Custom Software Development
✔️ Internal management
✔️ Planning
✔️ Follow-up
✔️ Automation
✔️ Portals
✔️ Extranets
✔️ dashboards
✔️ Dedicated tools
✔️ Adding features
✔️ Project analysis
✔️ Design
✔️ Development
✔️ Delivery and maintenance

User experience at the heart of your organization
The availability of applications impacts the productivity of your employees. Thinking about usage is also a way to contribute to the efficiency of your business.
Information sharing and collaborative tools are essential for improving the responsiveness of your employees and, therefore, the service provided.
Everything must work all the time, everywhere, and for everyone! Koesio supports you in developing, managing, and upgrading your IT systems.
Modern, fast, and scalable applications
Modern web applications
Modern architecture, responsive design, optimized performance, scalability.
Smooth and intuitive interfaces
Carefully designed UX/UI, intuitive navigation, accessibility, user testing.
Secure technologies
Proven technical stack, security by design, regular updates.
Reliable technologies
IT maintenance, supervision, and outsourcing
Design digital solutions that are perfectly tailored to your business needs.
Brands & technologies
Figures / Proof of expertise
+45%
error reduction with automated processes.


Maintenance in Conditions Operational
Maintenance in operational conditions covers all activities intended to ensure the functioning of an IT environment throughout its lifetime.
- >Supervision and analysis
- >Backup and Disaster Recovery Plan
- >Performance and capacity management
- >Preventive and proactive maintenance
FAQ – Custom Development
The custom development is relevant when: no software on the market meets your specific needs, you have a single business process to digitize, you want a competitive advantage (differentiating tool), or you need tocomplex integrations between systems. Before developing, we always check that an existing solution cannot be adapted.
Our technical stack includes: Python/Django and Node.js for the backend, React and Vue.js for the frontend, React Native and Flutter for mobile devices, PostgreSQL and MySQL for databases, and Even so for ERP developments. We choose the most tailored to each project, favoring solutions sustainable and maintainable.
Our agile methodology guarantees success.
Phase 1 : Scope and specifications (2-4 weeks).
Phase 2 Technical design and mock-ups (2-3 weeks).
Phase 3 : Iterative development with 2-week sprints and regular deliveries.
Phase 4 : Testing and acceptance (2-4 weeks).
Phase 5 : Production launch and training.
You validate at each stage and can adjust priorities.
Budget control requires: a precise framing upstream (avoid scope creep), a rigorous prioritization (MVP first, then upgrades), realistic estimates (with a margin of safety), a regular monitoring (weekly points), and the transparency on progress. We offer packages when the scope is well defined, or from supervised management for greater flexibility.
You are code owner developed for you. We deliver the full sources, the technical documentation, and the access to environments. You can upgrade the application internally or with another service provider if you wish. However, we recommend maintaining a maintenance relationship to ensure sustainability.
Develop the skills of your teams
Cybersecurity & User Best Practices
Collaborative tools & digital organization
ERP, CRM, DMS & automation
Cloud, infrastructure & telephony
GDPR Compliance & Data Security
🎓 Discover our Training Courses →
Train your teams on essential IT challenges.
Our latest content
Discover what's new in our company!
Switch to customization and truly optimize your business.
Let's turn your vision into reality. Contact us today to put your brand on the path to digital excellence.
Free IT audits · Certified cybersecurity · Secure cloud