Libardo Ramirez

Backend Developer & Security Engineer

I build secure, scalable backend systems and polished native Apple apps.

About

Hi, I’m Libardo. I build backend architecture, iOS & macOS apps, and secure systems that power global products across Europe, Asia, and Latin America.

I specialize in Python backends — FastAPI and Django microservices deployed with security-first pipelines on AWS and GCP — and I’m ISC² certified in cybersecurity, so systems I design are resilient from the ground up: threat modeling, secure code review, and vulnerability assessment baked into the process.

On the side, I ship native Apple apps with SwiftUI, from an AI research workspace that runs 100% on-device to a multi-stream AirPlay receiver for macOS. Privacy-first by design, App Store published.

20+ Years experience
ISC² Certified cybersecurity

Technologies I work with: Python · FastAPI · Django · Swift/SwiftUI · PHP · PostgreSQL · MongoDB · Docker · Kubernetes · AWS · GCP · Redis · OpenAI SDK · Ollama · MLX

Featured Projects

  • EQBook AI research workspace interface

    EQBook

    A NotebookLM-style AI workspace that runs 100% on your device. Add PDFs, documents, audio and video — then ask questions and get cited answers powered by locally-run Gemma models. No cloud. No accounts. Your data never leaves your Mac.

    • macOS
    • AI
    • Privacy-First
    • On-Device
  • AirCapture macOS app interface

    AirCapture

    Multi-stream AirPlay receiver for macOS. Monitor multiple screens simultaneously using the standard AirPlay protocol — unlimited streams, adaptive grid view, MP4 recording, and PIN protection. Built for developers, teachers, IT administrators, and QA teams.

    • macOS
    • Swift
    • Open Source
    • GPL
  • EarnScreen iOS app interface

    EarnScreen

    Earn your screen time through real-world habits. Blocks distracting apps by default and unlocks them by completing healthy quests like walking, meditating, or studying. Motion-verified activities and 100% on-device privacy.

    • iOS
    • Swift
    • Privacy-First
  • DialogueMap live discussion map interface

    DialogueMap

    A collaborative discussion tool for classrooms, coaching sessions, and facilitation rooms. Tap as people speak, watch the map evolve in real time, and review participation patterns with exports and replayable session insights.

    • iPad
    • Swift
    • Facilitation
  • Bedtime Snuggles iOS app interface

    Bedtime Snuggles

    Innovative children’s app leveraging Apple Intelligence to create personalized bedtime stories. Privacy-first design with no data collection or cloud storage.

    • iOS
    • AI
    • Privacy-First
  • Timer Of Time iOS app interface

    Timer Of Time

    Elegant timer application with smart notifications and flexible pause/resume functionality. Helps users manage time effectively with estimated finish times for better planning.

    • iOS
    • Swift
    • UIKit
View the full project archive

Publications

  1. Apr 2026 · 10 min

    Building a Fully Local RAG System with Qdrant and Ollama

    • #ai
    • #llm
    • #rag
  2. Feb 2026 · 5 min read

    From Python ML to Swift: Translating MicroGPT

    • #swift
    • #python
    • #machinelearning
  3. Feb 2026 · 3 min read

    Building EarnScreen: Turning Screen Time from Waiting Game into Opportunity

    • #swift
    • #ios
    • #digitalwellbeing
  4. Nov 2025 · 4 min read

    From Pandas in Python to TabularData in Swift for Data Exploration

    • #swift
    • #pandas
    • #datascience
  5. Sep 2025 · 5 min read

    Building a Bedtime Stories App with Apple’s Foundation Models

    • #swift
    • #ai
    • #appleintelligence
View all on Dev.to

What’s Next?

Get In Touch

I’m currently open to new opportunities — contract, consulting, or full-time — available remotely. Whether you have a question, a project, or just want to say hi, my inbox is always open.

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