Ihor N
Ihor N

Senior Python Software Engineer

Open to offers · Member since 27 Jul 2026
Message
Location
Barcelona, Spain
Desired salary
Unspecified
Work preference
Remote Only / Full Time
Experience level
Lead

About

Professional summary

I am a senior Python software engineer with extensive experience building backend systems, web applications, and scalable distributed architectures.

I have spent my career working across startups, product companies, fintech, e-commerce, real estate, and high-load platforms, often taking ownership of core backend services and delivery processes.

I enjoy building products from the ground up, improving legacy systems, and introducing clean architecture, DDD, TDD, microservices, and strong engineering practices that help teams move faster and ship reliably.

I have led teams, mentored engineers, and collaborated closely with CTOs, CEOs, DevOps, solution engineers, and cross-functional squads to deliver business-critical outcomes.

My technical background is centered on Python, Django, Flask, FastAPI, AWS, PostgreSQL, Redis, Docker, Kubernetes, and modern API and integration patterns, with additional experience in AI-enabled systems and cloud migrations.

I am based in Barcelona and open to opportunities where I can contribute as a senior or lead backend engineer, especially in environments that value ownership, technical quality, and product impact.

Skills

55 capabilities

Tech stack & tools

Working toolkit

Experience

Career history

Senior Backend Developer Maestrolabs Inc.

Built startup products from 0 to 1 within a few months and helped achieve top-10 placement in Microsoft App Store.

I owned the product end to end and reported directly to the CTO and CEO. I also helped deliver a fast and sustainable flow of new features that supported company growth.

I contributed to SOC-2 certification within six months and successfully supported renewals in subsequent years. My work emphasized serverless development, TDD, AI-driven features, and strong delivery discipline.

Lead Python Software Engineer Byrd Technologies

Led the Integration Team of five backend engineers while remaining about 50% hands-on. I worked closely with solution engineers to deliver new e-commerce integrations and support expansion into new countries.

I also helped the DevOps team migrate infrastructure from Heroku to AWS and set up CI/CD pipelines. This role gave me strong leadership experience in a fast-moving product environment.

I focused on microservices, TDD, pair programming, knowledge sharing, and regular planning practices to keep the team aligned and productive.

Senior Python Software Engineer Qustodio

Contributed to core engineering efforts for a high-load VPN-based parental control platform serving more than 10 million concurrent users.

I delivered clean-architecture refactoring for Django REST APIs and supported hybrid data layers including Redis, Postgres, and DynamoDB. I also helped establish DDD, TDD, and microservice foundations such as an authentication service.

I mentored junior engineers, collaborated across squads, and played a key role in DevOps and CI/CD rollout using Kubernetes, Helm, and AWS.

Lead Python Software Engineer Kvadom

Led a fully remote team consisting of backend, frontend, and DevOps engineers to rewrite a legacy Django monolith into a scalable microservices architecture with more than 15 services.

The platform supported a modern React-based real estate web application. I helped shape the technical direction and delivery process for the team.

I worked with microservices, DDD, TDD, quarterly planning, and SCRUM while guiding the team through a major modernization effort.

Senior Python Software Engineer QBeats

Developed and supported a high-load ad and paywall API and worked on an e-content paywall with fast payment processing and real-time content pricing.

I also added horizontal sharding by user region across a multi-cluster AWS Redshift setup.

This role strengthened my experience with high-traffic systems, data partitioning, and backend performance optimization.

Python Software Engineer Mobile Knowledge

Worked as a fullstack engineer and delivered a wide range of features including backoffice tools, withdrawal payments, call-taker workflows, taxi routing, and a real-time map dashboard for more than 80,000 vehicles.

I contributed across backend and frontend layers and worked in a product environment that required practical architecture and reliable delivery.

This role expanded my experience with business-facing systems, operational tools, and real-time interfaces.

Senior Software Engineer Marfin Bank

Worked as a fullstack engineer and migrated many legacy desktop banking applications into a modern Python web stack.

The delivered systems included client banking, digital signatures, backoffice tools, tariffs, and credit-related applications, all of which passed security audit certification.

This role gave me strong experience in regulated environments, security-sensitive software, and long-term modernization projects.

Software Engineer ICN

Developed an ERP web application for an internet provider, covering billing, network coverage maps, equipment status alerts, and issue tracking.

I worked on backend functionality and system integration for operational business needs.

This was an early role that helped me build a solid foundation in web development and enterprise software delivery.

Education

Learning history

Odessa National University I.I. Mechnikov

Master Degree, Physics, Experimental Physics and Semiconductor Electronics

Master's degree from the Physics Faculty, Department of Experimental Physics and Semiconductor Electronics.

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