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Web apps and SaaS
Web apps and SaaS platforms, built in phases
We design and build web apps, customer portals and SaaS platforms. Most start with a first version that covers the core workflow, then grow in phases, priced per phase or by the hour.
- In phases
- a first version, then the next features
- Weekly demos
- progress you can try on a test link
- You own it
- code, cloud accounts and documentation
When does a business need a custom web app?
When off-the-shelf tools no longer fit how you work, or when your idea is the product itself.
Work runs on spreadsheets
Orders, jobs or approvals live in Excel files and email threads.
Tools don't talk to each other
People copy data between systems by hand.
Customers need a portal
Clients want to order, track or download documents themselves.
You have a product idea
A SaaS product or marketplace that customers will pay for.
Ready-made software is too rigid
You pay for features you don't use and miss the ones you need.
No live view of the business
Managers wait for reports instead of seeing the numbers as they happen.
What is included in a web app project?
A product your team and customers use every day, designed, built and tested by one senior team.
- 01
Product discovery
Users, workflows and priorities mapped, so the first version covers what matters most.
- 02
UX and UI design
Screens designed and clicked through with you before development.
- 03
First version
The core workflow built first, so real users can start early.
- 04
Backend and APIs
React front ends with Node.js, .NET or Python backends, and APIs for other systems.
- 05
Integrations
Payments, accounting, ERP, maps or email, connected where you need them.
- 06
Cloud and DevOps
Hosting on AWS or Azure, automated deployments, monitoring and backups.
- 07
QA and testing
Manual and automated tests on every release.
- 08
Support and next phases
Monthly support or hourly work, and new features in planned phases.
Example platform
IDX: an anti-counterfeit platform with unique product codes
We built the backend on .NET and Azure, a code engine that gives every product its own signed code, a verification page for buyers, a brand dashboard and an API. The platform was delivered and handed over to IDX.
- 1 code
- per item, digitally signed
- No app
- buyers check with the phone camera
- 3 parts
- dashboard, verification page and API
How does a web app project run?
In phases, each with a working result you can test.
- 1
Discovery
Users, workflows and priorities agreed, and the first version scoped.
You: share how the work runs today
- 2
Design
Clickable screens for the main workflows.
You: approve the screens
- 3
First version
The core workflow built, with a demo every week.
You: test it on real work
- 4
Launch
Live for your first users, with support while they start.
You: invite your users
- 5
Next phases
New features planned and built in order of value.
You: pick the next priorities
How much does a web app cost?
It depends on the scope, so every project starts with a written scope and price. Defined phases are a fixed price, open-ended work is billed by the hour, and long-term products can run as a dedicated team.
What the price depends on
- The number of user roles and workflows
- Integrations with other systems
- Data to move over from old tools
- Web only, or web plus mobile apps
- Security and compliance requirements
How can we work together?
Pick the model that fits the project. You can switch later.
Fixed price per phase
For a clearly scoped first version or phase. One price, agreed before we start.
Hourly
For ongoing development and improvements, with an estimate before each task.
Dedicated team
For long-term products: a team that works only on yours, billed monthly.
Platforms we built
All case studies
Sentysoft took CanterLope from idea to product: an owner admin panel, a web app for barn owners, a React Native app for iOS and Android and a WordPress ...
Sentysoft built a logistics operations platform from scratch: a React admin panel for the platform owner and customer companies, a React Native driver app ...
Web app questions
Yes. Most projects start with a first version that covers the core workflow. You launch it to real users, then add features in phases, based on what they use.
React for the front end, and Node.js, .NET or Python for the backend, on AWS or Azure. We choose what fits your team and your plans.
You do. The code, the cloud accounts and the documentation are in your name.
Yes. We start with a code review and tell you what to keep, fix or rebuild.
Yes. We build iOS and Android apps alongside the web app, sharing one backend.
We support the app monthly or by the hour, fix issues and build the next features.
