Senior iOS Engineer - Merchant Solutions

Sitoo Kassasystem; Stockholms kommun; Hybrid; SEK 550,000 - 750,000; Full time

Job summary

Sitoo Kassasystem is seeking a Senior iOS Engineer to join a team dedicated to shaping the future of retail technology. This role involves developing features for the iOS application, focusing on performance, scalability, and modernizing the codebase.

The ideal candidate will have solid experience in iOS app development with Swift and a collaborative, problem-solving mindset. The position is hybrid and requires a permanent residency in Sweden.

Qualifications

• Solid experience building and maintaining complex iOS apps in Swift.
• Familiarity with Kotlin Multiplatform (KMP) or interest in cross-platform development approaches.
• A strong understanding of mobile architecture and design patterns.

Responsibilities

• Develop and maintain features in our iOS app using Swift and modern iOS frameworks.
• Improve performance, stability, and scalability while reducing technical debt.
• Collaborate closely with Product, Design, QA, and other engineers to deliver a world-class user experience.

Skills

iOS app development

Swift programming

Agile methodologies

Cross-platform development

Mobile architecture

Collaboration and teamwork

Fluency in English

Job description

Join our highly skilled team of developers - breaking new ground and shaping the future of retail.

We dare to dream big, we have the courage to keep raising the bar, and we’re committed to being a force for good in retail - helping both established and fast-growing brands meet the ever-changing expectations of their customers.

Sitoo is a fast-growing technology company exploring how far we can take innovation to deliver the world’s best Unified Commerce Platform and Point of Sale. Our technology is used in more than 20 countries - a number that keeps growing thanks to our incredible team of developers. And we have no intention of slowing down. Are you the Senior iOS Engineerwe’re looking for?

Your mission at Sitoo

At Sitoo, we're building a modern retail platform with global ambitions - and we’re looking for a Senior iOS Engineer to help shape that future.

In this role, you'll work hands-on in our iOS codebase, build features used by retailers across the world, and contribute to architectural improvements that set the foundation for long-term success. You’ll collaborate closely with product and design, and help level up your peers through code reviews and knowledge sharing.

About the team

Merchant Solutions is where we turn complex retail challenges into simple, high-impact experiences. We build products that help merchants work more efficiently, grow with confidence, and get more value from their daily operations - by reducing friction, easing operational complexity, and turning data into actionable insights.

We work in a modern, empowered product environment with small cross-functional teams, close collaboration between engineering, product, and design, and a strong focus on outcomes over output. You’ll help shape both what we build and how we build it through rapid discovery, prototyping, iteration, and high-quality delivery.

If you thrive where creativity meets ownership - and where teams solve problems end-to-end from discovery to delivery, Merchant Solutions could be a match for you.

What you will do

• Develop and maintain features in our iOS app using Swift and modern iOS frameworks.
• Improve performance, stability, and scalability while reducing technical debt and modernizing our codebase.
• Contribute to architectural discussions and help shape technical direction in partnership with Staff Engineers and Tech Leads.
• Write clean, testable, and maintainable code that supports our product and performance goals.
• Collaborate closely with Product, Design, QA, and other engineers to deliver a world-class user experience.
• Participate in code reviews, pair programming, and knowledge sharing sessions.
• Contribute to team processes, engineering practices, and continuous improvement efforts.

What you’ll bring to the table

• Solid experience building and maintaining complex iOS apps in Swift.
• Familiarity with Kotlin Multiplatform (KMP) or interest in cross-platform development approaches
• A strong understanding of mobile architecture, system design, and design patterns.
• A product mindset — you enjoy working with cross-functional teams to solve real customer problems.
• Experience working in an agile team environment with CI/CD, feature flags and other modern workflows.
• A collaborative and supportive approach to teamwork and code quality.
• Fluency in English, both written and spoken.

Why Sitoo

We are forward thinkers. By turning curiosity into knowledge - and knowledge into continuous improvement - we break new ground and shape the future of retail. We believe in an inclusive culture where everyone feels like they belong. We support each other, win together, celebrate success together, and overcome challenges together.

Today, we are close to 100dedicated experts with a positive and solution-oriented mindset. Most importantly, we take care of each other, and we never forget to have fun.

This is a hybrid role based in Stockholm or Gothenburg. Please note that we are currently unable to offer relocation support for this position, so you’ll need to hold a permanent residence permit in Sweden.