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Allan KleinAK

Allan Klein

Full-Stack & Mobile Developer (Angular/Java) AI

€350/day
Paris 17e Arrondissement, FR
3-7 years

Average response time: 1 hour

Freelancer profile translated to English.
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About Allan

Hello 👋 My name is Allan :)

Developer since 2017 and graduate engineer with a Master's in AI (EPITECH) after 6 years of study.

Do you have a Startup/SME and are looking for an autonomous technical partner who understands your business challenges? My goal: to translate your needs into reliable applications.

🎯 My dual Tech & Business expertise
I spent 4 years in the demanding fields of audit and finance. I understand the reality of your business: cost control, deadlines, data security, and profitability.

💡 How I can help you:

🚀 Startups (MVP): Ultra-fast prototyping using AI workflows (Claude Code, Lovable, Stitch AI) to drastically reduce your time-to-market.

🏢 SMEs: Creation of robust and secure websites to automate your processes and manage your data.

📱 Mobile: iOS/Android development with a single codebase to optimize your time and budget.

🛠️ My Technical Stack:

Front & Mobile: React, TypeScript, JavaScript, Angular

Back-End: Java, PHP, Node.js

🔁 My method (100% transparent):

Full visibility: I integrate with your tools (Jira, Notion...) or create a dedicated tracking space.

Communication: A quick daily update (email or call) on project progress.

Quality: Clean, documented, sustainable, and easily maintainable code.

💁‍♂️ About me:
Son of an IT technician, I grew up with a mouse in my hand and a bookshelf filled with the latest Linux Magazine issues. A tinkerer, I started experimenting with the beginnings of what would become my future profession in middle school, using the home Freebox as a server for the school newspaper. I forged my approach to software engineering through intensive training for over 6 years (42, The Hacking Project, HETIC, EPITECH).

📩 Ready to accelerate your project?
Write to me so we can discuss the best technical approach for your business :)
  • English

    Fluent

  • French

    Native or bilingual

  • Spanish

    Basic

Can work on-site
Paris 17e Arrondissement (up to 30km)

Experience

  • FREELANCE
    DEVELOPER
    DIGITAL AND IT
    April 2026 - Today (4 months)
    Paris, France
    Development of a mobile application for K-Pop collectors. Front-end: React, TypeScript, Tailwind, communication with the external Discogs API for information retrieval, and creation of a dedicated Spring Boot backend for data management and barcode scanning. Deployment on OVH VPS.
  • Grant Thornton
    Full-Stack Software Engineer
    CONSULTING AND AUDITS
    September 2021 - November 2025 (4 years and 2 months)
    Neuilly-sur-Seine, France
    For 4 years within Grant Thornton's IT department, I designed critical Finance and HR applications by combining audit requirements with software engineering. My major achievements:

    - Mobile Apps & AI: Design of innovative internal tools (OCR integration) to digitize and simplify field employee processes.

    - Back-End & ERP Architectures: Development of RESTful APIs (Java/Spring Boot) managing complex financial flows, with highly secure interfacing to the company's ERP.

    - Data Engineering & Automation: Modernization of ingestion processes and increased reliability of sensitive data transfers within the information system.

    Technical Environment & Methodology:
    Working within a Tech & Data team embedded in the Microsoft ecosystem (Azure, Office 365 suite, Dynamics 365, SharePoint), I consolidated rigorous production standards. My daily work revolved around agile methodologies, continuous integration via Azure DevOps, and a systematic software testing culture to ensure the reliability of processed data.
    Spring boot REST API Microsoft Azure Dev Ops Angular
  • Wing
    Front-end developer
    LOGISTICS AND SUPPLY CHAIN
    June 2019 - April 2020 (10 months)
    Saint-Ouen, France
    Creation of end-to-end tests with Cypress. Refactoring of the site with the Ant-Design library and Redux for better maintainability of the Admin and Client parts. Queries to the MongoDB database with GraphQL. IT Support and Configuration of the development environment on several computers.
    MongoDB GraphQL Front-End Development React.js Node.js

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Education

  • Master's Degree in AI Engineering
    Epitech
    2024
  • Introduction to web development
    The Hacking Project
    2017

Skill set

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