Imagen de perfil de roman921111
Bandera de Ukraine Kharkiv, Ukraine
Miembro desde 3 de abril de 2016
0 Recomendaciones


En línea Desconectado
Top Talent, Reliable and Speedy! I think the responsibility for my working and top talent are key for the success. High Quality Full-Stack Service: ★ Robust Defensive Programming & Clean Coding ★ Flexible & Strong OOP Design by applying modern design patterns ★ Full and Sincere Guide from Conception to Publishing My most special experiences are in building of social dating and chatting apps(XMPP based). Individual Mobile Developer with 4+ years experience in the following areas: ★ iOS Native App Development ★ Android Native App Development ★ Mobile Web Services by PHP based, Firebase and Amazon Web Services(AWS)
$30 USD/hr
6 comentarios
  • 100%Trabajos finalizados
  • 100%Dentro del presupuesto
  • 100%A tiempo
  • 14%Tasa de recontratación


Comentarios recientes

  • imagen de jasonaud output ios app $25.00 USD

    “Did great. Very fast and knew exactly what i needed and did in short time.”

  • imagen de AmnesiaM Simple iphone App Update $155.00 USD

    “Fantastic person, very good at the work he has done & I will be using him again for sure on another project soon A1 :D”

  • imagen de DanJoseph1 Project for roman921111 $70.00 USD

    “Great work uploading iOS and Android script along with backend web based API and fixing bugs and updating code associated with it.”

  • imagen de DanJoseph1 Upload iOS application, AWS web API and Android App scripts $122.00 USD

    “Great work! Uploaded my app and fixed bugs in 24 hours”

  • imagen de Aubit iOS app project $166.00 AUD

    “Thank you for great work”

  • imagen de Anton K. Project for roman921111 $100.00 USD

    “Roman was really brilliant mobile developer. He has completed this task in very short time and with high quality. I was very happy to work with him. I will use again for more tasks in the future. Thanks again!”


Mobile Programmer For Centr Labs

Jul 2015 - Jan 2016 (6 months)

I have experienced following skills throug this project: ✓ Payment processing and gateway integration ✓ Secure and fast communication via HTTP ✓ Building of Jabber chatting server and interaction via xml-rpc ✓ Geocoding and Location processing. ✓ Cloud computing by AWS and design system architecture ✓ In App Purchase, Push Notification, In App Sharing and Deep Link Sharing

iOS Developer for YeeCall

Sep 2014 - Sep 2015 (1 year)

This app integrates the functions like photo editing/sharing, video/voice call, group communication, social integration, location sharing and etc into one app. ✓ High quality VoIP/SIP video&voice chat function and multi-channel group chat by WebRTC. ✓ Consuming REST services via JSON, uPnP, TURN server and low level Socket programming ✓ Integration and Single Sign On of Social Media frameworks like Facebook, Twitter and Google+ ✓ Building of LBS by GPS, Google Map API

iOS Developer for Bug Fixing and Update of Live Sports

Apr 2013 - Aug 2014 (1 year)

I have participated in the mobile development team as an individual contributor for fixing and updating of ESPN - Get scores app. I have experienced following areas during this project: ✓ TVMaze ✓ Consuming REST/SOAP services via JSON/XML ✓ Integration of Google App Engine ✓ High quality audio & video HLS/RTMP streaming based on FFmpeg ✓ SQLite, Core Data, Realm, MySQL Databases and Normalization of schema ✓ Source Management and Cooperation by GitHub, Bitbucket and SVN


Bachelor of Engineering (B.Eng.)

2008 - 2012 (4 years)


Master Apple iOS 7 Development Certificate (2016)


Transcript ID#: 13044299 Score: Scored higher than 91% of all previous test takers (Top 10%). Demonstrates a clear understanding of many advanced concepts within this topic. Appears capable of mentoring others on most projects in this area. Strengths: ✓ Cocoa Touch APIs ✓ Cocoa Design Patterns ✓ Cocoa Programming


  • iPhone Development 1
  • Java Level 2
  • US English Level 1
  • Android 1
  • Ruby
  • xcode v4 level 1
  • Objective C Level 1
  • AWS
  • Java Level 1


  • Conectado a Facebook
  • Freelancer preferente
  • Pago verificado
  • Teléfono verificado
  • Identidad verificada
  • Email verificado

Mis habilidades principales

Buscar freelancers similares