Software design & development
At Etixio, software design and development covers your business applications, SaaS products, web and mobile interfaces, and the AI features built into them. We handle the full journey: use cases, architecture, code, integrations, testing, go-live and maintenance.
Companies and software vendors launching, growing or taking over a business, SaaS or mobile application
Design, development, integrations, testing, go-live and maintenance of your software
Symfony, Java, .NET, Node.js, Python, React, Flutter, PostgreSQL, AWS, Azure; OpenAI, Claude, Gemini
Fixed-price project for a defined scope, dedicated team for a product that evolves over time
What we build
When operations rely on spreadsheets, re-keying or several poorly connected tools, we study the whole process. The software can centralize a case file, organize approvals or automate a data exchange. Screens follow users’ real tasks and your business rules.
We develop customer portals, admin interfaces and the services the product needs. Accounts, roles, partner integrations and mobile user journeys are designed together. For a software vendor, roadmap continuity and differences between customers factor into architecture decisions.
Before changing a piece of software, we examine how it works, its dependencies and its deployment conditions. We identify the behavior to preserve and the parts to rework. A gradual migration can address weak points without halting all product development work.
What it is for
A software package or CMS covers the essentials but forces workarounds, re-keying or parallel spreadsheets. Custom software follows your rules rather than the other way around.
SaaS platform, customer portal, mobile app: the product has to ship, then evolve at the pace of the roadmap without losing accumulated knowledge.
Code that is hard to change, outdated dependencies, risky deployments. A takeover starts with a diagnosis, followed by gradual modernization.
An assistant, document search, extraction or summarization must fit into the existing application’s screens, access rights and data.
Delivery in practice
Etixio works on the web and mobile product for travelers and on building a B2B affiliate platform. Both scopes require coordinating user journeys, application services and product priorities.
The work draws in particular on Java, React and Flutter, with development, design, project management and QA skills. This case study shows how several areas of expertise contribute to a single product rather than amounting to a list of technologies.
From work to deliverables
We turn use cases into user journeys, business rules and acceptance testing criteria. The architecture specifies the components, data exchanges and interfaces with your information system. Decisions that commit maintenance or budget are discussed before they become code dependencies.
We build the interfaces, APIs, business logic and background processing. Connecting to an ERP, a CRM or an external provider includes errors, retries and access controls. Features are delivered in sets that users can review and validate.
Tests cover critical rules and exchanges between components. We prepare the environments, configurations, deployment procedure and post-release checks. The code, access and documentation for the delivered scope accompany the handover to your team.
AI assistance can make it easier to explore code, prepare tests or make certain changes. It remains part of these review and validation practices. It does not remove the need to understand the business or to verify the software in its environment.
Software development and AI
We integrate AI where it delivers a measurable service: an assistant in a customer portal, search across a document repository, extracting fields from incoming documents, summarizing a case file. The model becomes a component of the application, with its own access rights, logs, evaluations and usage tracking.
We also take over AI prototypes or applications built quickly with AI tools and bring them to production level: architecture, security, testing and deployment. See our enterprise AI solutions and our AI agents connected to your tools.
Technologies we master
PHP and Symfony, Laravel, Java and Spring Boot, .NET, Node.js and NestJS, Python, Go.
React, Next.js, Angular, Vue.js, Flutter, React Native, Swift and Kotlin.
PostgreSQL, MySQL, MongoDB, Redis, Docker, Kubernetes, AWS, Azure and continuous integration pipelines.
OpenAI, Claude and Gemini models, document search (RAG), agents and evaluation tools.
The choices that matter
We start from your constraints: team skills, existing technologies, integrations, volumes, availability and operating budget. An internal application, a consumer product and a service integrated into an information system do not necessarily call for the same architecture.
A useful first scope can be built without planning every future feature. However, the topics that are hard to rework later — identity, data, separation of concerns and deployment — deserve to be scoped from the start. The options chosen and their consequences stay documented.
How we work together
Scoping separates priority features, integrations, data migration and quality work. The estimate sets out its assumptions. A change in requirements leads to a trade-off on content, schedule and budget before the planned work is modified.
Your team owns the business priorities and takes part in acceptance testing. We organize delivery, reviews and demos of the agreed scope. Contacts, tracking tools and responsibilities are defined at the start.
Go-live opens a new phase: fixing incidents, gathering feedback and evolving features. The maintenance framework specifies the expected work. Documentation and handover allow your team to understand the product and continue its development.
A defined scope can be delivered as a fixed-price project. A product that evolves over time is entrusted to a dedicated team of French-speaking engineers in Madagascar and Mauritius, led by a tech lead, with a 1 to 3-hour time difference from Paris.
Frequently asked questions
Business applications and internal tools, SaaS platforms, customer portals, web and mobile applications, as well as the APIs and integrations that connect them to your information system. We also add AI features to this software.
No. A first conversation about users, processes and pain points is enough. Scoping then turns that need into user journeys, business rules, priorities and an estimate with its assumptions.
Yes. We first examine the code, dependencies and deployment conditions, then identify the behavior to preserve and the parts to rework. Modernization is preferably done in steps, without interrupting product development.
Based on your constraints, not our preferences. Your team’s skills, existing technologies, integrations, volumes, availability and operating budget guide the choice, and the options chosen are documented.
Through code reviews, automated tests on critical rules and exchanges between components, a documented deployment procedure and post-release checks. A tech lead oversees the team and remains accountable for quality.
Yes. An assistant, document search, extraction or summarization is integrated as a service of the application, with the same security, testing and monitoring rules as the rest of the code. We can also take over an AI prototype and make it production-ready.
You do. The code, configurations, access and documentation for the delivered scope are handed over to you so your team can understand the product and continue its development.
Yes. The maintenance framework specifies the expected work — fixes, dependency updates, security, feature changes — and the associated response times.
Tell us what you want to build, who the users are and what your technical environment looks like. Together, we will define the first scope to explore.