Custom Web Applications

A custom web application is a system built around a specific process in your company: handling orders, working with customers, reporting or sales. It runs in the browser, so users do not need to install anything, and the team ships changes in one place. At Odysse we run these projects from the first conversation about goals to maintaining the live system.

01When a web application, and when an off-the-shelf tool

Not every problem needs custom software. If the process is standard and an off-the-shelf SaaS tool covers it fully, using that tool is usually cheaper and faster. A custom application makes sense when:

• the process is a source of competitive advantage and does not fit the template of a ready-made tool,
• data is spread across several systems and needs to come together in one place,
• the cost of licences and workarounds in existing tools grows with the team,
• the application is a product the company sells to its own customers.

Typical web applications we build are customer portals, order management systems, internal tools for teams, platforms that connect many users and APIs that expose data to other systems.

During analysis we say openly if we think a ready-made solution, or integrating it with what the company already uses, is the better choice. Sometimes the best project is a small module that connects existing tools, not a new system built from scratch.

02What a project looks like

We work in seven stages: discovery, strategy, design, development, testing, deployment and scaling. Every handover is documented and versioned, so at any moment it is clear what is done and what comes next.

A project starts with a conversation about business goals, users and constraints. If the application already exists, we run a technical audit. This gives us the scope of the first release and the direction of the architecture. Then we design the interface and flows, and we test prototypes before writing production code.

Development is iterative and happens in a working environment. Instead of waiting months for one big delivery, you see new working features and can review them as they arrive. A change of priorities during the project does not mean throwing work away.

On the company side we need a person who knows the process and makes product decisions. With them we set priorities, show progress after every iteration and decide together what goes into the next release.

Before launch, the application goes through automated tests, load tests and a security review. Deployment runs through CI/CD pipelines, with monitoring and a controlled rollout of the new version.

03Technology and architecture

We choose technology to fit the problem, not the other way round. Most often we work with this stack:

• Frontend: React and Next.js with TypeScript. Next.js combines server-side rendering with static pages, which helps with speed and search visibility.
• Backend: Node.js or Laravel, depending on the project and the team that will develop it further.
• Data: PostgreSQL or MySQL, with a data model designed around the queries the application actually runs.
• API: REST or GraphQL. We choose based on how the application uses data, not on trends.
• Interface: Tailwind CSS and a component system that keeps new views consistent.

Examples from our portfolio: Data Flower is a bug reporting and tracking tool built with React, TypeScript and Node.js. 4rom is a social platform built on Laravel and Livewire. 3D Parser API is an API for integrating 3D models into other applications.

We design the architecture so the application can grow: modules with clear boundaries, a documented and versioned API, environment configuration kept in the repository. The next team or the next project stage does not have to start by guessing how the system works.

Security is part of the architecture, not an add-on at the end. We design authentication and permissions from the start, and we build integrations with external systems so that a failure on one provider's side does not stop the whole application, with retries and error logging.

04Maintenance after launch

Launch is the beginning of an application's life, not the end of the project. After go-live we handle dependency updates, security patches, monitoring and performance. We track how users work with the application and plan the next features based on that. Code, configuration and documentation are versioned in the repository, so every change is visible and reversible.

It is worth including maintenance in the budget from the start. We cover what is most often overlooked in our article on the cost of building a web application. If you already have an application built by someone else, we can take over its development: we start with an audit of the code and infrastructure, and then agree on a plan of changes.

Want to find out whether a custom web application is the right direction for your company? Describe the process you want to improve, and we will suggest where to start.