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.comDuties 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.About Crystal IntelligenceCrystal is a globally distributed team of world-class blockchain analysts, award-winning mathematicians, and professional software developers with headquarters in London and Amsterdam. We design an all-in-one blockchain analytics solution for regulators, financial services, and law enforcement. Our crypto transaction monitoring and risk assessment software enables financial institutions to comply with global anti-money laundering regulations. Law enforcement agencies and regulators use our technology and data to track the movement of cryptocurrencies in real-time to identify illicit fund flows and solve investigations. Our platform, Crystal Expert, is available as a free online blockchain explorer, as SaaS, or API.
13 days ago