Cristian
Full-stack
I'm , known online as , a from . I build reliable web and mobile products, including applications involving , , and wallet/payment infrastructure.
Outside client work, I build projects around local-first software, peer-to-peer systems, developer tooling and . I enjoy architecture, debugging and implementation, especially under unusual technical constraints.
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Skills & Tech Stack
Technologies I use regularly across work
Frontend & Mobile
TypeScript
React
NextJS
Tailwind CSS
Expo / RNBackend & Data
Bun JS
NestJS
PostgreSQL
SQLite
REST APIs
WebSocketsTools
Git
Vercel
Supabase
Docker
Bash
GH ActionsAI & Agentic Workflow
Custom Skills
Pi
MCPs
Hermes03
Career History
My professional experience across
Full-stack Developer
- Contributed to application and integration-layer development for digital payment products across React/TypeScript frontends and Node.js backend integrations.
- Implemented product and authentication flows including localization and email OTP, while working on payment UI, transaction state, error handling and integration reliability.
- Built payment UI and supporting backend integrations for Telegram Mini Apps and product prototypes using existing APIs, SDKs and provider infrastructure.
- Researched and specified integrations across wallet and payment providers, including UR / Fiat24, Privy and Gnosis Pay, translating provider capabilities into implementation plans and technical decisions.
- Supported product and architecture work around KYC, wallet flows and custodial/non-custodial payment models, including research and prototyping related to Bitcoin, Lightning and digital-asset payments.
React Native Engineer
- Developed and maintained the React Native + Expo application layer of Portal App, integrating a shared Rust core library through UniFFI bindings and consuming its functionality from the mobile application.
- Built and maintained onboarding, AppLock, cloud backup, profile and identity synchronization, and offline-first application flows across complex mobile state and lifecycle scenarios.
- Integrated Nostr functionality including nsec handling, NIP-05 identity resolution and profile synchronization.
- Integrated Bitcoin and Lightning functionality exposed through existing SDKs and core services, including Breez SDK, NWC, QR/NFC payment flows and payment-status synchronization.
- Worked on app-side secure storage, biometrics, SQLite/Drizzle data flows, native Kotlin/Swift integrations, Jest and Maestro E2E testing, and debugging of lifecycle, state and migration issues.
Frontend Developer
- Developed IoT device management dashboard UI for Tecnoalarm using Angular, implementing designs from Figma specifications
- Created new customer portal for Illumia energy company with React, enhancing user experience for account management
- Implemented responsive and intuitive interfaces following design system guidelines
- Collaborated with backend teams to integrate API endpoints for IoT device data
- Applied performance optimization techniques to improve application responsivenes
Full-stack Developer
- Designed and built a real-time notification system using Socket.io and NestJS
- Created a microservice architecture connecting Express.js backend with Angular frontend
- Developed real-time lead tracking functionality that displayed Facebook conversions via toast notifications• Designed and built a real-time notification system using Socket.io and NestJS
- Created a microservice architecture connecting Express.js backend with Angular frontend
Frontend Developer
Jan 2023 - May 2023 // 4 monthsNaples, Campania, Italy // Remote
- Created responsive landing pages for TIM ad campaigns
- Implemented key features for the company's backoffice CRM solution using Angular
- Main company website maintenance
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Portfolio
A I build and maintain, with source code and live implementations where available
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Contacts
You can through the following channels:
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