Youssef Sayeh
Play as Sayeh

Open to remote work

Youssef Sayeh

Full-stack and ML developer · Co-founder of VOUCH

I build from the database to the interface: models and APIs in Python, web apps in TypeScript, automations in n8n. I co-founded VOUCH with Marawan El Serafy, and we built Mizan end to end together.

youssefislamsayeh@gmail.com · linkedin.com/in/youssef-elsayeh-643622326 · its-sayeh.pages.dev

Email me LinkedIn
  • TypeScript
  • Next.js
  • React
  • Python
  • FastAPI
  • PostgreSQL
  • Tailwind CSS
  • Docker
  • n8n
  • GitHub Actions

Character sheet

The short version, for anyone hiring.

Sayeh
Name
Youssef Sayeh
Role
Full-stack and ML developer
Company
Co-founder of VOUCH
Education
Computer Engineering student, Alamein International University
Based in
Egypt, on Cairo time (UTC+2, UTC+3 in summer)
Languages
Arabic and English
Open to
Remote full-time roles, part-time contracts and freelance projects

Experience

  1. Now

    Co-founder, VOUCH

    Software company, Egypt

    • Built VOUCH, which predicts which cash-on-delivery orders will be refused before they ship: a CatBoost model and FastAPI behind a Next.js dashboard in Arabic and English, with 205 automated tests.
    • Built and sells VOUCH Flows: four n8n automation packs for stores and clinics, with guides in English and Arabic.

  2. Client project

    Developer, Mizan

    Business system for a manufacturing client

    • Designed and built Mizan end to end with Marawan El Serafy: inventory, finance and HR for many companies at once, Arabic first.
    • TypeScript and PostgreSQL 17, with over 1,000 automated tests and checks that reject bad code before it merges.

  3. Studying

    Computer Engineering

    Alamein International University

Projects

Three things I built with Marawan El Serafy. Each has a full case study, with video, on the VOUCH site.

VOUCH live demo scoring a risky order: 90 percent, Reject, with the reasons listed

VOUCH

Predicts which cash-on-delivery orders will be refused at the door, and says why in plain words.

My part: co-founder. Built the model, the API and the dashboard with Marawan.

Live site Case study
Mizan in Arabic: the home screen with the total stock value, next to a printed goods receipt

Mizan

Inventory, finance and HR for Egyptian factories, many companies at once, Arabic first.

My part: designed and built it end to end with Marawan.

Case study
InvoiceFlow review page listing invoices that need review, with the maths error it found

VOUCH Flows

Ready-made automations: WhatsApp order confirmations, AI invoice checks and daily sales reports.

My part: built, tested and sell all four packs with Marawan.

Live site Case study

Skills

What I use day to day. Every one of these is in the projects above.

Languages

PythonTypeScriptJavaScriptSQL

Web

Next.jsReactTailwind CSSFastAPIArabic RTL layouts

Machine learning

CatBoostscikit-learnpandasSHAP

Data

PostgreSQLSQLAlchemyRedis

Automation

n8nWhatsApp Cloud APITelegram botsGemini

Shipping

DockerGitHub ActionsPlaywrightpytestCloudflare

Let's talk.

Email or LinkedIn, whichever you prefer.

Need a team?

VOUCH

Marawan and I work together as VOUCH. For a project that needs both of us, write to the company.

Visit VOUCH Marawan's site