Web applications and SaaS platforms
Gjethe builds web applications and SaaS products: multi-tenant platforms with sign-up, workspaces and roles, subscription billing through Stripe or Paddle, dashboards and reporting, admin panels for your team, public APIs and the marketing site around it all, on Next.js, Node.js and PostgreSQL. Pricing is based on your project and agreed in your quote.
- Free first consultation
- Written quote for your project
- Flexible payment milestones
At a glance
- Architecture
- Multi-tenant SaaS or single-company apps
- Billing
- Stripe, Paddle, Lemon Squeezy
- Stack
- Next.js, Node.js, PostgreSQL
- Pricing
- Quoted per project
Definition
What is web applications & SaaS?
A web application is software that runs in the browser and lets users log in and work with their own data; a SaaS (software as a service) product is a web application sold on subscription to many customers from one shared platform.
Building a SaaS product means building two things: the product your customers use and the machinery around it, accounts, billing, permissions, onboarding, emails, support tools and analytics. That machinery is invisible when it works and painful when it doesn't. We build both, so you can focus on what makes your product different.
Who is it for?
Founders building a SaaS product
You have an idea or a validated MVP and need a production-ready product with billing, accounts and room to grow.
Businesses productising a service
You deliver something manually today (reports, analyses, bookings) and want customers to self-serve through software.
Companies needing a customer platform
Customers should log in to manage orders, data or services without emailing your team.
SaaS teams needing extra capacity
Your engineers own the core; you need a team to build a defined area such as billing, admin or a new module.
What's included, and what you keep
What's included
- Product scoping and feature prioritisation
- UX and UI design for the application
- Authentication, invitations and password reset
- Workspaces, teams and role-based permissions
- Subscription billing, trials and customer portal
- Core product features
- Admin panel for your team
- Transactional emails and in-app notifications
- Usage analytics and product events
- Public or internal API
- Automated testing and CI/CD
- Deployment, monitoring and error tracking
What you receive
Handed over at the end. Yours to keep.
- Production application on your cloud account
- Source code and infrastructure configuration
- Admin panel and billing set-up
- API documentation, if applicable
- Architecture and deployment documentation
- Design system and Figma files
Website or web application: which do you need?
| Website | Web application | |
|---|---|---|
| Main job | Inform and convince visitors | Let users log in and get work done |
| Typical users | Anonymous visitors | Customers, staff or members with accounts |
| Data | Content from a CMS | Per-user data in a database |
| Examples | Company site, landing page, blog | Dashboard, booking system, SaaS product |
What does multi-tenancy mean for your product?
Multi-tenant SaaS serves many customers from one application while keeping each customer's data strictly separate. Getting this right early matters, because retrofitting it later touches every query and screen.
We design the data model around workspaces or organisations from the first day, enforce separation in the database layer rather than relying on screens to hide data, and test it explicitly. Per-customer settings, branding and limits then become configuration rather than code.
The same foundations support pricing plans: features and limits are tied to a subscription, so changing your pricing later doesn't require rewriting the product.
SaaS foundations we build in from the start
- Workspace-level data separation
- Plans, limits and feature flags tied to billing
- Failed-payment handling and dunning emails
- Audit logs for admin actions
- Data export for customers
- Rate limiting on APIs
- Error monitoring and uptime alerts
- GDPR-ready data deletion
What kinds of web applications do we build?
SaaS products
Subscription software sold to many customers, with workspaces, plans and self-service onboarding.
Customer portals
Logged-in areas where clients manage orders, documents, bookings or support requests.
Booking and scheduling systems
Availability, reservations, reminders and payments for services, rooms or equipment.
Marketplaces
Two-sided platforms connecting buyers and sellers, with listings, messaging and payouts.
How web applications & SaaS works, step by step
Every step has a clear output you can review. Timing is agreed in your quote.
- 1
Product definition
Who the users are, the jobs they hire the product for, and the features that make version one valuable.
- 2
Architecture
Data model, tenancy, billing model and integrations designed before development.
- 3
UX design
Key flows (onboarding, the core task, settings and billing) designed and tested in Figma.
