How long to deliver an application?

Between 8 and 16 weeks for a solid MVP, depending on complexity (number of modules, integrations, multi-platform). We provide a precise timeline from the brief, with clear milestones and weekly check-ins.

What technologies do you use?

We code the majority of our applications in Next.js, React, Node and Postgres, with Tailwind for the frontend and Vercel for hosting. For mobile: React Native, native Swift or native Kotlin depending on needs. We choose the stack that serves your project, not the other way around.

Do you handle mobile (iOS / Android)?

Yes. We can deliver a PWA, a React Native app (cross-platform) or native Swift / Kotlin apps depending on your performance and experience constraints. We advise the best approach from the brief.

How are authentication and security handled?

We integrate proven solutions: SSO Google/Microsoft/Apple, 2FA, OAuth, JWT. Full GDPR compliance, end-to-end encryption, audit trails. We can target SOC 2 Type II if your market requires it.

Does the code truly belong to me?

Yes, 100%. No vendor lock-in, no proprietary platform. You receive the complete source code on your GitHub, with documentation, infrastructure as code and CI/CD pipelines. You can take everything back, evolve or change providers at any time.

What happens after production deployment?

You benefit from 30 days of monitoring included to adjust what needs to be after the first users. Then you can continue with our Application Maintenance offering for evolutions, fixes and new features.

Expertise → Application

Your custom-built application,
designed to scale.

Custom-built web and mobile applications, robust and designed to grow with your users. No laggy no-code, no hidden technical debt.

Start my project→Discover our method →

ApplicationBuilt for businesses that want a product that lasts.

Example of a custom-built business web application developed by Odyssée

Your application is the heart of your business. It must be fast, reliable, secure and capable of evolving as fast as your users.

We design web and mobile applications for businesses that want a product that lasts: no no-code that will break in 12 months, no technical debt, no vendor lock-in. Custom-built, designed to scale.

Start my project→

Our method

From your idea to production,
in four clear steps.

PRD · v1.0

validated

MVP Objective

100 active users
in 90 days

Target

SaaS B2B

Stack

Next + Postgres

Platforms

Web · iOS · Android

MVP

8 modules

Product scoping & architecture

We start with a workshop to understand your vision, users and business constraints. Together we define the priority features and technical foundations that will support your growth.

Design system · Figma

Design tokens

UI Components

ButtonOutlinedInputBadge

◆ Dashboard / 1440 × 900

Design system & wireframes

We design every screen with a coherent, reusable design system. Components, tokens, user journeys: you validate the design and experience.

~/odyssee-app · zsh

$pnpm test --coverage

✓ 248 tests passed · 96% coverage

◢ runtime 4.2s

$git push origin main

git log · mainci passing

7b41e89feat(auth): SSO + 2FA

2d8c1f3feat(api): rate limiting

f0a965btest: 248 specs · 100% pass

Development & CI/CD

We develop with the most reliable technologies on the market. Every feature is tested before going live, every update is tracked. Zero bad surprises.

app.odyssee.fr · prod

healthy

Active users · 12h

↑ +24%

99.99%

Uptime

84ms

Latency p95

5xx Errors

Launch & Management

Secure production deployment, comprehensive monitoring (uptime, latency, errors), usage dashboards and 30 days of monitoring included to adjust based on the first real users.

What we build

Applications designed and developed to grow with your users.

Every application delivered is built to last, perform and evolve with you. Our developments include:

Architecture · production

Web

iOS

Android

API Gateway · Edge

Auth

Core

Jobs

Postgres

Redis

Architecture · production

Web

iOS

Android

API Gateway · Edge

Auth

Core

Jobs

Postgres

Redis

We design applications built to scale from day one: modular architecture, decoupled services, optimised database, Redis cache, job queues. Whether you have 100 or 100,000 users, the app stays fast and stable. No painful rewrite at 18 months.

Auth · 2FA

SSL 256

jeremy@odyssee.fr

SSO Google · verified

2FA Code · expires in 30s

•

GDPR compliant

SOC 2 Type II

E2E Encryption

Audit trails

Robust authentication from the start: SSO, 2FA, OAuth, granular role-based permissions. SSL 256 encryption, full GDPR compliance, audit trails and session management. Your users are protected, you face zero legal or reputational risk.

WebSocket · live

connected

1 284

Active sockets

0ms

Latency p95

12K/s

Messages

Your users never wait. p95 latency under 100 ms, WebSockets for real-time (chat, notifications, collaboration), intelligent caching, network optimisations. The experience stays smooth even during traffic spikes.

Vitest · run #1248

passing

Coverage

96%

auth.spec.ts24

billing.spec.ts38

users.spec.ts52

api/webhooks.spec.ts18

e2e/checkout.spec.ts12

248 tests · 4.2s↑ all green

Every line of code is tested: unit tests, integration tests, end-to-end tests. Minimum 90% coverage. CI/CD pipeline that runs tests, checks quality and deploys automatically with every commit. No regression passes into production.

One codebase · 3 platforms

Web · Next.jsiOS · SwiftAndroid · Kotlin

Web, iOS and Android delivered together from a single codebase when relevant (React Native, Flutter) or native when performance demands it (Swift, Kotlin). Your users get the best possible experience on their device, you keep a lean technical team.

Workflow · API

live

Webhook

API

Upload

Postgres

Push

CRM

Logs · real-time5 events/min

→Push notification sent

→INSERT users · OK

AIDocument classification · 96%

We expose a clean, documented, versioned REST or GraphQL API. We connect your application to your CRM, payment tools, internal workflows and AI models to automate what can be and personalise every user's experience.