Contributed to Pago Fácil development with 1.5M+ downloads and 500K monthly active users.
From idea to product reality1.5M+Downloads on developed apps 4+Years in FinTech and EventTech React NativeMain specialty
Luis Espinoza IA-Driven Product Engineer
Experience developing in high-demand technical sectors like finance and events.
Native mobile development for iOS and Android with clean architecture and optimized performance.
Based inBuenos Aires · Remote-first
- Bizland Tech
- Western Union
- Pago Fácil
- Hybeans
- FastForm
Stack & AI Arsenal
WORKS
Real-world projects where technical excellence meets business impact. From FinTech platforms serving 1.5M+ users to EventTech experiences processing thousands of real-time transactions—these are production systems, not demos.
FINTECH · MOBILE
Pago Fácil & Western Union
Mobile Developer at Bizland Tech contributing to a mission-critical PSP (Payment Service Provider) solution powering Pago Fácil's 1.5M+ downloads and 500K monthly active users. Shipped production features for Western Union integration, optimized app stability and resolved P0 incidents affecting real financial transactions.
- Architected PSP integration layer supporting multiple digital wallets (Western Union, local payment providers) with transaction-level reliability.
- Shipped production features using React Native, TypeScript, Redux for state management, and Firebase for real-time data sync.
- Reduced crash rate by 40% through performance profiling, memory optimization and proactive error boundaries.
- Resolved P0 production incidents with <30min response time, maintaining 99.9% uptime during peak transaction hours.
Core stack
ART · EXPERIMENTAL
0-Registros
Zero-to-one experimental platform blending poetry, generative visuals and technology. Built a multi-language Next.js experience with p5.js animations and Firebase to support live performances.
- Designed immersive storytelling with adaptive layouts and typographic systems.
- Implemented a real-time creative engine combining p5.js scenes with curated writing.
- Deployed bilingual monorepo with CMS-like authoring and staging for exhibitions.
Core stack
EVENTTECH · MOBILE
Hybeans App
Built the flagship mobile experience (iOS & Android) for Hybeans EventTech platform, enabling real-time social interaction, e-commerce and ticketing for live events with thousands of concurrent users.
- Architected end-to-end mobile flows: Firebase Auth, real-time social feeds, live event booking system and in-app checkout processing payments during live events.
- Built robust notification system with Firebase Cloud Messaging, deep linking navigation and analytics tracking (Mixpanel) covering complete user journey.
- Delivered features under tight event deadlines with zero downtime during peak traffic, coordinating across design, backend and QA teams.
Core stack
SAAS · AUTOMATION
Fast Form
Co-founded and engineered FastForm, a SaaS automation platform that transforms how teams create Google Forms—reducing 2-hour manual processes to 2-minute AI-powered workflows using GPT-4, CSV imports and visual builders.
- Architected full-stack SaaS product: GPT-4 powered chat interface, CSV parser with validation, drag-and-drop form builder and draft management system.
- Built production app with Next.js 15 (App Router), React Server Components, TypeScript, Tailwind and Vercel deployment—achieving <1s page loads.
- Integrated OpenAI API with streaming responses, Google Forms API for programmatic creation, OAuth 2.0 authentication and MercadoPago subscription billing.
Core stack
OPS · NOTIFICATIONS
NOUS - Push Notify
Built a secure operations console for NOUS to orchestrate mass push notifications across their mobile ecosystem.
- Implemented admin onboarding with service credential management and role-based access.
- Added campaign segmentation, scheduling and live delivery telemetry dashboards.
- Hardened Firebase Cloud Messaging pipelines with audit-ready logging and monitoring.
Core stack
EDTECH · WEB
Filoweb
Designed Filoweb, an educational experience guiding newcomers through the history of philosophy with interactive storytelling.
- Crafted narrative UX with timelines, author journeys and responsive layouts.
- Optimized accessibility and performance to support classroom usage on any device.
- Structured modular content so educators can publish new chapters without touching code.
Core stack
EVENTTECH · WEB
Hybeans Web
Extended Hybeans to the web with conversion-driven landing pages, booking flows and personalization.
- Built booking engine with real-time availability, payment checkout and confirmation flows.
- Created customizable member profiles with social features and team dashboards.
- Optimized React bundling with lazy loading and code-splitting to reduce initial load by 40%.
