Mobile architecture
Android-first delivery with Kotlin, Compose/XML, Coroutines, Flow, modularization, lifecycle correctness, performance, and production stability.
Senior Mobile Engineer · Kotlin · Android · Product Architecture
Open to senior mobile, full-stack product ownership, remote and sponsorship roles
Senior Mobile & Product Engineer
Building reliable Android products with Kotlin, architecture and backend ownership.
I am Md. Romman Sabbir, a Bangladesh-based engineer with 8+ years of experience across Android, Kotlin, KMP, Spring Boot, Nuxt.js, CI/CD, scalable mobile systems, developer tooling, and products used by millions.
8+Years engineering
4M+Mobile users reached
20M+Infrastructure reach
116+GitHub repositories
Professional focus
Practical engineering depth, built for production teams.
The portfolio now starts like a modern developer site: clear positioning, measurable impact, stack depth, work timeline, product work, open source, writing, and then music as an additional identity.
Backend & product ownership
Spring Boot with Kotlin, REST/GraphQL integration, caching, authentication, MongoDB/Firebase/Parse, Nuxt.js frontend delivery, and shipping end-to-end products.
Developer experience
Open-source libraries, reusable SDKs, CI/CD workflows, code review, technical writing, mentoring, and systems that help other engineers move faster.
Experience
Work experience timeline
Centered vertical timeline using the updated CV experience order and a clean, framework-like layout.
Jun 2021 — Present
Ami Probashi Limited
Assistant Engineering Manager / Lead Android Engineer / Android Engineer · Dhaka, Bangladesh
- Led Android development for applications serving 4M+ mobile users and supporting systems used by over 20M migrant workers globally.
- Architected scalable Android applications using Kotlin, MVVM, and Clean Architecture, improving maintainability and reducing technical debt across multiple releases.
- Designed and implemented CI/CD pipelines using Jenkins and Git workflows, improving deployment reliability and release efficiency.
- Built QR verification and biometric authentication systems deployed across Bangladesh TTC centers and international airports (Dhaka, Chittagong, Sylhet) supporting national migration infrastructure.
- Led engineering practices including TDD adoption, Git workflow standards, and architectural guidelines improving team productivity and code quality.
- Mentored Android engineers and coordinated cross-team collaboration with backend and product teams to deliver high-impact mobile features.
KotlinHiltCoroutinesGraphQLFirebaseJetpackRetrofitJenkinsSamsung KnoxGit
2023 — Present
yLnk
Founder & Product Engineer · Dhaka, Bangladesh
- Architected and developed a scalable link management and analytics platform using Spring Boot, Nuxt.js, and Kotlin.
- Built systems for URL shortening, QR generation, click analytics, campaign tracking, and Link-in-Bio functionality.
- Engineered backend APIs, authentication systems, analytics infrastructure, and production deployment pipelines.
- Leveraged AI-assisted frontend development while independently engineering backend systems and platform architecture.
- Maintained and evolved the platform continuously over 3+ years demonstrating long-term product ownership.
Spring BootNuxt.jsKotlinAnalyticsQR systemsLink-in-BioProduct ownership
Mar 2021 — Jun 2021
Btrac Solutions
Android Engineer · Project: Ami Probashi · Dhaka, Bangladesh
- Developed Android features for the Ami Probashi ecosystem supporting millions of users through secure mobile workflows.
- Integrated REST and GraphQL APIs enabling real-time data synchronization and optimized network performance.
- Collaborated with product managers and backend teams to deliver production features within an Agile development environment.
AndroidREST APIsGraphQLAgileProduction delivery
Dec 2018 — Mar 2021
TBLTechNerds
Software Engineer (Android) · Denver, USA · Remote
- Delivered multiple Android applications from concept to production deployment integrating REST APIs and shared backend systems.
- Worked within a fully remote international engineering team, collaborating across time zones and distributed development environments.
- Managed the full software development lifecycle (SDLC) including planning, development, testing, and release.
- Produced technical documentation improving developer onboarding and long-term maintainability of mobile codebases.
AndroidREST APIsShared backend systemsSDLCRemoteDocumentation
Jan 2018 — Dec 2018
Glitch Studios
Software Engineer (Android) · Dhaka, Bangladesh
- Developed native Android applications using Java, MVP/MVC architecture, SQLite, and Android system components.
- Optimized application performance to ensure reliable operation on low-end Android devices common in emerging markets.
- Improved user experience and responsiveness through UI optimization and efficient background services.
Android SDKJavaMVP/MVCSQLitePerformanceBackground services
Projects
Products that show product and engineering depth
Production-facing work with clear product ownership, platform scale, and reusable developer tooling.
yLnk
Production-grade link, QR, LinkFolio, survey, branded domain, analytics, and customer platform built with Kotlin backend and Nuxt.js frontend.
