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Full-stack engineer with 5+ years building and shipping production SaaS platforms end-to-end, specializing in multi-tenant architectures, role-based access control, and scalable workflows. Strong across React/Next.js and Node.js/PostgreSQL, owning features from database schema to UI and deployment. I’ve architected a workflow platform used by 820+ users across 17 countries and 100+ enterprise clients, and I currently build multi-tenant appointment/CRM-style systems with timezone-aware scheduling, OAuth integrations, payment processing, and AI-powered analytics dashboards.…Full-stack engineer with 5+ years building and shipping production SaaS platforms end-to-end, specializing in multi-tenant architectures, role-based access control, and scalable workflows. Strong across React/Next.js and Node.js/PostgreSQL, owning features from database schema to UI and deployment. I’ve architected a workflow platform used by 820+ users across 17 countries and 100+ enterprise clients, and I currently build multi-tenant appointment/CRM-style systems with timezone-aware scheduling, OAuth integrations, payment processing, and AI-powered analytics dashboards.

Selenia Sanchez

Full Stack Developer, DevOps Developer, Back-End Developer, +3

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Full-stack engineer with 5+ years building and shipping production SaaS platforms end-to-end, specializing in multi-tenant architectures, role-based access control, and scalable workflows. Strong across React/Next.js and Node.js/PostgreSQL, owning features from database schema to UI and deployment. I’ve architected a workflow platform used by 820+ users across 17 countries and 100+ enterprise clients, and I currently build multi-tenant appointment/CRM-style systems with timezone-aware scheduling, OAuth integrations, payment processing, and AI-powered analytics dashboards.…Full-stack engineer with 5+ years building and shipping production SaaS platforms end-to-end, specializing in multi-tenant architectures, role-based access control, and scalable workflows. Strong across React/Next.js and Node.js/PostgreSQL, owning features from database schema to UI and deployment. I’ve architected a workflow platform used by 820+ users across 17 countries and 100+ enterprise clients, and I currently build multi-tenant appointment/CRM-style systems with timezone-aware scheduling, OAuth integrations, payment processing, and AI-powered analytics dashboards.

Available to hire

Full-stack engineer with 5+ years building and shipping production SaaS platforms end-to-end, specializing in multi-tenant architectures, role-based access control, and scalable workflows. Strong across React/Next.js and Node.js/PostgreSQL, owning features from database schema to UI and deployment.

I’ve architected a workflow platform used by 820+ users across 17 countries and 100+ enterprise clients, and I currently build multi-tenant appointment/CRM-style systems with timezone-aware scheduling, OAuth integrations, payment processing, and AI-powered analytics dashboards.

Skills

Experience Level

Expert

Expert

Expert

Expert

Expert

Expert

Expert

Expert

Expert

Expert

Expert

Expert

Intermediate

Intermediate

Intermediate

Intermediate

Intermediate

Intermediate

Beginner

Beginner

Language

English

Advanced

Spanish; Castilian

Fluent

Work Experience

Full-Stack Engineer (Multi-Tenant SaaS) at Aur aDash (Project)

January 1, 2026 - Present

Architected and built a multi-tenant SaaS platform (CRM, inventory, finance, and workflow automation) with RBAC and strict per-tenant data isolation. Engineered conflict-aware, timezone-aware booking/scheduling logic across tenants. Integrated AI natural-language analytics with real-time dashboards, two-way Google Calendar OAuth sync, MercadoPago payments, and bulk Excel/CSV imports. Owned the full stack and deployment pipeline across Render, Vercel, and Neon.

Full-Stack Engineer (Multitenant SaaS) at AuraDash — Multi-Tenant Appointment & Business-Management SaaS

January 1, 2026 - Present

Architected and built a multi-tenant SaaS platform (CRM, inventory, finance, workflow automation) with RBAC and strict per-tenant data isolation. Engineered conflict-aware, time zone-aware booking engines handling complex scheduling logic across tenants. Integrated AI natural-language analytics with real-time dashboards, two-way Google Calendar OAuth synchronization, MercadoPago payments, and bulk Excel/CSV imports. Owned full-stack development and deployment pipeline across Render, Vercel, and Neon.

Full Stack Engineer at Auradash — Multi-Tenant Appointment & Business-Management SaaS

January 1, 2026 - Present

Architected and built a multi-tenant SaaS (CRM, inventory, finance, and workflow automation) with RBAC and full per-tenant data isolation. Engineered conflict-aware, timezone-aware booking logic across tenants. Integrated AI natural-language analytics with real-time dashboards, two-way Google Calendar OAuth sync, MercadoPago payments, and bulk Excel/CSV import. Owned the full-stack and deployment pipeline across Render, Vercel, and Neon.

Developer (Dog-Walking Marketplace) at DogCo (Project)

October 1, 2025 - Present

Building a two-sided marketplace connecting pet owners and dog walkers with authentication, booking flows, and real-time data syncing via Firebase. Designed a role-based (owner/walker) interaction logic for scalable user coordination.

