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Every idea deserves to exist.

I build custom web applications and systems built on AI agents. The hard part isn't getting them to talk — it's making them reliable.

Got a project in mind?

Contact me

Emile is an AI assistant and can make mistakes. Only Devbrek's word is authoritative. Do not share sensitive data.

Hello, I'm Emile

Devbrek's assistant — ask me anything.

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[ PROJECTS ]

My projects

Seven projects, four of them in production.

TRAPPED × JJB PSL

In production

One-page catalogue for a Brazilian Jiu-Jitsu club, in partnership with the TRAPPED brand — interactive size guide (recommended size calculated from height and weight, men's/women's charts).

Size guideOne-pageNo tracker

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Combate

Alpha Version

An educational site on Brazilian jiu-jitsu: an interactive fight path, one page per position, IBJJF rules by belt and a game plan saved in the browser.

Interactive graphCSS animationsNo backend

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Mylo AI

Alpha Version

AI pedagogical assistant for web developers. Different levels of assistance & code audit.

Web DevCoachPedagogy

View demo →

Lensdesk

Alpha Version

Shooting and equipment management platform for professional photographers.

OrganizationChecklistPlanning

View demo →

Arthur

In production

Personal multi-agent assistant — supervisor routing, vector memory, anti-hallucination guardrails built into the graph.

LangGraphMulti-agentRAG pgvector

View project page →

L'IA et nous

In production

An awareness site about the water and energy footprint of AI, with sourced figures and stated methodological limits. A playground for design and motion work, with no backend.

DesignAnimationAwareness

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Rooted

In production

Demo storefront with a full purchase flow and customer support — a playground for e-commerce interface design.

E-commerceCustomer supportCheckout flow

View demo →

[ STACK ]

The tools. The method.

Technologies chosen for their reliability and consistency.

Frontend

Next.js
React
TypeScript
Tailwind CSS

Backend

Node.js
Prisma
PostgreSQL
Neon

AI

LangChain
Mistral AI
Vercel AI SDK

Tooling

Git
Vercel
Figma
VS Code

[ SERVICES ]

My services

Each quote is customized to the actual complexity of the project.

Daily rate: €275/day

Preliminary technical audit

Audit of an existing codebase outside the JavaScript/TypeScript stack: repository access, local setup, identification of risk areas, informed estimate before a project quote.

1 to 2 days€275 to €550

See details

Included

Repository access and local setup of the project
Identification of risk areas
Informed estimate, provided before the project quote
Written report, sent by email

Not included

The project itself (fixes, development): covered by a separate quote
Third-party service costs (hosting, domain name, APIs), borne by you
Maintenance: separate quote or contract

Full conditions in the Terms & Conditions

Showcase website / landing page

Design and development of modern, fast, and responsive showcase websites.

5 to 8 days€1,375 to €2,200

See details

Included

Scoping, development, back-and-forth, revisions, testing, and deployment of a responsive website
Mockup submitted for your approval
Revisions: the number is specified in the quote
Help setting up third-party accounts (hosting, domain)
Basic SEO (titles, descriptions, sitemap)
Source code, documentation, and a list of dependencies with their licenses, delivered after full payment
One-month warranty: free correction of reported defects

Not included

Copywriting: the content is provided by you
Creation of visuals (logo, photos)
Third-party costs: hosting, domain, APIs, licenses (fonts, images)
Revisions beyond the number set in the quote, billed at the daily rate
New features after delivery
Maintenance: separate quote or contract

Full conditions in the Terms & Conditions

Custom web application

Development of business web applications with authentication, dashboard, database, and features tailored to your needs.

10 to 20 days€2,750 to €5,500

See details

Included

Scoping, development, back-and-forth, revisions, testing, and deployment of a responsive interface
Authentication, dashboard, database, and business features defined in the quote
Mockup submitted for your approval
Revisions: the number is specified in the quote
Help setting up third-party accounts (hosting, database, APIs)
Source code, documentation, and a list of dependencies with their licenses, delivered after full payment
One-month warranty: free correction of reported defects

Not included

Content and data (text, data to be entered), provided by you
Recovery or migration of existing data: quoted if needed
Third-party costs: hosting, domain, APIs, licenses (fonts, images)
Revisions beyond the number set in the quote, billed at the daily rate
Features outside the quote, and new features after delivery
Maintenance: separate quote or contract

Full conditions in the Terms & Conditions

Custom AI Solution

Design and development of an AI solution tailored to your data and processes: assistants, agents, RAG, task automation, and integration with your existing tools. Model selection and orchestration based on the project's requirements.

