We design and build internal systems and subscription-based SaaS products that run in the browser, sit behind secure sign-in and show content according to role and permission. We shape them around how your business actually works, and we hand the source code over to you.
Prepared by Pan Innovation House, a software company based in Gaziantep, Türkiye · Last reviewed:
A web application is software that runs in a browser and includes user sign-in, role and permission management, a database and business logic. Unlike a promotional corporate website, it is a system people work in every day: an order panel, a dealer portal, a production tracking screen or a customer self-service area. SaaS (software as a service) is the same application offered to many companies on a subscription model, with each company's data kept separate.
Off-the-shelf panels and template plugins get you started quickly, but they hit their limits as soon as your workflow steps outside standard patterns. Custom role hierarchies, company-specific approval flows, integration with your existing ERP or accounting software, or automatic generation of export documents are needs that ready-made products rarely cover. With custom development, the application is built to fit your processes, carries no unnecessary features and stands on a scalable foundation.
At Pan Innovation House we build web applications on an API-first architecture with a modern, maintainable stack. In a multi-tenant setup every customer's data is isolated; the role and permission layer, audit logging and security are part of the design from day one. We develop iteratively, showing a working version at the end of every sprint; after go-live, the maintenance scope and response times are defined in the contract. The source code we write and your data are handed over to you as defined in the contract; third-party and open-source components remain subject to their own licences.
A web portal for carpet, machinery, textile and food manufacturers where dealers place orders and see their account balance and shipment status. It moves order traffic away from phone calls and WhatsApp into a single panel and reduces errors.
Multi-tenant SaaS infrastructure for teams that want to turn a subscription software idea for a specific sector into a product: end-to-end setup including registration, plans and subscriptions, billing integration and usage-based permissions.
A single internal web system for businesses whose processes are split across Excel files, email chains and separate tools. An operations panel that brings production, shipping, quality or HR flows onto one screen, governed by roles and permissions.
A central, multilingual web application for exporters and multi-branch companies working across different locations, countries and currencies. Permission separation between branches, consolidated reporting and integration with existing systems bring distributed teams together in one panel.
A multi-tenant architecture where every customer's data is logically separated on a shared codebase. With tenant-level configuration, domain mapping and data isolation, we lay a SaaS foundation that is ready to grow.
Screen and action permissions by role: admin, manager, operator, dealer and more. Approval flows for sensitive actions and an audit log that answers who did what and when make for a secure permission model.
Dashboards that drive decisions: summary cards, filterable tables, charts and export. They condense data into the one screen managers use daily and reduce the need for a separate reporting tool.
WebSocket-based live updates so order, stock or status changes appear on screen without a page refresh. In-app notifications, email and instant alerts where needed keep teams informed on time.
Self-service areas where customers and dealers place their own orders, access documents, open requests and track their account balance. They lift repetitive load off the operations team and speed up the customer experience.
A structure where the API is designed first and the web interface runs on that API. It integrates with your existing ERP, CRM, accounting software, your e-invoice integrator and payment providers (iyzico, PayTR), and makes adding a mobile app later much easier.
Plan definitions, subscription status, trial periods and usage-based limits for SaaS products. Payment provider integration and an invoicing flow keep the recurring revenue model technically sustainable.
Not every workflow needs a custom web application. The tables below set out four common routes, what the project covers and what it does not, what you receive at handover, and what drives time and cost.
The choice mostly depends on the number of users and roles, how specific your business rules are, data exchange with other systems, and whether the application may one day be sold to other companies.
| Route | Enough when | Where it struggles | Cost structure |
|---|---|---|---|
| Shared spreadsheets and form tools | Few users, simple records and lists; no need for permission levels or an activity log. | As users grow, permission, versioning and data-integrity problems grow too; nobody can see who changed what, and business rules scatter across formulas. | Low subscription; the hidden cost is errors and manual corrections. |
| Off-the-shelf SaaS product | Your need falls into a common category (for example project tracking, bookings, support tickets) and your process can adapt to the product. | Business-specific approval, pricing or production rules and a deep ERP link may hit the product's limits; where your data is kept and the product roadmap depend on the provider. | Subscription per user. |
| Low-code platform | Internal panels and simple workflows; you want a working version quickly. | Limits can appear with complex logic, many users or performance needs; the app lives on the platform and is hard to move elsewhere. | Subscription per user or per use. |
| A custom web application | Your business rules are specific to you, there are several roles and system integrations, or you plan to offer the application to other companies as SaaS. | Discovery, architecture and testing take time; the initial investment is higher than a ready-made product. The product needs an owner. | A project fee and a maintenance agreement; hosting costs are separate. |
Scope is written down for every project during discovery. The split below shows the boundaries that most often get blurred in web application projects.
