Simera Professional Key (SPK)

Sebastian H

Guatemala

Web developer

$ 2,700/month

3 yrs exp

I'm Sebastián Huertas, a Full Stack Developer and AI Engineer based in Guatemala, currently finishing my Computer Science Engineering degree at Universidad del Valle de Guatemala. I have over three years of production experience building backend systems, AI agent architectures, multi-tenant SaaS platforms and cloud infrastructure. I'm most at home owning complex problems end to end, from architecture decisions and database design to deployment and monitoring in production. Outside of work I pla…

Skills

  • Agile
  • AWS
  • CI/CD
  • Docker
  • Git
  • GitHub
  • Grafana
  • JavaScript
  • MongoDB
  • MySQL
  • Network & Security
  • Network Security
  • PHP
  • PostgreSQL
  • Python
  • React
  • Ruby On Rails
  • System Architecture
  • Typescript
  • JavaScript ES6
  • .NET
  • C#
  • CRM Software
  • Figma
  • Laravel
  • Phyton
  • ReactJS
  • VertexAI
  • Payment Processing
  • Typography
  • Python/R
  • Compliance
  • Security Auditing
  • Cryptography
  • WebSockets
  • CICD
  • ortography
  • Python3
  • Google Cloud Platform (GCP)
  • Prompt engineering
  • Stakeholder Communication
  • Large Language Models
  • Nuxt.js
  • Agile methodologies (SCRUM, Kanban)
  • Paython
  • Nest.js
  • Next.js
  • stakholder communication
  • Relational Databases
  • Next js
  • Identity Verification
  • GitHub Actions
  • Strapi CMS
  • Copilot
  • ChatGPT Prompt Engineering
  • Supabase
  • - Stakeholder & Client Communication
  • HR Compliance
  • LLM Engineering
  • MSQL
  • Agentic AI
  • Git Hub
  • LLM integrations (Claude models)
  • Process Engineering
  • SLA Compliance
  • REST API Design
  • Software Architecture

Sebastian H

Guatemala

Web developer

$ 2,700 /month

3 yrs exp

I'm Sebastián Huertas, a Full Stack Developer and AI Engineer based in Guatemala, currently finishing my Computer Science Engineering degree at Universidad del Valle de Guatemala. I have over three years of production experience building backend systems, AI agent architectures, multi-tenant SaaS platforms and cloud infrastructure. I'm most at home owning complex problems end to end, from architecture decisions and database design to deployment and monitoring in production. Outside of work I pla…

Skills

  • Agile
  • AWS
  • CI/CD
  • Docker
  • Git
  • GitHub
  • Grafana
  • JavaScript
  • MongoDB
  • MySQL
  • Network & Security
  • Network Security
  • PHP
  • PostgreSQL
  • Python
  • React
  • Ruby On Rails
  • System Architecture
  • Typescript
  • JavaScript ES6
  • .NET
  • C#
  • CRM Software
  • Figma
  • Laravel
  • Phyton
  • ReactJS
  • VertexAI
  • Payment Processing
  • Typography
  • Python/R
  • Compliance
  • Security Auditing
  • Cryptography
  • WebSockets
  • CICD
  • ortography
  • Python3
  • Google Cloud Platform (GCP)
  • Prompt engineering
  • Stakeholder Communication
  • Large Language Models
  • Nuxt.js
  • Agile methodologies (SCRUM, Kanban)
  • Paython
  • Nest.js
  • Next.js
  • stakholder communication
  • Relational Databases
  • Next js
  • Identity Verification
  • GitHub Actions
  • Strapi CMS
  • Copilot
  • ChatGPT Prompt Engineering
  • Supabase
  • - Stakeholder & Client Communication
  • HR Compliance
  • LLM Engineering
  • MSQL
  • Agentic AI
  • Git Hub
  • LLM integrations (Claude models)
  • Process Engineering
  • SLA Compliance
  • REST API Design
  • Software Architecture

Web developer

Daylight Studio
May 2026 - present

Web Developer and SEO Specialist at Daylight Studio, a photography and production company based in New York City. Working as a remote contractor developing and maintaining web solutions using React and TypeScript, and Lovable for smaller-scale projects. Implemented SEO and GEO strategies using SEMrush and Google Analytics, increasing site visibility by 10%. Grew the AI visibility score from 10 to 26, improving how language models interpret and cite the site's content. Integrated a Chatbase chatbot into the Squarespace CRM and developed backlink and keyword research strategies to strengthen organic search rankings.

Cloud Architecture Designer

CCBank (AWS Online Banking Project)
September 2025 - December 2025

Designed and implemented a secure banking architecture in AWS based on a segmented VPC with a public DMZ and multiple private subnets. Applied PCI DSS-aligned network segmentation separating CDE, application, and data layers. Configured Amazon EC2, encrypted RDS MySQL, IAM roles, Security Groups, and Network ACLs following least-privilege principles. Implemented WAF, reverse proxy, TLS 1.3 encryption, and multi-factor authentication for secure remote VPN access. Centralized monitoring using CloudWatch Logs, VPC Flow Logs, and encrypted S3 storage for compliance and auditing. Designed a defense-in-depth architecture including NAT, Bastion Host, subnet isolation, and service hardening.