Core stack
SERVICE · OPERATIONS
AEG Ceramic Ovens
Delivered an operations platform for AEG Hornos de Cerámica, unifying marketing site and CRM backoffice for specialized technicians.
- Developed CRM with customer segmentation, pricing management and suggestion pipelines.
- Integrated TinyMCE email editor, Resend API and WhatsApp automations in one hub.
- Implemented validations, pagination and media handling to keep data quality high.
Core stack
Proof points
Technical experience in mobile and web application development. A snapshot of companies, projects, and technical achievements in my career.
Company experience
Companies where I've contributed as a developer in FinTech, EventTech, and web projects.
- Bizland Tech
- Pago Fácil
- Hybeans
- FastForm
- Freelance
Technical achievements
Notable technical contributions in real projects.
Development in Pago Fácil with 1.5M+ downloads
Contributing to key functionality development in PSP solution and FinTech app improvements.
Hybeans EventTech platform
Developed end-to-end functionalities for event management, real-time calendar, and ticketing system.
Freelance projects with Spring Boot
Created custom management systems and responsive websites for organizations.
Let's develop your next project
Specialized in mobile and web development with React Native, TypeScript, and AI tools. Ready to contribute to your technical team.
SKILLS
Mobile-first engineer who ships production-ready features at 10x velocity. Powered by AI tools and battle-tested in FinTech (1.5M+ users) and EventTech platforms. Here's how I turn complex requirements into elegant, scalable solutions.
4+ yearsbuilding scalable applications
8+projects delivered end-to-end
10x fasterwith AI-assisted development
Mobile & Web Development
Architect and ship production-grade mobile and web applications trusted by millions of active users.
- Build native iOS & Android apps with React Native, achieving 60fps animations and offline-first architecture.
- Develop high-performance web apps with Next.js 15, React 19 and TypeScript, optimized for Core Web Vitals.
- Integrate complex payment APIs (Western Union, MercadoPago), OAuth flows, real-time databases and push notification systems.
Architecture & AI Tools
Apply Clean Architecture and accelerate development with AI.
- Leverage AI tools (Cursor, Claude Code, Codex, Copilot, Warp) to accelerate development, automated testing and intelligent debugging.
- Architect clean, maintainable codebases using MVVM and MVCP patterns with separation of concerns.
- Build scalable infrastructure with Firebase, AWS Lambda, PostgreSQL and cloud-native microservices.
Collaboration & Continuous Delivery
Work efficiently in agile multidisciplinary teams.
- Collaborate closely with design, QA and backend teams.
- Participate in agile methodologies and high-pressure deliveries.
- Maintain quality code with Git, testing and clear documentation.
“
The intersection of AI-assisted development and clean architecture principles. I don't just write code faster—I ship production-ready features that scale.
Development PhilosophyETHOS
Empathy from philosophy sharpens my product thinking. Precision from engineering ensures architectural excellence. AI tools (Cursor, Claude Code, Codex, Copilot, Warp) multiply my velocity 10x without sacrificing craft.
Curiosity in practice
Always learning—philosophy, systems and craft to match ambition with delivery.
Philosophy taught me to interrogate problems deeply before writing a single line of code
understanding the 'why' creates better solutions.
I approach development as a craft
clean architecture, meaningful tests, and AI tools that accelerate without compromising quality.
Every feature I ship is production-ready, monitored, and built to scale
because velocity without reliability is just technical debt.
Trajectory
- 2024—NowMobile Developer FinTech · Bizland Tech
Developing PSP solution integrating multiple digital wallets and improving Pago Fácil app with 1.5M+ downloads.
- 2022—2024Web & Mobile Developer · Hybeans
Developed event platform with end-to-end features, real-time calendar and digital ticketing system.
- 2020—2022Full Stack Developer · Freelance
Created custom management systems with Spring Boot, PostgreSQL and responsive websites for organizations.
Engineering Philosophy
Mobile-first architecture with AI-accelerated workflows. React Native expert who's shipped features to 1.5M+ users in production FinTech apps.
Technical Excellence
Master of modern stack: React Native, TypeScript, Next.js 15, Firebase, AWS. Powered by Cursor, Claude Code, Codex, Copilot and Warp for 10x development velocity.
AI-Driven Approach
Luis Espinoza
AI-Driven Product Engineer
Me enfoco en experiencias web que conectan negocio y personas, con ciclos rápidos y colaboración cercana.