Freelance Backend Engineer - Kotlin (m/f/d)

Berlin remote Until 10/6/2026 First posted July 14, 2026 Last posted August 7, 2026
Job description

🎀 Why voize? Because we’re more than just a job!

At voize, we believe the greatest gift to frontline workers is time - time to care, connect, and be present. Today, that time is lost to admin work that pulls nurses away from what matters most: people.

πŸ’‘ Your Mission

As a Freelance Senior Backend Engineer for our German Market squad, you’ll ensure that data flows smoothly between our products and our partners' software solutions. You'll build and maintain the integrations that connect the voize with senior care and hospital software platforms. We are open for you to be based remotely across Germany, France or the UK.

πŸš€ Your Daily Business – No two days are alike

  • Shape the future of our integrations – Develop interfaces that seamlessly connect voize with systems in the care and medical sector

  • Build future-proof solutions – Develop a scalable API, set industry standards, and work closely with partners and clients

  • Take end-to-end ownership – From the idea and implementation to the ongoing development of our integrations

  • Architecture with foresight – Design thoughtful data models and sustainable solutions for complex systems

  • Work with impact – Your work saves caregivers time, improves documentation, and supports people who do amazing work every day.

🀝 Your Skillset – What you bring to the table

  • Several years of experience in backend development and API integration

  • Excellent proficiency with Kotlin

  • API design and development with REST

  • Fluent in German (C1) to communicate effectively with partners

  • Willingness and work authorisation to travel to Berlin (we cover your expenses!)

  • Can work with us for minimum 3+ months

✨ Ready to talk? Apply now! πŸš€

We look forward to your application and can’t wait to meet you – no matter who you are or what background you have!

About this role

Summary

Develop and maintain APIs and integrations for healthcare software solutions.

Job title

Freelance Backend Engineer - Kotlin (m/f/d)

Experience level

several years

Industry

healthcare

Location requirements

Remote across Germany, France, or UK with travel to Berlin allowed

Salary

Not specified

Management role

No

Skills & keywords

Required skills

KotlinAPI designREST

Preferred skills

German (C1)

Specializations

backend developmentAPI integrationAPI designRESTKotlin
Locations

Structured locations inferred from the posting.

Germany

Remote Country

France

Remote Country

United Kingdom

Remote Country

Berlin, Germany

On-site City