Giulio Collesei

Senior Product Engineer Italy

Contact

work@giulio.me ↗ LinkedIn ↗ Portfolio ↗ Portfolio case study ↗

About

Product Engineer (Front-End) with two decades of experience at the intersection of FinTech, DeFi, and interactive 3D web. Specialized in building seamless, highly-optimized interfaces for complex on-chain protocols or immersive experiences. Recipient of 40+ international awards for excellence in technical execution.

  • Skills /
    Technical Stack

    Front-End

    TypeScript, React, Next.js, Remix, GSAP, Three.js (WebGl, WebGPU), GLSL, TSL, Tailwind CSS, Ethers, Wagmi, Viem, ReChart

  • Back-End

    Node.js, Nest.js, REST, GraphQL, PostgreSQL, Subgraph, Tenderly, Sentio

  • Real-Time & AI

    WebSockets, Server-Sent Events (SSE), LiveKit (WebRTC), Streaming LLM responses

  • Misc

    Figma, Cypress,, Playwright, Headless CMS (Dato, Sanity, Storyblok, Netlify), CI/CD

  • Languages

    Italian Native · English Professional working proficiency

Recognition

The products I've developed have earned over 40 international awards from major industry bodies like Awwwards, The FWA, CSS Design Awards and iF Design, reflecting a consistent commitment to technical standards and user experience.

  • Work Experience

    Senior Front-End Engineer

    I realize high-end experiences for modern products. Here is a list of technologies I'm currently using:

    • Frontend Architecture: engineering high-end, scalable applications using TypeScript, React, and Next.js/Remix with a focus on Hybrid Rendering (SSR/SSG) for optimal performance.
    • Real-Time AI Integration: implementing Server-Sent Events (SSE) and WebSockets for streaming AI responses and leveraging LiveKit (WebRTC) to architect low-latency, real-time voice interactions.
    • Security & Infrastructure: architecting secure environments using JWT-based authentication and integrating robust Payment Gateways (Stripe/Adyen) for global scalability.
    • Web Vitals Optimizations: led core web witals optimization, delivering substantial gains in performance and Lighthouse scores.
  • Lead Front-End Engineer

    Factor is a no-code middleware platform for DeFi that enables users to create, automate, and manage complex on-chain strategies via a modular, drag-and-drop interface.
    I led a team of four frontend engineers in delivering a seamless user experience across all digital touchpoints.

    • Leadership: eliminated operational bottlenecks for a team of four by implementing structured Agile workflows. Restored consistent delivery cycles within 30 days through strategic resource alignment and technical mentorship.
    • Architectural Overhaul: engineered a centralized Design Library and Data Layer to consolidate four disparate codebases into a modular architecture, drastically reducing technical debt and code redundancy
    • Transaction Architecture: re-engineered the multi-step transaction flow for complex on-chain strategies, managing asynchronous states for token approvals, signatures, gas estimation and real-time transaction tracking.
    • Web3 Integration: Directed the integration of MetaMask, WalletConnect, and Gnosis Safe; leveraged RPC and Tenderly for advanced data indexing and debugging
    • Technical Governance: established code review standards to ensure security and maintainability across all digital touchpoints
  • Software Engineer (Frontend)

    Alto is a decentralized lending protocol for minting DUSD stablecoins against yield-bearing collateral.

    • Engineering: Maintained a TypeScript and Next.js codebase, ensuring high-performance and responsive UI delivery across the full product suite
    • Design System Ownership: Architected the Storybook brand design library to standardize UI components and streamline the hand-off between UX and engineering.
    • Transaction Logic: Engineered a complex, multi-step transaction flow handling asynchronous states across multiple chains leveraging LayerZero APIs, and user interactions.
    • Web3 Infrastructure: integrated and optimized data fetching and debugging workflows using RPC, Subgraphs, Tenderly, and various Wallet providers.
    • Cross-Chain interoperability: developed specialized landing pages for NFT minting and omnichain "teleportation" leveraging LayerZero protocol for seamless cross-chain asset transfers
  • Creative Technologist

    • Interactive Architecture: designed and engineered complex 3D and XR experiences, writing Game Design Documents (GDD) and creating functional prototypes using Three.js/WebXR and Unity.
    • Performance Optimization: Maximized frame rates and minimized memory footprints by optimizing GLSL shaders and managing GPU draw calls
  • User Experience Engineer

    Bridged the gap between design and technology by streamlining studio workflows through technical consultancy, feasibility modeling, and high-fidelity rapid prototyping.
    Managed end-to-end production of digital artifacts, leading external development partners to ensure technical execution remained 100% faithful to the design vision.

    • Design Systems: Developed and governed scalable Design Systems and component libraries to bridge the gap between Figma designs and production code.
    • Headless Architecture: Implemented decoupled CMS infrastructures using Storyblok and DatoCMS to manage dynamic content across multiple platforms
    • Quality & CI/CD: use Cypress and Playwright for E2E flows, integrated with Vitest for unit testing; established CI/CD pipelines to enforce UI stability and prevent regressions during rapid deployment cycles.
  • Front End Developer

    • High-Performance Creative Development: Built award-winning interactive SPAs by optimizing DOM manipulation, reducing CPU/Memory overhead, and fine-tuning execution threads to meet the rigorous technical standards of Awwwards, The FWA, and CSS Design Awards.
    • Front-End Architecture: Engineered scalable architectures using Node.js and React with Server-Side Rendering (SSR) to balance high-fidelity visuals with SEO and performance.
    • Advanced Tech Stack: Leveraged TypeScript, RxJS for complex event-stream handling, and WebGL for high-performance hardware-accelerated graphics.
    • State & Style Management: Implemented predictable state containers using Redux and modularized styling via CSS Modules to ensure codebase maintainability across large-scale creative projects.
    • Technical Governance: Orchestrated technical peer reviews and criticality analyses to drive continuous improvement in code quality and system performance.
  • Early career in Design & Development (2006-2014)

Side projects

  • NineMoons

    React Native app that gives new parents a weekly card deck for their pregnancy. Swipe to read a mix of medical, spiritual, and religious information, one week at a time.
  • GiftAI

    Offline PWA that collects cards from multiple sellers and tracks spending per card. You take a photo of any card; AI extracts the data and writes it to a PostgreSQL real-time database—no forms to fill.