Yahir Alberto
I architect platforms that connect business-critical systems — from discovery to production, with code operations never has to touch again.
Core stack
Full-Stack Developer · ERP Integration · Multi-tenant SaaS
Full-Stack Developer with 3+ years shipping production software for real clients. I work at the intersection of ERP integration, multi-tenant SaaS architecture and enterprise middleware — the surface where a bug means broken invoicing, not a red toast.
I've built bidirectional sync engines between SAGE 300 and government-facing portals, multi-tenant architectures with strict per-client data isolation, complex payment integrations, and AI-augmented internal tools that cut weekly headcount-hours. I run discovery directly with stakeholders, scope, and deliver.
I measure my work in automated operations, errors eliminated and processes that no longer need human attention — not in lines of code shipped.
Core stack
Open to new opportunities
Available for scoped freelance engagements and long-term collaborations. Part-time or full-time.
Where I add value
Specializations backed by production case studies.
ERP Middleware Integration
I connect SAGE 300 and Odoo with supplier portals, fiscal gateways and legacy systems. Invoices, purchase orders and payments flow without human intervention.
Multi-tenant SaaS Architecture
Platforms where N companies operate on isolated data over the same infrastructure. Stripe Webhooks, real-time booking, roles and analytics from the very first tenant.
Cross-system API Integration
I orchestrate systems speaking different protocols — XML, REST, OAuth2, XML-RPC — into transactional flows that don't lose atomicity or collide on webhooks.
AI-augmented Internal Tools
Applications that replace repetitive manual processes: Gemini AI-powered quoters that read PDF requirements, generate documents and write auditable history.
Custom Web Applications
Operational dashboards, internal portals and management systems designed around the actual business process — from discovery to deploy.
What I've shipped in production
Real case studies, documented stack and verifiable metrics.
Car Rental Platform
Cardeal
End-to-end car rental platform that turned a fully offline operation (phone-based quotes, manual payments, paper confirmations) into a self-service online flow. Orchestrates three parallel external integrations on Next.js 15 + MongoDB.
ERP Automation · Multi-tenant
SageConnect
Bidirectional sync engine between SAGE 300 ERP and the Suppliers Portal (Focaltec) that eliminated manual entry across the full lifecycle of e-invoices, purchase orders, payments and payment complements. Multi-tenant architecture: multiple companies operate in parallel with fully isolated data.
SaaS Platform · Live in production
Cleany SaaS
Multi-tenant SaaS live in production (cleany.pro) for residential and commercial cleaning agencies in Mexico: strict per-tenant data isolation, real-time booking and route tracking, recurring and one-off payments via Stripe Webhooks, WhatsApp and email automation, and operational analytics — Next.js 15 + Fastify + PostgreSQL + Docker.
Business Tools · ERP · AI
Tersoft Quoter
Internal tool that compressed the quote-to-customer cycle from 45 minutes to under 5 by integrating Odoo XML-RPC, Gemini AI, jsPDF, Google Sheets API and Nodemailer. Today it's the backbone of the sales team's commercial flow.
Odoo · Custom Modules
Innova
Custom Odoo modules built on the company's real operational flow: sales, accounting and inventory automated end-to-end, with requirements discovery handled directly with stakeholders.
Odoo · Custom Modules
Belle & Health
Custom Odoo modules for a high-throughput clinical operation: inventory traceability, receiving and bulk load, automated reconciliation — eliminating bottlenecks in a business with intensive operational volume.
HealthTech · Operations Panel
Biomotion · Clinical Dashboard
Multi-role operations panel for Clínica Integral Biomotion (Cuautla, Morelos): patients, doctors, scheduling, consultations, medical records, pharmacy POS, inventory and medication catalog — unifying the entire daily flow in a single system.
HealthTech · Landing
Biomotion · Landing
Public site for Clínica Integral Biomotion: rehabilitation, physical therapy, medical care, nutrition, psychology, cosmetology and dentistry in Cuautla, Morelos. Editorial identity, persistent WhatsApp CTA, reusable appointment modal and PHP endpoint for radiology reports.
FitTech · Landing + Admin
A&D Fitness Center
Full platform for a gym in Huitzuco, Guerrero: public acquisition landing + admin dashboard with clients, pyramidal routines (% 1RM), diets using the Mexican equivalents system, monthly billing, body assessments and longitudinal progress tracking.
ERP · Auto Workshop
Pegasus — Workshop OS
Internal ERP/CRM for Mantenimiento Automotriz Profesional (Huitzuco, Guerrero): service orders with a state machine, monthly atomic folio, parts and services catalogs, customer and vehicle management, PDF generation and immutable activity log. Stack: Next.js 14 + Prisma + Supabase.
Technical stack
Tools I run in production — from client to server.
Professional track record
Real case studies with measurable impact.
Full-Stack Developer
- Built 15+ custom deliveries for clients across manufacturing, distribution, professional services, retail, construction, agribusiness, logistics and healthcare — from discovery to delivery.
- Built SageConnect: SAGE 300 ↔ Focaltec automation engine that eliminated manual reconciliation of e-invoices and POs (−95% recurring operational work).
- Verticalized Odoo (SaaS / Odoo.sh) across Sales, Accounting, Inventory, CRM and Projects with integrations that cut client-side operational time by up to −30%.
- Built an internal quoter with dynamic multi-currency pricing and automatic PDF generation, compressing the sales cycle.
- Standardized the Odoo.sh deploy pipeline for new-client onboarding, cutting implementation from weeks to days.
Web Developer
- Built an electronic invoicing system (CFDI) on React that eliminated manual invoicing errors by centralizing receipt generation.
- Centralized billing data to enable real-time reporting for the administrative team.
- Migrated operational flows from Excel to a web interface, accelerating processing for the accounting team.
B.Eng. in Software Development & Management
Universidad Tecnológica Emiliano Zapata (UTEZ)
Morelos, Mexico
Engineering program focused on professional software development: analysis, design, implementation, testing and production deployment.
- Full-stack training: from algorithm to deploy — frontend, backend, data, DevOps and security.
- Team capstone projects using agile methodologies (Scrum), collaborative version control and iterative delivery.
- Emphasis on systems architecture, design patterns, data modeling and scalable REST APIs.
- Applied cybersecurity work: vulnerability analysis, OWASP Top 10 and hardening — extended on my own into binary analysis and reverse engineering on iOS with Ghidra.
Curriculum areas
Foundations
- Algorithms & Data Structures
- OOP
- Programming Logic
- Discrete Math
- Design Patterns
Frontend & UI/UX
- HTML / CSS / JS
- React
- UI/UX Design
- Figma
- Web Accessibility
- Responsive Design
Backend & APIs
- Node.js
- Java / Spring Boot
- Python
- REST APIs
- Software Architecture
- Microservices
Databases
- MySQL
- SQL Server
- MongoDB
- E-R Modeling
- DB Administration
- Query Optimization
DevOps & Cloud
- Git / GitHub
- Linux
- Docker
- AWS (foundations)
- CI/CD
- Networks & Protocols
Security
- Cybersecurity
- OWASP Top 10
- Vulnerability Analysis
- Cryptography
- API Security
Got a project in mind?
Tell me the problem and the scope — I reply within 24 h.
Available for scoped freelance engagements and long-term collaborations. I reply within 24 h.