10 to 20 days€2,750 to €5,500

See details

Included

Scoping, development, back-and-forth, revisions, testing, and deployment
Solution design: assistants, agents, RAG, task automation, integration with your tools
Model selection and orchestration based on the project's requirements
Interface mockup submitted for your approval, when the tool has one
Revisions: the number is specified in the quote
Help setting up third-party accounts, including AI services
Source code, documentation, and a list of dependencies with their licenses, delivered after full payment
One-month warranty: free correction of reported defects

Not included

Third-party costs: hosting, domain, APIs, usage-based AI services, licenses
Third-party AI services: spending limits set by you; availability, pricing, and discontinuation outside my responsibility
Data provided (preparation, accuracy, legality): your responsibility
Model training or fine-tuning
Guaranteed results for AI responses (best-efforts obligation)
Revisions beyond the number set in the quote, billed at the daily rate
Features outside the quote, and new features after delivery
Maintenance: separate quote or contract

Full conditions in the Terms & Conditions

AI integration

Integration of AI features into an existing project: chatbot, conversational assistant, content generation, model calls, or streaming.

6 to 10 days€1,650 to €2,750

See details

Included

Scoping, development, back-and-forth, revisions, testing, and deployment
Integration into your existing project: chatbot, conversational assistant, content generation, model calls, or streaming
Interface mockup submitted for your approval, when the integration has one
Revisions: the number is specified in the quote
Help setting up third-party accounts, including AI services
Source code, documentation, and a list of dependencies with their licenses, delivered after full payment
One-month warranty: free correction of reported defects

Not included

Existing project: access provided by you; preliminary audit billed separately if the project is not in JavaScript/TypeScript
Fixing pre-existing defects in the project: quoted if needed
Third-party costs: hosting, domain, APIs, usage-based AI services, licenses
Third-party AI services: spending limits set by you; availability, pricing, and discontinuation outside my responsibility
Model training or fine-tuning
Guaranteed results for AI responses (best-efforts obligation)
Revisions beyond the number set in the quote, billed at the daily rate
Features outside the quote, and new features after delivery
Maintenance: separate quote or contract

Full conditions in the Terms & Conditions

API / third-party service integration

Connection to external APIs and third-party services: emailing, payment, business tools, storage, or others.

2 to 5 days€550 to €1,375

See details

Included

Scoping, development, back-and-forth, revisions, testing, and deployment
Connection to APIs and third-party services: emailing, payment, business tools, storage, or others
Help setting up third-party accounts; credentials sent by a secure method, never in plain text by email
Revisions: the number is specified in the quote
Source code, documentation, and a list of dependencies with their licenses, delivered after full payment
One-month warranty: free correction of reported defects

Not included

For an existing project: access provided by you; preliminary audit billed separately if the project is not in JavaScript/TypeScript
For an existing project: fixing pre-existing defects, quoted if needed
Third-party costs: subscriptions and usage of the integrated services, hosting, domain, licenses
Third-party services: spending limits set by you; availability, pricing, and discontinuation outside my responsibility
Revisions beyond the number set in the quote, billed at the daily rate
Features outside the quote, and new features after delivery
Maintenance, including adapting to changes in third-party services: separate quote or contract

Full conditions in the Terms & Conditions

Existing website redesign

Modernization, migration, and responsive adaptation of an existing website or application.

7 to 15 days€1,925 to €4,125

See details

Included

Scoping, development, back-and-forth, revisions, testing, and deployment
Modernization and migration (technology, hosting), existing content carried over as is, responsive adaptation
Fixing existing defects within the redesign scope defined in the quote
Mockup submitted for your approval
Revisions: the number is specified in the quote
Basic SEO (titles, descriptions, sitemap) and redirects from old URLs to new ones
Help setting up third-party accounts (hosting, domain)
Source code, documentation, and a list of dependencies with their licenses, delivered after full payment
One-month warranty: free correction of reported defects

Not included

Existing project: access provided by you; preliminary audit billed separately if the project is not in JavaScript/TypeScript
Data migration (database): quoted if needed
Writing new copy: the content is provided by you
Creation of visuals (logo, photos)
Third-party costs: hosting, domain, APIs, licenses (fonts, images)
Revisions beyond the number set in the quote, billed at the daily rate
Features outside the quote, and new features after delivery
Maintenance: separate quote or contract

Full conditions in the Terms & Conditions

These ranges give an order of magnitude for a complete project: scoping, development, back-and-forth, revisions, testing, and deployment. The scope and complexity of the project can shift the estimate.

[ ABOUT ]

Who I am.

I'm Benjamin SANNA, aka Devbrek, and I write code from Montpellier. Custom web applications on one side, AI agent systems on the other. The same care in both cases: readable code, and a product that does what it says.

What occupies me most right now is making AI systems reliable. An assistant that reports an action it never carried out is worse than one that does nothing at all — and no amount of prompt polishing fixes that. It comes down to how the system is built.

I aspire to design in a simple way. The smallest model that does the job, the fewest calls possible, the least data moved around. AI has a real cost, in electricity and water — no reason to spend it on an answer we could have given without it.

My CV and profile

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[ CONTACT ]

Let's talk.

An idea, a project, a question — write.