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I will convert webapp to secure multi tenant saas supabase rls with stripe ai next js
Leni H
About this gig
Your software worksbut it may not be ready to serve multiple businesses securely, manage subscriptions, or add AI without risking data leaks and billing problems.
I convert existing web apps and MVPs into secure, production-ready multi tenant SaaS platforms.
I can help you:
- Convert single-tenant software into multi tenant SaaS
- Build tenant isolation, organizations, workspaces and RBAC
- Secure Supabase/PostgreSQL with RLS and tenant-scoped APIs
- Add Stripe subscriptions, plans, trials and usage billing
- Build AI SaaS features, RAG, agents and usage limits
- Create super admin and tenant dashboards
- Add white-label branding, custom domains and subdomains
- Set up team invites, roles and permissions
- Integrate APIs, webhooks, CRM and automation
- Add audit logs, feature gating and plan-based access
- Migrate databases and users safely
- Deploy with Next.js, React, Supabase, Node.js or Vercel
- Test cross-tenant security and production readiness
Need SaaS migration, Supabase RLS fixes, Stripe SaaS billing or a complete AI multi tenant platform? I focus on secure architecture and a product you can confidently sell to multiple clients.
Message me with app, stack and goal.
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Get to know Leni H
Leni H
Automation Expert
- FromGermany
- Member sinceSep 2026
Languages
English
I help startups and businesses turn ideas into digital products that are simple to use, manage and grow. Whether you need a custom website, web app, multi-tenant SaaS platform or business system, I focus on solving the real problem behind the project not just writing code. I can plan, build, improve and connect the tools your business needs, from secure user accounts and payments to dashboards, automation and integrations. My goal is to deliver a robust, scalable solution that saves time, improves customer experience and supports long term growth, with clear communication from start to finish.
Other Website Development Services I Offer
FAQ
Can you convert my existing single-user or single-company app into a multi tenant SaaS without rebuilding everything?
Yes. I first review your current architecture, database, authentication and APIs, then determine what can be reused and what must be restructured for secure organizations, tenant i
How do you prevent one tenant from seeing another tenant’s data?
I implement tenant-scoped authorization at the database and API level using approaches such as Supabase/PostgreSQL RLS, tenant IDs, RBAC and server-side validation. I can also test for cross-tenant data leakage before delivery.
My app already uses Supabase. Can you audit or repair my RLS policies?
Yes. I can review Supabase Auth, RLS policies, storage permissions, JWT claims and organization access to identify insecure policies, missing restrictions or permission errors.
Should I use one shared database, separate schemas or a database per tenant?
It depends on your scale, compliance requirements, budget and isolation needs. I can recommend the best architecture instead of forcing one model on every SaaS project.
Can one user belong to multiple organizations or workspaces?
Yes. I can build organization switching, memberships, invitations and roles such as Owner, Admin, Manager, Member or custom permissions while keeping each workspace isolated.
How will Stripe subscriptions connect to tenants and SaaS plans?
I can connect Stripe billing to organizations, plans, trials, upgrades, downgrades, cancellations, webhooks and feature access so each tenant receives the functionality included in its
Can you add usage-based billing instead of only fixed monthly plans?
Yes. Your SaaS can track API calls, AI tokens, credits, documents, seats, voice minutes or other usage and connect those limits to billing or plan entitlements.
Can you add AI without allowing one customer’s data to leak into another customer’s AI results?
Yes. AI features can be tenant-aware so prompts, documents, embeddings, RAG knowledge bases, conversation history and usage remain scoped to the correct organization.
Can every tenant have its own logo, branding, subdomain or custom domain?
Yes. I can implement white-label settings, tenant-specific branding, subdomains and custom domains, including the routing and SSL architecture required for a scalable setup.
My app was built with Lovable, Bolt, Replit, Cursor or AI-generated code. Can it still be converted into production SaaS?
Usually yes. I review the generated code, database and security first. I can then restructure weak areas, improve authentication, add RLS, billing, organizations and production
