Lead Engineer - AI, Scale & Finance

Klarna; Greater London; Hybrid; GBP 90,000 - 130,000; Full time

Job summary

Klarna is hiring a Lead Engineer to own and evolve systems that move money for millions of users. This hands-on role requires deep technical ownership, architecture decisions, and close collaboration with multiple teams. You will mentor engineers and raise the technical bar across domains, including applying AI in everyday practice.

The ideal candidate thrives in ambiguity, can lead without formal authority, and helps shape the domain with responsible, scalable engineering solutions.

Qualifications

• Built and operated systems with real reliability and performance demands at scale.
• Able to explain complex systems clearly to technical and non-technical audiences.
• Ability to lead through influence across multiple teams.

Responsibilities

• Make sound, defensible technical decisions and communicate trade-offs.
• Ensure architectural alignment and predict how failures propagate under load.
• Tie technical choices to business outcomes and scale solutions to business value.

Skills

Java

JavaScript

Python

System design

Mentoring

Job description

Klarna is hiring a Lead Engineer to own and evolve systems that move money for millions of users. This hands-on role requires deep technical ownership, architecture decisions, and close collaboration with multiple teams. You will mentor engineers and raise the technical bar across domains, including applying AI in everyday practice.

The ideal candidate thrives in ambiguity, can lead without formal authority, and helps shape the domain with responsible, scalable engineering solutions.