Customization of LinPhone SIP / VoIP Client

We are in a need of a customization of the opensource VoIP / SIP client LinPhone.

The development has to be done in two phases:

Phase 1: Customization of mobile + tablet apps (iOS + Android)

// Objective C = iOS + Java = Android --> ready in two weeks.

Phase 2: Customization of PC apps (Windows, Mac OSX and Linux)

// Qt/QML = Windows, Mac OSX and Linux --> ready in four weeks.

The main customization's must be:

- Upgrade security

Many security features, which include i.e.:

--> Use TLS connectivity for handshake

--> Use VPN connection for additional security

--> Use ZRTP encryption protocol on VoIP (voice and video) communication

--> Use text encryption for messaging and file sending

--> Database security on app and server

--> Secure connection settings

--> Use code obfuscation protection + Sign the app

--> Harden the security of application / program

--+ Encrypt the entire application

--+ Containerize the entire application

--+ Encrypt the database

--+ Lock screen / Login protection

--+ Brute force protection

--+ Code hardening by Pro+iX Guard

--+ Store encryption keys securely in Trusty

--> Set privacy settings

- Design customization

Many security features, which include i.e.:

All designs are based upon the operation of LinPhone, almost no real custom development.

--> Add a lock screen / login screen prior using app

--> Every function in the LinPhone app is customized by designer

--> APP settings are blocked for users to change - one setting fits all

--> Custom user account settings

SIP server will be setup by an other person if this isn't your specialty to save time and costs.

Budget $750 - $1000 for entire project.

Ready in 2 - 4 weeks (divided in two phases)

Skills: Android, C Programming, C++ Programming, Java, Mobile App Development

See more: voip iphone sip iax client, java web based sip voip client, open source voip sip flash client, voip sip java client, sip voip client blackberry, sip voip client, best wm6 sip voip client, iphone sip voip client sms, windows mobile sip voip client dtmf, mobile phone java sip voip client, nokia sip voip client, sip voip client iphoneblackberry nokia project, command line linux sip voip client, hidden sip voip client

About the Employer:
( 143 reviews ) Den Bosch, Spain

Project ID: #17971232

9 freelancers are bidding on average $868 for this job


Hi I have rich experiences with Linphone and Sip client server. This project is perfect fit with my skill set. Hope to discuss more details with you. Regards

$588 USD in 10 days
(58 Reviews)
$555 USD in 10 days
(79 Reviews)
$555 USD in 10 days
(44 Reviews)

Hello, I read your project description posted. I am a Mobile_App_Development expert and have plenty of experience of it. However, I'd like to discuss more detail with you now. I am free to work now.,.///;'; Kindly More

$555 USD in 10 days
(14 Reviews)

Hello Sir, Hope you are doing well... I have read your requirement and understood that you are looking for a Customization of LinPhone SIP / VoIP Client. I have read your requirement and understood features an More

$1000 USD in 60 days
(19 Reviews)

Hello, I have read your requirement and have understood it well. I have some questions regarding the security features that you have mentioned, so what is the good time to have discussion with you. I have worked on thi More

$1000 USD in 30 days
(6 Reviews)

Greetings, I propose fastest delivery over top software quality, I confirm 2 weeks long maximal delivery timeline Please message if you are interested over the proposal Thanks, Regards

$2000 USD in 7 days
(31 Reviews)

Hi, I have lots of experience in the field. Please have a review of my profile. I offer my services for your project, i assure you of a high quality professional service. We can chat details. I will install asterisk se More

$1000 USD in 30 days
(0 Reviews)

Hi sir i have two experienced android developers in my company and can assign any of them dedicated for your project . Don't worry and we are ready to finish it for you .

$555 USD in 30 days
(0 Reviews)