| Area | In the project | Out of scope or agreed separately |
|---|---|---|
| Application | Screens, roles and permissions, business rules, an audit log and an admin panel. | Decisions to change your processes and how work is divided are yours; in discovery we map today's flow together. |
| Hosting and third-party services | Setting up deployment, monitoring and backups. | Cloud or server hosting fees and subscriptions for services such as email delivery, SMS and maps are separate items. |
| SaaS commercial layer | Multi-tenant structure, plan and subscription management, payment provider connection. | The payment provider agreement, user terms and a legal assessment under Turkish data protection law (KVKK) or GDPR are out of scope. |
| Existing data | Importing data from spreadsheets and older systems. | The accuracy of imported data rests with its source; clean-up is planned together. |
Handover covers the working application and the pieces that let you keep changing it safely.
| Deliverable | What it is for |
|---|---|
| A working application and admin panel | The system where users do their work according to their roles. |
| Automated tests and a release pipeline (CI/CD) | Lets later changes go live in a controlled way. |
| Monitoring and backups | Errors and outages are spotted early; data can be restored. |
| Source code | The source code we write and your data are handed over to you as defined in the contract; third-party and open-source components remain subject to their own licences. |
A firm figure is given in writing after discovery. These factors set the quote most.
| Factor | Why it matters |
|---|---|
| Number of screens and roles | Every role means its own permission rules and test scenarios. |
| Integrations | The number and direction of ERP, accounting, payment and e-document links change the workload. |
| Multi-tenancy | Serving several companies adds data separation and subscription management. |
| Security and logging requirements | Audit logs, two-factor authentication and data-retention rules are extra work. |
| Data to import | The number of records and how clean they are set the import effort. |
If these are ready, the first call is concrete; we can fill any gaps together during discovery. The first 30-minute call is free; the scope of an on-site discovery, and its fee if any, is agreed in writing during that call.
Together we map your current workflow, user roles and the systems to integrate with. We pin down the scope, screen list and priorities to form a realistic roadmap; cost and timeline become concrete after this stage.
We design the data model, the multi-tenancy approach, the role and permission scheme and the API contract. We prepare clickable mock-ups of the critical screens, and once the direction is right we move into development.
We split the work into sprints and show a working version at the end of each one. Core flows go live first; feedback drives early corrections and there are no surprise deliveries.
We verify with automated tests, security and permission checks and real-world scenarios. Every delivery goes through a review step before it goes live.
We deploy with CI/CD, set up monitoring and backups and hand the source code over to you. From then on, maintenance, updates and new feature development continue; the maintenance scope and response times are defined in the contract.
Cost and timeline depend on the number of screens, the complexity of roles and permissions, integration requirements and whether multi-tenancy is needed. Rather than inventing a figure up front, we clarify the scope after discovery and present a concrete proposal and schedule. If you prefer, we can start with a core version and grow it in stages.
Yes. The source code we write and your data are handed over to you as defined in the contract; third-party and open-source components remain subject to their own licences. The code repository, documentation and deployment details are handed over too, so you can continue with another team whenever you wish.
It will. Thanks to the API-first architecture, we integrate the application with your existing ERP, CRM, accounting software, your e-invoice integrator and payment providers such as iyzico and PayTR. We define the integration scope during discovery, based on the APIs and file formats each system offers.
A website mainly presents promotional content; visitors read and move on. A web application requires sign-in, works by role and permission, and is used for real work every day: an order panel, a dealer portal, an internal operations screen. This page covers the latter — applications that do work.
Yes. In a multi-tenant architecture every customer's data is isolated while running on a shared codebase; subscriptions, plans and usage management are part of the design from the start. This is our standard approach for start-ups and companies building their own SaaS product.
We do. After go-live we provide monitoring, bug fixing, security updates and new feature development; the maintenance scope and response times are defined in the contract. We shape the maintenance scope together, around your needs.
SaaS (software as a service) is software delivered over the internet on a subscription, without being installed on the user's computer. The same application serves many companies, and each company's data is kept separate from the others. For teams that want to build their own SaaS product, we develop multi-tenant architecture, plan and subscription management, trial periods, usage limits and payment provider integration into the design from the very start.
We listen to what you need and tell you whether custom development or an off-the-shelf product fits better. The first 30-minute call is free; the scope of an on-site discovery, and its fee if any, is agreed in writing during that call.
Pan Innovation House is a Gaziantep-based software company that builds ERP-connected iOS and Android apps for warehouse, quality and maintenance teams in the factory and for sales and service teams in the field. We design iOS and Android applications around your needs, build them with offline mode and push notification infrastructure, and manage the App Store and Google Play release process; approval decisions rest with the stores.
Details →Desktop applications that keep going even when the internet drops, connect directly to barcodes and local hardware, and run fast on the shop floor and in the office. For Windows and macOS, with the source code we write handed over to you.
Details →Web applications that are installable, work offline and meet the Core Web Vitals thresholds. Measured speed, a solid technical SEO foundation and an experience developed specifically for your brand.
Details →Custom API and integration development that gets your ERP, CRM, marketplace, e-invoice and production systems talking to each other, with a two-way, secure and traceable data flow.
Details →We set up electronic data interchange with retail chains and major buyers alongside your ERP. We turn incoming orders into your records, your shipments into dispatch advices and your invoices into the message the buyer expects; a faulty message lands in a queue, gets corrected and is sent again.
Details →We build the cloud infrastructure that keeps your software stable, secure and scalable: an automated, observable and reversible flow from code change to production release.
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