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William ElimbiWE

William Elimbi

Expert AI Locale & RAG Self-Hosted | Bun.js / Rust

€650/day
Paris, FR
8-15 years

Average response time: 1 hour

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About William

I am a senior full-stack developer specializing in 100% self-hosted, privacy-first local AI solutions. By 2026, companies and creators will increasingly reject OpenAI/Groq/Anthropic APIs due to costs, data leaks, and GDPR. I build high-performance RAG (Retrieval-Augmented Generation) systems for them, deployed on their own servers/VPS, without any external cloud dependency.
My core strengths:

Self-hosted RAG: document/PDF/website ingestion, local vector DB (Chroma/Qdrant/FAISS), efficient retrieval + generation with open models (Llama 3.1/Phi-3/Mistral/Nemotron via Ollama or llama.cpp). One-click Docker Compose deployment, Bun.js for ultra-fast backend.
→ Concrete example: GitHub repo with full local RAG in Bun.js (scrap + chat interface) → github.com/sepiropht/[your-rag-repo]
Video subtitle automation: Whisper pipeline + post-processing (FR/EN correction, precise timing, SRT overlay → MP4). Ideal for YouTube, podcasts, training, Reels/TikTok. Batch or one-shot processing, optimized performance on GPU/CPU.
→ Demo repo: github.com/sepiropht/auto-subtitles (Whisper + ffmpeg/Bun)
Custom Rust/Bun tools: High-performance CLIs, respectful scrapers, Rust Git-like implementations (rgit), Node → Bun migrations for 2-3x speed. OVHcloud production experience (cloud/DevOps).
Full-stack: React/Next.js frontend if needed, REST/GraphQL APIs, secure auth.

Why me?

Full-time availability.
Pragmatic approach: I deliver clean, testable, documented code, with Docker + basic CI/CD included.

Realistic freelance rate 2026: €550–€700 HT / day (adjustable for short missions or packages). Typical missions: 3–15 days for an MVP/RAG, or longer for full integration.
  • French

    Native or bilingual

  • English

    Conversational

Can work on-site
Paris (up to 50km), Versailles (up to 10km)

Experience

  • OVHcloud
    Full Stack Developer
    TECH
    January 2024 - September 2025 (1 year and 8 months)
    Paris, France
    • Development of plugins and services for internal platforms with React.js and Node.js
    • Daily collaboration with DevOps, SRE, and operations teams (multidisciplinary squad)
    • Industrialization: Creation of reusable templates and platform models
    • Advanced CI/CD: Jenkins pipelines, automated deployments via Ansible
    • Innovative POCs: Industrial solutions ensuring quality and scalability
    • UX Improvement: Focus on the user experience of internal tools
    Node.js React.js DevOps JavaScript Vue.js
  • Westfield
    Full Stack Developer
    REAL ESTATE
    January 2022 - December 2023 (1 year and 11 months)
    Paris, France
    Microservices and scalable API architecture
    • Development of React.js interfaces and REST APIs with Node.js/NestJS
    • Major technical migration: CoffeeScript to TypeScript/NestJS
    • Complete setup of CI/CD pipelines (Jenkins) with Docker containerization
    • International collaboration (USA/India) - Multidisciplinary teams
    • E2E tests with Jest and Pactum to ensure robustness
    AWS AWS Lambda NestJs Next.js Prisma ORM
  • Mention
    Full Stack Developer
    SOCIAL NETWORKS
    January 2021 - December 2021 (11 months)
    Paris, France
    Development Platform
    • Development of SaaS features with React.js and Node.js
    • GraphQL integration for front/back communication optimization
    • Technical mentoring and team skill development
    • Agile methodology, systematic code reviews
    GraphQL Node.js React.js Jest Parsing

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Education

  • Associate's Degree
    3W Academy
    2015
    Formation sur la stack web, javascript html et css
  • Master of Science in Systems and Network Administration
    OpenClassRoom
    2024

Skill set (12)

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