Back to all rolesSenior Python EngineerApplyJob detailsEngineeringStockholm, MilanFull-timekr 752,814 SEK - kr 843,151 SEKWhat you will doYou will design, build, and maintain scalable Python applications across backend services, APIs, and data infrastructure, developing and optimising RESTful APIs and microservices using frameworks such as FastAPI, Django, or Flask. You will build and maintain data pipelines, ETL processes, and integrations with both SQL and NoSQL databases, while collaborating with data science and ML teams to productionise models and automate workflows. Contributing to architectural decisions and technical roadmaps, you will write clean, well-tested, and well-documented code and participate in thorough code reviews. You will also mentor junior and mid-level engineers, fostering a culture of technical excellence, and identify and resolve performance bottlenecks, bugs, and reliability issues across the platform.Who you are5+ years of professional Python development experience, with a deep understanding of Python internals, async programming, and performance optimisation.Strong experience with at least one web framework such as FastAPI, Django, or Flask.Hands-on experience with data tools such as Pandas, NumPy, SQLAlchemy, or Airflow.Experience with AWS and containerisation technologies including Docker and Kubernetes.Proficiency with CI/CD pipelines, Git workflows, and testing frameworks such as pytest.Strong grasp of software design patterns, SOLID principles, and clean architecture.Excellent communication and collaboration skills.Awesome to haveExperience with DevOps tooling and infrastructure-as-code solutions such as Terraform or Ansible.Background in distributed systems or event-driven architecture using Kafka or RabbitMQ.Familiarity with ML/AI libraries such as scikit-learn, PyTorch, or TensorFlow.Contributions to open-source Python projects.Please include a CV in EnglishCurious to learn more about Klarna and what it's like to work here? Explore our career site!Upload your resume to autofill the applicationUploadFirst name *Last name *Email *Dial codePhone numberLinkedIn profile *Please upload your resume (preferably as a PDF file) *Click or drag file to uploadSupported file format: .PDF; Maximum file size: 10.49 MB; Maximum file: 1;Mandatory Are you currently based in the location the job is posted in? *YesNoAre you legally authorised to work in the location where this position is based? *YesNoWill you now or in the future require sponsorship for employment authorization or visa status in the location this position is based? *YesNoAI disclaimerThis application process may use AI-enabled systems to support candidate evaluation based on factors such as experience, technical skills, and qualifications. All processing is carried out in accordance with applicable data protection, AI governance, and labour laws. Human oversight is maintained at all stages, and final hiring decisions are made by people. Personal data submitted as part of this application is not used to train AI models.I have read and understood the privacy policy and acknowledge that my personal data will be processed as part of this application.ApplyApplyHire withPrivacy Policy
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