Custom web application development in Besançon and Franche-Comté
FNB Solutions is a software engineering studio based in Besançon, France. We design, build and maintain custom web applications, internal tools, backend systems and high-end websites for companies in Besançon, the Doubs and the wider Bourgogne-Franche-Comté region, as well as for clients across France and abroad.
Working with a studio in Besançon means you can meet the engineers who build your product, in your offices or ours, and sign a contract under French law with a team that answers in French or English.
Where we work
The studio is registered at 32 C rue Gabriel Plançon in Besançon. We meet clients in person in Besançon and travel across Franche-Comté for workshops, kick-offs and reviews; the rest of the work happens remotely, with regular demos you can open from anywhere.
We also work with companies in Dijon and in the Swiss Jura arc (Neuchâtel, Lausanne), about one and a half to two hours away.
Areas we visit in person
- Besançon
- Doubs
- Jura
- Haute-Saône
- Territoire de Belfort
- Montbéliard
- Dijon
- Neuchâtel and Lausanne
FNB Solutions · 32 C rue Gabriel Plançon, 25000 Besançon
+33 6 42 45 95 16 · info@fnb-solutions.com
What we build for companies in the region
The same services we offer everywhere, with the option of working face to face:
- Custom Web Application Development
Complete products from concept to production: platforms, customer-facing applications and backend-heavy systems built for durability.
- Software Architecture & System Design
Robust, scalable systems with clear structure, well-defined data models and coherent APIs that stay maintainable as the product grows.
- Internal Tools & Operations Systems
Turn manual processes into reliable systems. Streamline workflows and keep your data structured, accessible and consistent.
- Software Rescue & System Recovery
Fix systems that feel messy, slow or fragile. Clean up architecture, resolve data issues and stabilize rushed or poorly built products.
- Technical Audit & Code Review
An independent review of architecture, code, security and infrastructure, with prioritized findings and a clear plan.
- Web Security & Incident Response
Investigation and remediation of compromised applications and websites, then hardening so the same attack doesn't work twice.
- High-End Custom Websites
Highly visual, custom websites and content platforms that stay fast, accessible and easy to extend.
- Long-Term Technical Partnership
We build the system, then stay and run it with you: ongoing development, scaling and full technical ownership.
Who we typically help
Industrial and precision manufacturers
Franche-Comté's economy is built on precision industry, microtechnology and automotive supply. These companies often run on spreadsheets and ageing in-house tools; we replace them with internal applications that fit how the workshop and the office actually work.
Growing service companies and startups
Teams that need a customer-facing platform, a client portal or a product built properly the first time, without hiring a full engineering department.
Businesses with a fragile or compromised system
Companies whose application was built by someone no longer available, or whose website has been hacked, and who need it stabilized, cleaned up and documented.
Why work with a studio in Besançon
Face-to-face when it matters
Workshops, kick-offs and acceptance reviews in person, without the cost of flying a Paris agency in.
French contracts, EU data
Contracts under French law, invoicing in euros, GDPR data processing agreements and EU hosting options.
A senior team that stays
Senior engineers who are partners in the studio, the same people from start to finish, with no subcontracting.
You own everything
The code and IP are yours from day one, and repositories and hosting stay in your accounts.
Typical budgets
Indicative ranges, excluding VAT. A paid discovery phase turns them into a firm estimate for your project.
- Custom Web Application Development
- 3–9 months to a first production release
- €30,000–€120,000 excl. VAT
- Web Security & Incident Response
- Response within 24 hours; containment in 1–3 days
- €2,500–€10,000 excl. VAT per incident
Frequently asked questions
- Do you only work with companies in Besançon?
- No. The studio is based in Besançon and meets local clients in person, but most of our work is for clients elsewhere in France and abroad, run remotely with regular demos.
- Can you come to our offices?
- Yes, across Besançon and Franche-Comté, and in Dijon or the Swiss Jura arc by arrangement. Kick-offs and key reviews in person are usually worth it.
- How much does a custom web application cost?
- Most custom applications we build cost between €30,000 and €120,000 excluding VAT, depending on scope, integrations and compliance. A technical audit costs €5,000 to €15,000. Our cost guide explains what drives the price.
- Do you build websites as well as applications?
- Yes. We build high-end custom websites and content platforms, but our focus is on products where the logic and the data matter, not template sites.
Based in Franche-Comté?
Tell us what you're building or what's going wrong. We're happy to meet in person in Besançon or at your offices.