{"id":74382,"url":"https://alion.io/job/voize-freelance-senior-backend-engineer-kotlin-mfd","title":"Freelance Senior Backend Engineer - Kotlin (m/f/d)","company":{"id":6593,"name":"voize","domain":"voize.com","url":"https://alion.io/company/voize","size_band":null,"is_staffing_agency":false,"employer_type":"direct","is_intermediary":false,"listed_via":null,"ats_vendor":"Ashby","truth_index":{"grade":"B","score":84,"open_postings":9,"ghost_share":0,"stale_share":0.556,"repost_share":0.111,"time_to_fill_p50_days":43,"computed_at":"2026-11-02T06:13:15Z"}},"role":"Backend","role_family":"Backend","seniority":"senior","employment_type":"freelance","work_mode":"remote","remote_scope":"stated_countries","remote_scope_basis":"posting_text","remote_working_hours":null,"hiring_geo_confidence":"inferred","locations":["Berlin, Germany","Paris, France","London, United Kingdom","Munich, Germany","Hamburg, Germany","Frankfurt am Main, Germany","Birmingham, United States","Cologne, Germany","Hanover, Germany","Karlsruhe, Germany","Dortmund, Germany","Göttingen, Germany","Nuremberg, Germany"],"countries":["DE","FR","GB","US"],"hiring_countries":["DE","FR","GB"],"hiring_countries_total":3,"salary":null,"salary_estimate":{"min_usd":71000,"max_usd":144000,"period":"year","method":"role_seniority_country_remote_cell","sample_n":17},"experience_years_min":null,"visa_sponsorship":false,"relocation_package":false,"has_equity":false,"technologies":[{"name":"Kotlin","optional":false},{"name":"Rest API","optional":false}],"status":"live","first_seen_at":"2026-08-18T22:17:02Z","employer_posted_date":"2026-10-29","last_verified_at":"2026-11-02T16:27:34Z","board_verified":true,"closed_at":null,"days_open":75,"trust":{"level":"ok","repost_count":1,"flags":[],"days_open":75},"description":"Why voize? Because we’re more than just a job!\nAt 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.\nYour Mission\nAs 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.\nYour Daily Business - No two days are alike\nShape the future of our integrations - Develop interfaces that seamlessly connect voize with systems in the care and medical sector\n\nBuild future-proof solutions - Develop a scalable API, set industry standards, and work closely with partners and clients\n\nTake end-to-end ownership - From the idea and implementation to the ongoing development of our integrations\n\nArchitecture with foresight - Design thoughtful data models and sustainable solutions for complex systems\n\nWork with impact - Your work saves caregivers time, improves documentation, and supports people who do amazing work every day.\n\nYour Skillset - What you bring to the table\nSeveral years of experience in backend development and API integration\n\nExcellent proficiency with Kotlin\n\nAPI design and development with REST\n\nFluent in German (C1) to communicate effectively with partners\n\nWillingness and work authorisation to travel to Berlin (we cover your expenses!)\n\nCan work with us for minimum 3+ months\n\nReady to talk? 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