Hi, I’m Juan Diego Montero Tapia. I’m a Senior Software Engineer and SaaS Architect with 15+ years designing, building, and scaling enterprise software platforms across FinTech, PropTech, AI, and blockchain domains. I specialize in cloud-native, multi-tenant architectures with robust data isolation, secure RBAC, and automated deployment pipelines. I enjoy turning complex problems into resilient systems and mentoring teams to ship production-ready software. I lead remote, contract, and freelance engagements, delivering end-to-end solutions for global clients. I’m passionate about optimizing performance, enabling rapid iteration through DevOps practices, and aligning technical decisions with business outcomes in retail, logistics, finance, and healthcare contexts.…

Juan Diego Montero Tapia

Hi, I’m Juan Diego Montero Tapia. I’m a Senior Software Engineer and SaaS Architect with 15+ years designing, building, and scaling enterprise software platforms across FinTech, PropTech, AI, and blockchain domains. I specialize in cloud-native, multi-tenant architectures with robust data isolation, secure RBAC, and automated deployment pipelines. I enjoy turning complex problems into resilient systems and mentoring teams to ship production-ready software. I lead remote, contract, and freelance engagements, delivering end-to-end solutions for global clients. I’m passionate about optimizing performance, enabling rapid iteration through DevOps practices, and aligning technical decisions with business outcomes in retail, logistics, finance, and healthcare contexts.…

Available to hire

Hi, I’m Juan Diego Montero Tapia. I’m a Senior Software Engineer and SaaS Architect with 15+ years designing, building, and scaling enterprise software platforms across FinTech, PropTech, AI, and blockchain domains. I specialize in cloud-native, multi-tenant architectures with robust data isolation, secure RBAC, and automated deployment pipelines. I enjoy turning complex problems into resilient systems and mentoring teams to ship production-ready software.

I lead remote, contract, and freelance engagements, delivering end-to-end solutions for global clients. I’m passionate about optimizing performance, enabling rapid iteration through DevOps practices, and aligning technical decisions with business outcomes in retail, logistics, finance, and healthcare contexts.

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Skills

Experience Level

AI Images
Expert
AI Chatbot
Expert
Web Design
Expert
Tailwind
Expert
Flutter
Expert
React JS
Expert
Node.js
Expert
TypeScript
Expert
Dart
Expert
JavaScript
Expert
Android
Expert
GitHub CoPilot
Expert
Stripe
Expert
SQL
Expert
PostgreSQL
Expert
Docker
Expert
Express
Expert
GitHub
Expert
Twilio
Expert
GraphQL
Expert
MongoDB
Expert
WhatsApp
Expert
AWS
Expert
Redis
Expert
Python
Expert
MetaMask
Expert
Kubernetes
Expert
Google Cloud
Expert
n8n
Intermediate
HTML5
Intermediate
React Native
Intermediate
Claude
Intermediate
Solidity
Intermediate
ElevenLabs
Intermediate
Golang
Intermediate
Web3
Intermediate
Ethereum
Intermediate
iOS
Intermediate
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Language

