Senior Python Developer w Warząchewka Polska, Polska

We are looking for a strong Python Developer to join our GameServer team. You will work on a high-load gaming platform that processes gaming traffic and handles numerous API integrations with external operators. Your focus will be on developing and maintaining scalable backend services, improving system performance and reliability, and contributing to technical and architectural improvements. We’re looking for a proactive engineer who takes ownership of their work, enjoys solving complex technical challenges, and is eager to contribute ideas that make our product better. Requirements

• 4+ years of commercial experience with Python ;
• Strong understanding of algorithms and data structures;
• Solid experience with relational databases (PostgreSQL or similar);
• Experience designing scalable backend systems ;
• Good written English (for documentation and communication);
• Native Ukrainian (spoken and written).

Would be plus

• Experience with non-relational databases (Cassandra, Redis/KeyDB, etc.);
• Hands-on experience with Docker and Kubernetes;
• Experience working with high-load or distributed systems;
• Production experience with monitoring, error tracking and observability tools;
• Experience designing and developing integrations with third-party services and APIs;
• Experience using AI tools to support software development workflows.

Responsibilities

• Develop and maintain high-load backend services;
• Improve system performance, scalability, and reliability;
• Design fault-tolerant systems;
• Take part in architectural decisions and technical discussions;
• Optimize and evolve existing systems and tools;
• Participate in code reviews and engineering best practices;
• Collaborate closely with the team to define priorities and solutions;
• Write clear technical documentation.

Technology Stack

• Python (FastAPI, Flask, Celery)
• JavaScript/TypeScript
• PostgreSQL, Cassandra, KeyDB
• Git, CI/CD (Jenkins)
• Docker
• Kubernetes/Helm

Benefits Be part of the international iGaming industry – Work with a top European solution provider and shape the future of online gaming; A Collaborative Culture – Join a supportive and understanding team; Competitive salary and bonus system – Enjoy additional rewards on top of your base salary; Unlimited vacation & sick leave – Because we prioritize your well-being; Professional Development – Access a dedicated budget for self-development and learning; Healthcare coverage – Available for employees in Ukraine and compensation across the EU; Mental health support – Free consultations with a corporate psychologist; Language learning support – We cover the cost of foreign language courses; Celebrating Your Milestones – Special gifts for life’s important moments; ⏳ Flexible working hours – Start your day anytime between 9:00-11:00 AM; Flexible Work Arrangements – Choose between remote, office, or hybrid work; Modern Tech Setup – Get the tools you need to perform at your best; Relocation support – Assistance provided if you move to one of our hubs.