P i e r r e

My Expertise

What I Offer

Frontend Development

Frontend Development

Building responsive, user-centric interfaces using modern frameworks and libraries.

  • ReactJS, Redux, TypeScript
  • Material UI, Tailwind CSS, Bootstrap
  • Next.js, Chart.js, ECharts
Frontend Development
Backend Development

Backend Development

Developing secure, scalable, and high-performing backend services with API integration.

  • Node.js, Express.js, NestJS
  • REST APIs & WebSockets
  • Databases: PostgreSQL, MongoDB, MySQL, Redis
Backend Development
Cloud & DevOps

Cloud & DevOps

Deploying applications on cloud platforms with modern CI/CD practices.

  • AWS (EC2, S3, Lambda)
  • Docker, Jenkins, GitHub Actions
  • Netlify & Vercel Deployments
Cloud & DevOps

About Me

Welcome to My Portfolio

Hi there, I’m Pierre Ricardin Guirand, a passionate Kotlin Android Developer with 3+ years of experience designing, building, and optimizing modern Android applications. I specialize in Jetpack Compose UI, Kotlin Coroutines and Flow, MVVM architecture with Hilt, data persistence with Room/DataStore, and robust API integrations using Retrofit and OkHttp. I work extensively with Firebase (Firestore, FCM, Crashlytics, Analytics) and automate releases via Jenkins and Firebase App Distribution. I thrive in Agile teams, delivering secure, maintainable, and user‑friendly mobile experiences.

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My Skills

Android Technical Skills

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Kotlin / Jetpack Compose

95%

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Android SDK / MVVM

90%

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Retrofit / OkHttp / Coroutines

85%

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Firebase (Firestore, FCM, Crashlytics)

80%

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CI/CD (Jenkins, App Distribution)

75%

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Testing (JUnit, Espresso, Mockk)

85%

Android Development

Jetpack Compose

Firebase & Analytics

Performance Optimization

Agile & DevOps

CI/CD Pipelines

Testing (JUnit, Espresso)

Bluetooth & Background Work

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My Android Career and Education

  • Feb 2024 – Present
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    Android Developer

    American Airlines — Dallas, TX

    Modernized the American Airlines mobile app using Jetpack Compose and Kotlin best practices. Implemented new booking and loyalty modules, integrated Kotlin Coroutines and StateFlow for real-time updates, and collaborated with UI/UX, QA, and DevOps to ship reliable, performance‑tuned features.

  • Apr 2019 – Aug 2022
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    Software Engineer

    Consulting Projects

    Migrated XML layouts to Jetpack Compose, integrated Retrofit with OkHttp interceptors for secure API communication, configured Firebase services (Firestore, Crashlytics, FCM, Analytics), and automated build/test with Jenkins and Firebase App Distribution. Focused on startup time, background work with WorkManager, and robust JUnit/Espresso test coverage.

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    Master’s in Network & IT System Engineering

    University Picardie Jules Verne

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    Networking, systems engineering, and scalable software delivery for enterprise environments.

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    Master’s in Computer Engineering

    ESIH

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    Software engineering, distributed systems, and applied development practices.

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    Bachelor’s in Computer Science

    ESIH

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    Foundations in algorithms, data structures, and object‑oriented programming.

Character Traits

Who I Am as a Professional

Problem Solver

Skilled at analyzing complex technical challenges and delivering efficient, scalable solutions across frontend and backend systems.

Collaborative

Experienced in Agile/Scrum environments, working closely with cross-functional teams to align business goals with technical execution.

Tech-Savvy

Proficient in modern frameworks, cloud platforms, and DevOps practices, always staying up-to-date with evolving technologies.

Performance Driven

Focused on building high-performance applications that optimize speed, security, and user experience for fintech and tech industries.

Detail Oriented

Ensures code quality through unit testing, responsive design, and cross-browser compatibility, delivering polished solutions.

Lifelong Learner

Continuously improving skills through hands-on projects, advanced education, and adapting to new technologies and best practices.

Portfolio

My Recent Works

View All Projects
Fintech Dashboard
Full Stack Development, 2024

Fintech Dashboard & Real-Time Transactions

Authentication System
Backend Development, 2024

Secure Authentication with JWT & OAuth

AWS CI/CD Deployment
Cloud & DevOps, 2023

AWS Deployment with CI/CD Pipelines

Visualization Dashboard
Frontend Development, 2022

Real-Time Visualization Dashboard

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Hello👋 I'm available for Android freelance & full-time roles

Hire me now
  • Available for work - 40 Hours / Weekly
  • Active Status - Active

Let’s work together!