Senior Engineer -Python

Klarna Bank AB; Stockholms kommun; On-site; SEK 600,000 - 800,000; Full time

Job summary

A financial services company is seeking a highly skilled engineer to build and maintain AI-driven systems using Python and SQL. The role involves end-to-end project ownership, where you will present your work to leadership and support your projects actively. A flexible tech stack is essential, with experience in OpenAI APIs, Docker, and AWS being highly desirable. This position requires a self-driven attitude and adaptability in a rapidly changing environment, thriving in public and transparent workspaces.

Qualifications

• Heavy hands-on experience with AI-driven solutions and prompt engineering.
• Ability to build MVPs within short cycles and gather feedback.
• Demonstrated experience in maintaining production systems.

Responsibilities

• Build and maintain Python and SQL based systems.
• Evolve metrics monitoring with AI insights.
• Present technical outcomes to senior leadership.
• Work in Slack with full transparency.

Skills

Experience with OpenAI/Anthropic APIs

Strong command of Python

Comfortable with Docker

Knowledge of AWS

Ability to design and implement APIs

Adaptable to different tech stacks

Tools

Terraform

Airflow

Slack API

Job description

What you'll do

• Build and maintain Python and SQL based systems for data pipelines, analyses, monitoring, and automated alerting
• Evolve Klarna's abilities to measure and monitor its business critical metrics from an AI-driven perspective
• Own projects end-to-end in time-boxed phases: scoping (1-2 weeks) → building → deploying → iterating
• Present technical work and tradeoffs to senior leadership
• Support and maintain what you build - no throwing projects over the wall
• Work publicly in Slack channels with radical transparency (all work visible to the team)

Who you are

• AI-First Engineer: Heavy hands-on experience with OpenAI/Anthropic APIs, prompt engineering, and AI-assisted coding tools (Cursor, GitHub Copilot, Claude Code, etc)
• Tech Stack Flexible: Comfortable working across Python, Docker, AWS, APIs, databases - you adapt to the problem, not the other way around
• Business-Oriented: You translate stakeholder needs into technical solutions and care about why we are solving a problem, not just how
• Iterative Shipper: You build MVPs in 1-2 week cycles, gather feedback, and iterate quickly
• Change Resilient: You thrive when priorities shift, requirements evolve, and ambiguity is the norm
• Self-Driven: You proactively unblock yourself, drive projects forward, and communicate openly in public channels

Awesome to have

• Good understanding of common design patterns and comfortable with modern Python 3 practices (type hints, protocols, Pydantic, uv)
• Experience with Terraform, Airflow, Slack API, OpenSearch, SPARQL, CI/CD
• Track record of maintaining production systems while building new features
• Background working with cross-functional stakeholders in product, analytics, and business operations
• Comfort working in highly transparent, documentation-heavy environments
• Experience killing or rescoping projects that aren't delivering value