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Doug S.

Doug S.

Senior iOS Engineer | Swift, SwiftUI, UIKit, Architecture

Senior iOS Engineer with 10+ years of experience building high-quality apps, fixing critical performance issues, and shipping features end-to-end. I specialize in jumping into existing codebases, diagnosing what’s wrong fast, and delivering clean, maintainable solutions without slowing your team down. I’ve led development on large-scale consumer apps, including high-traffic retail and e-commerce systems, and I’m extremely comfortable with modern Swift, SwiftUI, UIKit, concurrency, Combine, and architectural patterns (MVVM-C, modularization, dependency injection, etc.). What I’m great at: 🔹 Building new features from scratch 🔹 Fixing crashes, optimizing performance, and improving stability 🔹 Cleaning up messy or legacy UIKit code 🔹 Refactoring for modularity and long-term maintainability 🔹 Rapid MVP builds for startups 🔹 Quick bug fixes, triage, and App Store compliance issues I work fast, communicate clearly, and deliver work that holds up long after the project ends. If you need a senior engineer who can ship, not just talk about architecture — I can help. Hourly Rate: $95–$120 (depending on scope and urgency)

🇺🇸Wilmington, United States$95/hr100% JSSSince Jul 2023

Earnings and projects

MRR
$573

Last 6 months ÷ 6

World#72,285 / 412k
🇺🇸Country#10,912 / 62.1k
Revenue, last 30 days
$0

Last 6 months: $3.4k

Total earnings
$15k
World#163,197 / 412k
🇺🇸Country#26,584 / 62.1k
Per project
$15k

$3.4k in the last 6 months

World#9,243 / 412k
🇺🇸Country#1,621 / 62.1k
Projects, last 6 months
1
100% fixed0% hourly
World#128,096 / 412k
🇺🇸Country#16,472 / 62.1k
Projects in all
1
100% fixed0% hourly
World#360,675 / 412k
🇺🇸Country#53,151 / 62.1k

Earnings, last 30 days

$15kNothing earned in the last 30 daysBilled in all, before Upwork's fee · drag across the chart to see what was earned in any stretch
$14.8k$15.0k$15.2kOct 9Oct 24Nov 8

Skill rankings: Top 11% in UIKit

Ranked by MRR among everyone on Upwork with the skill.

  1. #22Code Refactoring118 freelancers · 🇺🇸 #4Top 19%
  2. #94UIKit818 freelancers · 🇺🇸 #7Top 11%
  3. #108RESTful Architecture795 freelancers · 🇺🇸 #12Top 14%
  4. #303Software Architecture & Design1,465 freelancers · 🇺🇸 #46Top 21%
  5. #510GraphQL3,404 freelancers · 🇺🇸 #34Top 15%
  6. #582Swift3,634 freelancers · 🇺🇸 #71Top 16%
  7. #639Mobile App3,535 freelancers · 🇺🇸 #78Top 18%
  8. #675iOS3,908 freelancers · 🇺🇸 #70Top 17%