Crystal Intelligence

Senior Python Engineer (DevEx Team, Remote)

Crystal Intelligence  •  Lisbon, PT (Remote)  •  2 days ago
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Job Description

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.

Crystal Intelligence

About Crystal Intelligence

Crystal is a leading blockchain intelligence firm empowering financial institutions, law enforcement and regulators with real-time blockchain analysis, investigative and compliance solutions.

Our solution helps financial institutions comply with global anti-money laundering regulations efficiently. Investigators and government agencies leverage Crystal’s cutting-edge technology and unique real-time intelligence to solve crypto investigations. Available as a free blockchain explorer, SaaS, or API.

Industry
Unknown
Company Size
51-200 employees
Headquarters
Amsterdam, NL
Year Founded
2018
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