Mendel serves more than 500 companies across Argentina, Mexico, Colombia and Chile.
From idea to product reality500+Companies operating on Mendel 1.5M+Downloads on FinTech apps AI-firstDeveloper enablement
Luis Espinoza IA-Driven Product Engineer
Contributed to Pago Facil development with 500K monthly active users on iOS and Android.
I build agents, skills and commands with Claude Code to speed up scaffolding, reviews, testing and releases.
Based inBuenos Aires · Remote-first
- Mendel
- Pago Facil
- Western Union
- Hybeans
- FastForm
Stack & AI Arsenal
Fast proof points
Three quick signals for the kind of problems I solve: B2B FinTech product work, consumer scale and delivery accelerated with judgment.
500+ companies operating on Mendel
Mobile features for spend, cards, budgets and travel on top of a multi-brand React Native architecture.
1.5M+ downloads on FinTech apps
Feature delivery, stability work and incident response in products with real transactions and high volume.
Workflows that accelerate without lowering quality
I use agents and automations for scaffolding, review, testing and release with explicit architectural criteria.
WORKS
Real projects where the technical impact is easy to scan: product, contribution and outcome. The strongest cases appear first; the rest stay available to show range and trajectory.
FINTECH · B2B MOBILE
Mendel
I build iOS and Android features for Mendel, a regional platform for corporate spend, cards and travel on top of a multi-brand, white-label React Native architecture.
1 / 5
- Ship cross-platform flows for budgets, transactions, PIN changes and physical or virtual card management.
- Work inside a multi-brand architecture that avoids client-specific forks and supports regional growth.
- Also build AI enablement to standardize scaffolding, review and testing for the mobile team.
Impact: product used by 500+ companies across LATAM for corporate spend, cards and travel.
Core stack
FINTECH · MOBILE
Pago Fácil & Western Union
As a Mobile Developer at Bizland Tech, I contributed to a mission-critical PSP solution for Pago Facil and Western Union, with millions of downloads and real financial transactions in production.
1 / 9
- Architected the PSP integration layer for multiple wallets and providers with transaction reliability in mind.
- Shipped production features and stability work with React Native, TypeScript, Redux and Firebase.
- Handled P0 incidents and helped reduce crash rate by 40% through profiling and app hardening.
Impact: 1.5M+ downloads, 500K monthly active users and stronger operational stability.
Core stack
ART · EXPERIMENTAL
0-Registros
A zero-to-one experimental platform combining poetry, generative visuals and technology in a bilingual experience built for live performance.
1 / 7
- Designed an immersive narrative with adaptive layouts and curated typography.
- Implemented p5.js scenes and real-time logic to support the performative layer of the project.
- Deployed a bilingual base with simple authoring for exhibitions and iterative shows.
works.projects.0-Registros.result
Core stack
EVENTTECH · MOBILE
Hybeans App
Built Hybeans' main mobile experience for social interaction, ticketing and commerce during events with thousands of concurrent users.
1 / 10
- Architected end-to-end flows for auth, booking, real-time feeds and in-app checkout.
- Built notifications, deep linking and analytics to cover the full user journey.
- Shipped under hard live-operation deadlines alongside design, backend and QA.
Impact: platform used during live events by thousands of attendees managing tickets, networking and purchases.
Core stack
SAAS · AUTOMATION
FastForm
I co-founded and engineered FastForm, a SaaS platform that cuts manual form creation from hours to minutes through automation and AI.
1 / 11
- Architected the whole product: AI chat, CSV parser, visual builder and draft flows.
- Built the production app with Next.js, TypeScript and a deployment setup tuned for fast loads.
- Integrated OpenAI, Google Forms, OAuth and billing to turn the idea into an end-to-end workflow.
Impact: teams cut form creation time dramatically through auditable automations.
Core stack
OPS · NOTIFICATIONS
NOUS · Push Notify
Secure console for orchestrating mass push campaigns across the NOUS mobile ecosystem.
1 / 4
- Implemented admin onboarding with service credentials and role-based permissions.
