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TZ Dev

Node.js · NestJS · Next.js · in production

Web apps that are solid, built for your business.

Business applications, SaaS platforms and takeovers of existing projects. I design, build and run them in production — from the data model to the server — with scope and price fixed before we start.

Based in France · remote projects across Europe and worldwide · FR / EN / AR

  • RNCP level 6Application designer & developer
  • SaaS in productionDesigned, deployed and run solo
  • Fixed priceAgreed in writing before any code

Production stack

  • TypeScript
  • Node.js
  • NestJS
  • React
  • Next.js
  • MongoDB
  • Redis
  • Docker
  • Nginx
Services

Four areas of expertise. No dilution.

I focus on applications where solid code matters more than looks: internal tools, platforms, integrations.

01 · Where to start

Takeover & modernisation

Your application exists but it’s slow, fragile, or the previous developer has left. I audit it, stabilise it and get it ready to evolve again.

  • Performance and security audit
  • Taking over an unfinished project
  • Migration to a modern stack
02

Custom business applications

Tools built around the way you work, replacing spreadsheets and double entry.

03

Multi-tenant SaaS platforms

Software sold by subscription, each customer in its own isolated, secure space.

04

APIs & integrations

Getting tools to talk to each other that were never designed to: payments, ERP, accounting, CRM, imports and syncs.

Industries

Pick your industry, see what I can build.

Examples of projects I can deliver, not client references. Industry not listed? Just describe what you need.

Industry 01 / 08Projects I can deliver

Retail & distribution

Manage stock, orders and resellers without spreadsheets or double entry.

  • Multi-warehouse stock and order back-office
  • B2B ordering portal for resellers
  • Product catalogue with per-client pricing
  • Sales and margin dashboard
Typical features
  • Roles & permissions
  • Excel exports
  • Stock alerts
  • ERP connection
Discuss a project in this industry

Out of scope in every industry: artificial intelligence projects (language models, chatbots, semantic search).

Pricing

Prices fixed upfront, never by the hour.

To build

Development in phases

On quote

Fixed price for each phase

  • Written proposal before we start
  • Short phases, a demo at the end of each
  • You own the code and the access
Request a quote
To get startedRecommended

Diagnostic

from700 €excl. VAT

2 working days

  • Review of the code, database and server
  • Written report, prioritised and costed
  • 45-minute debrief
Request a diagnostic
To last

Monthly maintenance

On quote

  • Verified updates and backups
  • Small changes within the agreed volume
  • Handled within 48 business hours
Request a quote
Before building

A paid scoping, deducted from the build

For a large project, I start with a scoping: you know what will be built, in what order and within what budget range, before you commit to the build.

Diagnostic or scoping S

from700 €excl. VAT

Audit of an application or an idea, or scoping of a simple project: scope, prioritised backlog, estimate in ranges, risks.

Scoping M

from1,800 €excl. VAT

For a larger project: detailed scope, wireframes of the key screens, split into phases, architecture, estimate and schedule.

The scoping fee is deducted from the build quote if you accept it within 30 days of paying the scoping.

Request a scoping
Case study

A B2B SaaS platform, designed, deployed and run solo.

Client management, marketing and data analysis for service businesses, in production. Built from the first line to the server.

  1. Multi-tenant architecture, data isolated per organisation
  2. Roles, subscriptions and online payment
  3. PDF reports in each client’s colours
  4. Docker on a Linux server, continuous security audits
Process

How a project runs

No technical vocabulary needed on your side.

  1. Understanding the need

    A 30-minute conversation about your business and what’s blocking you today.

  2. Written proposal

    Scope, phases, schedule and fixed price. Nothing starts without your approval.

  3. Development in stages

    Each phase ends with a version you can see and use.

  4. Testing and go-live

    Testing, security review, deployment and handover to your teams.

  5. Warranty and follow-up

    A warranty period, then monthly maintenance if you wish.

What I don’t do

So you know straight away whether I’m the right person.

  • WordPress or Wix brochure sites
  • Native iOS / Android apps — I build web applications that work on mobile
  • Artificial intelligence
  • 24/7 on-call and managed hosting
  • Branding, SEO, social media

Background

  • Application designer & developerLevel 6 professional title · RNCP 37873 · Holberton School, Laval
    2026
  • Web and mobile web developerLevel 5 professional title · RNCP 37674 · Holberton School, Laval
    2024
  • Bachelor’s in information technologyInitial education

Working languages: French · English · Arabic

Quote request

Get your quote.

Describe your project in a few lines. Within 48 business hours you get a first reply, then, depending on the project, a quote or a scoping proposal after a short call. Free reply, no commitment.

Free reply, no commitment · within 48 business hours