Tenant isolation done properly
tenant_id modelling with PostgreSQL row-level security and per-tenant data boundaries, so one customer can never see another’s data.
Methodspire
SAAS PLATFORM DEVELOPMENT
SaaS platforms built to run in production.
Multi-tenant architecture, billing, permissions, integrations and the operational details that decide whether a SaaS product survives real customers. Work directly with the architect who writes and reviews the code.
Who this is forFounders and product teams who need a SaaS product designed, built, completed or hardened by a senior engineer rather than a rotating team.
What you get
Roles, permissions and audit trails
RBAC, 2FA and audit logs designed in from the start, not bolted on before launch.
Subscriptions and payments
Subscription lifecycle, recurring billing, tokenized payments, webhooks and idempotency so retries never double-charge.
Integrations that survive change
REST, GraphQL and webhook integrations, plus adapters for legacy systems, with retries and monitoring.
How we work
- Discovery and architectureWe agree scope, constraints and a written architecture before development starts.
- Milestone deliveryWorking software is delivered in milestones with acceptance criteria, so you review real progress.
- Hardening and handoverTests, deployment pipeline, documentation and a clear ownership handover.
Relevant experience
- Enterprise multi-channel SaaS platform: architect and lead developer, built for real business operations.
- Multi-tenant SaaS combining CRM, an AI agent and WhatsApp automation.
- FinTech SaaS completed and hardened for production: JWT and 2FA, subscriptions, payments, background jobs and automated tests.
Client names are withheld; projects are described by the system built.
Technologies
- Next.js
- React
- TypeScript
- NestJS
- Python / FastAPI
- Django
- .NET
- PostgreSQL / Supabase
- Redis
- Docker
- CI/CD
Common questions
Can you take over an existing SaaS codebase?
Yes. I start with a code and architecture review, then agree a focused plan to complete or stabilize it without rewriting what already works.
Do you work with U.S. time zones?
I am based in Israel and work remotely with U.S. and international clients. We agree overlap hours and written review points up front.