# Learnings from a Klarna Engineer on feature development

DevFeed: [Learnings from a Klarna Engineer on feature development](<https://devfeed.tech/articles/learnings-from-a-klarna-engineer-on-feature-development-35652.md>)

Original publisher: [Read original article](<https://engineering.klarna.com/learnings-from-a-klarna-engineer-on-feature-development-9780c7870f3c?source=rss----86090d14ab52---4>)

Author: Julien Avezou

Published: 2025-04-14T09:05:53Z

Content type: article

Language: en

Sources: [Klarna Engineering](<https://devfeed.tech/sources/klarna-engineering.md>)

Topics: [Development](<https://devfeed.tech/topics/development.md>), [Usability](<https://devfeed.tech/topics/usability.md>), [Security](<https://devfeed.tech/topics/security.md>), [Scalability](<https://devfeed.tech/topics/scalability.md>), [Slack](<https://devfeed.tech/topics/slack.md>), [Testing](<https://devfeed.tech/topics/testing.md>), [Architecture & Design](<https://devfeed.tech/topics/architecture-design.md>)

Tags: [bug](<https://devfeed.tech/tags/bug.md>), [collaboration](<https://devfeed.tech/tags/collaboration.md>), [communication](<https://devfeed.tech/tags/communication.md>), [development](<https://devfeed.tech/tags/development.md>), [documentation](<https://devfeed.tech/tags/documentation.md>), [engineering](<https://devfeed.tech/tags/engineering.md>), [fintech](<https://devfeed.tech/tags/fintech.md>), [klarna](<https://devfeed.tech/tags/klarna.md>), [learning-to-code](<https://devfeed.tech/tags/learning-to-code.md>), [scalability](<https://devfeed.tech/tags/scalability.md>), [security](<https://devfeed.tech/tags/security.md>), [slack](<https://devfeed.tech/tags/slack.md>), [software-development](<https://devfeed.tech/tags/software-development.md>), [software-engineer](<https://devfeed.tech/tags/software-engineer.md>), [technical](<https://devfeed.tech/tags/technical.md>), [testing](<https://devfeed.tech/tags/testing.md>)

## AI overview

A Klarna engineer shares lessons from developing a feature that helps users recover access to Klarna Card and Klarna balance accounts. The article emphasizes early and ongoing documentation, open communication through dedicated Slack channels, and collaborative Bug Bashes to support feature development.

## Source excerpt

In the world of FinTech, where regulations and innovation collide, my team at Klarna implemented new ways for users to recover access to their Klarna Card and Klarna balance accounts on their device. This posed a series of challenges with a whole range of aspects to consider from product, usability, security, scalability and regulatory. With the feature now released, I would like to share key learnings from working on this complex feature. Documentation is Key Starting to document early on in the project is crucial. We generated documents at all stages of our project in order to gather feedback at a technical, product and design level. This helped in aligning with teams, enabling smooth collaboration, and setting a solid foundation for feature development and delivery. These documents allow close and continuous collaboration between stakeholders from both product, technical and design perspectives from the early stages of feature discovery to the start of implementation. However documentation doesn't stop there, once the implementation is done, it is equally as important to capture in writing your feature from both product and technical aspects, supported by architectural diagrams and swimlanes, so that stakeholders within the company have a clear reference when interacting with the feature in the future. Always communicate Establishing open communication channels, such as dedicated Slack channels for internal stakeholders, and providing regular updates in order to foster collaboration. Promptly raising blockers and organizing group discussions with colleagues from various competences ensures transparency and helps in addressing challenges effectively. Having an open channel to discuss and update on progress also helped streamline our communication and avoid unnecessary meetings. Having an open channel also serves as an accountability mechanism and a great way to keep track of the conversations and topics over time. The dedicated channel also provides an easy way to