Mobile Developer (Multi-Vendor Marketplace) at Más Repuestos (Project)

October 1, 2025 - March 1, 2026

Built and launched a multi-vendor marketplace app in 4 months connecting buyers, sellers, and delivery drivers. Implemented role-based workflows for search, comparison, purchasing, and delivery. Architected core marketplace systems including product–vendor relationships and purchase flows, and shipped to Google Play with real user transactions (App Store review mentioned).

Developer (Dog-walking marketplace) at DogCo — Dog-Walking Marketplace

October 1, 2025 - Present

Building a two-sided marketplace connecting pet owners and dog walkers with authentication, booking workflows, and real-time data synchronization via Firebase. Designed role-based system (owner/walker) and interaction logic for scalable user coordination.

Developer (Multi-vendor marketplace app) at Más Repuestos — Multi-Vendor Marketplace (Mobile)

October 1, 2025 - March 31, 2026

Built and launched a multi-vendor marketplace app in 4 months connecting buyers, sellers, and delivery drivers with role-based workflows for search, comparison, purchasing, and delivery. Architected core marketplace systems including product-vendor relationships and purchase flows, and shipped to Google Play with real user transactions (app store review feedback).

Developer at DogCo — Dog-Walking Marketplace

October 1, 2025 - Present

Building a two-sided marketplace connecting pet owners and dog walkers with authentication, booking flows, and real-time data syncing via Firebase. Designed role-based (owner/walker) interaction logic for scalable user coordination.

Mobile Developer / Full Stack Developer at Más Repuestos — Multi-Vendor Marketplace (Mobile)

October 1, 2025 - March 31, 2026

Built and launched a multi-vendor marketplace app in 4 months connecting buyers, sellers, and delivery drivers with role-based workflows for searching, comparing, purchasing, and delivery. Architected core marketplace systems (product–vendor relationships and purchase flows) and shipped to Google Play with real user transactions (App Store review).

Developer (Paleontology Excavation Platform) at LACEV / APASUR (Project)

September 1, 2025 - October 1, 2025

Developed a multilingual campaign platform for a national paleontology excavation with dynamic content, modular components, and interactive sections. Supported international visibility for major discoveries, including direct involvement in field excavation activities for new dinosaur species and a best-preserved dinosaur egg.

Developer (Paleontology excavation platform) at LACEV / APASUR — Paleontology Excavation Platform

September 1, 2025 - October 31, 2025

Developed a multilingual campaign platform for a national paleontology excavation with dynamic content, modular components, and interactive sections. Supported international visibility of major discoveries, including direct involvement in field excavation related to notable finds.

Front-End Developer at Lacev / Apasur — Paleontology Excavation Platform

September 1, 2025 - October 31, 2025

Developed a multilingual campaign platform for a national paleontology excavation, with dynamic content, modular components, and interactive sections. Supported international visibility for major discoveries (new dinosaur species and the best-preserved dinosaur egg on record) with direct involvement in field excavation.

Front-End Developer (Workflow Platform) at Sis tran

June 1, 2022 - July 1, 2025

Sole front-end developer for a workflow platform replacing Jira, reaching 100% adoption across 820+ internal users in 17 countries. Drove rapid adoption by rolling the platform out to 100+ enterprise clients in 2 months, eliminating approximately $3K/license fees per client (~$300K+ savings) and enabling new revenue. Built 380+ configurable workflows using dynamic state management and task tracking to support diverse global operational processes. Implemented role-based systems for 9 user types with complex permission handling and improved cross-functional efficiency. Helped architect a scalable multi-tenant React frontend for evolution into a globally adopted SaaS product.

Front-End Developer at Sistran — Enterprise Management Platform

June 1, 2022 - July 31, 2025

Sole front-end developer for a workflow platform replacing Jira, achieving 100% adoption across 820+ internal users in 17 countries. Drove adoption by rolling the platform out to 100+ enterprise clients in 2 months, eliminating ~$3K/license fees per client (~$300K+ savings) and unlocking new revenue. Built 380+ configurable workflows with dynamic state management and task tracking across global teams. Designed role-based systems for 9 user types with complex permissions and improved cross-functional efficiency. Architected a scalable multi-tenant React front-end for ongoing global SaaS evolution.

Front-End Developer (Educational Platform) at Scalabl (Project)

January 1, 2022 - June 1, 2022

Rebuilt the content-consumption experience with a new video player and progress-tracking system, increasing course completion rates by 35% across a platform serving 2,500+ professionals across 50+ countries. Optimized frontend structure and navigation to improve retention and engagement across platform operations.

Front-End Developer at Scalabl — Educational Platform

January 1, 2022 - June 30, 2022

Rebuilt content consumption experience with a new video player and progress-tracking system, increasing course completion rates by 35% across a platform serving 2,500+ professionals in 50+ countries. Optimized front-end structure and navigation to improve retention and engagement across platform operations.