ProjectsProject DetailSaaS Product2026
Project Detail
Apna Contacts
A security-first multi-tenant contact vault for families and small businesses—owner CRUD, view-only members, and passworded guest share links.
The Brief
One private vault for every important number.
Apna Contacts is a private shared phone book built so households and shops stop chasing numbers in group chats. Owners keep named vaults (home, shop, family), invite trusted people as view-only members, and issue guest links when relatives only need a quick lookup.
The product story is access control: full CRUD for owners, authenticated read-only for members, and account-free guest sessions behind optional passwords—backed by Next.js Server Actions, Supabase Auth, and Postgres RLS.
Technical Architecture
Next.js
App Router product with React Server Components, Server Actions, Zod validation, and a mobile-first contact UI.
Supabase
Auth, Postgres, and RLS for multi-tenant workspaces—plus SECURITY DEFINER RPCs for guest reads with no anon table grants.
Guest sessions
HMAC-signed HTTP-only cookies, rate-limited share passwords, and middleware that confines guests to read-only routes.
Designed for lookup under pressure
The vault UI follows familiar phone-contact patterns—search first, All / Favorites / Recent tabs, and one-tap call, WhatsApp, and copy—so family and staff can find a number fast without learning a new CRM.
Access model
Owner · Member · Guest
Core surfaces
Vaults · Contacts · Share links
Role
Full Stack Product Engineer
Client
Personal product / SaaS build
Date
2026
Collaborators
Solo build
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