Open to work — full stack dev / junior project manager

Julien Pierson

I design and build modern web applications, from the database to production.

4+ years across the JavaScript/TypeScript ecosystem. Next.js · React · Node.js · PostgreSQL. A dual engineering & product mindset, built in agencies and then as co-founder & CTO of Najumi.

View my work Get in touch rethrow.io

profile.ts

// product-minded dev
const julien = {
  role: "Full Stack Developer",
  stack: ["Next.js", "React", "TS"],
  backend: ["Node", "PostgreSQL"],
  based: "Lyon, FR",
  english: "B2",
  status: "open to work",
}

Years of experience

Projects shipped

SaaS & ERPs built

Published plugins

TypeScript✦React✦Next.js✦Node.js✦PostgreSQL✦Prisma✦Astro✦Tailwind CSS✦Stripe✦Supabase✦Docker✦GraphQL✦Playwright✦WordPress✦OpenAI✦GitHub Actions✦

⌘

Lyon, France

French (native) · English (B2)

About

A product-minded developer, from scoping to shipping

Full stack developer with 4+ years of experience across the modern JavaScript/TypeScript ecosystem. I design and build web applications from scratch — from data modelling to production — on Next.js (App Router) / React / Node.js / PostgreSQL / Prisma stacks.

A dual engineering-and-product mindset, built in agencies (BIM Digital, Smartfire) then as co-founder & CTO of Najumi, where I owned the stack and shipped client projects end to end: marketplaces, SaaS, ERPs, plugins and websites. As comfortable framing a need, prioritising a backlog and coordinating stakeholders as writing the code.

Full stack development (front → back)
Architecture & database modelling
Product scoping, specs & backlog management
Deployment, CI/CD & shipping to production

Stack & tools

What I build with

A modern JavaScript/TypeScript stack, from frontend to deployment — plus just enough Python, PHP and advanced WordPress.

◇

Frontend

React 19
Next.js (App Router, RSC, Server Actions)
TypeScript
Tailwind CSS v4
Radix UI / shadcn
react-hook-form + Zod
SWR / TanStack
Astro 5
GSAP
i18next / next-intl

⧉

Backend

Node.js
API Routes / Server Actions
NextAuth (JWT) & BetterAuth
Stripe (Payment Intents, Connect, Webhooks)
GraphQL
REST
OpenAI API
Nodemailer + React Email

⛁

Database

PostgreSQL
Prisma ORM
Supabase
Row Level Security (RLS)
Migrations & transactions
SQLAlchemy

⚙

DevOps & Infra

Docker / Docker Compose
GitHub Actions (CI/CD)
Vercel
PM2
Cloudflare Workers
Apache reverse proxy
MinIO (S3)
Turborepo / pnpm workspaces
Cron jobs

✓

Testing & Quality

Playwright (E2E + visual QA)
ESLint / Prettier
Husky + lint-staged
Conventional Commits

❏

CMS & Plugins

WordPress (Bedrock, FSE)
Blocks Gutenberg (React/TS)
ACF / WooCommerce
Strapi 5 (plugins custom)
TinaCMS

Languages

TypeScript / JavaScript
Python (Typer, SQLAlchemy)
PHP 8.x
SQL

◈

Project management

Agile / Scrum · Cycle en V
Cadrage & specs fonctionnelles
Gestion de backlog & priorisation
Coordination des parties prenantes
ClickUp / Linear / Kanban

Selected work

Real projects, shipped to production

Marketplaces, SaaS, ERPs, plugins and websites — designed and built end to end. Filter by type.

16 projects

MarketplaceNajumi

Featured

Rethrow

Bilingual FR/EN marketplace for vintage hardware, designed and built from scratch.

Seller management via Stripe Connect, Payment Intents + webhooks.
Full admin back-office and Mondial Relay integration (pickup points + tracking 4×/day).
Advanced SEO (dynamic sitemap, JSON-LD, dynamic OG), i18n across 20 namespaces.
Security: dual-layer rate limiting, magic-byte upload validation, DB-less JWT.

Next.js 16
React 19
TypeScript
Prisma
PostgreSQL
Stripe Connect
NextAuth
MinIO
Playwright

View project↳

SaaSNajumi

Featured

Metalead

B2B SaaS for lead and quote management, multi-tenant architecture with per-company access control.

42 API routes, 64 server actions, 85 components, 20+ Prisma models.
Stripe webhooks, invoice generation, dynamic product configurator (RHF + Zod).
Transactional emails (React Email), CSV export, 13 admin modules.

Next.js 16
React 19
TypeScript
Prisma
Supabase
NextAuth
Stripe
TanStack Table

Private code↳

SaaSNajumi

Featured

ERP 4Colors

Internal ERP built as a monorepo, from data management to production.

pnpm workspaces monorepo (2 apps + 3 shared packages).
BetterAuth + Notion OAuth, versioned Supabase migrations.
Playwright E2E suite and a dedicated email service (React Email).

Turborepo
Next.js 16
TypeScript
Supabase
BetterAuth
Notion OAuth
Playwright

Private code↳

SaaSNajumi

Featured

HookLab

AI-assisted SaaS for generating viral content, with a credit system and subscriptions.

OpenAI integration (GPT-4o-mini) with tuned prompts and a PAS framework for UGC scripts.
Credit system + daily rate limiting, Stripe subscriptions (webhooks).
PostgreSQL RLS, Supabase auth middleware, bilingual FR/EN interface.

Next.js 16
React 19
OpenAI API
Supabase (RLS)
Stripe Subscriptions
next-intl

Private code↳

PluginNajumi

Featured

Plugin Twenty CRM

Native plugin for the open-source Twenty CRM, prospecting-focused, on a Remote DOM architecture.

