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Senior Mobile App Developer specializing in Kotlin Multiplatform


THNX is a consultancy with the motto: Better solutions together.

We work in team-based setups within our experienced in-house team in Umeå, as well as with our Sweden-based and global partners.

Right now, we’re looking for a senior mobile app developer specializing in Kotlin Multiplatform who wants to keep learning and growing together with us. You’ll work with a high degree of freedom and responsibility, in close collaboration with a team that actively supports and helps each other. Together, we ensure that we always deliver high-quality solutions.

You’ll collaborate closely with project managers, UX/UI designers, and developers across web, mobile apps, backend, and AR.

For us You, your personality and your drive matter. We believe in strong, cohesive teams with diverse backgrounds who enjoy working together to create the best possible solutions for our clients.

About you

We’re looking for someone with a strong interest in mobile app development who enjoys collaborating both within teams and with clients. Experience with agile development methods is a plus, and an interest in learning more about AI is highly valued.

We believe you have at least 2–3 years of experience working primarily with Kotlin Multiplatform. It’s also a big plus if you have solid experience in Swift for iOS and Java for Android.

You’ll collaborate with colleagues around the world, so you need to be comfortable communicating in English.

We’re currently building a strong, cohesive team with Umeå as our base, so it’s beneficial if you live in or near Umeå.

About the role

At THNX, as a technical specialist, you’ll work very closely with clients and their needs. You’ll advise on and help choose the right technologies, as well as how to apply them to create the best possible solutions.

We offer varied and exciting projects, primarily within systems related to mobile machinery. You’ll have the opportunity to grow professionally and deepen your expertise in mobile app development, supported by senior colleagues. We think long-term and work iteratively—we want to grow together.

In this role, you’ll work with both large and mid-sized clients, and you may also get the chance to collaborate closely with entrepreneurs at the start of their digital journey.

Why join us

Beyond the obvious benefits like flexible working hours and locations, time for personal development, and great colleagues, we also offer flexible time off, a personal equipment budget (in addition to computer and phone), R&D opportunities, the possibility to become a co-owner or partner, close collaboration with both entrepreneurs and larger companies, group training activities, and much, much more.

No mountain is too big to climb as long as we work together toward the same goal!