Services for building, fixing and running complex web applications
FNB Solutions is a France-based engineering studio. We design, build and support complex digital products, from backend-heavy platforms and internal tools to highly visual custom websites, with one accountable team across the whole stack.
Our services
Custom Web Application Development
Complete products from concept to production: platforms, customer-facing applications and backend-heavy systems built for durability.
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Software Architecture & System Design
Robust, scalable systems with clear structure, well-defined data models and coherent APIs that stay maintainable as the product grows.
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Internal Tools & Operations Systems
Turn manual processes into reliable systems. Streamline workflows and keep your data structured, accessible and consistent.
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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.
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Technical Audit & Code Review
An independent review of architecture, code, security and infrastructure, with prioritized findings and a clear plan.
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Web Security & Incident Response
Investigation and remediation of compromised applications and websites, then hardening so the same attack doesn't work twice.
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High-End Custom Websites
Highly visual, custom websites and content platforms that stay fast, accessible and easy to extend.
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Long-Term Technical Partnership
We build the system, then stay and run it with you: ongoing development, scaling and full technical ownership.
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How we work
Every engagement follows the same discipline, whether it is a new build, a rescue or an audit.
- 01
Understanding the problem properly
Before writing code, we focus on clarity. We take the time to understand the product goals, technical constraints, and risk areas — so we’re solving the right problems, not just the visible ones.
- 02
Designing the right foundation
We define architecture, system boundaries, and key technical decisions early. This creates a stable foundation that supports growth, change, and long-term maintainability.
- 03
Building with discipline and visibility
Development happens in controlled iterations, with regular communication and working software. Progress stays visible, and technical risk is managed continuously — not deferred.
- 04
Preparing for real-world use
We focus on performance, reliability, and edge cases to ensure the product holds up under real users, real data, and real load — not just internal testing.
- 05
Leaving you with something sustainable
We deliver clean, documented, maintainable code that your team can confidently operate, extend, and scale — without rewrites or dependency on us.
Not sure which service fits?
Most engagements begin with a conversation, not a proposal. Tell us what you're building or what's going wrong, and we'll tell you honestly whether and how we can help.