Your business application,
from idea to production.
You have a critical process that deserves better than a spreadsheet or a rigid off-the-shelf tool. We turn it into a custom web application, built entirely in-house, from idea to production.
Real problems, solutions that run
A shared Excel file between dozens of sales reps to track sales and contracts. Nearly a week per month spent deduplicating, chasing reps over inconsistencies, and reconsolidating data. No reliable view at headquarters.
INYSTER built a centralized data entry tool with sales and contract KPIs, signature stage tracking, and automated exports. The shared Excel file was permanently eliminated.
A client received hundreds of supplier invoices every month — PDF, email, EDI, all mixed together. Each invoice was entered by hand, manually matched to purchase orders. Errors, duplicates, late payments.
Files are dropped on a Drive, then n8n handles everything: extraction, automatic deduplication, matching, and feeding a consolidated output Excel. No more manual handling.
Each golf course managed registrations and schedules from an Excel file at the front desk. No consolidated view at headquarters. Reception staff spent hours on the phone handling bookings and schedule changes.
POC in 4 weeks, then iterations toward a complete SaaS. The platform replaced each front desk's Excel and ran for 10 years in production (2014–2024), deployed across 52 golf courses in France and 2 internationally.
46 sales reps spent 40–50% of their time manipulating Excel files to retrieve extracts from suppliers, platforms, and pharmacies. Completely heterogeneous files to manually transform into an exploitable format to identify where to focus their expertise.
An aggregation platform with AI-powered mapping: the system analyzes incoming data structure and automatically proposes field correspondence with the target schema. Sales reps get exploitable data directly.
An apprentice would spend days searching through scattered databases to solve a machine issue. Predictive maintenance required hours of documentation research. Knowledge was spread across systems with no single entry point.
An AI assistant connected to their internal docs — technical documentation, procedures, maintenance history. A single entry point for all company knowledge. No more digging through scattered databases.
Real solutions, not promises
Every project is developed in-house by a senior architect. One point of contact, full control.
POC & MVP
Validate your idea in 2 to 6 weeks with a functional prototype designed to evolve — not to end up in the trash.
Custom Development
Business applications, web portals, dashboards. Architecture built to last, not to impress.
Automation
Eliminate repetitive tasks with automated n8n workflows. Syncs, reporting, onboarding — everything runs without manual intervention.
Artificial Intelligence
Integrate LLMs, RAG and custom chatbots into your business tools to boost your team's productivity.
Support & Maintenance
Custom SLAs, monitoring, continuous improvements. Your application never sleeps without oversight.
The agency that actually builds
100% in-house development
No outsourcing, no team rotation. Your project is carried by a senior architect from day one to production.
The POC that doesn't end up in the trash
Our POC → MVP → Production method ensures every line of code is reusable and scalable.
AI under expert supervision
Artificial intelligence accelerates development, but it's human expertise that guarantees quality.
Your code, your property
No technical lock-in. You own every line of code, every document, every access.
The right tech for the right job
No imposed stack. Every technical choice is justified by your business context, constraints, and goals.
Node.js When API performance and real-time matter 
React For complex, responsive business interfaces 
Java When robustness and maintainability are critical 
Python For data processing and AI integration 
PHP To modernize legacy systems without rewriting everything 
n8n To automate without depending on a closed SaaS Client testimonials
"A true technical partner who understands business challenges. Rare and invaluable in our industry."
"Label generation that used to take a full day now happens in a few clicks. Our 30 franchise stores are autonomous, and regulatory compliance is guaranteed."
"The POC delivered in 3 weeks convinced the board. 6 months later, the tool is in production."
Each of these projects started with a 45-minute conversation.
Let's discuss your needs in 45 minutes. No salespeople, no pitch — just a technical conversation with the founder.