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John Portus

@johnportus

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Senior Full-Stack Developer building AI automation and agent systems with Node.js, Go, Python, and AWS.

Philippines

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What I'm looking for

I want to keep building backend-to-frontend products and AI automation—designing microservices, deploying on AWS, and shipping AI agents and GenAI features that reliably run in production.

I build full-stack systems that connect frontend and backend—most recently at Hoopit.ai, where I streamlined AI automation workflows with LangChain and custom orchestration.

I’ve also engineered autonomous AI agents and GenAI-powered chatbots using GPT-4, Claude, and Falcon, wiring them into Python/Node.js microservices and scaling pipelines with AWS Bedrock, Lambda, and DynamoDB.

Earlier roles included designing ML models for healthcare compliance at Nexus MD in Melbourne and maintaining backend APIs in Go and Python for product platforms, including AWS EC2 deployments, RESTful/microservice design, and production monitoring.

Experience

Work history, roles, and key accomplishments

Senior Full Stack & AI Automation Developer

Hoopit.ai

Jan 2025 - Aug 2025 (7 months)

Streamlined AI automation workflows using LangChain and custom orchestration to enhance enterprise processes. Engineered autonomous AI agents for customer support and operations, reducing manual workload by 35%.

Lang Chain AI Agents GPT 4 Claude Falcon Python AWS Lambda Automation

AI Engineer

Nexus MD

Apr 2023 - Oct 2024 (1 year 6 months)

Designed and executed machine learning models for healthcare compliance and documentation automation. Enhanced emergency department workflows using AI agents, improving performance by 30%.

Machine Learning AI Agents data preprocessing Feature Engineering Clinical Data Analysis Clinical Data Python

Back End Developer & ML Developer

Calm

Jan 2022 - Dec 2022 (11 months)

Engineered scalable backend systems using Go, TypeScript, Docker, Kubernetes, and AWS/GCP to support Calm's mobile and web applications. Cooperated with product managers, designers, and QA engineers to gather requirements.

Go TypeScript Docker Kubernetes AWS GCP Microservices SQL Monitoring

Full Stack Developer

Rackspace Technology

Jun 2020 - Dec 2021 (1 year 6 months)

Created APIs to provide financial data to frontend applications, speeding up data delivery by 30%. Engineered backend APIs in Python and Node.js for cloud-based marketing systems.

Python Node AWS CI CD GraphQL

Backend Developer

White Widget

Jul 2019 - Apr 2020 (9 months)

Developed and maintained backend APIs using Python and Node.js, ensuring high performance and scalability for production applications. Managed Python backend services on AWS EC2 to support mission-critical operations.

Python Node EC2 MongoDB SQL GraphQL