchronous services responsive during external calls.