Technical Co-Founder | Digital Health / Medical Software | Full-Stack + FHIR

ONCOTrack is an early-stage digital oncology company developing technology to improve cancer care and support patients and healthcare professionals.We are now looking for a Technical Co-Founder to take long-term ownership of the technology and build the product alongside the founder.This is not a standard software engineering role and not primarily a management position. We are looking for a highly hands-on technical founder who can personally design and build the core platform end-to-end and grow with the company.What we are specifically looking forYou should have proven, demonstrable experience building real digital health or medical software.Strong candidates will be able to show a product they personally helped build and clearly explain what they implemented themselves.Essential requirementsProven experience building and delivering a digital health / medical applicationStrong hands-on full-stack development capabilityExperience building patient-facing web/mobile applicationsExperience building clinician dashboards or complex professional web applicationsBackend/API developmentDatabase architectureCloud infrastructure and deploymentAuthentication and authorizationRBAC and audit loggingSecure handling of sensitive health dataPractical understanding of GDPR and healthcare security requirementsHealthcare interoperability experience, preferably FHIR and/or HL7Ability to design a robust architecture that can evolve from MVP to production clinical softwareAbility and willingness to code personally, particularly during the early stages of the companyStrong technical ownership and entrepreneurial mindsetHighly desirableOncology softwarePatient-reported outcomes / ePRORemote patient monitoringClinical workflowsEHR integrationsFHIR R4HL7Swedish healthcare integrations such as COSMIC, TakeCare or similar EHR environmentsBankID or comparable secure identity solutionsExperience with regulated medical softwareISO 13485 / IEC 62304 / EU MDRPrevious startup or founding-engineer experienceEvidence matters more than titlesWe are not primarily looking for someone with the title CTO, VP Engineering or Tech Lead.We are looking for someone who can demonstrate:“I personally built this medical product, this was my technical contribution, this is how it was architected, and this is what reached production.”A strong builder with 7 years of experience and a proven healthtech product is potentially much more relevant than someone with 15 years of experience who has mainly managed engineering teams.This is a co-founder opportunityJoining as a co-founder is fundamentally different from joining as an employee.The person selected will potentially become a long-term partner in the company, share responsibility for major technical and strategic decisions and take ownership of the technical development of ONCOTrack.For that reason, technical capability alone is not enough.We are also looking for:long-term commitmentreliabilitytransparencystrong communicationability to work closely with a non-technical foundergenuine interest in improving cancer carefounder mentality rather than consultant mentalityThe co-founder relationship will be explored carefully before any long-term equity arrangement is finalized.Current stageONCOTrack already has an MVP/prototype and is moving toward the next stage of technical development and clinical validation.The company is based in Sweden and is engaging with the Swedish health innovation ecosystem.The next technical phase is focused on evolving the current MVP into a secure, scalable and clinically robust product.LocationStockholm / Sweden preferred, but exceptional candidates elsewhere in Europe — or internationally where practical — can be considered.Remote collaboration can be discussed.Mandatory application questionPlease describe one digital health or medical software product that you personally built. Include:What the product does Whether it reached production / real users Your exact technical contribution The technologies you personally implemented Whether you worked with FHIR, HL7, EHR integrations or sensitive patient data A link to the product, portfolio, GitHub, case study or other evidence where possibleApplications without a concrete example of a medical/healthtech product personally built may not be considered.