Full Stack Developer specializing in AI

DRR Innova
June 2025 - March 2026

Architected and deployed full-stack web applications using Next.js and TypeScript, translating Figma designs into production-ready, scalable interfaces. Designed and implemented Retrieval-Augmented Generation (RAG) pipelines integrating Gemini and Qdrant vector database, improving AI agent contextual accuracy and response precision. Built and orchestrated AI agents using OpenRouter, Gemini, GPT-4, and Grok via CopilotKit, deployed on AgentsGT.com for real-time agent interaction and automation. Developed custom AI agent tools including an image processing/generation tool (Gemini 2.0 Flash) and a document editor/creator tool, extending agent capabilities for e-commerce workflows. Engineered e-commerce AI agents that automated customer support, improved product discovery, and increased customer engagement through intelligent interaction flows. Managed scalable content management infrastructure using Strapi CMS, reducing content iteration cycles and enabling flexible, structured updates. Designed and maintained CI/CD pipelines using GitHub Actions for automated deployment on Coolify, reducing deployment friction and human error. Monitored cloud infrastructure and application performance using AWS CloudWatch and Grafana, ensuring system reliability and proactive incident response. Managed PostgreSQL databases via Supabase, handling data modeling and backend integration for production applications. Mentored junior developers on code quality, architecture best practices, and efficient workflows, improving team velocity and output quality.

Web Developer

Fantastech
October 2024 - April 2026

Architected and delivered a multi-tenant SaaS platform with full tenant isolation, including per-tenant custom domains, dynamic e-commerce storefronts, and granular inventory and product visibility management. Implemented secure payment processing via Recurrente, enabling recurring billing across tenants with strict data segregation, non-repudiation audit logs, and real-time session monitoring to ensure compliance and transactional integrity. Engineered an idempotent shopping cart system with race condition handling, ensuring consistent state under concurrent requests and preventing duplicate transactions at checkout. Built WebSocket-based session isolation per tenant, guaranteeing data privacy and preventing cross-tenant data leakage in real-time interactions. Developed full-stack web applications using React, TypeScript, and Ruby on Rails, delivering scalable and maintainable software solutions across multiple client projects. Designed and optimized relational and NoSQL databases using MySQL and MongoDB, improving query performance, data integrity, and system reliability. Translated Figma designs into pixel-accurate, accessible UI components using shadcn/ui, maintaining design consistency across products. Integrated identity verification workflows using Didit Verification, implementing webhooks and REST API endpoints for automated user validation and regulatory compliance. Contributed to a talent-matching platform connecting employers and candidates, implementing a preference-based matching algorithm to improve candidate-to-role relevance. Built inventory management modules with barcode scanning integration, reducing manual tracking errors and improving stock accuracy.

Backend Developer, Therapist Track

Custom / University Project
January 2024 - December 2024

Designed and structured the MongoDB database architecture using collections and references to ensure scalability and data integrity. Developed RESTful HTTP endpoints in Node.js to manage the full document lifecycle (upload, download, access control). Implemented endpoint protection using role-based validation and security middleware following least-privilege principles. Integrated secure document storage using AWS S3 for persistent and controlled access management. Applied SCRUM methodology to identify security requirements and iteratively improve backend architecture.

AI & Systems Developer (Python Projects)

Custom / University Project
December 2023 - January 2025

Developed an AI model to play Othello by implementing Minimax and Alpha-Beta Pruning algorithms for optimized long-term strategic decision-making. Integrated machine learning techniques to improve model performance over multiple gameplay iterations. Built an MCP-based chatbot in Python focused on conversational model integration. Developed a server in C as part of systems programming coursework, applying concepts of process management, memory handling, and inter-process communication. Applied algorithm optimization principles, data structures, and computational complexity analysis.

Web Developer Junior

TekNovate
November 2023 - May 2024

Developed and maintained backend systems using Laravel and relational databases, delivering secure, maintainable software solutions for production environments. Maintained and extended legacy systems built on .NET and Laravel, ensuring stability, backward compatibility, and incremental improvements without disrupting existing workflows. Implemented Role-Based Access Control (RBAC) for medical forms, restricting data visibility and user actions according to compliance requirements and user role definitions. Served as a technical liaison between development teams and non-technical stakeholders, translating business requirements into technical specifications and communicating project progress clearly. Resolved production incidents and maintained static pages, improving platform stability, usability, and overall user experience.

Smart Scores

Communication
70
Role Fit
95
Adaptability
90
Problem-solving
90

Smart Skills

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