Senior Python Developer

b3consultingpoland; Kraków; Hybrid; PLN 140,000 - 190,000; Full time

Benefits offered by this job

Health and sports benefits

Speed Coaching

Sports training and team events

Development-focused meetups

Scandinavian culture-inspired work

Job summary

b3consultingpoland is seeking a Senior Python Engineer in Kraków to design and build scalable backend services within a SaaS environment. You will work with a range of technologies, APIs, and AI-assisted workflows in an international team.

Responsibilities include implementing statistical algorithms, collaborating with product teams, and resolving production issues while adopting AI tools to drive new features.

Qualifications

• Strong Python fundamentals and Django experience.
• Experience with PostgreSQL and relational databases.
• Experience architecting scalable REST APIs.
• Proficiency with AI coding assistants used daily.
• Fluent professional English for international collaboration.
• Ability to work with statistics (regressions, distributions, p-values) with domain experts.

Responsibilities

• Design, develop, and expand scalable backend services, modules, and REST APIs within a SaaS architecture.
• Implement, verify, and continuously test analytical and statistical algorithms to guarantee full correctness and output accuracy.
• Analyze business and technical requirements in close collaboration with product teams, engineering peers, and Tech Leads.
• Diagnose, analyze, and efficiently resolve technical issues and production bugs.
• Actively adopt AI developer tools in daily workflows and propose concepts for new AI-powered product features.

Skills

Python fundamentals

Django

PostgreSQL

REST APIs

AI coding assistants

English

Statistics

Tools

Cursor

GitHub Copilot

Claude Code

Job description

We are part of an international organization listed on Nasdaq Stockholm, operating in 11 countries. In Poland, we work with full autonomy. We independently choose our technologies, processes, and ways of working while maintaining the highest professional standards.

We deliver a wide range of IT projects in Poland and internationally, across multiple domains and technologies. This allows our consultants to develop their competencies and gain experience aligned with their professional ambitions.

Our collaboration is built around the CARE philosophy. For us, it means responsible project matching, transparent cooperation, and a long-term approach to professional growth.

Join us as Senior Python Engineer. Grow in an environment that cares about your development as much as you do.

Your responsibilities

• Design, develop, and expand scalable backend services, modules, and REST APIs within a SaaS architecture.

• Implement, verify, and continuously test analytical and statistical algorithms to guarantee full correctness and output accuracy.

• Analyze business and technical requirements in close collaboration with product teams, engineering peers, and Tech Leads.

• Diagnose, analyze, and efficiently resolve technical issues and production bugs.

• Actively adopt AI developer tools in daily workflows and propose concepts for new AI-powered product features.

Requirements

• Strong Python fundamentals and commercial experience developing applications with Django.

• Proficiency with relational databases (such as PostgreSQL),

• Experience in architecting, designing, and delivering scalable REST APIs.

• Daily experience using AI coding assistants (such as Cursor, GitHub Copilot, or Claude Code).

• Professional fluency in written and spoken English for seamless collaboration in an international team.

• Readiness to work with applied statistics (regressions, distributions, p-values) and implement models alongside domain experts.

What we offer

• Work in a Scandinavian culture built on logic and dialogue.
• Health and sports benefits tailored to your needs.
• Speed Coaching - short sessions that provide new perspectives and solutions.
• Sports training, an internal team, and opportunities to take part in competitions.
• Team events and development-focused meetups.