Senior Python Engineer

Employer: Klarna

Location: Warsaw (hybrid work when required)

Rate: 165 - 195 PLN per hour

Cooperation model: B2B or Employment contract

Start date: ASAP

Duration: long-term agreement

Recruitment process: 1 timed Abstract and Logical Reasoning Test (up to 15 minutes); 1 short interview (up to 30 minutes)

Do you want to play a key role in revolutionizing the future of finance? Join Klarna - a global leader in deferred payments, with over 85 million active users and 2.5 million transactions processed daily! As a pioneer in modern payment solutions, Klarna is developing innovative methods that streamline the shopping experience, enhance transaction security, and expand the availability of purchasing options. 

We're seeking individuals eager to achieve remarkable results and share their bold vision to redefine the future of payments and fintech. Send us your CV - we can’t wait to meet you!

Your role is:

-> To build & maintain Python microservices that power Klarna’s LLM-driven tools and upcoming AI-based internal platforms;

-> To monitor & optimize performance using Datadog, Langsmith, and other observability tools, tracking KPIs like latency, error rates, and user satisfaction;

-> To collaborate cross-functionally with Product, Data Science, Legal, and Customer Service to ensure our AI solutions are scalable, compliant, and customer-centric;

-> To champion best practices: code reviews, CI/CD, Docker, testing, and microservices architecture - all in a fast-paced, learning-focused environment.

Your skills and experiences:

-> At least 7 years of experience with Python plus practice with building RESTful APIs (FastAPI, Flask, or Django);

-> AWS/cloud know-how (Lambda, ECS, or similar) and microservices expertise;

-> A passion for AI - bonus points if you’ve dabbled in LLMs, NLP, or prompt engineering;

-> Familiarity with CI/CD, Docker, Git;

-> Strong communication skills - you’ll interact with both technical and non-technical teams;

-> Language proficiency: Advanced English (minimum B2 level).

Our client offers:

+ Great opportunity for personal development in a stable and friendly large multinational company;

+ Start-up mentality, small agile teams;

+ Global Reach: Impact millions with seamless shopping and payments;

+ Career growth and additional education.

If interested, please apply safely through this portal (application rules are in accordance with GDPR). Employment agency Nr 17138.