B2B SaaS platforms selling to agencies and enterprise customers frequently need white-label branding, wildcard subdomains (`tenant.yourapp.com`), and customer-owned vanity domains (`portal.clientcompany.com`)—and search to hire a freelance multi-tenant B2B SaaS & custom domain programmer. I am Aldian Fazrihady, a Senior Freelance Full Stack Developer available via Upwork.
Core Multi-Tenant & White-Label SaaS Capabilities
- Automated Custom Domains & On-Demand TLS: Architecting Cloudflare for SaaS (Custom Hostnames), Caddy On-Demand TLS, and Next.js / Django host-header middleware so customers can connect their own CNAME domains with automatic SSL provisioning.
- Strict Tenant Isolation (PostgreSQL RLS vs Schema-per-Tenant): Enforcing cryptographic tenant context from edge middleware down to PostgreSQL Row-Level Security (`app.current_tenant_id`).
- Dynamic White-Label Theming & Email Domains: Supporting per-tenant logos, WCAG-accessible CSS variable color palettes, and custom DKIM/SPF transactional email sending domains (Resend / AWS SES / Postmark).
Frequently Asked Questions
How do you verify DNS ownership when a SaaS customer adds a custom domain?
I implement automated TXT/CNAME DNS polling workers and Cloudflare Custom Hostname APIs that provision Let's Encrypt TLS certificates automatically once the customer's DNS record propagates.
How can we hire you as a freelance multi-tenant SaaS programmer?
Contact me on Upwork.