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Marcin Moldrzyk

@marcinmoldrzyk

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Senior Web3 developer specializing in TypeScript, SvelteKit, and high-performance frontends.

Portugal

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What I'm looking for

I seek roles where I can architect scalable Web3 and frontend systems, collaborate with designers/product teams, and deliver secure, high-performance user experiences with opportunities for technical leadership and impact.

I am a Senior Web3 developer with deep experience building high-performance, user-centric web applications using TypeScript, SvelteKit, Tailwind CSS and modern backend patterns. I have led architecture and full-stack development for platforms that include microservices, real-time features, and robust security—delivering measurable performance improvements and scalable component libraries.

My work spans founding and architecting a modular educational platform, integrating blockchain features for Radix-based dApps, and rebuilding wallet and donation systems. I prioritize clean architecture, testing, accessibility, and close collaboration with design and product teams to create polished, maintainable products.

Experience

Work history, roles, and key accomplishments

Senior Full Stack Engineer

Shardspace

Jan 2025 - Jul 2025 (6 months)

Unified multiple Radix-based dApps to enhance liquidity management and NFT trading, optimizing frontend code to significantly reduce load times and improve scalability using TypeScript and SvelteKit.

TypeScript SvelteKit Radix Web3 Performance Optimization Microservices Docker

Fullstack Platform Architect

WeLearnin

Sep 2024 - Jul 2025 (10 months)

Spearheaded design, architecture, and development of a modular educational platform, improving performance via code splitting, Redis caching, and query indexing while delivering reusable Svelte 5 UI components and real-time collaboration features.

TypeScript SvelteKit MongoDB Docker Redis Playwright WebAuthn

Senior Full Stack Engineer

Radix Works

Apr 2024 - Jul 2024 (3 months)

Developed blockchain-integrated onboarding quests and microservices to drive engagement through smart contract interactions and real-time frontend feedback mechanisms.

Web3 Smart Contracts Microservices TypeScript Real Time Feedback SvelteKit API Design Testing

Senior Frontend Developer

Cielo Finance

Aug 2021 - Feb 2024 (2 years 6 months)

Led a frontend rebuild and architected wallet discovery flows and reusable component libraries, improving user interaction and positioning the product as a leading wallet-alert platform.

SvelteKit TypeScript Component Libraries Responsive Design

Full Stack Developer

GamingForGood

Jan 2017 - Aug 2021 (4 years 7 months)

Led DevOps system development integrating Trello and AWS to accelerate development, built PayPal donation processing, and contributed to web3 auction house development while mentoring junior engineers.