SaaS & Web Applications

SaaS development is about building subscription-based software that users rely on continuously, not a one-time website or a simple web app. A SaaS product manages accounts, permissions, data isolation, and recurring payments across many customers at once. This is known as multi-tenancy—your platform serves multiple businesses or users while keeping their data separate and secure.

Unlike regular websites, SaaS products must handle onboarding, billing cycles, upgrades, cancellations, and long-term maintenance. These are business-critical systems, not just interfaces.

I build SaaS platforms that cover the full product lifecycle. Projects can include secure user authentication with email/password, OAuth, and social logins; subscription management with Stripe; and database structures designed for multi-tenant data. Admin dashboards allow you to manage users, plans, and usage without manual work.

Email notifications and onboarding flows guide users through signup, activation, and billing events. APIs are built to support integrations with third-party services or future mobile and partner applications. Built to add features without rebuilding the foundation.

This service is for SaaS founders building an MVP that is meant to become a real product, not a disposable prototype. It also fits businesses launching subscription platforms or internal SaaS tools that replace spreadsheets or manual workflows. Common use cases include productivity tools, B2B platforms, analytics dashboards, and subscription-based services.

FlowMate—the SaaS platform I built for email management—handles multi-provider authentication, async processing (background tasks that don't slow down the UI), AI integrations, and Stripe subscriptions at production scale. It demonstrates how these systems work together in a real product.

You work directly with one developer, without agency handoffs or junior teams. The focus is production-ready code from day one, so the platform does not need rebuilding after validation. TypeScript is used across the stack to reduce runtime errors and support long-term scalability. Applications are deployed on modern infrastructure such as Vercel, Supabase, or AWS, depending on requirements. The goal is a SaaS platform ready for real users and steady growth.

Based in Częstochowa, Poland. Available for SaaS projects across Poland and internationally.