LH®
CV
AI engineer / backend developer / researcherAlgiers, Algeria · UTC+1

LyesHadjar.

I build backend systems, applied AI products, and Arabic language technology that hold up beyond the demo.

See selected work Download concise CV
Current focus

3 cards. Use the left and right arrow keys to move through them.

01Backend

C#/.NET services behind financial consulting workflows

3+client engagements, estimated
5+production internships
6,086annotated dialect sentences
95.2%character-level IAA
5×hackathon podium finishes
01 / Selected work

Systems with
a reason to exist.

Retrieval, language, and secure-product work presented as engineering decisions—not a wall of technology badges.

Also built
02 / Experience

Shipped inside
real constraints.

Government, industrial, automotive, and financial work across overlapping engineering roles since 2024.

Oct 2025 - PresentAI / Software Engineer InternCommand Strategy AdvisoryParis, France - Remote

Client-facing backend tools and financial consulting workflows built for production delivery.

  • Translate requirements from financial consultants into production-deployable C#/.NET REST API solutions across an estimated 3+ active client engagements.
  • Automate reporting workflows with reusable backend modules, reducing turnaround by an estimated 40%.
C#.NETREST APIs
Jun 2025 - Nov 2025AI / Software Engineer InternMinistry of Higher Education & Scientific ResearchAlgiers, Algeria - Hybrid

An Arabic question-answering system grounded in official government documents.

  • Built an end-to-end Arabic QA system with AraBERT, CAMeL Tools, and FAISS over an estimated 1,200+ official documents.
  • Designed the FastAPI backend and React interface, reaching an estimated sub-two-second average response time across 5+ government data sources.
FastAPIFAISSAraBERTReact
Jul 2025 - Sep 2025AI / Software Engineer InternHolding Algeria Chemical Specialities (ACS - ENAP)Bouira, Algeria - Hybrid

A content platform and retrieval assistant designed for independent business-team operation.

  • Delivered a Next.js 14 and TypeScript company site with SSR and SEO optimization, reaching an estimated Lighthouse score above 90.
  • Integrated Payload CMS and built a LangChain/ChromaDB assistant indexing an estimated 500+ documents.
Next.jsTypeScriptPayload CMSLangChainChromaDB
Sep 2025 - Oct 2025AI / Software Engineer InternMinistry of Vocational Training and EducationAlgiers, Algeria - Hybrid

A national orientation engine matching learner profiles to training and career pathways.

  • Built a Rust-backed NLP recommendation engine matching learner profiles against an estimated 200+ training programs.
  • Added explainability and career-path mapping across an estimated 5+ professional domains.
RustNLPConstraint Filtering
Jul 2025 - Nov 2025Software Engineer & Design Team LeadK2A AutoRemote - Contract

Automotive SaaS product engineering paired with a reusable visual system.

  • Architected and shipped AI-powered features for an automotive SaaS product in Next.js.
  • Established a Figma system spanning an estimated 40+ components to improve design-to-development handoff.
Next.jsApplied AIFigma
Jun 2024 - Aug 2024Artificial Intelligence InternThynk Tech DZAlgiers, Algeria

A classification pipeline integrated into an existing business-critical application.

  • Developed and deployed a Python/scikit-learn classification pipeline processing an estimated 10,000+ records.
  • Reduced manual review time by an estimated 30% within a six-week sprint.
Pythonscikit-learnpandas
03 / Research

Arabic language.
Embedded vision.

Two research tracks, both built around difficult real-world constraints.

01Jan 2026 - Present
6,086sentences · 95.2% character-level IAA

Algerian Dialect Diacritization - Dataset & Modeling

Research Team Leader · ENSIA

Co-leading the first Algerian dialect diacritization corpus: 6,086 sentences with 95.2% character-level inter-annotator agreement, built through a three-phase human annotation pipeline over LLM pre-annotation.

Preparing a paper that benchmarks BiLSTM-CRF, AraBERT, MARBERT, and DziriBERT under MSA/dialect transfer-learning strategies.

022026 - 2027
ViTlatency · memory · energy · accuracy

Optimization of Vision Transformer Models for Embedded Object Detection

Selected Final-Year Research Project · ENSIA × Supervised by Sid-Ahmed Berrani

Investigating optimization strategies for ViT-based object detectors on resource-constrained embedded platforms.

Targeting lower inference latency, memory use, computational cost, and energy consumption while preserving detection performance.

04 / Profile

Engineer.
Researcher.
Community builder.

Final-year B.Sc. Artificial Intelligence Engineering student at ENSIA, expected to graduate in June 2027.

Vice President of the ENSIA Tech Community, after serving as AI Cell Manager and Secretary General. Native in Arabic and Kabyle; professional English and intermediate French.

Leadership / ENSIA Tech Community
Vice PresidentJul 2026 - Present

Supporting club-wide strategy, operations, and coordination across technical and community teams.

AI Cell ManagerJul 2024 - Jul 2026 · 10+ workshops for 30+ members
Secretary GeneralAug 2024 - Jul 2025 · operations for an estimated 400+ member community
Selected recognition
2nd PlaceInnovTech by Djezzy
2nd PlaceJunction X Algiers
2nd PlaceMobAI Hackathon
3rd PlaceDevCamp
3rd PlaceAIFEST'23
#1 in CohortAlgerian Legal GraphRAG
Technical range

Languages

Python · C# / .NET · Rust · TypeScript / JavaScript · Dart / Flutter

Backend & delivery

FastAPI · .NET · REST APIs · PostgreSQL · MongoDB · Docker · Git · GitHub Actions · CI/CD

AI & retrieval

LangChain · LlamaIndex · GraphRAG · Arabic NLP · FAISS · ChromaDB · Qdrant · Hugging Face · NetworkX

Machine learning

scikit-learn · TensorFlow · Sentence Transformers · AraBERT · MARBERT · DziriBERT

Product

React · Next.js · Flutter · Figma · Adobe Illustrator · Prototyping

05 / Contact

Bring me the
hard problem.

Open to backend and AI engineering roles, technical collaborations, and research work.

lyes.hadjar.04@gmail.com