Remote DOM (worker thread), 23 files / ~3,650 LOC, 11 custom hooks.
Sortable/filterable call queue, 7-day calendar panel with auto-generated Google Meet links.
Contact scoring, call history, 13 color-coded statuses.

Twenty SDK
React 19
TypeScript
GraphQL
Google Calendar API
Remote DOM

Private code↳

Tools & CLINajumi

Featured

WP Autopilot

Automated Figma → WordPress pipeline: full theme generation with visual QA.

Auto-generated themes (theme.json, Gutenberg blocks, patterns) from Figma.
Visual QA via Playwright screenshots (desktop + mobile).
8-phase orchestration (bootstrap → audit → blocks → QA → delivery).

Node.js
Playwright
WP-CLI
MCP Figma
GitHub API
Docker

Private code↳

PluginNajumi

najumi-strapi

Strapi 5 plugin that triggers GitHub Actions workflows from the admin panel.

Configuration UI, admin-only API routes, i18n.

Strapi 5
React 18
TypeScript
Styled Components

Published on GitHub Packages↳

PluginNajumi

najumi-mega-menu-block

FSE Gutenberg block (~1,400 LOC): accessible mega menu for core/navigation.

ARIA, keyboard navigation and focus management, custom template parts.

WordPress FSE
Gutenberg
React
TypeScript

Private code↳

WebsiteNajumi

Astro SmarTime

Marketing site with a headless CMS and full Docker orchestration.

9 Strapi content types, automated seed pipeline.

Astro 5
Strapi 5
PostgreSQL 15
Docker Compose
GSAP
Turborepo

Private code↳

Tools & CLINajumi

Liste de Lead

Python CLI for multi-source lead enrichment & scoring.

7 CLI commands, configurable YAML scoring engine, Playwright scraping.

Python 3.11
SQLAlchemy 2
Typer
Playwright
Pappers / Société.com
Google Sheets API

Private code↳

Tools & CLIPersonal project

Signe Mon Drapeau

Interactive web tool for customising flags, in real time.

Real-time customisation (React state), Prisma persistence, Vercel Blob storage.

Next.js 16
TypeScript
Prisma
Vercel Blob
Tailwind

Private code~

WebsiteNajumi

Vey Events

Corporate site for a B2B events agency, custom FSE theme.

Events/portfolio CPTs, GSAP animations, REST API exposing events.

WordPress Bedrock
FSE
PHP 8.4
GSAP
ACF
Yoast SEO

Private code↳

WebsiteSmartfire

FNDSA — Foyer Notre-Dame des Sans-Abri

Nonprofit website with an integrated donation module.

Interactive map (Interactivity API), iRaiser donation calculator, social sharing.

WordPress Bedrock
FSE
Gutenberg TS
Interactivity API
Gravity Forms
iRaiser

View project↳

WebsiteSmartfire

Maxi Zoo — Pressroom

B2B pressroom / media hub with a block-level design system.

CPTs & taxonomies, ACF Pro via Composer, Redis cache + WP Rocket.

WordPress Bedrock
Block Party FSE
PHP 8.3
ACF Pro
WP Rocket
Redis

Client project↳

WebsiteSmartfire

Monet RP

High-fashion showcase site, refined animations and a git-based CMS.

Astro + TinaCMS, GSAP + Lenis animations, Cloudflare Workers deployment.

Astro 5
TinaCMS
TypeScript
Cloudflare Workers
GSAP
Lenis

Client project↳

WebsiteSmartfire

Desjoyaux.fr

Feature work & maintenance on the Desjoyaux Piscines group website.

WordPress
PHP

View project↳

Career

Professional experience

Najumi

Apr. 2024 — Aug. 2026

Co-founder & CTO · Lyon

Digital studio focused on modern web projects. I defined the stack, designed the architecture and built internal & client projects end to end.

Leading web projects, from requirement scoping to production release.
Defining and rolling out the company's technology strategy.
Owning client relationships and coordinating stakeholders (quality, deadlines, delivery consistency).

Next.js
React
PostgreSQL
Stripe
Docker
ClickUp / Agile

Smartfire — Groupe CEETADEL

Aug. 2024 — Aug. 2025

Full Stack Developer · Lyon

Building websites & applications for large-account clients.

Gathering requirements and translating them into functional and technical solutions.
Advanced WordPress development (Bedrock, FSE, TypeScript Gutenberg blocks) and Astro.
Handling change requests and supporting delivery — FNDSA, Maxi Zoo, Monet RP, Desjoyaux.

WordPress
Astro 5
TypeScript
PHP 8
Cloudflare Workers

BIM Digital

Sep. 2022 — Jul. 2024

Full Stack Developer · Lyon

First full stack role — ramping up on the modern JavaScript ecosystem and advanced WordPress.

Building custom WordPress sites and Next.js + TypeScript + Prisma applications.
Technical scoping of client needs, database design and deployment.

Next.js
TypeScript
Prisma
WordPress
GSAP

Education

RNCP Level 7 (Master's) — IS Project Manager

2022 — 2025

Institut G4 — Lyon

Major in Computer Science & Project Management — web/mobile development, software development, project management (Agile / V-model).

2-year technical degree — Multimedia & Internet (MMI)

2020 — 2022

IUT de Grenoble

Web development, interface design and digital communication.

Contact

Let's build something together

I'm open to full stack developer and junior project manager / PO roles. A question, a project, or just want to chat? Drop me a line.

Send me an email

Emailjulienpiersonpro@gmail.com Phone07 88 18 43 69 LinkedInin/julien-pierson

Download my resume

Developer resume IT Project Manager resume