Principal AI Engineer

MOSTAFA DARAHEM

AI systems, engineered for reality.

Generative AI · Conversational AI · RAG · Voice AI · Evaluation

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I work at the intersection of language, retrieval, voice, and evaluation — turning AI prototypes into dependable systems.

Where the signal moves

  • 01

    Language

    Understanding intent beyond literal words.

  • 02

    Knowledge

    Connecting questions to reliable, traceable information.

  • 03

    Voice

    Turning human speech into useful intelligence.

  • 04

    Evaluation

    Measuring quality before users discover the failures.

Selected Systems

The Project Observatory

Selected Systems

Conversational AI Quality & Evaluation

Systematic quality measurement for large-scale conversational AI

Problem
Conversational systems built on large language models can degrade in ways that are invisible to standard uptime and latency monitoring — a model can respond instantly and still be wrong, off-tone, or ungrounded.
Approach
Designed an evaluation layer that scores conversations against defined quality dimensions — correctness, groundedness, tone, and task completion — combining automated LLM-based judges with structured human review, so regressions are caught before they reach production traffic.
Outcome
A repeatable evaluation pipeline that turns "does the model seem fine" into a measurable, versioned signal the team can track release over release.
  • LLM Evaluation
  • Conversational AI
  • Quality Assurance
  • LLM-as-judge
View system →

Selected Systems

Conversational AI Quality & Evaluation

Systematic quality measurement for large-scale conversational AI

  • LLM Evaluation
  • Conversational AI
  • Quality Assurance
  • LLM-as-judge
View system →

Selected Systems

Structured Knowledge Systems

Retrieval-augmented systems that connect language models to trustworthy sources

  • RAG
  • Retrieval
  • Vector Search
  • Knowledge Systems
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Selected Systems

Arabic Voice Intelligence

Voice AI systems built for the realities of spoken Arabic

  • Voice AI
  • Speech Recognition
  • Arabic NLP
  • Dialect Understanding
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About Mostafa

Mostafa Darahem is a Principal AI Engineer and AI Systems Architect based in Cairo, Egypt. He designs and leads production-grade AI systems across generative AI, retrieval-augmented generation, conversational and voice AI, document intelligence, evaluation, automation, and private deployment—especially for enterprise and public-sector environments where accuracy, privacy, auditability, and reliable delivery matter.

He works through two clear routes: launching a digital business from idea to working product with a specialist delivery team, or adding an AI engine to an existing business to improve its knowledge, operations, customer experience, and decision-making.

  • Generative AI

    Applying large language models to real production constraints, not demos.

  • Conversational AI

    Designing dialogue systems that stay coherent, grounded, and controllable.

  • Knowledge Retrieval

    Connecting language models to reliable, traceable sources of truth.

  • Voice AI

    Turning speech into structured, actionable intelligence — in Arabic and English.

  • Evaluation

    Measuring model quality systematically, before users discover the failures.

Contact

Let's talk systems.

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DARA

Mostafa's Presence Relay

I know the timing. You own the urgency.

This reflects Mostafa’s local time in Cairo, not yours.