Position Summary:
We are looking for a talented Senior Python Engineer to join our Platform & Developer Experience team. This is a fully remote role, and we welcome applications from anywhere in Europe. As part of our Build squad, you will play a critical role in shaping the foundations of developer experience, scalability, and performance of the Crystal platform.
More details: crystalintelligence.com
Duties and responsibilities:
- Performance improvements, database query optimisation, and scalability enhancements;
- Monitoring and observability configuration and best practices;
- Managing and developing internal libraries;
- Development pipeline improvements, like code coverage tooling integration, in close collaboration with the DevOps team;
- Maintaining code to high-quality standards;
- End-to-end feature design and implementation;
- Coding, debugging, testing and delivering features and improvements in a continuous manner;
- Providing code reviews, assistance and constructive feedback to other team members;
- Refactoring code as necessary.
Required:
- 8+ years of commercial experience developing Python backend services and APIs for the web;
- Solid software architecture skills;
- Experience with distributed systems;
- Strong knowledge of SQL/NoSQL databases and data architecture, including PostgreSQL;
- Experience with the Flask framework;
- Experience in performance optimisation (database query optimisation, caching);
- Understanding of integration processes with external services;
- Product-oriented mindset;
- Proficiency in English.
Would be a plus:
- Experience with ClickHouse;
- Experience with systems operating on large data volumes;
- Experience designing AI-enabled developer environments;
- Experience writing raw SQL queries;
- Experience designing and leading major reworks of complex distributed systems;
- Experience with Rust;
- Passion for Bitcoin and blockchain technologies.
No previous knowledge of Blockchain technology required.
Tech stack:
- Redis, RabbitMQ, PostgreSQL, ClickHouse;
- Kubernetes, AWS S3;
- Python 3.14, Flask, Granian;
- Datadog, Grafana.
You’ll get:
- AI tool of your choice: Cursor or Claude Code.
