SaaS
We design and develop SaaS applications built for many customers, recurring payments and further growth. We start with discovery and a well-defined MVP, and take care of architecture, data security, onboarding and subscription mechanics from the very beginning.
Companies that trusted us
The basics
What sets a SaaS platform apart from a regular app?
SaaS is software sold on a subscription basis and used by many customers at once on a single installation. The difference from custom-built software isn't about features, but about the fact that from day one you have to solve things a single-client app doesn't have: separating data between companies, accounts and permissions, self-service sign-up, recurring payments and what happens when a card charge fails. This is the part most often overlooked in estimates. The product idea itself may be simple; "serve a thousand companies at once, each with its own data and its own pricing" is not.
The second element is that SaaS is never finished. Customers pay every month and every month decide whether it's worth it. A build budget without a budget for development over the following quarters is the most common reason products launch and then go quiet.
See a selection of projects we delivered
A home-cooked meals marketplace with Wolt delivery – selling your own food legally
Client: HomeChefs
Industry: Food Industry / FoodTech
Moving from mobile to web without losing users or business logic
Client: SkinApe
Industry: Entertainment / GameTech
„From the first contact, the team was very professional and the collaboration ran smoothly — daily contact on Slack and weekly online meetings meant we knew exactly what the team was working on.”
Michał Słotwiński — Head of Customer Success, Semcore
Review from Clutch
How we work
From the first version to the first paying customers
We start by narrowing things down: one audience, one problem, one path that has to work flawlessly. The first version should answer the question of whether anyone will pay — not show everything you're planning. Then we build the core along with everything the subscription model requires: sign-up, plans, recurring payments, cancellation handling. In parallel, we put in place the foundations you can't run a product without — logs, monitoring, usage metrics.
On your side are knowledge of your audience and the decision on the pricing model. On our side are architecture, development, deployment and either handover or ongoing development.
The timeline depends on the number of roles and how much the plans differ from each other. Three plans that differ by limits are simple; three that differ by available features multiply the number of states to test.
Decisions
Decisions that set your costs for years to come
How to separate customer data. A shared database filtered by company is cheaper and easier to maintain; a separate database per customer gives stronger isolation and is sometimes required in regulated industries. It's an architectural decision, and changing it later means migrating all customers at once.
Pricing model. Per user, usage-based or flat rate — this isn't just a commercial question, because it determines what the system has to measure and display. Usage-based billing requires a reliable meter from day one.
What you do when a payment fails. Cut off access immediately, after a week, or limit features. Without a decision, someone will be handling every case by hand.
What not to do. Don't build every plan before you have your first customer. Don't put off usage metrics — without them, product development runs on gut feeling. And don't assume you can add data separation later; it's the foundation, not a finishing layer.
Scope
A SaaS product from MVP to scale
We cover the full scope: discovery and defining the MVP, interface design, a multi-tenant backend, customer and admin dashboards, sign-up and login, plans and recurring payments, integrations with the tools your customers use, deployment and maintenance. We usually write the front end in Next.js and the backend in Node.js, store data in PostgreSQL, handle subscriptions through Stripe and deploy everything in containers. We choose the stack based on what the product needs to do in three years — not just for the first version.
Architecture
Multi-tenancy, billing and what only shows up as you grow
Multi-tenancy isn't a single feature but a set of assumptions running through the whole system: data isolation, roles and permissions, per-plan limits, separate settings for each customer. Designed once, they cost what they should. Retrofitted at the twentieth customer, they cost many times more — and require downtime. Then there's the infrastructure no serious SaaS can run without: monitoring, backups with tested restores, zero-downtime deployments and a test environment where you can experiment safely.
We also prepare the materials your customers' security teams ask for: an architecture description, procedures, a retention policy and a data processing agreement.
For enterprise customers, we add corporate single sign-on (SSO) and a portal where they manage users, invoices and their plan themselves.
Growth
Onboarding, metrics and the iteration loop
SaaS lives on retention: we measure activation (whether new users get to the value), cohort retention and drop-off points. We treat onboarding as a product feature — the first few minutes decide whether a trial turns into a subscription. We iterate based on product data, not on roadmap wish lists.
The team stays with the product after launch: fixes, new modules and changes driven by data rather than by a year-old roadmap. We've been developing our longest-running products for years, with the same team that built them.
FAQ
Questions we hear before building a SaaS product
- The cost depends mainly on the MVP scope, the number of user roles, the subscription model, integrations and security and scaling requirements. That's why we define the key processes and features of the first version before quoting. It keeps the launch cost down and avoids building things that aren't needed yet.
- The timeline depends on the product scope and complexity. The fastest to launch is an MVP focused on one audience and one core process. Additional roles, integrations, a full-featured billing system or advanced security requirements all add time.
- An MVP should let a user complete the most important process from start to finish and get real value from the product. It usually covers basic account management, the core business feature and the elements needed to test the payment model. Additional features can be built after collecting initial data and user feedback.
- The key elements are a well-designed architecture, data isolation, a roles and permissions system, and a way to manage plans and limits. These decisions are best made at the start of the project, because changing them later can require significant system rework.
- After launch, continued product development begins: monitoring performance, handling support requests, analyzing user behavior, improving onboarding and rolling out new features. We can take responsibility for both platform maintenance and its further development.
- You do. We hand over the repository, infrastructure and documentation, and the product can be developed further with us or with your own team. For SaaS this matters more than anywhere else: the value of the product grows over years, and dependence on a single vendor is a real risk — including in the eyes of investors.
- The recurring payment itself is quick to implement. What's harder is everything around it: mid-period plan changes with proportional billing, account suspension, retrying a failed charge, an expired card, a refund, invoices and VAT for cross-border sales. We design each of these cases upfront, because an unhandled one means a customer conversation that someone has to handle manually.
- Yes, that's a common scenario. We start with a review: what works where, how customer data is separated, what's covered by monitoring, what happens in case of failure. Only then do we set the scope and cost of further development — for both parties it's fairer to know this before signing a contract than after.
