Open to opportunities

Sebastian Henao Erazo

@sebastianhenaoerazo

Message

Backend developer and systems engineer building efficient cloud-based applications.

Colombia

Message

What I'm looking for

I’m looking for backend/AI roles where I can build scalable AWS architectures, ship well-tested APIs, and develop LLM workflows with observability—ideally with a team where I can lead and solve complex challenges.

I’m a backend developer and systems engineer with experience in startups and high-growth environments, focused on developing efficient applications across different architecture types. I’ve built and maintained REST APIs and ETL pipelines with Python and frameworks like FastAPI, Django, Flask, and Scrapy, while troubleshooting incidents and improving system reliability through documentation and testing (Pytest/Unittest).

I lead backend development and scalable AWS architectures (e.g., AWS Lambda, step functions, SQS, ECS, ALB, RDS Aurora) and have worked on integrations with external services like Hubspot and Pipefy. Now, as an Artificial Intelligence Engineer, I’m building LLM workflows for validating and approving financial documents, adding observability (traceloop/distributed tracing), infrastructure as code (terraform), and deploying on AWS EKS.

Experience

Work history, roles, and key accomplishments

Current

Artificial Intelligence Engineer

Current

Simetrik

Nov 2025 - Present (8 months)

Built an LLM workflow to process financial documents for validating and approving certifications, including inference and analysis via an LLM API. Implemented an Airflow-based workflow with rate-limit handling, added observability with Traceloop/distributed tracing, deployed infrastructure on AWS EKS using Terraform, stored interaction history in DocumentDB, and developed supporting backend micro-

LLM APIs Airflow Token Bucket Algorithm Terraform Infrastructure as Code DocumentDB Kubernetes Observability

Senior Backend Developer

Simetrik

Nov 2023 - Nov 2025 (2 years)

Maintained, developed, and deployed FastAPI backend services and built CI/CD pipelines using AWS CodeBuild. Developed REST APIs with AWS Lambda and supported AI-enabled backend systems including LLM/RAG pipelines, using tools and vector storage components such as ChromaDB, pg_vector, MongoDB Atlas, and Mem0.

fastAPI AWS CodeBuild AWS Lambda REST APIs LLM Pytest Python PostgreSQL Docker Bitbucket LangGraph RAG ChromaDB MongoDB Atlas Mem0 AutoGen Chunking

Lead Backend Developer

TruckClub

Nov 2024 - Jun 2025 (7 months)

Led backend development for trucks management, implementing product architecture in AWS and using FastAPI with Python. Implemented supporting infrastructure and integrations (ECS, CodeBuild, ALB, Route 53, RDS Aurora PostgreSQL, AirTable, Firebase, and GraphQL) and applied hexagonal architecture and Unit of Work patterns while leading a team of 4 developers.

Python fastAPI AWS CodeBuild AWS ECS Airtable Firebase ALB GraphQL Hexagonal Architecture Unit Of Work

Backend Developer

Habi

Jun 2022 - Nov 2023 (1 year 5 months)

Implemented BPMN and DMN model integrations using Kogito and Drools and developed APIs with integrations to external services such as HubSpot and Pipefy. Built serverless architectures on AWS (Lambda, Step Functions, SQS) and implemented unit tests, custom SQL queries, reports, and data processing automation in Python.

DMN Modeling Drools API Development HubSpot Pipefy Serverless AWS Step Functions AWS Lambda Python Unit Testing Pytest SQL Data Processing Automation Gitlab

Developer

Tata Consultancy Services

Oct 2021 - Jun 2022 (8 months)

Developed APIs using Python and Scrapy to perform web scraping based on client requirements. Cleaned and extracted data with Python, implemented unit tests with Pytest/Unittest, documented APIs, and supported Scrum methodology and API quality metric evaluation.

Python Scrapy Web Scraping API Development Data Extraction Data Cleaning Unit Testing Pytest Scrum API Documentation

Backend Developer

PCA Ingeniería

May 2021 - Oct 2021 (5 months)

Developed APIs using Django REST Framework and implemented features using Python with Django/Flask. Built real-time functionality with WebSockets and contributed to a video calling service based on Jitsi Meet, using Docker and custom SQL queries.

Django REST Framework Python PostgreSQL Django Flask WebSockets Vue.Js Gitlab Docker Compose SQL Jitsi Meet Trello Jira

Development Analyst

GrupoBit

Feb 2020 - May 2021 (1 year 3 months)

Responded to system requests and incidents within established times, documented resolution processes, and troubleshot issues related to the Scrapy framework. Performed ETL development and SQL query work, and provided technical support for applications and Linux server maintenance.