Crystal Intelligence is hiring a Senior Python Engineer (DevEx Team, Remote) — the employer-specified location. The overview below is synthesized from the employer posting on crystalintelligence.teamtailor.com: factual requirements and scope are preserved, but prose is rewritten with editorial context. Verify details and apply via the employer link.
Position Summary:
The listing frames the Senior Python Engineer (DevEx Team, Remote) at Crystal Intelligence as a hands-on product role. 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.
Build a standout application
For the Senior Python Engineer (DevEx Team, Remote) at Crystal Intelligence, reviewers look for concise evidence over buzzwords. Mirror the language of the posting sparingly, quantify support or delivery outcomes, and show how you handled ambiguity, time-zone collaboration and user empathy. Keep your resume to impact, keep your cover note to one page, and link to artifacts — tickets resolved, docs shipped, dashboards owned — that prove you can operate in a fast-moving Web3 team. Prepare to discuss a time you turned a confusing user report into a clear fix and how you measure quality in support and operations.
Web3 hiring values reliability: on-time follow-through, clear writing, and a track record of improving runbooks and tooling. Treat the application as a work sample. For interviews, be ready to walk through how you prioritize across time zones, handle a difficult user, and decide when to escalate versus resolve directly. Show how you document decisions so the next teammate benefits.
In a distributed Web3 org, trust builds through written clarity. Use the cover note to demonstrate it.