- Added segmentation, scheduling and live delivery telemetry for campaigns.
- Hardened Firebase Cloud Messaging pipelines with audit-ready logging and monitoring.
Impact: less manual operations and better control over mass messaging.
Core stack
EDTECH · WEB
Filoweb
Educational experience for exploring the history of philosophy through interactive storytelling and modular content.
1 / 10
- Designed narrative UX with timelines, author journeys and responsive layouts.
- Improved accessibility and performance for classroom use on any device.
- Structured publishing so new content could ship without touching the core site.
Impact: philosophy program sustained a yearly audience of thousands of readers.
Core stack
EVENTTECH · WEB
Hybeans Web
Web extension of Hybeans focused on conversion, booking flows and personalization for the product's commercial layer.
1 / 12
- Built booking flows with real-time availability, checkout and confirmations.
- Designed customizable profiles with social features and team dashboards.
- Optimized React bundles with lazy loading and code splitting to improve initial load.
Impact: stronger support for bookings and conversions inside the commercial funnel.
Core stack
SERVICE · OPERATIONS
AEG Ceramic Ovens
Operations platform that unifies marketing site and CRM backoffice for specialized technicians.
1 / 11
- Built a CRM with customer segmentation, pricing management and suggestion pipelines.
- Integrated email editing, Resend API and WhatsApp automations in one operational panel.
- Implemented validation, pagination and media handling to keep data quality under control.
Impact: centralized operations and reduced manual follow-up for the team.
Core stack
SKILLS
I do not optimize for tool accumulation. I optimize for production software: understand the business rules, design an architecture that can hold, and ship steadily with product, design, backend and QA.
5+ yearsin production mobile and web
9+products delivered end-to-end
AI-enabledworkflows that speed up delivery without lowering the bar
Problem first
I start with business context, risk and UX before choosing the technical solution.
- Translate complex FinTech, operations and consumer requirements into flows that feel clear and safe.
- Prioritize decisions that improve adoption, reliability and maintainability, not just implementation speed.
- Work comfortably across product, design, backend and QA to land difficult rules without noise.
Architecture that holds
I design technical foundations that survive real product evolution and multi-brand complexity.
- Build React Native and web apps with TypeScript, clear separation of concerns and a focus on scale.
- Work across multi-brand architectures, complex integrations, auth, payments, notifications and real-time data.
- Use Clean Architecture and explicit conventions so the code stays readable as the product grows.
Delivery with cadence
I use AI as an operational lever to ship better, not as a cosmetic speed boost.
- Design agents, commands and automations for scaffolding, review, testing and release workflows.
- Speed up repetitive work while keeping technical judgment, traceability and quality control intact.
- Aim for improvements that outlast me by leaving reusable processes for the team.
“
Speed matters, but speed without structure only moves the problems earlier. My job is to help product and team gain sustainable traction.
Working philosophyETHOS
I care about building software with judgment. In FinTech that means understanding the rules, reducing ambiguity and making technical decisions that are still good when the system grows.
Curiosity in practice
Philosophy, systems and product as training for better thinking under complexity.
I clarify the problem and context before writing code
I prefer sustainable architecture over clever but fragile solutions
Speed matters when it comes with judgment, visibility and operational quality
Trajectory
- 2025—NowMobile & AI Developer · Mendel
iOS and Android features for corporate spend, cards and travel on a multi-brand React Native architecture.
- 2024—2025Mobile Developer FinTech · Bizland Tech
Feature delivery, stability work and incident response for Pago Facil and Western Union inside a PSP stack.
- 2022—2024Web & Mobile Developer · Hybeans
EventTech product work across bookings, ticketing, live operations and real-time interaction.
Operating principles
Before optimizing a screen, I would rather understand which business rule cannot break and which experience must still feel simple.
Product clarity
AI is useful when it turns repetitive work into consistent processes, not when it replaces technical judgment.
Speed with judgment
Luis Espinoza
Senior React Native Engineer
I work on mobile products, with a focus on architecture, sustained delivery and strong technical collaboration.