Senior Erlang Engineer - Dunning Banking Servicing

Klarna; Stockholms kommun; Híbrido; SEK 700.000 - 1.000.000; Jornada completa

Descripción de la vacante

Klarna is seeking a Backend Engineer to join the team building real-time payment services in a distributed Erlang/Elixir environment. You’ll own services from design to production, ensure high availability, and collaborate with cross-functional teams across engineering and product.

You’ll write clean, testable code, optimize performance in a real-time, cloud-based setup, and help shape architecture decisions. The role offers a hybrid office model in Stockholm and opportunities to grow in fintech.

Formación

• Proficient in Erlang or Elixir and distributed systems design.
• Experience with real‑time payment systems or fintech is a plus.
• Knowledge of building scalable, high‑availability services in production.

Responsabilidades

• Design, build, and maintain backend systems behind payment services.
• Collaborate with cross‑functional teams to solve distributed systems challenges.
• Own services end-to-end from design to production, ensuring availability and performance.

Conocimientos

Erlang

Elixir

Distributed systems

AWS

APIs

Microservices

Clean code

Herramientas

Docker

Kubernetes

AWS

Descripción del empleo

Klarna, briefly

At Klarna, we’re building an everyday finance network, helping over 120 million consumers across 26 countries save time and money, and worry less about their finances. Working here means taking on problems most companies never get to solve, and being hands‑on enough that the interesting part of the work lands with you, not someone else — you’ll build with AI, not watch it happen.

Klarna, briefly

At Klarna, we’re building an everyday finance network, helping over 120 million consumers across 26 countries save time and money, and worry less about their finances. Working here means taking on problems most companies never get to solve, and being hands‑on enough that the interesting part of the work lands with you, not someone else — you’ll build with AI, not watch it happen. This is the stretch zone. Come find out what you’re capable of.

About The Role

Every payment a consumer makes through Klarna passes through backend services that have to respond in real time and keep responding when parts of the system fail. This position sits on the team that builds and runs those services in Erlang, primarily Kred and the Card payment gateway. You’ll work in a cross‑functional team on distributed systems problems where availability, fault tolerance, and performance decide whether a payment goes through. You’ll own services from design to production, and you’ll have a say in the architecture decisions that shape them.

What You’ll Do

• You’ll design, build, and maintain the backend systems behind those payment services.


• You’ll work with cross‑functional teams to solve distributed systems problems and contribute to architecture decisions and implementation.


• You’ll own your services end to end, and keep them available, fault tolerant, and fast in a real‑time environment.


• You’ll improve how engineers across the organization build and operate services, and share what you learn with them.

Who You Are

• You’re a software engineer who has written production code in Erlang, or you’ve worked in Elixir and can move to Erlang.


• You understand distributed systems, concurrency, and fault‑tolerant design, and you’ve applied them in production.


• You’ve built and maintained scalable, high‑availability systems in production, including on AWS.


• You’ve worked with APIs, messaging systems, and microservices architectures.


• You write clean, testable, maintainable code.


• You’ve worked in agile teams alongside cross‑functional colleagues, and you diagnose problems in complex systems.


• You communicate in English at a working level, verbally and in writing.

Bonus points for

• You’ve worked with OTP principles and the wider Erlang ecosystem.


• You’ve used containerization technologies such as Docker and Kubernetes.


• You’ve done monitoring, observability, or performance tuning in distributed systems.


• You’ve worked in fintech, payments, or another high‑availability environment.


• You’ve worked with card payment APIs.

Things you should know before applying

• Working together: we value co‑located teams; most teams currently meet in the office 2–3 days per week, and this varies by team and can change over time.


• Non‑obvious backgrounds are welcome. Diversity of skills, perspectives and backgrounds is how we create, innovate, and disrupt like no other.


• Final compensation will be based on the candidate’s qualifications, skills, and experience.