SaaS platforms
Your own online product that customers pay for monthly. Authentication, payments, and full service, ready from day one.
Transparent Investment Ranges // Engineering Standard
A fixed price agreed before work begins, based on the audit. No hidden costs or endless hourly billing.
The first tangible production result in your business. I focus on one critical process, eliminating risk and delivering working software in a fraction of the usual time.
- Multi-tenant architecture with data isolation
- Recurring subscription support with Stripe / LemonSqueezy
- Authentication and organization management system
- 30-day stability warranty and post-launch support
A comprehensive platform for the entire organization. Advanced decision loops, deep two-way database integrations, complete audit logging, and dedicated engineering support under an SLA.
- Multi-tenant architecture with data isolation
- Recurring subscription support with Stripe / LemonSqueezy
- Authentication and organization management system
- Automatic invoicing and transactional notifications
- MRR, churn, and activity analytics dashboard
- Priority SLA, 24/7 monitoring, and architect support
SaaS Systems & MVP Prototypes in practice
Engineering approach and system architecture
I solve business problems by starting with the process. No rigid ready-made templates: I build software around your procedures.01 // MODULE
Everything a Running SaaS Needs
I do not sell templates; I build a complete platform tailored to your business model. Authentication and roles: email/password login, Google and GitHub OAuth, user roles, and granular permissions.
Secure sessions and token refresh from day one. Subscriptions. Stripe integration: monthly and annual plans, invoices, a card-free trial, and proration when changing plans.
Automatic renewals and failed-payment handling. Admin panel. User management, activity metrics, and global settings.
Full visibility across your SaaS in one dashboard, without writing SQL by hand. APIs and integrations: REST API with OpenAPI documentation, webhooks for key events, and separate API keys for each company using the system.
Ready to integrate with the client's external systems.
02 // MODULE
From When to When
A predictable rhythm: you know what you will receive and when, with no scheduling surprises. Weeks 1–2: Authentication + database. Registration, login, OAuth, user roles, and a database prepared for multiple companies using the system.
The foundation supporting the entire SaaS. Week 3–4 Core features The product's main features: dashboard, resource CRUD and user dashboard.
The first working version with a complete flow. Weeks 5–6: billing and onboarding. Stripe plans, subscriptions, webhook events, and invoices.
Step-by-step onboarding for new users. Week 7+: testing and launch. End-to-end testing, load testing, and security hardening.
Production deployment with monitoring and CI/CD.
03 // MODULE
Indicative budget
Pricing depends on feature scope and domain complexity. After a free call, you receive a concrete figure. Prices current as of September 2026.
SaaS MVP PLN 25,000–60,000. Authentication, subscriptions, core features, admin panel.
Ready for paying customers. Enterprise SaaS 80,000–200,000
PLN Advanced architecture, SSO, audit logging, SLA, and full API documentation. SaaS overview
04 // MODULE
A platform with customer accounts and billing
This is the SaaS service: roles, subscriptions, payments, and an admin panel. B2B dashboards without billing belong to custom software development.
05 // MODULE
Let's Talk About Your SaaS
Tell us about your idea. I will come back with a specific scope proposal and price within 24 hours.
No obligation. Request a quote All services SaaS systems
What You Receive with the Implementation:
- Multi-tenant architecture with data isolation
- Recurring subscription support with Stripe / LemonSqueezy
- Authentication and organization management system
- Automatic invoicing and transactional notifications
- MRR, churn, and activity analytics dashboard
Technologies and production standards:
I choose technologies for stability, speed, and reliability. No technical debt.
SaaS Systems & MVP Prototypes
FAQ
Frequently asked questions about SaaS systems & MVP prototypes: architecture, implementation, data security, costs, and technologies:
01 What does the SaaS platform you build include? +
Authentication and roles: email/password login, Google and GitHub OAuth, and granular permissions; Stripe subscriptions; an admin panel with user management and activity metrics; and a REST API with OpenAPI documentation, webhooks, and separate API keys for each company using the system.
02 How long does building a SaaS system take? +
Weeks 1–2 cover authentication and the foundation for multiple companies using the system. Weeks 3–4 cover core features: dashboard, resource management, and user panel. Weeks 5–6 cover billing and onboarding. From week 7, the work includes end-to-end testing, load testing, security hardening, and production deployment.
03 How much does a SaaS system cost? +
A SaaS MVP with authentication, subscriptions, core features, and an admin panel costs PLN 25,000–60,000. Enterprise SaaS with advanced architecture, SSO, audit logging, an SLA, and complete API documentation costs PLN 80,000–200,000. Pricing depends on the feature scope and domain complexity: after a free conversation, you receive a concrete figure.
04 How do billing and subscription management work? +
I integrate Stripe: monthly and annual plans, invoices, card-free trials, prorated plan changes, automatic renewals, and failed-payment handling.
05 Will the architecture handle growth in user numbers? +
The goal is an architecture that does not need rewriting as users, customer companies, integrations and production data grow. The multi-company database schema is built in the first phase. Before launch, I run end-to-end tests, load testing and security hardening, with monitoring and CI/CD after deployment.
06 Can the SaaS integrate with customers' systems? +
Yes. I provide a REST API with OpenAPI documentation, webhooks for key events, and separate API keys for each company using the system, ready to integrate with the customer's external systems.
Start building.
First conversation free.
A free 30-minute technical consultation. After the call, I will provide an architecture proposal, timeline and transparent quote within 24 hours.