Sundram Singh – Senior Android Developer

Summary

Senior Android Developer with 6+ years of experience designing, building, and delivering high-performance, scalable, and maintainable native Android applications in Kotlin and Java. Proven track record of leading feature initiatives, driving architectural decisions using MVVM-Clean and clean architecture principles, and championing code quality through peer code reviews and thorough testing with JUnit and Espresso. Experienced in Agile and Scrum environments — active in sprint planning, retrospectives, and cross-functional collaboration with product, design, QA, and engineering teams. Delivered eCommerce solutions for 70+ clients on Shopify and Magento platforms, including real-time apps with 1M+ downloads. Proficient in REST API and GraphQL integrations, Firebase, Android Jetpack, Hilt dependency injection, Coroutines, and third-party SDK onboarding.

Technical Skills

Languages: Kotlin (3+ years), Java (4+ years), JavaScript

Architecture: MVVM, MVVM-Clean, Clean Architecture, MVC

Android Jetpack: ViewModel, LiveData, Room, WorkManager, Data Binding, ViewBinding, RecyclerView, ViewPager2, Fragment, ExoPlayer (Media3)

UI Development: XML Layouts, Material Design, ConstraintLayout, ViewBinding, Data Binding

Dependency Injection: Hilt, Dagger 2, Koin

Networking: Retrofit 2, REST API, GraphQL, Volley, OkHttp

Testing: JUnit, Espresso, Unit Testing, Instrumentation Testing

Firebase: Analytics, Cloud Messaging, Push Notifications, Crashlytics

Tools & Build: Android Studio, Gradle, GitHub Actions (CI/CD), Git, GitHub, Bitbucket

AI Tools: Claude Code, GitHub Copilot, ChatGPT, Google Gemini, Cursor (AI-assisted development)

Methodologies: Agile, Scrum, Sprint Planning, Code Review, Technical Documentation

Other: Shopify Mobile Buy SDK, Algolia SDK, Glide, Coroutines, JSON

Work Experience

CEDCOSS Technologies Private Limited Aug 2021 – Present

Senior Android Developer

Led design and development of 70+ high-performance native Android eCommerce apps across Shopify and Magento platforms using Kotlin, Java, MVVM-Clean architecture, and clean architecture principles.
Drove architectural decisions for scalable, maintainable, and secure Android applications — defining feature implementation plans and communicating them to cross-functional teams.
Conducted peer code reviews, enforced coding standards, and championed clean, extensible, and testable code practices across the engineering team.
Actively participated in Agile/Scrum ceremonies including sprint planning, retrospectives, and daily stand-ups; provided high-level estimates at project inception and ensured tasks were delivered within sprint timelines.
Integrated Shopify Mobile Buy SDK via GraphQL — implemented Cursor Pagination, Shopify Filters, and Subscription products using ViewModel, LiveData, and Coroutines.
Built dynamic homepage configuration system using MVVM-Clean and Hilt dependency injection, enabling no-code UI customisation for 20+ Shopify clients.
Integrated payment gateways (PayTm, CCAvenue, RazorPay, Tamara, Tabb) and third-party SDKs (Algolia, Weglot, Flits, Judge.me) across 50+ Magento client apps.
Implemented social login (Facebook, Google), Firebase Analytics, Facebook Pixel events, and Firebase Cloud Messaging push notifications.
Created and maintained accurate technical documentation for features, APIs, and integration patterns used by the team.
Identified opportunities for automation using GitHub Actions CI/CD pipelines to streamline build, test, and deployment workflows across client projects.

QBEAK EDU-Solutions Pvt Limited Sep 2020 – Jul 2021

Android Developer

Developed and maintained Android modules for a real-time edu-tech platform using Kotlin, ViewModel, LiveData, and RecyclerView with XML-based UI layouts.
Wrote unit tests using JUnit and instrumentation tests using Espresso to ensure feature correctness and high test coverage.
Integrated Firebase Cloud Messaging for real-time push notifications and Firebase Analytics for user engagement tracking.
Collaborated with Spring Boot backend team in an Agile environment to design and consume REST APIs using Retrofit and Volley.
Contributed to microservices development with JDBC and Hibernate backend integrations.

Uwonder Feb 2020 – Jul 2020

Android Developer

Built Android application features using Volley for networking, Glide for image loading, and XML layouts with ViewBinding for efficient view management.
Implemented Firebase push notifications and real-time event tracking to improve user engagement metrics.
Supported backend team on microservices using Spring Boot, JDBC, and Hibernate to maintain mobile-facing REST APIs.

Pacex-e-System Pvt Ltd Sep 2019 – Jan 2020

Technical Consultant

Evaluated and prototyped mobile solutions using Cordova, Java, Python, and native Android to support client technology recommendations.
Assessed Android Jetpack components and REST API integration patterns for client project feasibility reports.

Projects

HomeRun – Materials in 60 mins 100K+ Downloads · 4.5-Star Rating · Google Play

Tech: Kotlin, Java, MVVM, Android Jetpack, Retrofit 2, Firebase Crashlytics, Material Design, XML

High-performance on-demand construction materials delivery app (Bangalore) with real-time order tracking, 60-minute delivery promise, and a catalogue spanning cement, tiles, paint, plumbing, and electrical supplies.

Reduced app launch time from 7s to 1.5s (78% improvement) through startup optimisation and lazy loading.
Improved app stability from 70% to 99.85% by identifying and resolving crash sources via Firebase Crashlytics.

MageNative – Shopify & Magento Platform 70+ Clients · eCommerce

Tech: Kotlin, Java, MVVM-Clean, Android Jetpack, Hilt, Retrofit 2, GraphQL, Shopify Mobile Buy SDK, Algolia SDK, REST API, XML

Led architecture and delivery of a white-label Android eCommerce platform serving 70+ global clients. Shopify: dynamic homepage, Shopify Filters, Cursor Pagination, Subscription products, social login. Magento: Algolia search, dynamic homepage, rental and bulk-quote add-ons, multi-gateway payment integrations.

Pronted 360 1,200+ Downloads · 4.9-Star Rating · Google Play

Tech: Kotlin, Android Jetpack, Firebase, REST API, Material Design, XML

Institution management platform streamlining operations and parent engagement for educational institutions. Achieved the highest Play Store rating (4.9 stars) in the portfolio.

HBO – Health By Organics 1M+ Downloads · 4.6-Star Rating

Tech: Kotlin, MVVM, Android Jetpack, Retrofit 2, Firebase, Material Design, XML

Organic products marketplace connecting users with certified organic vendors. One of the highest-download apps in the health & organic niche on the Play Store, sustaining a 4.6-star rating at scale.

Alsheta & Alsaif 10K+ Downloads · Google Play

Tech: Kotlin, Android Jetpack, Algolia SDK, Tabby, Tamara, PayFort, XML

Fully customised eCommerce app with advanced payment gateways (Tabby, Tamara, PayFort) and Algolia search for a seamless purchase journey.

Education

Bachelor of Technology (B.Tech)

Bansal Institute of Engineering and Technology, Lucknow

2019 · 73.42%