Senior Python Engineer - AI-Powered SaaS Backend

B3 Consulting Poland; Kraków; On-site; PLN 180,000 - 240,000; Full time

Benefits offered by this job

Health and sports benefits

Speed Coaching

Sports training

Team events

Development-focused meetups

Job summary

B3 Consulting Poland is seeking a Senior Python Engineer to join our Kraków-based team. You will design, develop, and scale backend services in a SaaS architecture, delivering robust REST APIs and data-driven features for international projects.

You will collaborate with product teams and tech leads, implement analytical algorithms, and continuously improve code quality while adopting AI tooling to stay at the forefront of innovation.

Qualifications

• Strong Python fundamentals and Django development experience.
• Proficient with relational databases (PostgreSQL).
• Experience architecting, designing, and delivering scalable REST APIs.

Responsibilities

• Design, develop, and expand scalable backend services and REST APIs within a SaaS architecture.
• Implement and test analytical algorithms to ensure correctness and output accuracy.
• Collaborate with product teams and Tech Leads to analyze requirements.
• Diagnose and resolve production issues and bugs.
• Adopt AI developer tools in daily workflows and propose AI-powered features.

Skills

Python

Django

PostgreSQL

REST APIs

AI tools

English fluency

Tools

Cursor

GitHub Copilot

Claude Code

Job description

B3 Consulting Poland is seeking a Senior Python Engineer to join our Kraków-based team. You will design, develop, and scale backend services in a SaaS architecture, delivering robust REST APIs and data-driven features for international projects.

You will collaborate with product teams and tech leads, implement analytical algorithms, and continuously improve code quality while adopting AI tooling to stay at the forefront of innovation.