Multi-tenant SaaS
Reference architecture for a multi-tenant B2B SaaS: data isolation, billing, deployments.
Development • Support • Migration • Cloud • Maintenance
Your partner to build, fix and evolve your digital solutions.
Mobile applications, web platforms, WordPress, PrestaShop, cloud, DevOps, migrations and technical support: Agencei supports your business from design to solving the most complex problems.
Where to start?
What can we do for you?
Start from your situation: we adapt the engagement, not the other way round.
Build a product
Mobile app, web platform, SaaS or business tool.
Describe my needFix a problem
Bug, outage, server error, WordPress issue or unstable application.
Describe my needModernize a solution
Redesign, migration, version upgrade or replacement of an ageing architecture.
Describe my needMigrate an infrastructure
Server, cloud, database, hosting or application.
Describe my needMaintain a platform
Monitoring, updates, fixes and continuous improvement.
Describe my needAutomate with AI
AI agents, business automation, APIs and model integration.
Describe my needServices
Precise services for precise needs
Each service has a dedicated page describing intervention situations, the process and the technologies used.
Mobile app
Native or React Native apps for iOS and Android, from scoping to app store publication.
See this serviceWeb application
Business tools, portals and back offices built with React, Next.js, Node.js and Spring Boot.
See this serviceCustom software
Business software designed around your processes when off-the-shelf solutions fall short.
See this serviceWordPress Agency
Custom themes and plugins, headless WordPress, performance and security for a site built to last.
See this servicePrestaShop Agency
Custom PrestaShop modules and themes, takeover of 1.6, 1.7 and 8 stores, performance and integrations.
See this serviceWebsite Migration
We move your website (host, domain, HTTPS, CMS) with no downtime and no lost Google rankings.
See this serviceAWS Services
Design, deployment and optimisation of AWS infrastructure: compute, databases, storage, IAM, costs.
See this serviceDevOps Consulting
Setting up CI/CD, infrastructure as code, monitoring and GitOps practices.
See this serviceIT Support
Application and server support, incident handling and clear service commitments.
See this serviceBug Fixing
Reproduction, root cause and tested fix on your web, mobile, API and CMS applications.
See this serviceIT Maintenance
Monitoring, updates, backups and continuous improvement of your applications in production.
See this serviceTechnical Audit
Independent review of code, architecture and infrastructure, with a prioritised report.
See this serviceDatabase services
Design, optimization, administration and backups for your PostgreSQL, MySQL, MongoDB and Redis databases.
See this serviceArtificial intelligence
LLM-based solutions, RAG, document processing, classification and assistants, secured and evaluated.
See this serviceBusiness automation
Workflows, API integrations, scripts and scheduled jobs, with n8n, Make or custom code.
See this serviceSupport & troubleshooting
Looking to fix a problem instead?
Slow site, 500 error, hacked site, unreachable server: our problem pages explain the causes, the checks to perform and how we help.
Method
How we work
- 01
Understand before acting
A first exchange to qualify the need, urgency and constraints. We answer with an analysis and options, not a generic quote.
- 02
Deliver in visible steps
Short iterations, accessible test environment, regular demos and decisions taken together.
- 03
Clean code, documentation
Readable, tested code, a repository you own, documentation and knowledge transfer at the end of the engagement.
- 04
Secure and maintain
Backups, monitoring, updates and support after go-live, with a contact who knows your platform.
Technologies
A stack mastered end to end
From mobile front-ends to cloud infrastructure, through CMS and databases.
- React
- Next.js
- React Native
- TypeScript
- Java
- Spring Boot
- Node.js
- Python
- AWS
- Docker
- Kubernetes
- Terraform
- PostgreSQL
- MySQL
- MongoDB
- Redis
- Kafka
- WordPress
- WooCommerce
- PrestaShop
- GitHub
- GitLab
What you can expect from us
Technical expertise
Custom development, architecture, cloud, data and AI: one team able to take a project from A to Z.
Responsiveness
A direct contact channel and fast qualification of every request, especially for incidents.
Seriousness and transparency
No invented figures or vague promises: a clear scope, deliverables and a report at every step.
Confidentiality
Secure access, data handled with care, non-disclosure agreement on request.
Case studies and reference architectures
Detailed projects, clearly identified as demonstrative or reference when they do not correspond to a named client.
WordPress cloud migration
Demo project: moving WordPress off shared hosting to a Docker VPS with caching, CDN, backups and CI.
Latest articles
Technical guides written by our engineers.
HTTP 500 Error: A Method to Diagnose Any Application
A 500 error says only one thing: the server failed. Finding out why takes a method, not luck. Here is the one we apply, whatever the technology.
· 5 min read
Core Web Vitals: Understanding LCP, INP and CLS and How to Fix Them
Core Web Vitals are the three metrics Google uses to measure the user experience of a page. Here is what they measure, their thresholds, and the fixes that work.
· 4 min read
Zero-Downtime Database Migration: The Strategies That Work
Changing engine, schema or host without cutting the service is possible, provided you choose the right strategy and prepare the cutover. Here are the proven approaches and when to use each one.
· 4 min read
Tell us about your project
Describe your need in a few lines: we come back to you with a first analysis and the next steps.