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Expertise · Full-stack development
Full-Stack Developer: Features Delivered End to End
A full-stack developer’s work is to deliver a feature end to end, from the interface to the business logic and the data. At Etixio, our full-stack engineers deliver these complete journeys within a team supervised by a tech lead, including AI features that cut across every layer of the product.
Understanding the technology
Full-stack development in your project.
Full-stack development means delivering a feature across several layers: interface, services and data. It makes it possible to handle a complete journey, provided responsibilities remain explicit and the necessary skills are available for each part. Etixio organizes the work around this functional outcome.
This overall view reduces back-and-forth between front-end and back-end, makes discussions with the product side easier and improves the application’s technical consistency.
The right time
When should you bring in a full-stack developer?
Full-stack development is particularly useful when delivery speed and the consistency of a journey matter more than specialization in each layer.
Speed up releases
Limit dependencies between front-end, back-end and product by entrusting each feature to someone who can take it all the way.
Modernize a specific scope
Rework a screen, an API or a data model without a complete overhaul of the application.
Work in a compact team
In a small product team, versatility covers more ground without making the organization heavier.
Stabilize an existing product
Catch up on a roadmap, reduce technical debt and make the most-used journeys more reliable.
Our scope of work
The work we take on.
Complete journey
Connect the user action, application rules and persistence.
Consistency
Share contracts between front-end and back-end, documented with OpenAPI.
Data & performance
Structure data, optimize queries and set up caching when the load requires it.
Delivery
Verify that the feature works in its target environment.
Our full-stack expertise
The full-stack stacks we master.
Front-end
React, Vue.js, Angular, Next.js and TypeScript. See also our front-end developer page.
Back-end
Node.js, PHP with Symfony or Laravel, Java with Spring Boot, Python and .NET. See also our back-end developer page.
APIs & integrations
REST and GraphQL APIs, webhooks, WebSockets, integration of third-party services (payment, CRM, ERP).
Data & caching
Modeling, migrations and query optimization with PostgreSQL, MySQL or MongoDB as appropriate, Redis caching.
Quality & delivery
Unit, integration and end-to-end tests (Jest, Testing Library, Cypress, Playwright), CI/CD, Git and deployment practices suited to the scope.
Full stack and AI
AI features that cut across the whole product.
Adding an assistant, search across your documents or automatic extraction touches every layer: the screen where the user asks a question and approves the result, the service that calls the model with the right data and permissions, storage of the exchanges and cost tracking. A full-stack profile takes this kind of feature end to end, with targeted reviews on security and evaluations.
It is also the approach we take to pick up an AI POC and put it into production. See our AI solutions for businesses.
In the field
From technology to real-world use.
To add an approval workflow, we evolve the data model, the API and the screens that trigger or display the operation. Permissions and state transitions are tested on the server side, then the feedback is integrated into the interface. Acceptance testing follows the journey end to end.
The choices that matter
The choices to examine before building.
Versatility does not replace targeted reviews on security, the database or user experience. We identify the topics that require additional expertise. Contracts between layers and integration tests prevent each part of the journey from being correct in isolation but inconsistent with the others.
Engagement formats
How our full-stack developers work with you.
Within a dedicated team
A dedicated team evolves your product over the long term, with full-stack, QA, DevOps and product management as needed, supervised by a tech lead.
On a fixed-price project
For an application or a module with a defined scope, a fixed-price project commits to a result, a budget and a timeline.
Build & Run
Development, maintenance and enhancements handled over the long term.
From work to deliverables
Delivery your team can take over.
The scope of work specifies the components to build or take over and the acceptance criteria. We provide what is needed to understand the changes, verify them and continue the work.
- Services and API contracts
- Tests of business rules
- Deployment procedures
Frequently asked questions
Full-stack developer: your questions.
What does a full-stack developer do?
They work across an entire web application — interfaces, business logic, APIs and databases — and deliver complete features while keeping the product technically consistent.
When should you bring in a full-stack developer?
To build an MVP, speed up a product’s releases, modernize a specific scope or evolve a web platform, especially when versatility and speed of execution matter.
Does a full-stack developer replace a front-end developer and a back-end developer?
Not entirely. They cover both layers, but on complex or highly specialized topics (database performance, accessibility, security), they work alongside specialists. We identify these topics from the scoping phase.
Which technologies do your full-stack developers master?
React, Angular, Vue.js, TypeScript and Node.js, PHP with Symfony or Laravel, Java and Spring Boot, .NET, Python, PostgreSQL, MySQL, MongoDB, as well as REST and GraphQL APIs. We start from your existing stack.
How do they fit into an existing team?
They use your tools, take part in your rituals and collaborate with your Product Owners, designers, developers, QA and DevOps. The engineers are French-speaking, based in Madagascar and Mauritius, with a 1 to 3-hour time difference from Paris, and supervised by a tech lead.
How do you ensure the quality of a full-stack feature?
Through shared API contracts, unit, integration and end-to-end tests, code reviews and verification in the target environment before the production release.
Can you build an AI feature end to end?
Yes. We build the interface, the service that calls the model, access to authorized data, evaluations and cost tracking, and can take over an existing AI POC to make it production-ready.
Let’s talk about your technical context.
Tell us about the application, the issue to address and the known constraints. We will review the dependencies and the initial scope of work with your team.