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

voize-l; Berlin; Remote; EUR 124.000 - 193.000; Vollzeit

Zusammenfassung

voize is seeking a Freelance Senior Backend Engineer for our German Market squad. You will ensure data flows between our products and partners’ software, building integrations with care and hospital systems.

You can be based remotely across Germany, France, or the UK. The role emphasizes end-to-end ownership, scalable APIs, and close collaboration with partners to improve frontline care.

Qualifikationen

• Several years of experience in backend development and API integration.
• Proficiency in Kotlin for backend services.
• Experience designing and building REST APIs.
• Fluent German (C1) for partner communication.
• Willingness to travel to Berlin; travel costs covered.

Aufgaben

• Shape the future of integrations by connecting voize with care and medical systems.
• Build scalable API interfaces and set industry standards with partners.
• Own end-to-end development of integrations from idea to rollout.
• Design data models and sustainable solutions for complex systems.
• Deliver impact by saving caregivers time and improving workflows.

Kenntnisse

Backend development

API integration

Kotlin

REST API design

German language (C1)

Jobbeschreibung

Overview Application

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.

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.

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

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