KotlinSpring BootNuxt.jsMongoDBSEO
Ami Probashi Mobile Platform
Large-scale Android platform for migrant worker services, verification flows, airport/TTC operations, secure onboarding, and production-grade mobile experiences.
AndroidKotlinVerificationBiometricCI/CD
Developer Tooling & SDKs
Open-source Android libraries and SDK contributions focused on networking, caching, animations, pagination, Parse Platform, reusable patterns, and DX.
LibrariesSDKOpen SourceDX
Tech stack
Actual stack, architecture and design patterns
Grouped like a production engineering system: platform, architecture, data, backend, release quality, and leadership.
Kotlin-first mobile engineer with backend and product ownership.
Strongest area: Android platform engineering, scalable architecture, production reliability, cross-functional product delivery, and developer tooling.
AndroidPlatform depth
KotlinPrimary language
BackendSpring Boot
DXSDKs & tools
Mobile platform
KotlinJavaAndroid SDKJetpack ComposeXMLKMPSwiftSwiftUI
Architecture
MVVMMVIMVPMVCClean ArchitectureModular ArchitectureRepositoryUse Case
Design patterns
SOLIDDependency InjectionFactorySingletonObserverStrategyBuilderAdapter
Android internals
Hilt/DaggerCoroutinesFlowRoomDataStoreWorkManagerNavigationLifecycle
Networking & data
RetrofitOkHttpGraphQLREST APIFirebaseParseSQLiteMongoDB
Backend, quality & release
Spring BootJWTCaffeine CacheNuxt.jsTDDCrashlyticsJenkinsGitHub Actions
Open source
Android libraries, SDK contribution & developer tooling
Reusable Android libraries, SDK contribution, and tooling work with visible project branding.
StoreX
Android caching and data storage utility designed around reusable patterns and developer productivity.
KotlinAndroidCaching
NetworkX
Android networking utility library for improving network status handling and integration simplicity.
NetworkingAndroidAPI
AnimationX
Reusable Android animation utilities focused on cleaner UI implementation and smoother motion primitives.
UIAnimationKotlin
LazyLoadingRecyclerView
RecyclerView helper for lazy loading, pagination, and scalable list-based Android experiences.
RecyclerViewPaginationAndroid
Parse SDK for Android
Contributor at Parse Platform SDK for Android and reviewer for Android SDK ecosystem changes.
Parse PlatformSDKReviewer
Earlier Android utilities
FirebaseListener, MapsRouteDrawer, LocationListener, SpeechReader, AddressToLocation, and more Android helper libraries.
FirebaseMapsLocation
Academic
Academic background
Formal education journey across software engineering, computer science, and science-focused academic foundations.
Independent University, Bangladesh (IUB)
M.Sc. in Software Engineering · 2023–2026
Royal University of Dhaka
B.Sc. in Computer Science & Engineering · 2014–2019
Bhawal Badre Alom Govt. College, Gazipur
Higher Secondary Certificate (HSC) · Science · 2014
Konabari M.A Kuddus High School, Gazipur
Secondary School Certificate (SSC) · Science · 2012
Speaking & community
Conference, community and mentoring work
Public speaking, Kotlin/Android community contribution, mentoring, judging, and ecosystem involvement.
DroidCon Bangladesh 2025
Speaker at DroidCon Bangladesh 2025, contributing to the Android engineering community.
Kotlin Adda
Community contribution around Kotlin, Android engineering, and developer knowledge sharing.
CloudCamp Bangladesh 2026
Mentor and judge for The Infinity AI BuildFest 2026 by CloudCamp Bangladesh, supporting builders and technical participants.
Awards & early recognition
Early achievement and leadership recognition
Academic, science-focused, and early technology leadership recognition from school and college years.
Winner · Creative Talent Hunt (Medha Onneshon)
Mathematics & Computer · Gazipur District Level · 2013
Winner · Science Fair Project Showcase
Gazipur District Level · Bhawal Badre Alom Govt. College · 2014
Computer Club Leadership
Early recognition · School Computer Club · Konabari M.A Kuddus High School
Writing
Engineering blogs & technical writing
Technical notes around Android, Kotlin, architecture, backend, performance, caching, and developer experience.
Hashnode Blog
Primary technical blog hosted on rommansabbir.com with Android, Kotlin, backend, architecture, and engineering notes.
Medium
Technical writing archive and professional posts on Medium.
Additional creative work
Music career
Placed near the bottom so the portfolio stays professional-first while still showing the creative identity and streaming catalog.
Artist links
Streaming profiles with platform icons loaded from each official website favicon.
Amazon MusicTop songs
Linked from public music pages surfaced through Google search results.
Contact
Need a senior mobile/product engineer?
Available for senior Android, mobile lead, full-stack product engineering, technical leadership, remote and sponsorship-aligned opportunities.