Cristian
Full-stack
About me
I'm , known online as , a from . I work mainly with , , , , and , building web and mobile products, APIs and integration-heavy features. Professionally, I have worked on application-layer integrations involving , , and wallet/payment infrastructure, primarily by integrating existing SDKs, APIs and core libraries into production applications. Outside client work, I build projects around local-first software, peer-to-peer systems, developer tooling and . I enjoy working across product, architecture, debugging and integration, especially when a project involves unusual technical constraints.
Skills & Tech Stack
Technologies I use regularly across work
Frontend & Mobile
TypeScript
React
NextJS
Tailwind CSS
Expo / RN
Backend & Data
Bun JS
NestJS
PostgreSQL
SQLite
REST APIs
WebSockets
Tools
Git
Vercel
Supabase
Docker
Bash
GH Actions
AI & Agentic Workflow
Opencode
Codex
MCP
OMP
Hermes
Career History
My professional experience across
Full-stack Developer
Apr 2026 — Present•4 months
- 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.
TypeScriptReactNode.jsREST APIsPayment IntegrationsWallet Integrations
Blox Space
Blox Space is a Bitcoin-focused hub in the heart of Turin connecting developers, startups, and companies building on Bitcoin. The space hosts a specialized coworking and offices for builders working on financial infrastructure, while organizing meetups, workshops, hackathons, and industry events that foster collaboration within the global Bitcoin ecosystem.
Turin, Piedmont, Italy•Hybrid
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.
Apr 2026 — Present•4 months
TypeScriptReactNode.jsREST APIsPayment IntegrationsWallet Integrations
React Native Engineer
Apr 2025 — Apr 2026•1 year
- 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.
React NativeExpoTypeScriptNostrSQLiteE2E Testing
Portal Technologies Inc
Portal is developing a revolutionary decentralized identity and payment protocol. Our universal mobile app enables self-sovereign digital identity management, passwordless authentication, Lightning Network payments, and zero-knowledge proofs without platform lock-in.
Brescia, Lombardy, Italy•Hybrid
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.
Apr 2025 — Apr 2026•1 year
React NativeExpoTypeScriptNostrSQLiteE2E Testing
Frontend Developer
Aug 2023 — Jul 2024•11 months
- 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
NextJSViteJSAngularAPIs
Enhancers - Tinexta Group
Enhancers - From raw pixels into finished products. We make digital products that really matter.
Turin, Piedmont, Italy•Remote
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
Aug 2023 — Jul 2024•11 months
NextJSViteJSAngularAPIs
Full-stack Developer
May 2023 — Aug 2023•3 months
- 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
- Developed real-time lead tracking functionality that displayed Facebook conversions via toast notifications
NestJSExpress.jsAngularSocket.ioMicroservices
Frontend Developer
Jan 2023 — May 2023•4 months
- Created responsive landing pages for TIM ad campaigns
- Implemented key features for the company's backoffice CRM solution using Angular
- Main company website maintenance
ReactJSExpress.jsAngularCMS
Entiende
Entiende S.r.l. provides communication services and manages data to build a strong and innovative network based on respect and professionalism.
Naples, Campania, Italy•Remote
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
- Developed real-time lead tracking functionality that displayed Facebook conversions via toast notifications
May 2023 — Aug 2023•3 months
NestJSExpress.jsAngularSocket.ioMicroservices
Frontend Developer
- Created responsive landing pages for TIM ad campaigns
- Implemented key features for the company's backoffice CRM solution using Angular
- Main company website maintenance
Jan 2023 — May 2023•4 months
ReactJSExpress.jsAngularCMS
Portfolio
A I build and maintain, with source code and live implementations where available
MinePanel
7
Self-hosted Minecraft management, secure and cloud-independent. ⛏️
NestJSDockerWebSocketsBun
PearLift
20
A local-first workout tracker with peer-to-peer sync, no accounts, no servers. 🍐
ExpoSQLiteHolepunchF-Droid
Blurkit
31
Universal image placeholder generation across Node, Deno, browser, edge, Cloudflare, and WASM runtimes. 🖼️
BlurHashThumbHashWASM
Blog
Occasional posts on interesting development and
Preparing for Mythos
39
A Sunday night with an open model showed me how much the cyber floor has moved. 🤖
AICybersecurityAgentic Workflows
Dear mom...
88
Letter to my mother
❤️
What a single day with a new laptop can do to a man
167
One day, one laptop, one big fix 🛠️
LinuxOpen SourceHardwareTuxedo