Security Engineer

Sitoo Kassasystem; Stockholms kommun; On-site; SEK 70,000 - 100,000; Full time

Job summary

Sitoo Kassasystem is seeking a passionate Security Engineer to join our innovative team. You will be pivotal in designing and building secure backend services for our cutting-edge Unified Commerce Platform. Your role will involve evolving backend solutions, ensuring secure access patterns, and mentoring teams to maintain shared security ownership.

We strive for an inclusive workplace and value curiosity, collaboration, and continuous improvement. Join us in shaping the future of retail.

Qualifications

• Strong hands-on server-side development experience and experience in building scalable, reliable and secure cloud services in AWS.
• Professional English, both verbal and written.

Responsibilities

• Build and evolve backend services and APIs that are scalable, observable, and secure.
• Design resilient AWS architectures and own our multi-account setup via Infrastructure as Code.
• Lead on authentication and authorization patterns and guide teams on secure access.
• Champion shared security ownership through clear guidelines, examples, and mentoring.

Skills

Server-side development

Cloud services in AWS

Identity and access management

CI/CD integration

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 Security Engineer we’re looking for?

Your mission at Sitoo

As a Security Engineer at Sitoo you will work as part of a small and agile team of developers with the goal of developing technology to provide the best Point of Sales and Unified Commerce Platform in the world. You will design and build backend services that are secure by default. You’ll pair hands‑on development with practical security leadership: setting standards, automating guardrails, and helping product teams ship safely and independently.

What you will do

• Build and evolve backend services and APIs that are scalable, observable, and secure.

• Design resilient AWS architectures and own our multi‑account setup via Infrastructure as Code

• Lead on authentication and authorization patterns and guide teams on secure access.

• Champion shared security ownership through clear guidelines, examples, and mentoring.

What you’ll bring to the table

• Strong hands‑on server‑side development experience andexperience in building scalable, reliable and secure cloud services in AWS.

• You confidently interact with individuals, teams and organizations to make sure they are informed, to be able to keep them accountable.

• Proven experience on AWS and with IaC and least‑privilege design

• Solid understanding of identity and access management, tokens, and federation

• Experience integrating security controls into CI/CD

• Professional English, both verbal and written.

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.