Freelance Backend Engineer (Kotlin) – French Market

About the role

We are looking for a freelance senior backend engineer to join our French‑market squad. You will be responsible for ensuring seamless data exchange between voize’s platform and partner software used in senior‑care and hospital environments.

Key responsibilities

• Design, develop and maintain robust integrations that connect voize with external care and medical systems.
• Build scalable, future‑proof REST APIs and set industry‑level standards.
• Own the full lifecycle of integration projects, from concept through implementation to ongoing support.
• Architect thoughtful data models and sustainable solutions for complex workflows.
• Collaborate closely with partners, clients and internal teams to deliver high‑impact features that save caregivers time.

Required profile

• Several years of professional backend development experience.
• Fluent in French (C1 level) for effective communication with partners.
• Based in France, Germany or the United Kingdom and willing to travel to Paris (expenses covered).
• Availability for a minimum engagement of three months.

Required skills

• Kotlin programming language.
• REST API design and development.
• API integration and backend development.

What we offer

• Flexible freelance contract with remote work possibilities.
• Opportunity to impact the healthcare sector by reducing administrative burden for frontline workers.
• Collaboration with a mission‑driven team focused on improving patient‑caregiver interactions.