I am searching here for an exceptional developer for JAVA for our not yet launched Android app. We programmed a Group chat app (with story function), which runs ok, but has the following issues:

- warm up lag when re waking or starting app

- sometimes scrolling lags

- connection takes pretty long

- delay when closing chats (hitting back button)

- delay when opening chats

- TEST THE APP UNDER LOAD (thousands of messages and groups) and make it perform with 60fps

I want a world class developer, who can bring this app to a complete new level by questioning:

- how can we get the butter smooth feeling Telegram has?

- do we need this many API call?

- do we use XMPP in the most appropriate way?

- what can we improve to make it ultra fast?


Current team:

1 dev for Android, 1 dev for iOS, 1 additional expert for iOS, 1 additional expert for iOS and Android (10y experience), backend dev if needed


AWS, openfire.

We dont use any chat APK

Many more tasks to come for this dev :-), ongoing project.

Skills: Android, Java, Mobile App Development

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About the Employer:
( 5 reviews ) BALIK PULAU, Malaysia

Project ID: #28379536

Awarded to:

(17 Reviews)

7 freelancers are bidding on average $1307 for this job


SENIOR ANDROID APP DEVELOPER WITH 6+ YEARS EXPERIENCE: Hello, I will surely help you with your Android app. I have read your requirements and It's something that I can turn around. I am expert in Core Java, OOPS, And More

$2000 USD in 30 days
(66 Reviews)

Hi, I have 8+ years in developing Android, iPhone and Ipad apps. My skills include Android SDK, OpenGL ES, Cocoa Framework, XCode, iPhone SDK, Cocos2D, Master Databases (MySQL; SQLite), Geolocation (MapKit), PhoneGap More

$1000 USD in 10 days
(5 Reviews)

Hi Dear, I read your description carefully. I understood what you require me to do and I am filled with confidence that I can complete your project wonderfully. I have experience over 5+ years with Java/JavaFX/JavaSwin More

$1200 USD in 4 days
(1 Review)

########### Java Expert ########### Hi. Nice to meet you. I have read your description carefully. I think we can assist together. I will make good result and satisfy you. Dear regards.

$1200 USD in 5 days
(2 Reviews)

Hello!, I am Kofi Ohemeng. I hope you are staying safe, sheltered in place, stocked with toilet paper, and healthy during these absolutely unprecedented, wild, chaotic, terrifying times. I have read your job (JAVA-prog More

$1000 USD in 7 days
(0 Reviews)

Hi, I have gone through your project description and I understand the whole statement of work clearly. I have some questions to ask but I would like to discuss them on Chat! Please check [login to view URL] More

$1250 USD in 7 days
(1 Review)