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I need a back end developer for a chat application

I need someone with a deep understanding of WhatsApp's logic. I have made a chat application like whatsapp. Some key features include:

1. Phonebook integration. - All registered users that are on my phonebook will show as contacts on my app.

2. Works offline and does not store messages/media on our server side. Messages/media are stored on the user's phones.

3. has all the bells and whistles whatsapp does except for voice and video calls.

I've tried to implement these features, however I am experiencing trouble such as:

1. Some of the registered users are not showing up on my app

2. Chats don't perform very well, they take forever to send and be received. And I have problems using the same 'storing on the phone' logic whatsapp uses.

Habilidades: Android, Mobile App Development, iPhone, PHP, Java

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Acerca do Empregador:
( 0 comentários ) Jakarta, Indonesia

ID do Projeto: #20331990

112 freelancers estão ofertando em média $4032 para esse trabalho

EliteSolution8

Hello I read your description and can know that you'd like to build a messenger app similar to WhatsApp. As a senior developer who has good experience in mobile app development, I'd like to help you with this project. Mais

$4000 USD in 45 dias
(62 Comentários)
9.0
codeguru786

Hi, I've read the project description and definitely can update the mobile app like WhatsApp. I'll provide you with the highly-skilled & professional UI/UX/HTML5, Java, PHP, Swift, React, JavaScript, MySQL, front & bac Mais

$5000 USD in 30 dias
(430 Comentários)
9.2
Webwingtechology

Warm Wishes, We found that you have a requirement. Well, we are a sophisticated team in establishing Chat Application projects and we also have a list of happy customers working with us. We are keen to serve you with o Mais

$4500 USD in 35 dias
(173 Comentários)
9.0
nuked24

Hello, please do check our message so that we can talk and discuss more about the project. Please provide all requirements of the [login to view URL] provide any reference APP like that you want your APP. After that we can di Mais

$3000 USD in 7 dias
(177 Comentários)
8.7
BlueGenie95

Excellent Developers here. We have read the project description fix the trouble shooting error in the whats app like chat app .We are interested to work for your [login to view URL] have the well experienced team of develo Mais

$4000 USD in 7 dias
(262 Comentários)
8.7
r4rony

__ Awaiting your response __ Hello, SIMILAR WORK DONE - [login to view URL] - [login to view URL] • http:// Mais

$3000 USD in 40 dias
(190 Comentários)
8.5
gkws

Dear Employer, This is OM from Risensys Pvt Ltd. We are giving quality services from past 8 years. Can you come over to chat to discuss further in this regards as I would love to hear more about the idea/ concept? * Mais

$3000 USD in 30 dias
(390 Comentários)
8.4
netdevbiz

Greetings !!! We have gone through your brief carefully and understood that you have already developed a chat application like WhatsApp, but you are experiencing some troubles while implementing the following features Mais

$3000 USD in 30 dias
(180 Comentários)
8.6
sphinxsolution

Hello, We are Sphinx Solutions, a CMMI Level 3 appraised company. We are a rapidly growing software and mobile app development company. We create beautiful, innovative and productive websites, apps, web app for entrep Mais

$4000 USD in 30 dias
(90 Comentários)
8.6
taskmanageryd

Hi, I have more than 10+ years experience in Android and IOS apps development with backend and UI/UX design… Will take care about API, UI design, apps development and long term maintenance. Native Android and IOS ap Mais

$4000 USD in 40 dias
(509 Comentários)
9.0
vasundhara19

Respected Sir / Ma'am, I have gone through your post and you are looking for a back end developer for a chat application, We have the experienced team of Developer can do this project, Can you please take an initiative Mais

$3350 USD in 50 dias
(119 Comentários)
8.3
trivediinfo

Hello I have seen your project and I'm interested in working with you. I guarantee you the best performance, on time project delivery, faster communication and quick response to your queries. I will provide you very u Mais

$3000 USD in 30 dias
(312 Comentários)
8.3
xiaomingming

Let me help you solve issues. I have rich experiences with chat app, whats app clone. I want to chat with you for details. thanks and regards.

$3000 USD in 30 dias
(108 Comentários)
8.0
peng72083

Hello, How are you? Your project is very similar with my previous work. I specialize the website and mobile app development and I have experiences to build chat app. I can provide you good result you want. Hope to dis Mais

$4000 USD in 7 dias
(68 Comentários)
8.0
tarunmehan

SENIOR IPHONE/ANDROID APP DEVELOPER WITH 5+ YEARS EXPERIENCE: Hello, Greetings for the day! I am a full-stack developer and will surely help you to work on backend tasks. I have read your requirements and It' Mais

$3000 USD in 30 dias
(107 Comentários)
8.1
searchtechnow

We can incorporate the features that you need just like watt's app. We have already created a chat application having the same functionality and can share that with you, so that you can have a look to it. Please chec Mais

$5000 USD in 45 dias
(389 Comentários)
8.3
maysaxena

Hi there, I AM READY TO START YOUR WORK RIGHT NOW HAVE A LOOK ON MY REVIEW I AND MY TEAM IS READY TO COMPLETE YOUR WORK WITH A QUALITY WORK I have gone through your project requirement specification and as per my p Mais

$3000 USD in 25 dias
(549 Comentários)
8.4
ptiweb

I would like to offer my solution for this project and hence come up with a desired solution for the same. Before moving further I want to learn all the basic concepts and scope of the existing work so that I can get w Mais

$4000 USD in 25 dias
(145 Comentários)
8.1
wuyong2020

Hello. I am mobile app expert and have experienced a lot with mobile app backend development. This project is very interesting for me and perfect fit with my skills. I would like to discuss more details with you. Hope Mais

$3000 USD in 7 dias
(73 Comentários)
7.7
mitss

Hello, As i check this app is based on audio, video and text chat system app same like whatsapp chat system app. we need to develop replica of whatsapp or some additional features and functions such like all those ex Mais

$12000 USD in 95 dias
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8.0