Senior Python Developer

Our client is an international product-based IT company specializing in the iGaming industry. Born in 2014, they rocked the CIS region, and now take the success to the world.

We are currently looking for a Python Developer to join the Core team.

👥 About the team:

The Core team is responsible for the mission-critical services of the platform: user management (IAM), financial transactions, anti-fraud, and event history.
We are actively decomposing a legacy monolith (Python/Tornado) and rewriting critical parts of the system using a modern tech stack.

📋 Key responsibilities and your contribution:

• Decomposing the monolith by extracting functionality from the Core service (Python 3.6+/Tornado) into microservices
• Developing and supporting services for transaction processing (a business-critical area)
• Designing asynchronous processes with RabbitMQ/Kafka
• Optimizing MongoDB (shared database antipattern) and migrating services to PostgreSQL
• Integrating with internal payment systems and external anti-fraud providers
• Refactoring heavily debt-loaded code (tech debt 9/10) and increasing test coverage (currently <20%)
• Building and optimizing server-side applications and microservices for processing data
• Setting up and maintaining integrations with external financial systems, payment gateways
• Writing unit tests, conducting integration testing, optimizing performance, and debugging code issues

📚 Your qualifications:

• 4+ years of experience with Python (working with both legacy and modern code)
• Strong knowledge of PostgreSQL and MongoDB in production
• Experience with asynchronous programming (asyncio, multithreading)
• Solid skills in SQL and ORM usage (we are migrating to PostgreSQL)
• Hands-on experience with high-load systems
• Strong debugging, optimization, and problem-solving skills
• Excellent communication skills to collaborate with technical and non-technical stakeholders

➕ Nice to have:

• Experience decomposing monoliths into microservices
• ORM optimization via RAW queries
• FastAPI framework knowledge
• Familiarity with GoLang or Node.js
• Experience with RabbitMQ/Kafka
• Previous work with financial systems or payment solutions
• Experience with Redis