Senior Python Engineer (Flask)

We are looking for a Senior Python Engineer — who has experience building scalable API services using Flask. This role is ideal for an engineer with deep technical expertise, strong skills in designing microservices and event-driven architectures, and a commitment to writing clean, testable code.

Project

A Sales Intelligence solution tailored for the B2B segment, actively used by Sales, Marketing, Operations, and Recruiting teams.

• Development started 1.5 years ago
• 1.5B+ data points processed and improved daily

Tech Stack

• Python, FastAPI (or Flask), SQLAlchemy
• PostgreSQL and NoSQL databases
• Kafka or other message brokers
• Docker, Kubernetes
• AWS, CI/CD, Pytest

• Clean Architecture, async/await

   

Responsibilities

• Design, develop, and maintain scalable backend services with REST APIs using FastAPI or similar frameworks.
• Architect and manage SQL (Postgres) and NoSQL databases.
• Write clean, modular, and testable code based on clean architecture principles.
• Implement unit and integration tests (e.g., Pytest) and support CI/CD pipelines.
• Work closely with frontend developers to ensure seamless integration.
• Collaborate with data engineers to optimize internal data platforms.
• Build and maintain event-driven systems using Kafka or similar.
• Containerize and orchestrate services with Docker and Kubernetes.
• Operate within AWS infrastructure and contribute to DevOps practices.

Requirements

• 5+ years of backend development experience with a strong focus on Python
• 1+ years with Flask and async programming.
• Solid experience with SQLAlchemy or other ORM tools
• Strong knowledge of both SQL and NoSQL database design and optimization
• Practical experience in microservices and event-driven systems
• Understanding of clean architecture and best practices in code quality
• Experience with Dockerized environments
• Familiarity with AWS and DevOps practices is a plus
• Strong problem-solving skills and independence in a startup environment
• Passion for technology and continuous learning

What we offer

• Hybrid work format: 2 remote days + 3 in-office days per week.
• A modern office environment in the heart of Kyiv
• Medical insurance
• 5 paid sick days + flexible work schedule
• 20 vacation days
• Team-building activities
• Happy hours, snacks & drinks
• Option to reschedule workdays when needed