Senior Python Backend Developer (Fintech)

Project Details

• Location: EU
• Workload: Full-time
• Duration: Long-term
• Start: January 2027
• Rate: $28/hour (B2B)

• English: Fluent

   

Senior Python Backend Developer (Fintech)

We are looking for an experienced Senior Python Backend Developer to join a long-term project in the financial sector.

The project focuses on building high-performance, reliable backend services with complex business and transaction logic.

This role requires deep Python expertise, strong software engineering fundamentals, and the ability to design robust systems beyond standard web frameworks.

Responsibilities

• Design and implement reliable, maintainable backend components and services using Python.
• Develop complex business and transaction logic with a strong focus on data integrity, security, and traceability.
• Optimize backend performance and system reliability.
• Integrate external financial interfaces, databases, and messaging systems.
• Build scalable solutions using clean architecture and core Python libraries.
• Ensure high standards of automated testing, code quality, and fault tolerance.

Requirements

• 5+ years of professional Python backend development experience.
• Deep knowledge of Python, including AsyncIO, multiprocessing, memory management, and the type system.
• Strong experience with performance profiling and optimization.
• Ability to develop backend systems independently of standard frameworks such as Django.
• Strong understanding of algorithms, data processing, and software architecture.
• Experience building reliable, maintainable, and testable backend services.
• Strong focus on clean code, fault tolerance, and data integrity.
• Fluent English.

Nice to Have

• Experience in fintech, banking, or other regulated industries.
• German language skills.

If you have strong Python engineering expertise and enjoy solving complex backend challenges, we'd be happy to hear from you!