Web and app development

Developing a website or app enables us to optimise a specific action, experience or objective strategically. At SEIDOR, we transform these points of contact with customers into results through an optimised design and structure.

We determine the right design for each situation. We start by focusing on preliminary needs analysis, conceptualisation and information architecture before developing digital prototypes and multi-device adaptability to optimise the experience.


We develop digital solutions following the Scrum methodology, using the best tools for the needs of each project. Following the development stage, we perform quality assurance tests and provide training for users and content managers.


We support the infrastructure team for assembly and implementation, covering the development, pre-production and production environments.

System service
Servicio de sistemas
Análisis web

This includes tag management and appearance in search results through Google Tag Manager, Analytics and Search Console. We also analyse user behaviour with heat maps and measure user interactions with the Hotjar tool.

Web analytics services

We design and develop solutions, focusing on every aspect of the website to optimise your SEO. These elements include images, language redirects, sitemaps, OpenGraph, load performance, accessibility, optimisation for all types of devices, schema, robots.txt files to define interaction rules, 301 redirects and CDN.

SEO services
Servicios SEO

What we offer


We develop scalable and attractive online stores with the best features and latest technology. Manage orders, products, stock and customers from the back office and develop marketing and SEO actions.
If you have other platforms, such as ERPs or CRMs (customer relationship management), SEIDOR's expertise will provide maximum integration for a centralised and optimised store.

We create a ready-to-sell e-commerce solution for your company


You can create coupon campaigns and product promotions and benefit from the latest SEO techniques to position your website in Google.


Grow your business reach exponentially thanks to e-commerce. Benefit from a multi-language, multi-currency store and manage logistics worldwide.


We create solutions, focusing on the details of each of your e-commerce web pages. We develop advanced filters to help your customers find products quickly.

User experience

We design online stores with the user in mind, guaranteeing optimum usability and providing all payment methods.

APP: Progressive Web Apps

Progressive Web Apps are a solution based on traditional websites that incorporate features of native apps for smartphones and tablets.

What are the advantages of Progressive Web Apps?

The app does not need to be available in an app marketplace to download it. All you need is an internet connection and a web browser. In addition, users can install the app on the home screen of any device and use it at any time. It will be updated when an internet connection is available.

PWA features


The app will adapt to any format, browser and device.


The user will always see the latest version.


HTTPS protocol and TLS technology are used for web encryption.


Fast loading and optimised browsing.


Partial or full access without an internet connection.


They can run on multiple devices, operating systems and browsers.

Direct access

They can appear in search engine results.


Native appearance and own features.