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Junior software developer building and maintaining a live, multi-tenant SaaS with subdomain routing, Supabase (RLS), PostgreSQL, Twilio SMS, and an n8n + AI reply agent. Transitioned from petroleum engineering after relocating to Canada, and has been working since 2025 on production systems and automations. Freelances automation and AI workflow nodes for small client teams, integrating REST APIs, webhooks, scheduling, and persistent data storage. Focused on reliability, cost optimization, and delivering end-to-end results with fast learning and practical problem-solving.…Junior software developer building and maintaining a live, multi-tenant SaaS with subdomain routing, Supabase (RLS), PostgreSQL, Twilio SMS, and an n8n + AI reply agent. Transitioned from petroleum engineering after relocating to Canada, and has been working since 2025 on production systems and automations. Freelances automation and AI workflow nodes for small client teams, integrating REST APIs, webhooks, scheduling, and persistent data storage. Focused on reliability, cost optimization, and delivering end-to-end results with fast learning and practical problem-solving.

Esteban Salazar Correa

Web Developer, Programmer, Software Engineer, +2

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Junior software developer building and maintaining a live, multi-tenant SaaS with subdomain routing, Supabase (RLS), PostgreSQL, Twilio SMS, and an n8n + AI reply agent. Transitioned from petroleum engineering after relocating to Canada, and has been working since 2025 on production systems and automations. Freelances automation and AI workflow nodes for small client teams, integrating REST APIs, webhooks, scheduling, and persistent data storage. Focused on reliability, cost optimization, and delivering end-to-end results with fast learning and practical problem-solving.…Junior software developer building and maintaining a live, multi-tenant SaaS with subdomain routing, Supabase (RLS), PostgreSQL, Twilio SMS, and an n8n + AI reply agent. Transitioned from petroleum engineering after relocating to Canada, and has been working since 2025 on production systems and automations. Freelances automation and AI workflow nodes for small client teams, integrating REST APIs, webhooks, scheduling, and persistent data storage. Focused on reliability, cost optimization, and delivering end-to-end results with fast learning and practical problem-solving.

Available to hire

Junior software developer building and maintaining a live, multi-tenant SaaS with subdomain routing, Supabase (RLS), PostgreSQL, Twilio SMS, and an n8n + AI reply agent. Transitioned from petroleum engineering after relocating to Canada, and has been working since 2025 on production systems and automations.

Freelances automation and AI workflow nodes for small client teams, integrating REST APIs, webhooks, scheduling, and persistent data storage. Focused on reliability, cost optimization, and delivering end-to-end results with fast learning and practical problem-solving.

Skills

Experience Level

Expert

Expert

Expert

Expert

Expert

Expert

Expert

Expert

Expert

Expert

Expert

Expert

Expert

Intermediate

Language

Spanish; Castilian

Fluent

English

Advanced

Work Experience

Automation Developer (Freelance) at Freelance

January 1, 2025 - Present

Designed and deployed end-to-end n8n automation workflows for 3–5 clients integrating REST APIs, webhooks, scheduled jobs, and AI agent nodes to replace manual repetitive tasks. Automated data entry and follow-up steps and reduced a ~2-hour manual task to ~15 minutes per run. Built custom ComfyUI pipelines for AI image generation, chaining multiple models and writing client-specific logic nodes. Integrated third-party services (Twilio, OpenRouter, PostgreSQL) for messaging, AI-generated responses, and persistent data storage. Debugged and optimized existing workflows for reliability and cost by reducing failed runs and unnecessary API calls.

Junior Software Developer / Automation Developer (n8n + Python) at BarberQueue (Live multi-tenant SaaS) / Freelance client work

January 1, 2025 - Present

Built and maintained BarberQueue, a live multi-tenant SaaS with subdomain routing, Supabase RLS, PostgreSQL, Twilio SMS, and an n8n + OpenRouter AI reply agent. Implemented API endpoints, atomic appointment workflows in PostgreSQL transactions, multi-barber scheduling with least-loaded auto-assignment and pricing modifiers, and timezone/date handling. Developed subdomain proxy behaviors for authentication, cookie copying, and page routing across apex and shop subdomains. Added safeguards such as rate limiting and double-booking prevention using a partial unique index in PostgreSQL. Also created system integrations for SMS automations (reminders, review requests, reactivation) and AI-driven messaging workflows.

Web & Communication Volunteer (WordPress) at Volunteer, Web & Communications, Autism Today Foundation

May 1, 2024 - November 1, 2024

Maintained and updated the organization’s WordPress website, ensuring accurate events and program information for the Toronto autism community. Created promotional web content and materials to support outreach for community programs, coordinating with staff on messaging and timelines.

Administrative Assistant at Afriosa S.A.

January 1, 2021 - January 1, 2023

Managed and maintained MySQL databases using MySQL Workbench, ensuring data accuracy across client and inventory records. Provided customer service and support to 100+ clients weekly by resolving inquiries and coordinating with internal teams to meet response-time targets.