SaaSdevelopment services for products that bill every month.

We build SaaS products that sign up customers, bill them correctly and keep their data apart, then keep improving them release after release. Product thinking, engineering and QA from one team.
Discuss your SaaS

Recurring revenue needs software that never stops working.

A SaaS product is judged every billing cycle. If onboarding confuses people, invoices go wrong or the app slows down when a big customer arrives, they cancel. Our SaaS application development services focus on the parts that keep accounts paying: tenancy, billing, onboarding, reliability and a codebase that can ship weekly.

Where SaaS products get stuck

01

Tenancy decided too late

The MVP stored everyone's data together with no clear boundaries. Enterprise prospects ask about isolation and nobody has a good answer.
02

Billing held together by hand

Plan changes, trials, proration and failed payments are handled manually or in fragile scripts.
03

Users sign up, then disappear

Onboarding asks too much too soon, and new accounts never reach the moment where the product clicks.
04

One big customer slows everyone

A single tenant with heavy data or traffic drags down performance for all the others.
05

Features pile up, releases slow down

Every customer request lands in the core product, and each release takes longer to test.
06

No view of what users actually do

Without product analytics, roadmap decisions rely on the loudest customer in the room.

Signs your SaaS needs a stronger engineering team

These usually show up right after the first paying customers, when the product has to grow up quickly.

1

Enterprise deals stall on technical questions

Prospects ask about roles, SSO, data separation or audit logs, and the product can't support them yet.

2

Churn rises after the trial

Accounts sign up but don't convert, and you can't tell where they drop off.

3

Finance fixes billing every month

Someone reconciles subscriptions, refunds and invoices by hand before every close.

4

The MVP is showing its age

Shortcuts that got you to launch now make every feature slower and riskier.

5

Infrastructure costs grow faster than revenue

Hosting bills climb with each new customer because the system wasn't built to share resources.

6

You raised a round and need to ship more

Investors expect a faster roadmap than the current team can deliver.

What we do

SaaS application development services, from MVP to scale

SaaS MVP development

A first version with the core workflow, sign-up and billing, built so it can grow instead of being thrown away.

Multi-tenant architecture

Tenant isolation, per-account configuration and data models that hold up as accounts multiply.

Subscription billing

Plans, trials, usage-based pricing, upgrades, invoices and dunning, connected to your payment provider.

Onboarding and activation

Sign-up flows, guided setup, invitations and in-app guidance that bring users to their first result faster.

Roles, permissions and SSO

Team accounts, granular roles and single sign-on that larger customers expect before they buy.

Admin and back-office tools

Internal panels for support, account management, feature flags and billing changes without engineers.

Analytics and reporting

Product analytics for your team and dashboards or exports for your customers.

Scaling and performance

Profiling, caching, background jobs and AWS infrastructure tuned for growth in users and data.

The building blocks of a SaaS that lasts

We plan these early, because adding them after launch is far more expensive.

Multi-tenant architecture

Tenancy model chosen for your market and data

Strict data separation between accounts

Per-tenant settings and feature flags

Room to move large customers to their own resources

Billing and subscriptions

Plans, trials, upgrades and downgrades

Usage tracking where pricing depends on it

Failed payment handling and reminders

Invoices and records finance can trust

Onboarding

Short path from sign-up to first value

Team invitations and role setup

Empty states and in-app hints that guide

Activation tracked so you can improve it

Scaling

Background jobs and queues for heavy work

Caching and query tuning as data grows

Monitoring and alerts on key flows

Infrastructure costs watched per account

Who is this for

For teams building a subscription business

SaaS startups

You're going from idea or MVP to paying customers and need the product to keep up with sales.

Product companies

You're turning an on-premise or service-based offer into a subscription product.

SMBs with an internal tool

A tool you built for yourselves could serve other companies, once it supports multiple tenants and billing.

Founders after a round

Funding is in place and the roadmap needs a team that can deliver it without a long hiring process.

Where are you now?

Idea stage

Scope the first version and its pricing model.

MVP in progress

Finish it with tenancy and billing done right.

First paying customers

Fix onboarding and the most painful gaps.

Moving upmarket

Add roles, SSO and audit trails.

Growing fast

Scale infrastructure and the team.

Rebuilding

Replace a fragile MVP step by step.

How we build and grow your SaaS

01

Product discovery

We clarify your customers, pricing model and core workflow, and decide what the first release must include.

