Senior Backend Developer
Senior Backend Developer – Identity Core
Build the backend behind digital access for hotels around the world.
Vostio is a cloud-native SaaS platform used by hotels globally to manage digital access, permissions and identity. As a Senior Backend Developer, you’ll build and evolve the backend services, APIs and integrations behind these capabilities.
The role
You’ll join a small platform team where you’ll design, build and operate the services behind Identity Core. Working with Java, Kotlin or Go and AWS, you’ll shape APIs, microservices and cloud infrastructure while contributing to the architecture and technical direction of the platform.
The team works close to production and uses spec-driven, AI-assisted development across design, coding and review. You’ll have the autonomy to solve complex technical problems, influence how the team builds software and see the impact of your work in a product used by hotels around the world.
What you’ll do
• Design and build Java/Kotlin/Go microservices for access, permissions and identity management.
• Own features end to end, from spec through production and support.
• Design and evolve APIs and integrations across the hospitality ecosystem.
• Host and operate services on AWS, provisioned entirely through infrastructure as code.
• Contribute to architecture decisions and how the team builds software.
What we’re looking for
• 8+ years building backend systems in Java, Kotlin, or Go.
• Hands-on experience hosting and operating microservices on AWS.
• Strong command of infrastructure as code (Terraform, CDK, or CloudFormation).
• Experience with distributed, API-first, microservice architectures.
• Comfort working with AI-assisted development workflows, or eagerness to adopt them.
Nice to have: AWS Cognito, ECS, SNS/SQS; experience with SaaS platforms or access management/identity systems; frontend experience (React).
What we offer
We're passionate about providing opportunities and benefits that support your development and long-term success. Here's what we have to offer:
• A competitive salary and benefits package.
• Learning and career development opportunities, whether through online learning, technical training, or new challenges.
• Hybrid working and a collaborative engineering environment.
• The opportunity to contribute to innovative products used by customers around the world.
We review applications regularly, so don't wait
We are building diverse, inclusive teams and encourage applications from everyone who can see themselves working with us. Just set up your profile and apply here.
To make sure your personal data is safe, we don't review applications sent by email or post. If you have any questions about the role or the process, please contact Léa Rein, Senior Talent Acquisition Business Partner, at lea.rein@assaabloy.com.
Depending on the risk profile for the role, a background screening may need to be performed. Final candidates may therefore be subject to a background screening. The performance of a background check is subject to consent and based on our Applicant Privacy Notice.
We are the ASSA ABLOY Group
Our people have made us the global leader in access solutions. In return, we open doors for them wherever they go. With nearly 63,000 colleagues in more than 70 different countries, we help billions of people experience a more open world. Our innovations make all sorts of spaces – physical and virtual – safer, more secure, and easier to access.
As an employer, we value results – not titles, or backgrounds. We empower our people to build their career around their aspirations and our ambitions – supporting them with regular feedback, training, and development opportunities. Our colleagues think broadly about where they can make the most impact, and we encourage them to grow their role locally, regionally, or even internationally.
As we welcome new people on board, it’s important to us to have diverse, inclusive teams, and we value different perspectives and experiences.
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