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Marcus K.
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Marcus K.

SQ Software - Mobile Apps | Websites | MVPs | AI Development

Engineering Manager at What's The Move — an event-based social media app I helped build and launch. I also built DragSet, a social media app, from the ground up. Choose a clear starting point in my Project Catalog: a $199 one-day bug fix, a custom website from $999, or an iOS app MVP from $999. Website and app starter packages take 7 days after complete requirements are received. I help founders and small teams ship or repair mobile products fast: SwiftUI/iOS, Firebase, Supabase, and API integrations. If you have a broken feature, a clear MVP, or an existing codebase that needs focused execution, I can get it to a clean, testable handoff. I hold an M.S. in Software Engineering and use a practical, AI-assisted development workflow. I start by clarifying what “done” means, trace the existing behavior, make the smallest reliable change, verify it, and document the handoff. My strongest hands-on work includes: • SwiftUI and UIKit mobile features: navigation, feeds, forms, maps, media, profiles, and device-framework integrations • Firebase: Auth, Firestore, Cloud Functions, public/private data separation, authorization rules, and mobile-app hardening • Supabase: Auth, PostgREST, Storage, RPC, relational queries, and reusable Codable CRUD patterns in Swift • Product MVP work: focused screens, backend wiring, acceptance checks, and lean user flows • API and automation work: TypeScript/Next.js, webhooks, email delivery, serverless workflows, and integration debugging I’m especially useful for well-scoped work such as: • Fixing a reproducible SwiftUI, UIKit, Firebase, Supabase, React Native, or TypeScript issue • Completing one focused screen, flow, or backend integration • Moving a prototype from mock data to a real API or backend path • Investigating an error, defining the smallest fix, and documenting the handoff Relevant work includes a collaborative SwiftUI social-events MVP with feed, MapKit, media, profile, and Supabase functionality; a UIKit AudioKit/MIDI prototype with Firebase persistence; and a UIKit country-browser project with async networking, retry/fallback behavior, and focused tests. Send the goal, affected code or error, and how you will know the task is complete. I’ll respond with the smallest sensible plan, open questions, and a realistic delivery estimate.

🇺🇸Los Angeles, United States$40/hr100% JSSSince Jan 2016
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Earnings and projects

MRR
$188

Last 6 months ÷ 6

World#115,592 / 412k
🇺🇸Country#16,094 / 62.1k
Revenue, last 30 days
$0

Last 6 months: $1.1k

Total earnings
$16k

Billed in all: $16k

World#159,655 / 412k
🇺🇸Country#26,058 / 62.1k
Per project
$7.8k

$1.1k in the last 6 months

World#21,382 / 412k
🇺🇸Country#3,542 / 62.1k
Projects, last 6 months
1

Across 4 contracts

0% fixed100% hourly
World#128,092 / 412k
🇺🇸Country#16,472 / 62.1k
Projects in all
2

Across 9 contracts

11% fixed89% hourly
World#328,886 / 412k
🇺🇸Country#47,959 / 62.1k

Earnings, last 30 days

$16.5kNothing earned in the last 30 daysBilled in all, before Upwork's fee · drag across the chart to see what was earned in any stretch
$16k$17k$18kOct 8Oct 23Nov 7

Skill rankings: Top 17% in Core Data

Ranked by MRR among everyone on Upwork with the skill.

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  2. #105Prototype410 freelancers · 🇺🇸 #12Top 26%
  3. #108App Store302 freelancers · 🇺🇸 #10Top 36%
  4. #179User Authentication698 freelancers · 🇺🇸 #9Top 26%
  5. #196Minimum Viable Product546 freelancers · 🇺🇸 #21Top 36%
  6. #234Push Notifications851 freelancers · 🇺🇸 #15Top 27%
  7. #273SwiftUI951 freelancers · 🇺🇸 #30Top 29%
  8. #796Swift3,634 freelancers · 🇺🇸 #85Top 22%