Oscar Minjarez
Product Engineer | SaaS & AI Developer
Software Engineer with 3+ years of experience building multi-tenant SaaS/ERP platforms and full-stack applications. Passionate about integrating local LLMs to automate complex workflows and deliver scalable solutions with real business impact.
services
B2B SaaS & ERP Architecture
Design and development of multi-tenant platforms, complex access control, and scalable business logic.
AI & LLM Integration
Implementation of Gemini AI and local LLMs (Ollama) to automate business processes, data parsing, and user workflows.
API & Payment Integrations
Seamless integration of third-party services like Stripe API for subscriptions, and Government Tax Authority endpoints for automated invoicing.
Full-Stack Web App Development (PWA)
End-to-end development using modern frameworks (Nuxt 4, Laravel, Angular) focusing on high performance and CI/CD pipelines.
experience
Product EngineerErus
Led the development of a multi-tenant SaaS ERP platform (Laravel + Angular) serving enterprise clients. Reduced client onboarding from 2 weeks to 1 hour with an AI-powered Government Tax Authority invoice parser (Gemini AI) that auto-populates catalogs and initial data. Designed and built a pricing app using Nuxt 4 with Stripe API integration, automating recurring payments and subscription management. Developed complex ERP modules: bank reconciliation, file management system, real estate tracking, and investment portfolio tools. Mentored junior developers and guided them through the core development workflow.
Lead Software Engineer (Freelance)Obresport
Built 'Nidyashop' (May 2024 - Present), a custom ERP and POS system from scratch using Nuxt 4, Supabase, and Prisma. The PWA supports atomic database transactions for multi-store inventory management and includes multilingual support (ES, EN, KO). Designed CI/CD pipelines with GitHub Actions and Vercel for seamless deployments. Managed Shopify operations and digital sales channels (2018-2024), identifying bottlenecks that led to the development of the current ERP solution.
Full Stack Developer InternEmcor
Developed an internal WhatsApp broadcast platform from scratch using Vue.js and Spring Boot, enabling secure mass communication for employee networks. Built a custom login system with phone number + OTP verification, implementing rate-limiting to avoid API bans while handling bulk messaging. Optimized the platform to process thousands of messages daily with zero downtime.
Full Stack Developer InternBeAnalítica
Developed 'FixHogar', a home services marketplace with three mobile apps (Client, Expert, Admin) using Ionic and Angular. Designed a scalable REST API with NestJS and PostgreSQL, handling 5k+ daily requests and managing user profiles, service bookings, and ratings. Implemented real-time notifications and payment gateway integration.
projects
Zanate Nunchi - AI Companion Mod for Minecraft
Designed and developed a Minecraft mod that integrates local LLMs (Ollama) as virtual companions, eliminating network latency and API costs. Implemented a Blackboard architecture with Observer-based spatial context analysis. Created a strict dialectal mapping engine supporting 13 languages and 17 regional variants.
education
Bachelor of Software Engineering
Instituto Tecnológico de Sonora (ITSON)
skills
Languages
Frameworks
Databases
Tools & AI
Methodologies & Spoken Languages
Methodologies
Agile/Scrum, GitFlow, REST API design, Microservices
Spoken Languages
Spanish (Native), English (Professional Working Proficiency)
contact
CURRICULUM VITAE
Software Engineer with 3+ years of experience building multi-tenant SaaS/ERP platforms and full-stack applications. Passionate about integrating local LLMs to automate complex workflows.
Oscar Minjarez
Product Engineer | SaaS & AI Developer
Professional Profile
Software Engineer with 3+ years of experience building multi-tenant SaaS/ERP platforms and full-stack applications. Passionate about integrating local LLMs to automate complex workflows and deliver scalable solutions with real business impact.
Professional Experience
Product Engineer
Led the development of a multi-tenant SaaS ERP platform (Laravel + Angular) serving enterprise clients. Reduced client onboarding from 2 weeks to 1 hour with an AI-powered Government Tax Authority invoice parser (Gemini AI) that auto-populates catalogs and initial data. Designed and built a pricing app using Nuxt 4 with Stripe API integration, automating recurring payments and subscription management. Developed complex ERP modules: bank reconciliation, file management system, real estate tracking, and investment portfolio tools. Mentored junior developers and guided them through the core development workflow.
Lead Software Engineer (Freelance)
Built 'Nidyashop' (May 2024 - Present), a custom ERP and POS system from scratch using Nuxt 4, Supabase, and Prisma. The PWA supports atomic database transactions for multi-store inventory management and includes multilingual support (ES, EN, KO). Designed CI/CD pipelines with GitHub Actions and Vercel for seamless deployments. Managed Shopify operations and digital sales channels (2018-2024), identifying bottlenecks that led to the development of the current ERP solution.
Full Stack Developer Intern
Developed an internal WhatsApp broadcast platform from scratch using Vue.js and Spring Boot, enabling secure mass communication for employee networks. Built a custom login system with phone number + OTP verification, implementing rate-limiting to avoid API bans while handling bulk messaging. Optimized the platform to process thousands of messages daily with zero downtime.
Full Stack Developer Intern
Developed 'FixHogar', a home services marketplace with three mobile apps (Client, Expert, Admin) using Ionic and Angular. Designed a scalable REST API with NestJS and PostgreSQL, handling 5k+ daily requests and managing user profiles, service bookings, and ratings. Implemented real-time notifications and payment gateway integration.
Education
Bachelor of Software Engineering
2021 — 2026Instituto Tecnológico de Sonora (ITSON)
Git, GitHub Actions, CI/CD, PWA, Stripe API, Docker, Ollama, Gemini AI
Methodologies & Spoken Languages
- Methodologies: Agile/Scrum, GitFlow, REST API design, Microservices
- Spoken Languages: Spanish (Native), English (Professional Working Proficiency)