I have experience in Mobile, Web development, developing an app from scratch or upgrading from existing source code.
*Mobile Skills: 

- Swift

- Objective-C

- Kotlin

- Java

- Flutter, Dart

- Unity3D

* Backend & Web front-end Skills:

- ReactJS, Redux.

- VueJS, Vuex.

- NodeJS, ExpressJS.

- Php: Laravel, CodeIgniter, Zend, Yii

- Java: Spring Boot

- Net Core, Azure

- Ejabberd: for building chat XMPP servers like Whatsapp.

- Strong in TCP/UDP/UDP Reliable socket.

- Strong in RTMP/WebRTC for live broadcasting.

- MySQL, PostgreSQL, NoSQL.

- Restful & GraphQL

- Amazon Web Services, Google App Engine, etc

- Docker.

- Design application architecture.

- Auth0, JWT

* 3rd party APIs:

- Amazon Web Services, Azure, Google Cloud Engine, Shared Hosting, etc

- Facebook, Instagram, Twitter, Flickr, Pinterest, 500px, Google Maps, Google Place, Google Directions, Youtube.

- Stripe, Braintree.

- SendGrid, Mandrill, Mailchimp, Mailjet, CampaignMonitor, Postmark, Amazon SES.

* Communication:

- Contact: Whatsapp, Phone, Email, anything...

- Project Management: JIRA, Trello, Redmine, Basecamp, Asana, Gitlab, Bitbucket, Github, etc

- Source Control: Git, Mercurial, SVN

* Soft-skills: 

- Good in business thinking. 

- Strong technical skills. 

- Strong in technical architecture. 

- Quick learner. I'm always hungry to learn new things. So if you want to make something innovative, I'm very excited. 

- Fluently English communication and good in reading, writing also. 

- Strong management, document, customer support skills. 

- Customer support 24/7 via email, Whatsapp, and phone. 

- Friendly, humble, and honest. 

Don't hesitate to contact me and we can work together in a long-term relationship. 

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Thanks for your time.

Dung