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!
Earnings and projects
Last 6 months ÷ 6
Last 6 months: $2.5k
Billed in all: $477,353$477k
$2.5k in the last 6 months
Across 30 contracts
Earnings, last 30 days
Skill rankings: Top 16% in Xamarin
Ranked by MRR among everyone on Upwork with the skill.
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