Nemanja Krivokapic

Beograd, Serbia

Member since February 3, 2015

Nemanja started seven years ago as web developer on the LAMP stack. Through the years, he has moved from custom CMS projects to enterprise-scale, high-availability platform Java development. Thanks to his broad technical experience, he's currently working on OTT/IPTV streaming platform development as a Java Core senior engineer.

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Portfolio

United.Cloud
Java, FFmpeg, H264, TS/FMP4, DRM, MPEG-CENC
KNetwork Solutions
PHP, Silex, MySQL, MongoDB, AngularJS, React.js, Java, Spring
Seven Bridges Genomics
Java, Jersey, Hibernate, JPA, Jackson

Experience

PHP, 6 years
MySQL, 5 years
AWS SDK, 3 years
Distributed Programming, 3 years
Silex, 2 years
Spring, 1 year

Availability

Part-time

Preferred Environment

Windows, PhpStorm, Sublime, Git

The most amazing...

...thing I've implemented is DRM (MPEG-CENC) protection encryption algorithms for an OTT/IPTV muxer service.

Employment

Java Core Senior Developer
United.Cloud
2016 - PRESENT
- Implemented MPEG-CENC and multicast packet distribution.
- Introduced CI to the build process using Jenkins/Gradle/Nexus.
- Developed MultiDRM for OTT/IPTV.
- Supported native video players in SmartTV.
Technologies: Java, FFmpeg, H264, TS/FMP4, DRM, MPEG-CENC
Owner
KNetwork Solutions
2015 - PRESENT
- Developed a runner time tracker application using AngularJS/Silex technology stack.
- Developed a REST API with Java (Spring).
- Created a skeleton development environment based on Vagrant for quick start on a single-page application with PHP back-end.
- Practiced behavior-driven development based on Behat, Mink, and Chai.
- Created a dynamic image resize component with caching mechanism.
Technologies: PHP, Silex, MySQL, MongoDB, AngularJS, React.js, Java, Spring
Software Engineer
Seven Bridges Genomics
2015 - 2016
- Programmed a JPA library for REST API CRUD operations.
- Refactored a legacy billing system.
- Designed a permission microservice.
- Designed and built a proof of concept for JWT OAuth.
- Achieved 100x speed improvement of the REST API endpoint for large dataset.
Technologies: Java, Jersey, Hibernate, JPA, Jackson
WordPress/AWS Developer
Gampets (via Toptal)
2015 - 2015
- Configured EC2.
- Configured RDS.
- Deployed a WP site to AWS.
- Configured DNS for new environment.
- Suggested the least expensive solution to support customer needs.
Technologies: PHP, AWS, EC2, RDS
CTO
FishingBooker
2015 - 2015
- Designed and implemented a booking system.
- Integrated with PayPal Hosted and PayPal PHP SDK for automatic authorization/capturing funds.
- Integrated with Pipedrive API.
- Implemented background processor tasks that use MySQL table as a priority queue.
- Refactored CodeIgniter code to follow DDD idea and fully utilize new PHP 5.4 functionalities.
- Designed and developed a simple ORM solution based on PDO extension.
Technologies: PHP, CodeIgniter, React.js, jQuery, MySQL
Software Engineer
PSTech
2012 - 2015
- Created a REST API for a mobile and JavaScript application for 3D graphic manipulation.
- Configured and integrated Gearman Job Server with PHP for offloading heavy background tasks.
- Architected a scalable Java application to support a large number of requests using AWS services.
- Created a REST API in Java (Spring) for processing information from desktop client applications and JavaScript web applications.
- Built a Publish/Subscribe component that uses AWS SQS as a queue service.
- Integrated with PayPal checkout payments.
Technologies: PHP, Gearman, Three.js, Java, Spring, AWS (multiple services), AngularJS, React.js
Web Developer
CodeAnvil
2010 - 2012
- Worked as the main developer on http://brandsupply.com platform for graphic designers.
- Developed a daily deals affiliate platform with automatic system for updating daily deals from 10+ deal sites.
- Built a web platform for administration of distributed mini sites through a centralized back-end application.
- Created a project management tool for internal use.
- Programmed a CodeIgniter extension for advanced routing system that is fully configurable through the back-end application.
Technologies: PHP, CodeIgniter, JavaScript, jQuery, MySQL

Experience

FishingBooker (Development)
https://fishingbooker.com
FishingBooker is a startup passionate about fishing that connects captains with people looking to book a charter online. My responsibilities include but are not limited to:

Technologies: PHP, CodeIgniter, MySQL, PDO, Guzzle, PayPal PHP SDK
InsideMaps (Development)
https://www.insidemaps.com/
InsideMaps is a smartphone/tablet app that allows users to easily create a 3D model and floor plan of their home.

Once a 3D model is created, we provide an immersive, quick, web-based 3D environment with innovative tools to help potential home buyers visualize the interior of a home and for homeowners to try furniture and make home improvements in their virtual home.

Technologies: PHP, Zend Framework 2, Gearman, AWS, ThreeJS, jQuery, PayPal Checkout integration
XooPlate (Development)
http://xoo.me/
XooPlate is a gallery of free templates for different purposes. It has more then 1 million free templates at the moment available for free download. My job as a Web Developer was to refactor the current v2 system to v3 and implement responsive design elements. Another big task was optimization. It was my responsibility to optimize it as much as possible so it becomes much more smoother and quicker for the visitors. We successfully launched v3 version on April 5, 2013.

Technologies: PHP, CodeIgniter, MySQL, Bootstrap CSS, jQuery
Brandsupply (Development)
http://brandsupply.com
Brandsupply is an online market place for creative services. We match demand (SME's) and supply (Creatives) in the field of creative services such as logo/stationary design, website design, advertisements, banners, etc. Find out more through www.brandsupply.nl.

Technologies used: PHP, CodeIgniter, MySQL, jQuery

Skills

Languages
Java, PHP
Frameworks
CodeIgniter, Spring, Silex, Gearman, Jersey 2, Hibernate, Zend Framework 2
Tools
AWS SDK, AWS SQS
Paradigms
Object-oriented Programming (OOP), REST, Distributed Programming, Scrum
Libraries/APIs
PayPal API, JPA, Jackson
Platforms
Amazon Web Services (AWS), AWS EC2, Unix
Storage
MySQL, MongoDB, CouchDB
Misc
AWS CloudWatch, AWS S3, MPEG-DASH, High Availability, Video Encoding, Digital Rights Management (DRM), HTTP Live Streaming (HLS)

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