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Sergei S.
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Sergei S.

iOS developer

The last five years I spent working for Upwork itself as Sr. iOS Developer, developing its iOS app. I’ve been writing iOS applications for more than 10 years. I enjoy creating great software with user friendly UI. At every project I pay special attention on design, architecture, code support. I have professional knowledge of development in most of iOS Frameworks in all iOS layers. I’m responsible and focused on goals. Always trying to finish every project I work on. I graduated from Moscow State University of Economics Statistics and Informatics in 2009 as a mathematician and programmer. Several years I spent working in J2EE field, after that I started working as iOS developer. Several finished projects on the AppStore: Upwork, BoardMaps, Plain flashcards, Avtodor, QTickets. The first three are written in swift. I always try to find time to learn something new, I follow several projects on Github (my github profile - sidslog). Sometimes I participate in discussion on StackOverflow. I try to visit as many conference as I can or watch videos from this conference (WWDC is my favorite).

🇷🇸Belgrade, Serbia$60/hr100% JSS5.00 (31)Since Oct 2012

Earnings and projects

MRR
$9.3k

Last 6 months ÷ 6

World#1,524 / 412k
🇷🇸Country#13 / 4,015
Revenue, last 30 days
$8.7k

Last 6 months: $56k

World#1,974 / 412k
🇷🇸Country#18 / 4,015
Total earnings
$892k
World#777 / 412k
🇷🇸Country#7 / 4,015
Per project
$41k

$28k in the last 6 months

World#1,508 / 412k
🇷🇸Country#16 / 4,015
Projects, last 6 months
2
0% fixed100% hourly
World#88,918 / 412k
🇷🇸Country#736 / 4,015
Projects in all
22

Across 33 contracts

0% fixed100% hourly
World#124,452 / 412k
🇷🇸Country#1,614 / 4,015

Earnings, last 30 days

$892k+$8.7k earned in the last 30 daysBilled in all, before Upwork's fee · drag across the chart to see what was earned in any stretch
$880k$885k$890k$895kOct 8Oct 23Nov 7

Skill rankings: Top 0.70% in Objective-C

Top 1% in 2 of 5 skills, ranked by MRR among everyone on Upwork with the skill.

  1. #5Unit Testing669 freelancers · 🇷🇸 #1Top 0.75%
  2. #9Objective-C1,282 freelancers · 🇷🇸 #1Top 0.70%
  3. #12iPad App Development446 freelancers · 🇷🇸 #1Top 3%
  4. #39Swift3,634 freelancers · 🇷🇸 #1Top 1%
  5. #70iOS Development6,533 freelancers · 🇷🇸 #1Top 1%