Freelancer profile translated to English.

Description

Independent full-stack developer, I build applications end-to-end – from technical architecture to production deployment, without outsourcing the thinking to anyone else.

My domain ranges from web (Ruby on Rails, Next.js, TypeScript) to cross-platform mobile and desktop (Flutter, .NET MAUI), with a real taste for applied cryptography (Rust). I prefer to deliver complete products rather than isolated components: SeedCrypt, a security application for crypto seed phrases, and Per-Ankh, a learning platform deployed at the edge on Cloudflare, are two projects I designed and coded alone, from the first commit to production.

Educated at ESGi (Bachelor in Blockchain) and with experience in project management for a .NET MAUI application, I bring both technical expertise and organizational skills.

Available for pure development missions – web, mobile, architecture – at €300/day.

Industry field of expertise

Languages

French
Native or bilingual
English
Fluent
Spanish
Conversational

Workplace preferences

Remote only

Primarily works remotely

ITSI SYSTEMS
Project Manager
TELECOMMUNICATIONS
November 2022 - May 2023 (6 months)
Paris 13 Gobelins, France
Development of a cross-platform access control application in .NET MAUI, connected to a SQL database centralizing access events. Project management: design, development of key features, and monitoring until production deployment. Alongside my studies at ESGI.
.NET SQL XAML C# VB.NET
SeedCrypt
Founder & Developer
TECH
March 2026 - Today (5 months)
Paris, France
Solo project: Native application for managing and encrypting crypto seed phrases, designed to replace paper methods or metal plates. 100% offline operation, zero telemetry, on Windows, macOS, and Android. AES-256-GCM encryption with PBKDF2-SHA512 key derivation (600,000 iterations) and anti-brute-force protection. Companion command-line tool, SeedCrypt Recover, developed in Rust and published as open source for restoring damaged BIP-39 phrases. CI/CD pipeline via GitHub Actions for macOS builds, Windows installer via Inno Setup. secp256k1 PointyCastle GitHub
Flutter Dart Rust Cryptography IT Security
Per-Ankh
Founder & Developer
TECH
July 2026 - Today (1 month)
Paris, France
Learning platform for Egyptian hieroglyphs using spaced repetition, with a progression system (XP, streak, leaderboard) and 3D rendering of a stele in Three.js. Next.js 15 (App Router) and React 19 architecture in Server Components / Server Actions, deployed at the edge on Cloudflare Workers via OpenNext. Authentication and data via Supabase (Postgres, Row Level Security), subscription management with Stripe, custom i18n (FR/EN) without heavy dependencies, 95 tests (Vitest, Testing Library), and comprehensive SEO work (sitemap, robots, IndexNow, Search Console).
Next.js React Typescript three.js Stripe

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Bachelor in Computer Science
ESGi
2023
Bachelor Informatique

Maxence K.

Project Manager

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