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Cristian Ahumada

@cristianahumada

Backend and AI engineer at antonIA building enterprise conversational AI, agent workflows, and secure AWS infrastructure.

Chile

Message

At antonIA Enterprise, I build and operate a conversational AI platform, including production workflows with AWS Bedrock, OpenAI/OpenRouter, agent execution, and knowledge-backed retrieval. I also developed customer-facing WhatsApp automation and backend capabilities for agents and knowledge bases.

At antonIA, I designed and operated AWS infrastructure and implemented multi-tenant security controls. I closed Teva’s second penetration-test round by coordinating fixes across application, AI, and infrastructure findings; a credential rotation took seven minutes without data loss or prolonged downtime.

Experience

Work history, roles, and key accomplishments

Current

AI Platform, Backend & Cloud Engineer

Current

antonIA Enterprise

Sep 2026 - Present (2 months)

Build and operate antonIA's conversational AI platform across AI runtime and backend services, agent/knowledge workflows, AWS architecture, integrations, deployment reliability, and security for enterprise environments including Teva.

AWS OpenAI OpenRouter RAG Agentic Workflows AWS ECS Fargate ECR ALB Cognito IAM Secrets Manager Amazon RDS For PostgreSQL S3 Amazon SQS Cloudwatch VPC NAT Terraform GitHub Actions OIDC JWT HMAC Pytest Ruff

Current

Backend & AI Engineer

Current

We Lived It Through Toptal

Apr 2025 - Present (1 year 7 months)

Developed backend and AI services for a community moderation platform focused on hate and extreme speech detection.

Playwright OpenAI Ollama Transformers API Development Dashboard Development

Data / Backend Engineer

Arya Health Through Toptal

Dec 2025 - Mar 2026 (3 months)

Built and maintained Python/Dagster data pipelines for multi-customer EMR integrations in home healthcare.

Python Dagster SQLAlchemy Alembic Pydantic PostgreSQL Docker LocalStack AWS Playwright

Backend Engineer

Solunegocios (for Entel)

Jul 2024 - Oct 2025 (1 year 3 months)

Designed and implemented Django models, serializers, views, GraphQL APIs, Celery workflows, authentication, GCP integrations, and messaging integrations with WhatsApp and Telegram.

Django GraphQL Celery GCP WhatsApp Telegram Docker Compose

Full Stack Developer

Universidad de Chile

Jan 2023 - Mar 2024 (1 year 2 months)

Built a Mapuzugun learning/community MVP with Flask, SQLAlchemy/MySQL, JWT, Socket.IO, React/Next.js, and MUI; implemented quizzes, forums, chats, and deployment on PythonAnywhere/Cloudflare.

Flask SQLAlchemy MySQL JWT Socket.IO React Next.js MUI PythonAnywhere Cloudflare

Backend Engineer

Rentapp

Jun 2023 - Oct 2023 (4 months)

Built automated parsers and backend workflows for real-estate customer data, property status ingestion, user management, GraphQL queries/mutations, and payment integrations.

GraphQL Backend Development Automation Payment Integration

Data / Backend Engineer

SkyLand

Jan 2021 - Dec 2021 (11 months)

Built web scrapers for dynamic sites, authentication flows, preprocessing scripts, and BigQuery-based data pipelines from acquisition through storage and transformation.

Web Scraping BigQuery PostgreSQL Data Pipelines Geolocation

Engineer

Web Intelligence Center, Universidad de Chile

Sep 2019 - Jan 2021 (1 year 4 months)

Developed Django/Angular-Ionic application features, Python/Flask annotation tooling, and NLP/data-science workflows using web-scraped labor-market data and ESCO-based classification.

Django Angular Ionic Python Flask NLP Data Science Web Scraping

Senior Consultant

Deloitte

Jan 2022 - Present (4 years 10 months)

Developed integration business rules, backend/API/database workflows, Airflow pipelines, Python data-processing scripts, and data-science models across multiple industrial customer projects.

Airflow Python Data Processing Data Science API Development