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Next.js SaaS Boilerplate: Auth, Billing, Admin & Multi-Tenancy
Employer
Dmytro Koval (demo account)
Project parameters
Type of cooperationOne-time project
SectionWeb development
Prepaymentwithout prepayment
Payment methodsCash, Bank transfer
Acceptance of requestsfrom yesterday, 21:50 until Aug 31, 2026
Project description
We are launching a new B2B SaaS product and want to start from a solid, feature-complete boilerplate rather than a throwaway demo. The idea is that our team builds actual product features on top of this starter, so it has to be production-ready from day one: real authentication, real billing, real multi-tenant data isolation, and the plumbing that every serious SaaS needs but nobody enjoys rebuilding. We are looking for a developer who has assembled this kind of foundation before and knows the decisions that are expensive to get wrong.
The scope covers the whole backbone. Authentication and roles come first — NextAuth.js v5 with email, Google and GitHub, verification and password reset, and a Super Admin / Org Admin / Member hierarchy with session handling. Multi-tenancy sits underneath everything: users belong to organizations, tenant tables carry an org_id, and there is a clean email invitation flow. Billing runs on Stripe with monthly and annual plans, a trial, webhook handling, seat-based metering and a self-service customer portal. A super-admin panel gives us org management, user impersonation, feature flags and metrics like MRR and churn.
Infrastructure ties it together with Prisma and PostgreSQL, Resend for transactional email, a Vercel deployment config, GitHub Actions CI running lint, typecheck and Vitest, and feature flags via Vercel Edge Config. The stack is TypeScript throughout. Budget is 420 USD fixed over 18 days. Deliverables and detailed modules below.
Core Modules
1. Authentication & Authorization
— NextAuth.js v5 with email/password, Google, GitHub providers
— Email verification and password reset flow
— Role-based access: Super Admin / Org Admin / Member
— Session management with refresh token rotation
2. Multi-Tenancy
— Organization model: each user belongs to one org
— Data isolation at DB level (org_id on all tenant tables)
— Invitation flow: email invite, accept, join org
— Org settings page: name, logo, billing, members list
3. Billing & Subscriptions
— Stripe Billing: monthly/annual plans, free trial
— Webhook handler: checkout.session.completed, subscription events
— Usage metering (seats-based)
— Customer portal for self-service billing
— Upgrade/downgrade/cancel flows
4. Admin Panel
— Super admin: manage orgs, impersonate users, feature flags
— Usage metrics: MRR, churn, active users
— Email broadcast to segments
5. Infrastructure
— Prisma ORM + PostgreSQL
— Resend for transactional email
— Vercel deployment config
— GitHub Actions CI: lint, typecheck, tests (Vitest)
— Feature flags via Vercel Edge Config
Deliverables: private GitHub repo, full README with local setup, production checklist.
Budget: 420 USD fixed. Timeline: 18 days.
The scope covers the whole backbone. Authentication and roles come first — NextAuth.js v5 with email, Google and GitHub, verification and password reset, and a Super Admin / Org Admin / Member hierarchy with session handling. Multi-tenancy sits underneath everything: users belong to organizations, tenant tables carry an org_id, and there is a clean email invitation flow. Billing runs on Stripe with monthly and annual plans, a trial, webhook handling, seat-based metering and a self-service customer portal. A super-admin panel gives us org management, user impersonation, feature flags and metrics like MRR and churn.
Infrastructure ties it together with Prisma and PostgreSQL, Resend for transactional email, a Vercel deployment config, GitHub Actions CI running lint, typecheck and Vitest, and feature flags via Vercel Edge Config. The stack is TypeScript throughout. Budget is 420 USD fixed over 18 days. Deliverables and detailed modules below.
Core Modules
1. Authentication & Authorization
— NextAuth.js v5 with email/password, Google, GitHub providers
— Email verification and password reset flow
— Role-based access: Super Admin / Org Admin / Member
— Session management with refresh token rotation
2. Multi-Tenancy
— Organization model: each user belongs to one org
— Data isolation at DB level (org_id on all tenant tables)
— Invitation flow: email invite, accept, join org
— Org settings page: name, logo, billing, members list
3. Billing & Subscriptions
— Stripe Billing: monthly/annual plans, free trial
— Webhook handler: checkout.session.completed, subscription events
— Usage metering (seats-based)
— Customer portal for self-service billing
— Upgrade/downgrade/cancel flows
4. Admin Panel
— Super admin: manage orgs, impersonate users, feature flags
— Usage metrics: MRR, churn, active users
— Email broadcast to segments
5. Infrastructure
— Prisma ORM + PostgreSQL
— Resend for transactional email
— Vercel deployment config
— GitHub Actions CI: lint, typecheck, tests (Vitest)
— Feature flags via Vercel Edge Config
Deliverables: private GitHub repo, full README with local setup, production checklist.
Budget: 420 USD fixed. Timeline: 18 days.
