SaaS Application Development Company — B2B SaaS, Multi-Tenant Architecture & Stripe Billing
1Solutions builds B2B and B2C SaaS products — multi-tenant architecture (PostgreSQL RLS, schema-per-tenant), Stripe subscription billing, SSO/SAML enterprise auth, self-serve onboarding, integrations marketplace, white-labelling, and SOC 2 compliance. 80+ SaaS products shipped. 15+ years.
What We Build for SaaS Companies
SaaS MVP, multi-tenancy architecture, Stripe billing, onboarding flows, integrations, white-labelling, analytics, admin tooling, performance, and SOC 2 compliance engineering.
SaaS Product Architecture & MVP
Greenfield SaaS product design and MVP — multi-tenant architecture selection (shared schema, schema-per-tenant, DB-per-tenant), technology stack choice (Next.js, Node.js, PostgreSQL, Redis), auth system (magic link, SSO/SAML, Google OAuth), subscription billing integration (Stripe), CI/CD pipeline, and deployment on AWS or GCP. MVP shipped in 10–14 weeks.
Multi-Tenant Architecture
Robust multi-tenancy implementation — row-level security (RLS) in PostgreSQL, tenant context middleware, data isolation testing, cross-tenant query prevention, tenant onboarding automation, subdomain routing per tenant, custom domain mapping, tenant-level feature flags, and zero-downtime tenant migration scripts. Passes SOC 2 and ISO 27001 audits.
Subscription Billing & Metering
Stripe-powered subscription billing — plan and pricing management, free trial with card capture, usage-based billing (metered API calls, seats, storage), dunning management (failed payment recovery), coupon and promotion engine, invoice generation and PDF download, upgrade/downgrade proration, tax calculation (TaxJar / Stripe Tax), and MRR/ARR revenue dashboard.
SaaS Onboarding & Activation Flow
Self-serve onboarding that converts — product tour (Intercom or custom), progressive disclosure of features, in-app task checklist, email drip onboarding sequence, sample data pre-population, invite team members flow, CSV import wizard, and activation event tracking (segment the users who complete key actions within 7 days vs those who churn).
Integrations Marketplace / API Platform
Third-party integrations and API-first architecture — OAuth 2.0 integration framework for Slack, HubSpot, Salesforce, Zapier, and custom webhooks; public REST and GraphQL API with API key management and rate limiting; developer documentation portal (Swagger/Redoc); webhook retry logic and event log; and an in-app integrations marketplace page for marketing discoverability.
White-Label SaaS Platform
White-labelling for resellers and enterprise clients — custom subdomain and custom domain per client, logo and colour theme per tenant, email white-labelling (custom SMTP), removal of product branding, reseller pricing overrides, reseller admin panel with client management, and branded onboarding flows. Full audit trail for reseller compliance.
SaaS Technology We Use
React/Next.js, Node.js/NestJS, PostgreSQL with RLS, Stripe, Auth0/Clerk, Kubernetes, Segment, and the full modern SaaS stack.
How We Work with SaaS Companies
Full SaaS product build, scale and modernisation engineering, or independent technical audit — matched to your product stage.
- Founders building a B2B SaaS product to validate PMF
- Agencies building a white-label SaaS to package their services
- Enterprise software vendors launching a cloud SaaS offering
- Startups with funding ready to build beyond an MVP prototype
- SaaS products growing past 1,000 tenants with shared-schema strain
- Products needing enterprise-grade SSO/SAML and SCIM for upmarket deals
- SaaS hitting database performance bottlenecks under load
- Products preparing for SOC 2 Type II or ISO 27001 audit
- Investors running technical due diligence pre-Series A/B
- Founders preparing for a strategic acquisition process
- SaaS companies assessing offshore or agency-built code quality
- Products planning a SOC 2 audit with no current compliance baseline
SaaS Clients
Founders and CTOs on building SaaS products with 1Solutions.
1Solutions built our B2B HR SaaS product from scratch — multi-tenant PostgreSQL architecture, Stripe subscription billing with usage-based pricing, SSO/SAML integration for enterprise clients, and a self-serve onboarding flow that reduced time-to-activation from 3 days to 4 hours. We hit $1M ARR within 18 months of launch. Exceptional SaaS engineering team.
We had a SaaS product built by a local agency that could not handle more than 200 concurrent users. 1Solutions diagnosed the shared-schema multi-tenancy issues, re-architected the database layer with proper RLS, introduced Redis caching, and migrated us to Kubernetes. We now handle 5,000 concurrent users without breaking a sweat. Outstanding engineering.
1Solutions built our integrations marketplace — OAuth 2.0 connections to Salesforce, HubSpot, Slack, and Zapier, a developer API with rate limiting and key management, and a public docs portal. Integrations became our highest-cited reason for choosing us over competitors. Three enterprise deals closed specifically because we had the Salesforce integration.
Why SaaS Companies Choose 1Solutions
80+ SaaS products shipped — multi-tenancy depth, Stripe billing complexity, enterprise SSO/SOC 2, product-led thinking, integrations ecosystem, and validated scale engineering.
80+ SaaS Products Shipped
HR SaaS, CRM, project management, marketing automation, LMS, FinTech SaaS, field service management, and API-first platforms — 80+ SaaS products across B2B and B2C categories over 15+ years.
Multi-Tenancy Architecture Expertise
Shared schema with RLS, schema-per-tenant, and database-per-tenant — we know the trade-offs in depth and select the right model for your compliance requirements, tenant count, and cost constraints.
Stripe Billing Complexity
Beyond the Stripe quick-start — usage metering, seat-based pricing, volume tiers, proration edge cases, dunning and retry logic, revenue recognition, and MRR/ARR dashboards that map to investor reporting requirements.
Enterprise Readiness (SSO, SCIM, SOC 2)
The deals that push SaaS ARR over $1M typically require SSO/SAML, SCIM provisioning, audit logs, and SOC 2. We build these capabilities early so they are not blockers when the enterprise contract arrives.
Product Thinking, Not Just Engineering
We engage with your GTM context — ICP, pricing model, churn drivers — and build product features that map to business outcomes (activation rate, feature adoption, expansion revenue) rather than just shipping tickets.
Self-Serve Onboarding Depth
We have built onboarding flows for dozens of SaaS products. We know that the fastest path to activation includes progressive disclosure, smart defaults, pre-populated sample data, and an in-app checklist that drives users to the key "aha moment."
Integrations & Ecosystem Strategy
Zapier, Make, and OAuth 2.0 integration framework — plus native Slack, HubSpot, Salesforce, and CRM integrations. An integrations strategy is often the difference between a product that is embedded in the customer workflow and one that is churned.
Performance at Scale Validated
We load-test SaaS products to multiples of expected peak before launch. We have migrated SaaS products from shared hosting to multi-region Kubernetes clusters with zero downtime — database migrations included.
Build Your SaaS Product
Share your SaaS requirements and we will respond within 24 hours with a proposal, architecture recommendation, and team composition.
Technical proposal within 24–48 hours
SaaS architects with 80+ products shipped
NDA signed before any technical discussions
Multi-tenant, Stripe billing, SSO, SOC 2 specialists
MVP in 10–14 weeks; full v1 in 5–7 months
Tell Us About Your SaaS Product
SaaS Development — FAQ
Multi-tenancy, Stripe billing, SSO, SOC 2, and SaaS architecture questions answered.