Senior Python Engineer (Backend)

TL;DR

Senior Python Engineer (Backend): Design, build, and maintain scalable Python applications across backend services, APIs, and data infrastructure with an accent on RESTful APIs, microservices, and data pipelines. Focus on productionizing ML models, performance optimization, architectural decisions, and mentoring developers.

Location: Stockholm, Milan

Salary: kr 752,814 SEK - kr 843,151 SEK

What you will do

• Design, build, and maintain scalable Python applications for backend services, APIs, and data infrastructure
• Develop and optimize RESTful APIs and microservices using FastAPI, Django, or Flask
• Build data pipelines, ETL processes, and database integrations (SQL/NoSQL)
• Collaborate with data science and ML teams to productionize models and automate workflows
• Contribute to architecture, roadmaps, code reviews, and mentoring
• Resolve performance bottlenecks, bugs, and reliability issues

Requirements

• 5+ years of professional Python development experience
• Deep knowledge of Python internals, async programming, and performance optimization
• Strong experience with web frameworks (FastAPI, Django, or Flask)
• Hands-on with data tools (Pandas, NumPy, SQLAlchemy, Airflow)
• Familiarity with ML/AI libraries (scikit-learn, PyTorch, TensorFlow)
• Experience with cloud platforms (AWS, GCP, Azure), Docker, Kubernetes, CI/CD, Git, pytest
• Strong software design patterns, SOLID principles, clean architecture
• Excellent communication and collaboration skills

Awesome to Have

• DevOps tooling and IaC (Terraform, Ansible)
• Distributed systems or event-driven architecture (Kafka, RabbitMQ)
• Contributions to open-source Python projects