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Senior Python Engineer (DevEx Team, Remote)

Crystal Intelligence
Posted 3 months ago, valid for 13 days
Salary

Competitive

Contract type

Full Time

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Sonic Summary

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  • We are seeking a Senior Python Engineer with over 8 years of commercial experience to join our fully remote Platform & Developer Experience team in Europe.
  • The role involves enhancing performance, optimizing database queries, and improving scalability on the Crystal platform.
  • Candidates should have strong skills in Python backend services, SQL/NoSQL databases, and experience with the Flask framework.
  • The position offers a competitive salary, with additional benefits including access to AI tools like Cursor or Claude Code.
  • No prior knowledge of blockchain technology is required, but a passion for Bitcoin and related technologies is a plus.

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.




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