Custom Business Application Development in the Basque Country

A digitalisation partner, based in Biarritz

There is a difference between a supplier who delivers a project and a partner who gets involved in your business. At Groupe Milestone, we work within long-term contracts: we learn your business, your constraints and your objectives before writing a single line of code.

Our roots in the Basque Country are not a marketing claim — they are an operational reality. We can easily work on site, in Bayonne, Anglet, Biarritz, Pau or across the wider Sud-Landes/Béarn area. Proximity makes communication easier, speeds up decisions, and builds the trust that makes a long-term project possible.

We also donate a share of the profit from every project to a local association — because being committed to a region also means contributing to it.

Our custom solutions for local businesses and authorities

Business applications and software designed for your activity

Off-the-shelf software covers 80% of the needs of a generic market. If your business process falls within the remaining 20% — an unusual stock management setup, an approval workflow specific to your sector, an interface tailored to your field teams — a custom tool is not a luxury, it is the only coherent answer.

We design custom business applications and custom business software that match your organisation exactly: your data, your business rules, your internal vocabulary. The tool belongs to your company, its code is delivered to you, and it evolves with you.

AI to enhance your processes

Artificial intelligence transforms what business software can do — provided it is integrated in a targeted way, not bolted on as a marketing option.

We integrate AI directly into the applications we build: automatic extraction and classification of documents, decision support based on business data, anomaly detection, automation of high-volume repetitive tasks. The result is a tool that does more, with less human effort spent on low-value tasks.

Find out more about our approach: AI-driven automation of your processes.

From software to connected hardware (IoT): end-to-end support

Some business processes do not stop at the screen: they involve physical equipment, sensors, production lines or devices deployed in the field. We also design the connected hardware components (IoT) that interface with your applications — 360° support, from software to the field, with no break in accountability between multiple suppliers.

Why choose a local partner for your custom project

Most "digital" agencies in the Basque Country specialise in websites, communications or e-commerce. We do something different: custom business software and applications, for companies and local authorities whose internal processes don't fit into a packaged solution.

This positioning comes with concrete commitments:

• In-depth technical expertise. Our developers go deep into the technologies they master — from embedded development to cloud architectures — rather than skimming the surface of everything. Rigour on every line of code, amplified by AI.
• Transparent communication. You always know where the project stands, what has been decided and why. No black box.
• A lasting relationship. Business software lives, evolves, and needs maintaining. We are there after delivery, through structured long-term support.
• A complete technical vision. Scalable cloud architecture, UX suited to field use, data security: we address these dimensions from the design stage onwards.

Our approach, step by step

A successful project doesn't start with development. It starts with understanding.

1. Audit and scoping. We analyse your existing business processes, identify friction points and define precisely what the tool needs to solve.
2. Functional and UX design. We map out the features, user journeys and interfaces before writing code. This phase avoids costly rework during development.
3. Iterative development. We work in short iterations, with regular check-ins. You watch the product take shape, give feedback, and we adjust.
4. Delivery and deployment. Supported go-live, user training, documentation.
5. Long-term follow-up. Maintenance, enhancements, version upgrades, integration of new components — we remain partners, not just suppliers.