Interface & user journeys
Build the screens around users’ real tasks and the rules of your business.
Our service
Custom Web Development: Business Applications and SaaS Built to Last
Custom web development lets you build an application aligned with your processes and integrated with your information system. Business applications, SaaS, extranets and portals: Etixio connects user experience, front end, APIs and data, adds the AI features that are useful and maintains the application after go-live.
For
Companies and software vendors whose business rules or integrations go beyond a CMS or standard tool
What you get
Business app, SaaS, extranet or portal integrated with your systems, tested, deployed and documented
Technologies
React, Angular, Vue.js, Node.js, Symfony, Laravel; Docker, CI/CD, AWS or private cloud
Format
Fixed-price project for a defined scope, dedicated team for a SaaS that evolves continuously
What we build
A scope tied to your business.
A web application lets users carry out operations from their browser: manage files, collaborate, subscribe to or administer a service. It requires connecting the interface, the business rules and the data. We design these parts together, rather than treating the screens as a website independent of the system.
Back end & data
Develop the services, access rights and integrations with other applications.
Production & evolution
Organize testing, deployment, service monitoring and maintenance.
For which needs
When should you choose custom web development?
Custom development becomes relevant as soon as off-the-shelf solutions no longer cover your business rules, your integrations or your growth. For a simple editorial website, a CMS is often enough; our article custom web development or CMS helps you decide.
Launch a scalable SaaS
From MVP to a multi-client platform, with account management, permissions, billing and roadmap evolution.
Build an internal business application
A specific CRM, back office, approval workflow or operational tool that applies your rules and eliminates duplicate data entry.
Open a customer or partner extranet
Secure access to documents, orders, metrics and tracking, connected to your internal data.
Modernize an existing application
Take over an aging tool, preserve how it is used and make it more reliable, faster and easier to evolve.
Connect your tools and centralize your data
API integrations with your ERP, your CRM or your partners, dashboards and e-commerce platforms tailored to your rules.
Concrete web applications
Examples of custom web applications.
Internal workflow
Approvals, task management and operations tracking brought together in a centralized web application.
Customer extranet
Documents, orders and metrics accessible to your customers, with permissions per account.
Decision-making dashboard
Data from your business tools consolidated to steer the business. See our BI and data service.
Multi-tenant SaaS platform
Several clients on the same application, with data isolation, access management, billing and configuration.
E-commerce and PIM
Catalog, inventory and specific sales rules, beyond what an off-the-shelf solution allows.
From work to deliverables
How the engagement unfolds.
We define the user journeys, the roles and the exchanges with the APIs. The front end handles interactions and feedback; the back end validates operations and their access to data. Tests cover the important user journeys, errors and integrations. Go-live preparation covers deployment, logs and maintenance.
What your team receives
- Interfaces and services
- Tested integrations
- A deployable, documented application
Product scoping
Objectives, metrics and functional scope, priorities and an architecture suited to your business constraints and your information system.
UX/UI design
User journeys validated on a prototype to limit corrections during development.
Iterative development
Front end, back end, APIs and databases, in short sprints with regular demos.
Quality and security
Automated tests, code reviews, access management, data protection and OWASP best practices.
Deployment and maintenance
Production release, monitoring, performance and new features over time.
The choices that matter
The points to decide with your team.
Rendering, caching and authentication depend on the type of pages and the information displayed. A public portal and a customer area do not share all the same constraints. We assess performance, accessibility and mobile behavior based on the product’s actual usage.
Our web stack
Which technologies for custom web development?
The choice depends on the type of application (SaaS, business tool, platform), functional complexity, data volume, security and performance requirements, and integration with your information system.
Languages
JavaScript and TypeScript, Python and PHP.
Frameworks
React, Angular and Vue.js for interfaces; Node.js, Symfony and Laravel for services and APIs.
DevOps
Docker, GitHub and GitLab, continuous integration and deployment.
Cloud, data and performance
AWS or dedicated private cloud, dashboards, process automation, optimization of response times and scalability.
Web applications and AI
AI features built into your web application.
An assistant in the customer area, natural-language search across your documents, automatic extraction of information from an uploaded file, a summary of a case file: these features are integrated into the application’s screens and APIs, with the user’s permissions, logs and usage tracking. We also take over AI prototypes to make them usable. See our AI solutions for businesses.
The collaboration framework
Preparing the first conversation.
You can present how things currently work, the users involved and the difficulties you face. The documents, examples and access required are specified afterwards, depending on the chosen scope. The first objective is to understand the work to be done and the dependencies that may affect how it unfolds.
An application with a defined scope can be delivered as a fixed-price project. For a SaaS that evolves continuously, a dedicated team — developers, QA and a tech lead, in Madagascar and Mauritius — ensures continuity.
Frequently asked questions
Custom web development: your questions.
How much does custom web development cost?
It depends on the functional scope, technical complexity, integrations with your information system and performance and security requirements. The gap is significant between an MVP and a complete application; a project estimate based on a scope and assumptions lets you price it.
How long does it take to develop a custom web application?
An MVP can be developed in a few weeks. A complete project generally spans several months, with incremental deliveries that let you use the priority features early.
When should you choose custom development over a CMS?
When business needs are specific, complex integrations are required or off-the-shelf solutions do not offer the expected performance or scalability. For a mainly editorial website, a CMS is often still the right choice.
Can you take over an existing web application?
Yes. The application is first audited, then fixed, improved or rebuilt depending on its condition, its technical quality and your objectives. We favor a gradual takeover that preserves current usage.
How is security ensured?
It is built in from the design stage — access management, data protection, OWASP best practices — then verified through code reviews and regular testing to limit vulnerabilities.
Can you start a project without an in-house technical team?
Yes. We handle the project from scoping through go-live and maintenance, with an identified technical point of contact. You stay in control of business priorities and acceptance testing.
Can you add AI features to a web application?
Yes, to an existing application as well as a new project. Assistant, document search, extraction or summarization are developed as services of the application, tested and monitored in production.
What benefits can you expect from a custom web application?
Fewer manual tasks and data re-entry errors, centralized data, interfaces suited to how people work and an application that evolves with your business. The gains are measured on the processes concerned, to be defined during scoping.
Let’s talk about your project.
Tell us what you want to build, the users involved and your technical environment. Together we will define the first scope to study.