Abstract Population ageing increases demand for trustworthy, usable home support. Many older adults wish to remain independent, yet face risks from falls, chronic conditions and social isolation, while commercial smart‑home offerings are siloed, cloud‑dependent, or not designed for accessibility. This thesis presents DORA, a voice‑first, edge‑executed well‑being platform that integrates four capabilities—Home Safety (HS), Health Monitoring (HM), Smart‑TV Interaction (TV) and Tele‑Assistance (TA)—within a privacy‑preserving microservice architecture. We contribute three results. (i) We elicit requirements from elder, caregiver and remote‑operator personas and derive domestic specifications that prioritise edge responsiveness, accessibility, data minimisation and auditability. (ii) We design a microservice architecture with clear, domain‑oriented service boundaries (notification, HM, HS, TV, TA), versioned MQTT event schemas and a defence‑in‑depth model that keeps biometric data on premises by default and, under explicit authorisation with purpose and bounded time, supports standards‑based exports (e.g., HL7 FHIR).