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Tomas W.

Tomas W.

Senior SaaS Architect | Building Scalable Mobile & Web Ecosystems

I architect high-performance, cross-platform mobile and web applications and SaaS ecosystems using Flutter, React, Node.JS, Go, .NET, Supabase and Firebase. With over 20 years of experience in enterprise architecture, I don't just "build apps" - I engineer scalable digital products with clean code, real-time synchronization, and robust backend foundations. Why Hire a Solutions Architect for your App? I focus on a scalable and long-term implementation. My background in PostgreSQL/Supabase, Firebase, .NET and MSSQL allows me to design backend schemas and API layers that are optimized for scale from day one, preventing the technical debt that kills most startups. Whether you are launching a new startup or migrating a complex enterprise system to mobile, I focus on architectural simplicity and high-stakes business outcomes. My Core Technical Stack: • Mobile: Flutter (Cross-platform iOS/Android), Dart • Web: React, Blazor • Backend: Supabase (Postgres, Edge Functions), Firebase (Firestore, Auth), Node.JS, Go. NET • Real-time & Data: SignalR, WebSockets, Supabase Realtime • Database: PostgreSQL, MSSQL What I Bring to Your SaaS Project: • Architectural Simplicity: Implementing Clean Architecture and BLoC/Cubit to ensure your app is maintainable long-term. • Offline-First & Sync: Expert handling of complex data states and real-time updates for multi-user environments. • Coding Excellence: AI is a great tool to speed-up the development time but should be used with manual expertise expertise to ensure enterprise-grade stability. • Security-First Mindset: Deep experience in Row Level Security (RLS), OAuth, and secure payment integrations. Ready to build a world-class mobile SaaS? Let’s jump on a quick call to discuss your roadmap!

🇸🇪OEsthammar, Sweden$100/hr100% JSS4.95 (9)Since Nov 2011

Earnings and projects

MRR
$412

Last 6 months ÷ 6

World#85,694 / 412k
🇸🇪Country#113 / 817
Revenue, last 30 days
$0

Last 6 months: $2.5k

Total earnings
$474k

Billed in all: $477k

World#3,124 / 412k
🇸🇪Country#3 / 817
Per project
$21k

$2.5k in the last 6 months

World#5,711 / 412k
🇸🇪Country#5 / 817
Projects, last 6 months
1
100% fixed0% hourly
World#128,092 / 412k
🇸🇪Country#224 / 817
Projects in all
23

Across 30 contracts

37% fixed63% hourly
World#120,400 / 412k
🇸🇪Country#210 / 817

Earnings, last 30 days

$477kNothing earned in the last 30 daysBilled in all, before Upwork's fee · drag across the chart to see what was earned in any stretch
$470k$475k$480k$485kOct 8Oct 23Nov 7

Skill rankings: Top 16% in Xamarin

Ranked by MRR among everyone on Upwork with the skill.

  1. #30SignalR149 freelancers · 🇸🇪 #1Top 20%
  2. #54Enterprise Software Development180 freelancers · 🇸🇪 #1Top 30%
  3. #61Gambling378 freelancers · 🇸🇪 #1Top 16%
  4. #69Xamarin434 freelancers · 🇸🇪 #1Top 16%
  5. #81Integration Testing293 freelancers · 🇸🇪 #1Top 28%
  6. #121Unit Testing669 freelancers · 🇸🇪 #1Top 18%
  7. #158Blazor656 freelancers · 🇸🇪 #1Top 24%
  8. #426ASP.NET Core2,272 freelancers · 🇸🇪 #2Top 19%