- 4
Build in increments
Working software demonstrated regularly, starting with the core workflow.
- 5
Harden for launch
Security review, performance testing, monitoring and billing edge cases.
- 6
Launch and iterate
Release, analytics on real usage and a prioritised list for the next version.
Tools, and what shapes your quote
Pricing is based on your project and agreed in your quote. These are the things that move it.
| Factor | Why it matters |
|---|---|
| Core feature complexity | The product's main workflow (scheduling logic, document processing, real-time collaboration) usually drives most of the effort. |
| Tenancy and roles | Multi-tenant SaaS with several roles per workspace needs more architecture than a single-company tool. |
| Billing model | Usage-based pricing, seats and add-ons need more logic than a single flat plan. |
| Integrations | Each third-party service the product connects to adds work and ongoing maintenance. |
| Real-time features | Live updates and collaboration require additional infrastructure. |
| Compliance | Healthcare, finance or enterprise customers may require extra security controls and documentation. |
| Area | Tools |
|---|---|
| Application | Next.js, React, TypeScript, TailwindCSS, shadcn/ui |
| Back end & data | Node.js, PostgreSQL, Prisma, Drizzle, Redis |
| Auth & billing | Auth.js, Clerk, Stripe, Paddle |
| Email & messaging | Resend, Postmark, WebSockets |
| Operations | Vercel, AWS, Sentry, GitHub Actions |
Common mistakes to avoid
What we see go wrong most often, and how a good project avoids it.
Building billing last
Plans, limits and payment failures affect the whole product. Designing them late leads to awkward rewrites.
Skipping the admin panel
Without internal tools, every customer request becomes a database query for a developer.
No product analytics
If you don't track activation and retention from launch, you can't tell which features matter.
Over-engineering for scale
Most products need a clean, simple architecture for their first thousand customers, not microservices.
Weak onboarding
Users who don't reach value in their first session rarely return. The first-run experience deserves design time.
Frequently asked questions
Can you build an MVP first and extend it later?
Yes, and we usually recommend it. See MVP development. We build the smallest version that proves the idea on foundations that can grow.
Can you add subscriptions and payments?
Yes. We integrate Stripe, Paddle or Lemon Squeezy for subscriptions, trials, invoices, tax and customer billing portals, including failed-payment handling.
Who hosts the application?
It's deployed on Vercel, AWS or Azure under your own account, so you control the infrastructure and the bills.
Can the platform support enterprise customers?
Yes. Single sign-on, audit logs, role management and data export are common enterprise requirements, and we can design for them from the start.
Do you build the marketing website too?
Yes. A SaaS marketing site with pricing, documentation and a blog can share the product's design system and analytics.
How do you handle data privacy?
We separate customer data by workspace, encrypt data in transit and at rest, minimise what's collected and build deletion and export features so you can meet GDPR requests.
Can you work with our in-house developers?
Yes. We follow your repository, code review and conventions, and can own a defined part of the product.
What happens after launch?
Thirty days of free support, then optional ongoing development or maintenance. Most SaaS products continue with a regular development rhythm.
How do you decide what goes into version one?
We rank features by how directly they serve the core job users hire the product for, and by how much they'd cost to add later. Billing, permissions and data separation are hard to retrofit, so they come early; nice-to-have features can wait for real feedback.
Can the product have a public API?
Yes. We design versioned REST or GraphQL APIs with API keys, rate limits and documentation, so customers and partners can integrate with your product.
Related services
MVP Development
The smallest product that proves your idea.
Custom Software Development
Software built around your exact process.
Next.js Development
Server-rendered React sites and apps.
UI/UX Design
Research, wireframes, prototypes and interfaces.
DevOps & CI/CD
Automated pipelines, containers and infrastructure as code.
Dashboard Development
Live dashboards for operations, sales and finance.
Web Applications & SaaS by industry
Start building your platform.
Tell us what you need. You get an honest assessment, a clear plan and a written quote. The first consultation is always free.
- What happens next
- 1You tell us what you need
- 2We aim to reply within 24 hours with questions
- 3You get a written quote for your project