Mid/Senior Python Software Engineer (Web3)

TL;DR

Mid/Senior Python Software Engineer (Web3): Building scalable backend systems and developing tools for blockchain analytics and crypto fraud detection with an accent on high-performance data processing and security. Focus on designing robust APIs, optimizing memory management, and collaborating with cross-functional teams to ensure system reliability in the digital asset space.

Location: Must be based in Europe (remote or hybrid)

Salary: €60,000–€90,000

Company

A specialized firm focused on enhancing safety, transparency, and security within blockchain and next-generation payment systems.

What you will do

• Develop and maintain scalable backend systems for blockchain analytics.
• Build tools to detect and prevent crypto fraud.
• Collaborate closely with data scientists and DevOps engineers.
• Optimize backend performance and memory management.
• Support the development of data-driven security insights.

Requirements

• 5+ years of experience in software development.
• Fluent English proficiency.
• Strong Python skills including async, typing, and memory management.
• Solid grounding in algorithms, data structures, and backend design.
• Experience with FastAPI, Flask, or Django.
• Proficiency with Docker, CI/CD, and SQL/NoSQL databases.

Nice to have

• Experience with Web3, blockchain, or on-chain analytics.
• Knowledge of graph algorithms.
• Cloud experience (AWS, GCP, Azure).
• Familiarity with Spark, Redis, or Kafka.
• Experience with ETL processes or ML deployment.