Abhishek Tyagi, Android Developer in Gurugram, Haryana, India
Abhishek Tyagi

Android Developer in Gurugram, Haryana, India

Member since October 11, 2018
Abhishek has been doing Android development since 2014, is an entrepreneur, and understands the importance of proactivity and results. He has contributed to apps with more than five million downloads and worked with startups where he was the sole developer and leading a team of developers for big companies. Abhishek is an extremely detail-oriented person and goes the extra mile to make beautiful apps.
Abhishek is now available for hire

Portfolio

  • Uber
    Dagger 2, RxJava 2, Java, Kotlin, Android, Go
  • Times Internet
    Swift, iOS, RxJava, Kotlin, Java, Android
  • OrangeTwig
    Node.js, Swift, iOS, Java, Android

Experience

Location

Gurugram, Haryana, India

Availability

Part-time

Preferred Environment

Git, Android Studio, MacOS

The most amazing...

...task I did was integrating UberPay APIs in the Uber payment framework. This allowed removing eng dependency in adding new payment providers to Uber apps.

Employment

  • SDE 3

    2019 - 2022
    Uber
    • Migrated Uber Push infrastructure from SSE (Server-Sent Events) to gRPC.
    • Integrated UberPay APIs in the payment framework, which allows any third-party payment provider to add its payment method in Uber apps instead of developers implementing each provider. This resulted in a saving of around 430 eng. workweek per year.
    • Developed Uber Prescriptions, a new vertical in Uber itself to deliver prescriptions to users in the US.
    • Worked on the UberPay payment methods, which unlocked $50M gross booking in just three months of launch.
    • Created a new multistep checkout experience for the Uber Eats app.
    Technologies: Dagger 2, RxJava 2, Java, Kotlin, Android, Go
  • Senior Full-stack Mobile Developer

    2016 - 2019
    Times Internet
    • Developed the “Investment” section of the ETMoney app in both Android as well as iOS. It lets you buy mutual funds directly from the app without any paperwork.
    • Developed a new quick solution feature that quickly lets you invest in pre-selected funds.
    • Implemented RxJava support which improved app data flow in-app and made it more reactive.
    • Implemented MVVM with clean architecture which completely decouples logic from UI and greatly improves unit testing and maintaining codebase.
    • Implemented KYC (know-your-customer) flow completely inside the app without any paperwork. We were the first ones to shift this process completely online.
    • Implemented PDF parsing which can parse PDF provided by your mutual fund distributor and add all your outside investments in one tap.
    • Built a stock module that would let users invest in the stock market right from the app.
    • Reworked most of the app's code base to minimize lag on the user's device.
    Technologies: Swift, iOS, RxJava, Kotlin, Java, Android
  • Full-stack Developer

    2015 - 2016
    OrangeTwig
    • Developed OrangeTwig's Android and iOS app from scratch.
    • Rewrote the image fitting algorithm of Orangetwig for much better performance.
    • Developed a new feature, “Autoplan,” from scratch which automatically posts on your social media account.
    • Added two new platforms, WooCommerce and BigCommerce, to OrangeTwig's web app.
    Technologies: Node.js, Swift, iOS, Java, Android

Experience

  • ETMONEY: Direct Mutual Funds, Credit, and Expenses
    https://play.google.com/store/apps/details?id=com.smartspends

    It is an Android app. The app lets you buy mutual funds in India. The app has more than 5 million downloads in the Google Play Store. It has a lot more features, but I've only built the investment part of this app.

  • ETMONEY: Investments and Credit
    https://apps.apple.com/in/app/etmoney-mutual-funds-sip-fd/id1212752482

    This is an iOS app. It lets you invest in mutual funds in India. I built the app's investment section and led a team of three other developers when we started building the iOS version. The app follows MVVM architecture.

  • Peace of Mind (iOS)

    This app is built mostly for personal use. It lets you create a circle of family or friends to know their whereabouts.

    Some other features of the app:
    - Any member can see the real-time location of any member in the circle.
    - Receive real-time alerts when Circle Members arrive at or leave destinations
    - Implemented the whole app using Swift, Firebase, RxSwift, Realm, and MVVM with Clean architecture
    - Unit testing using XCTest framework
    - The back-end is written in Node.js and deployed on Google Cloud Platform

  • Peace of Mind (Android)
    https://play.google.com/store/apps/details?id=com.peaceofmind.familylocator

    This app is built mostly for personal use. It lets you create a circle of family or friends to know their whereabouts.

    Some other features of the app:
    - Any member can see the real-time location of any member in the circle.
    - Receive real-time alerts when Circle Members arrive at or leave destinations
    - Implemented the whole app using Kotlin, Firebase, RxJava 2, Room, and MVVM with a clean architecture.
    - Used Dagger 2 for dependency injection.
    - The back-end is written in Node.js and deployed on Google Cloud platform.

  • Fivestars Pay

    Built Fivestars Pay app which is a payment solution for POS (point of sale) systems - Square, Clover, and Toast.

    Technology: Kotlin, RxJava, Dagger 2, Accessibility API

  • Impulse Music Player
    https://play.google.com/store/apps/details?id=com.appmetric.impulse.free

    It is a gesture-controlled music player for Android. It has some of the most advanced features of any music player on Android
    - Gapless playback
    - Crossfade
    - 5-band equalizer
    - Handwave feature which lets you skip songs just by waving your hand above your phone

    The app is completely written in Kotlin using MVVM with a clean architecture.

    WIP: I'm currently working on allowing an option to stream Youtube video of the current playing song.

    The free version has around 85,000 downloads with a rating of 4.3 and the paid version has around 5,000 downloads with a rating of 4.5.

  • OrangeTwig

    I built the iOS as well as Android app for OrangeTwig. The app handles scheduling marketing posts on the social media accounts of businesses.

  • Better Android Apps Using MVVM With Clean Architecture (Publication)
    Keeping your Android codebase maintainable as your codebase grows can be a challenge. In this article, Toptal Freelance Android Developer Abhishek Tyagi shows how to combine MVVM with Clean Architecture—the latter as described by Robert C. Martin—to write decoupled, testable, and maintainable code.

Skills

  • Languages

    Kotlin, Swift, Java, Go
  • Libraries/APIs

    RxJava 2, Node.js, RxJava
  • Tools

    Git, Android Studio
  • Paradigms

    Model View Viewmodel (MVVM), Clean Architecture, Model View Presenter (MVP)
  • Platforms

    iOS, Android, MacOS
  • Other

    Room, Mobile App Development, Computer Science
  • Frameworks

    Dagger 2
  • Storage

    MySQL, Realm, PostgreSQL, MongoDB

Education

  • Bachelor's Degree in Computer Science
    2011 - 2015
    Indian Institute of Technology Roorkee - Roorkee, India

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