English
Fluent
Spanish; Castilian
Fluent

Work Experience

Founder and Senior SaaS Architect at Apps and Web Studio
January 1, 2018 - June 1, 2026
Designed, built, and shipped 9 cloud-native, multi-tenant SaaS platforms featuring complete organization-level data isolation, secure data segregation, and automated white-label subdomain routing. Implemented strong RBAC and row-level security, orchestrated cross-platform caching and deployment, and integrated payment and analytics pipelines. Led AI-powered workflow tooling using OpenAI, Claude, Gemini for data classification, validation, enrichment, and human-in-the-loop controls.
Senior Full-Stack Engineer & SaaS Architect at Apps & Web Studio
January 1, 2018 - Present
Multi-tenant infrastructure: Architected, built, and shipped 9+ cloud-native, multi-tenant SaaS platforms featuring complete organization-level data isolation, secure data segregation, and automated white-label subdomain routing. Designed and enforced Row-Level Security policies for database access; implemented event-driven architecture and serverless edge deployment. Built cross-platform mobile apps with Flutter/Dart, managed local state and caching, and ensured compliance with iOS/Android constraints. Integrated diverse payment gateways (Stripe API, Stripe Connect, Mercado Pago, Nubiz, PixPay) with region-aware checkout pipelines and automated feature gating. Orchestrated API flows and AI integrations using third-party platforms (Meta WhatsApp Cloud API, Twilio, Vapi, ElevenLabs). Implemented AI-driven workflows with LLM orchestration (OpenAI, Claude, Gemini) and custom state machines. Implemented domain-driven design and secure data isolation across tenants.
Senior Full-Stack Developer and Software Consultant at Freelance Software Practice
January 1, 2009 - December 1, 2018
D elivered dozens of scalable web interfaces with React and Next.js for global clients across retail, logistics, finance, and healthcare. Executed data migrations from legacy systems to optimized relational schemas, enhanced API performance, and managed DevOps pipelines with Git, CI/CD, and serverless edge hosting (Vercel, Railway, Docker). Built ERP, CRM, and reporting solutions using API-first architectures and cloud-native deployment workflows.
Senior Software Engineer & SaaS Architect at Freelance (Upwork / People Per Hour)
January 1, 2009 - Present
Full ownership of architecture, backend, frontend, and mobile layers across 23+ production platforms for clients in FinTech, healthcare, hospitality, aviation, and AI. Led design of 9+ multi-tenant SaaS platforms with org-level data isolation, RBAC, and subscription billing. Built scalable REST APIs in Node.js/TypeScript with PostgreSQL and Supabase, including Row-Level Security (RLS) enforced tenant separation. Developed 10+ Flutter mobile apps for iOS and Android with offline support and location awareness. Integrated AI providers (OpenAI, Claude, Google Gemini) into workflow automation and chatbot products. Implemented WhatsApp Business Cloud API end-to-end including webhook ingestion, session management, and chatbot flows. Delivered Stripe-based payment flows and tiered subscription billing for marketplaces and SaaS. Deployed and maintained production apps on Railway, Vercel, and Supabase with CI/CD pipelines and monitoring.
Senior Full-Stack Engineer | SaaS Architect at Freelance
January 1, 2009 - Present
Designed, built, and maintained scalable SaaS platforms with full ownership of frontend architecture, backend services, and data systems. Key projects included multi-tenant systems in various domains, implementing REST APIs, and optimizing PostgreSQL databases.
Senior Full-Stack Developer at Freelance/Self-Employed
January 1, 2009 - Present
Architect and develop production-ready SaaS platforms for diverse industries, specializing in building scalable business applications with sophisticated user management and real-time workflows.
Independent Software Consultant / Senior Full-Stack Developer at Self-Employed / Independent
December 31, 2008 - December 31, 2017
Delivered dozens of scalable web interfaces (React/Next.js) and secure mobile database architectures for global clients across retail, logistics, and healthcare. Led data migrations from legacy single-tenant architectures to optimized multi-tenant schemas with robust data isolation and fast API performance. Managed end-to-end DevOps delivery pipelines using Git/GitHub, automated CI/CD, and serverless edge hosting (Vercel, Railway).

Education

Bachelor of Science in Computer Engineering at Florida International University
January 1, 1993 - January 1, 1997
Bachelor of Science in Computer Engineering (BSCpE) at Florida International University
January 11, 2030 - April 9, 2026
Bachelor of Science in Computer Engineering at Florida International University
January 11, 2030 - May 20, 2026
Bachelor of Science in Computer Engineering (BSC PE) at Florida International University
January 11, 2030 - June 11, 2026

Qualifications

Add your qualifications or awards here.

Industry Experience

Computers & Electronics, Media & Entertainment, Software & Internet, Professional Services, Non-Profit Organization, Healthcare, Financial Services, Education, Travel & Hospitality, Transportation & Logistics
    https://juanmontero.store/projects/tripvify

    Tour Operator Management Platform

    TripVify is an enterprise-grade SaaS platform designed to help tour operators manage their entire business — from lead capture and itinerary creation to reservations, payments, and post-trip operations.

    Built with Next.js, TypeScript, and Supabase, TripVify replaces spreadsheets, emails, and disconnected tools with a unified system designed for modern travel businesses.

    Enterprise CRM & Customer Manage

    https://juanmontero.store/project/34c0560b-740b-469b-8809-8e5556b5e3a5

    FireTrack Pro is a cloud-based fire door compliance platform designed for UK fire safety professionals. It enables organizations to manage fire door assets, conduct mobile inspections, track defects, and generate audit-ready reports aligned with regulations such as BS 8214:2016, PAS 79, and the Building Safety Act 2022.

    https://juanmontero.store/projects/equity-partners

    Equity Partners is a comprehensive PropTech platform designed to streamline real estate investment operations through advanced deal management, investor portfolio tracking, automated accreditation processes, ROI analytics, and secure document management.

    Built for real estate investment firms, the platform digitizes traditional investment workflows and provides institutional-grade tools for managing complex real estate transactions and investor relationships.

    Deal Management & Pipeline Tracking
    •
    Investor Portfolio Management
    •
    Automated Accreditation Processing
    •
    ROI Analytics & Reporting
    View Platform
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    🔒

    https://juanmontero.store/projects/enlistify

    Enlistify is an AI-powered hiring platform that revolutionizes recruitment through intelligent candidate matching, automated screening, and comprehensive analytics. The platform serves both employers and job seekers with dedicated dashboards, streamlined workflows, and data-driven insights to optimize the entire hiring process.