Héctor Güiza

I'm Héctor Güiza
Fullstack Engineer

I build web applications with Python, FastAPI, TypeScript, and Next.js. My work spans backend architecture, data engineering, serverless applications, and AI-powered experiences.

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Experience & Education

Professional experience building web applications, improving architecture, and turning data into useful tools.

PiTransform

Full Stack Developer

2025 - Present

Remote work for a US company, building web applications and AI-powered experiences.

  • Built an AI agent platform with a Python/FastAPI backend and a Next.js/TypeScript frontend.
  • Contributed to application architecture improvements, achieving serverless cold starts under 2 seconds.
  • Decoupled heavy background processing through an event-driven architecture and validated application stability with high-concurrency Gatling load tests.
  • Implemented talking avatars with viseme-driven lip synchronization, without paid avatar animation services.
  • Automated infrastructure provisioning with Azure Bicep for consistent, repeatable environments.

Innovati Software

Full Stack Developer & Data Engineer

2024 - 2025

Software architecture, data engineering, and process automation in Medellín, Colombia.

  • Designed reference architecture with the C4 Model for Microsoft Fabric and Power Platform solutions, aligning decisions with architecture board and stakeholder requirements.
  • Processed millions of public purchase and sales records and internal transactions for budgeting and operational analysis.
  • Reduced budget preparation time by 75% through data processing and automation.

Universidad de Antioquia

Systems Engineering

Expected 2026

Focus areas include software architecture, data engineering, full stack development, AI systems, and process automation.

Technical Expertise

Full stack engineering backed by experience in APIs, data pipelines, serverless architecture, and performance testing.

How I Work

01/ 03

Spec-Driven Development

I turn requirements into clear specifications, so expected behavior, constraints, and acceptance criteria guide each implementation decision.

Full Stack Development

TypeScript, Next.js, FastAPI

Full Stack Development

Built AI-powered web applications at PiTransform, connecting Next.js and TypeScript interfaces to Python/FastAPI backends and REST APIs.

Next.jsTypeScriptPythonFastAPIREST APIs

Data Engineering

SQL, pipelines, Microsoft Fabric

Data Engineering

Processed millions of transaction records at Innovati Software for budgeting and operational analysis, helping reduce budget preparation time by 75%.

SQLMicrosoft FabricPostgreSQLData pipelines

Software Architecture

Serverless, events, C4 Model

Software Architecture

Contributed to serverless architecture improvements with cold starts under 2 seconds. Decoupled heavy background processing using an event-driven architecture.

ServerlessEvent-driven architectureMicroservicesC4 Model

AI & Interactive Avatars

AI agents, visemes, lip sync

AI & Interactive Avatars

Implemented talking avatars with viseme-driven lip synchronization, without paid avatar animation services. Built AI agent applications with Python and FastAPI.

AI agentsVisemesLip syncPythonFastAPI

Cloud & DevOps

Azure, Bicep, infrastructure as code

Cloud & DevOps

Automated Azure infrastructure provisioning with Bicep to keep environments consistent and deployments repeatable, alongside experience with Docker and CI/CD.

AzureAzure BicepDockerCI/CD

Performance Testing

Gatling, load testing, concurrency

Performance Testing

Designed and ran high-concurrency Gatling load tests to validate application stability under traffic spikes and support performance-focused engineering decisions.

GatlingLoad testingConcurrencyPerformance

Selected Projects

From conversational AI characters to interactive storytelling: projects I build across web and mobile.

Syntelle

Syntelle

A voice-first AI experience with expressive characters. Speak naturally, interrupt replies, and customize expressions and movement while following the conversation in a live transcript.

Vue.jsGoFastAPIWebRTC
HistorIA — Starship Centaurus

HistorIA — Starship Centaurus

Sci-fi narrative investigation game for Android. Identify a traitor among the crew before the starship fails. Hybrid FSM + LLM engine with deterministic simulation and dynamic Gemini-powered storytelling.

KotlinJetpack ComposeGemini AIRoom DB
2026 All Rights Reserved. Héctor Güiza