👋 Hello, I'm Romman Sabbir

Senior Mobile & Product Engineer specializing in Android, Kotlin, scalable mobile architecture, backend ownership, and production-grade product engineering.

I’m a Bangladesh-based engineer with 8+ years of experience building Android, mobile, backend, and developer tooling systems used by millions. My work focuses on reliable mobile products, clean architecture, scalable systems, open-source libraries, and end-to-end product delivery.

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🚀 What I Do

📱 Mobile Engineering

• Android development with Kotlin, Java, Jetpack Compose, XML, Android SDK
• iOS development with Swift, SwiftUI
• Kotlin Multiplatform interest and cross-platform product thinking
• Production stability, performance, lifecycle correctness, background work, and scalable UI architecture

🏗️ Architecture & Product Engineering

• MVVM, MVI, Clean Architecture, Modular Architecture
• SOLID principles, dependency injection, repository/use-case patterns
• Large-scale mobile systems, developer tooling, reusable SDKs, and maintainable codebases
• Product ownership from idea → architecture → development → deployment

⚙️ Backend & Platform

• Kotlin, Spring Boot, REST APIs, GraphQL, JWT, Caffeine Cache
• Firebase, Parse Platform, MongoDB, SQLite
• CI/CD with Jenkins, GitHub Actions, Git workflows
• Full-stack product delivery with backend APIs and frontend integration

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🌍 Impact

• 8+ years in software engineering
• 4M+ mobile users reached through production Android platforms
• 20M+ infrastructure reach through national-scale migration-related systems
• 116+ GitHub repositories
• Founder & Product Engineer of yLnk
• Open-source contributor and technical writer

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🧩 Featured Work

🔗 yLnk

A production-grade link management, QR, LinkFolio, survey, branded domain, analytics, and customer platform built with Kotlin/Spring Boot and Nuxt.js.

📲 Ami Probashi Mobile Platform

Large-scale Android platform supporting migrant worker services, secure onboarding, verification workflows, airport/TTC operations, and production-grade mobile experiences.

🛠️ Developer Tooling & Open Source

Reusable Android libraries and SDK contributions focused on caching, networking, animations, pagination, Parse Platform, reusable patterns, and developer experience.

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✍️ Writing & Community

I write technical articles about Android, Kotlin, architecture, backend systems, caching, performance, and developer experience.

I’m also involved in the developer community through speaking, mentoring, open-source contribution, and technical knowledge sharing.

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🧠 Tech Stack

val romman = engineer {
    role = "Senior Mobile & Product Engineer"
    primary = listOf("Kotlin", "Android", "Jetpack Compose", "Spring Boot")
    mobile = listOf("Android SDK", "Java", "Swift", "SwiftUI", "KMP")
    backend = listOf("Spring Boot", "REST API", "GraphQL", "Firebase", "Parse", "MongoDB")
    architecture = listOf("MVVM", "MVI", "Clean Architecture", "Modular Architecture")
    tools = listOf("Git", "Jenkins", "GitHub Actions", "Android Studio", "IntelliJ IDEA", "Xcode")
    focus = listOf("Scalable Systems", "Product Ownership", "Developer Experience")
}

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🤝 Let's Connect

I’m open to senior mobile engineering, Android lead, full-stack product engineering, technical leadership, remote, and sponsorship-aligned opportunities.

📧 Email: rommansabbir@gmail.com 🌐 Portfolio: https://portfolio.rommansabbir.com 📝 Blog: https://rommansabbir.com 🔗 LinkedIn: https://www.linkedin.com/in/rommansabbir 💻 GitHub: https://github.com/rommansabbir