02

Architecture

Tenancy model, data design, billing approach and infrastructure, written down and agreed before building.

03

First release

Core workflow, sign-up, onboarding and billing, shipped in sprints with a demo at each step.

04

Launch and measure

Production setup, monitoring and product analytics, so you see how real accounts use the product.

05

Iterate and scale

Regular releases driven by data and customer feedback, plus performance work as accounts grow.

How we work

Choose how to start

SaaS Discovery Sprint

A 2-week fixed-price Discovery Sprint

Fixed price. Development quoted after it.

For new SaaS products or a rebuild, when scope, tenancy and pricing logic still need decisions.

Core workflow and user roles mapped

Tenancy and billing approach

Prototype of key screens

Release plan for the first version

Estimate for the build

Start with discovery

Dedicated SaaS team

most popular

Engineers, QA, design and a PM on your product

Monthly, team-based. Scale up or down.

For live SaaS products that need a steady release rhythm and someone who owns delivery.

Team that learns your product and customers

Roadmap planned with you every sprint

QA on every release

Performance and cost monitoring

Team grows with your customer base

Discuss your team

SaaS products we've worked on

Data MANAGEMENT & payroll

AI Payroll Platform (NDA)

Europe

An AI-powered payroll validation platform that extracts data from salary slips, verifies payroll calculations, and automates reporting and approval workflows for HR and finance teams

Before
→
after
↓
Manual payroll validation
↑
17% fewer salary calculation errors
↓
Complex PDF extraction
↑
AI-powered PDF data extraction
↓
Manual approval workflows
↑
Automated payroll validation and reporting workflows
↓
 Limited processing scalability
↑
Scalable platform for payroll processing
SaaS

Magmaset: one tool for all project tasks

Read the case study →

Make the most of the experienced team

We are a global team of
creative
and
strategic thinkers
who specialize in building custom digital products
from scratch. Our main goal is to
deliver high-quality solutions
that meet our clients' needs.
We are a global team of
creative
and
strategic thinkers
who specialize
in building custom digital products
from scratch. Our main goal is to
deliver high-quality solutions
that
meet our clients' needs.
Learn more
85%
recurring customers
12M
the biggest fundraising round by one startup
X3 MRR
growth of partner's business in 5 mos
2 weeks
for project start
5+ years
av. partnership duration with SMBs and product companies

Why Gilzor

Subscription products need a partner for the long run. Our clients usually stay with us well beyond the first release.

What we bring

Founder track record

The biggest fundraising round by one startup we worked with was $12M.

Growth experience

A partner's business grew MRR 3x in 5 months.

Returning clients

85% of our customers come back with new work.

Launches behind us

70+ products launched.

Full product team

Business analysis, UX/UI, engineering, QA and project management.

What makes us different

Product-minded engineers

We ask how a feature affects activation, churn or revenue before building it.

Built to change

Architecture that supports new plans and features without a rewrite.

You own the product

Code, infrastructure and data stay in your accounts.

Honest scoping

We tell you what to leave out of the first version.

Overlap with US hours

Engineers in Europe share part of your working day for calls and reviews.

What our clients
frequently ask

What does multi-tenant architecture mean for my product?

It means many customer accounts run on the same application while their data and settings stay separate. We choose the tenancy model (shared database, separate schemas or separate databases) based on your customers, data sensitivity and cost targets.

Can you add billing to a SaaS that already exists?

Yes. We connect your product to a payment provider, model plans and trials, and move existing customers over carefully so nobody is charged twice or not at all.

Do you only build new SaaS products?

No. We also take over live products, fix onboarding, billing or performance problems and keep shipping the roadmap. We start by reviewing the code and infrastructure.

How is SaaS development priced?

A Discovery Sprint is fixed price. After it, you choose a fixed-price build for the first release or a dedicated team billed monthly.

Which stack do you use for SaaS?

Usually React or Next.js with TypeScript on the front end, Node.js or Python on the back end, PostgreSQL for data and AWS for infrastructure. We adapt to an existing stack when there is one.

Can you help us sell to larger customers?

We build the features they tend to ask for, such as roles and permissions, SSO, audit logs and data export. We don't make compliance claims on your behalf, but we build so your compliance work is easier.

No sales pitch

Tell us about your SaaS product

Where is it today, who pays for it and what's in the way? We'll suggest a starting point and come back with a rough estimate.

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