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Cassio – Python, AI agent development, AWS, experts in Lemon.io

Cassio

From Brazil (UTC-7)flag

AI Engineer|Senior
AI Agent Architect|Senior
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Cassio – Python, AI agent development, AWS

Cassio is a seasoned AI engineer with 9 years of experience specializing in Python, event-driven systems, and AI agent orchestration. He has led end-to-end delivery of LLM-powered applications in regulated FinTech and healthcare domains, demonstrating strong ownership and client-facing communication. His expertise includes LangChain, Kafka, FastAPI, AWS, and multi-provider LLM integration. Cassio is recognized for his mature leadership, product-oriented mindset, and effective technical decision-making.

9 years of commercial experience in
AI
Data analytics
E-learning
Edtech
Fintech
Food and beverages
Food production
Govtech
Healthcare
Healthtech
Machine learning
Public services
Publishing
Scientific research
B2B
B2B2C
Customer support software
Main technologies
Python
8 years
AI agent development
3 years
AWS
7 years
LLM
5 years
AI agent orchestration
1 year
AI telemetry
1 year
MCP
1 year
Additional skills
Datadog
Terraform
Kafka
FastAPI
Databricks
Apache Spark
Scikit-learn
ETL
PostgreSQL
Docker
ElasticSearch
Apache Airflow
MongoDB
LangChain
Web scraping
Django
Prompt engineering
Supabase
AWS Lambda
Microservices
CrewAI
Direct hire
Possible
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Experience Highlights

Forward-Deployed Engineer
Apr 2025 - Ongoing1 year
Project Overview

It's an AI automation platform for healthcare operations.

Project gallery:
Portfolio example for Thoughtful AI by Cassio, Forward-Deployed Engineer
Responsibilities:
  • Designed and shipped AI-powered workflow automations for healthcare operations.
  • Built back-end services and integrations connecting LLM agents, APIs, and customer workflows.
  • Collaborated with clients, product, and engineering to define requirements and deliver production solutions.
  • Improved operational efficiency by automating repetitive manual healthcare processes.
Project Tech stack:
Python
Node.js
PostgreSQL
Supabase
Next.js
FastAPI
LLM
LangChain
AI API integration
API
Docker
AI agent development
AI agent orchestration
AI Software Engineer / Creator
Dec 2025 - Mar 20262 months
Project Overview

Open-source AI-assisted crypto trading platform that combines deterministic trading automation with optional CrewAI-powered advisory agents. I designed and built the system to analyze market data, compute technical indicators, classify market regimes, and manage simulated or live trading decisions through an auditable pipeline.

The project focuses on using AI where it adds judgment and context, while keeping core execution deterministic, traceable, and safe. The system supports agents that can evaluate uncertain market conditions, reason about trading opportunities, and provide structured recommendations, while the main trading flow remains controlled by explicit rules, validation layers, and order lifecycle management.

Project gallery:
Portfolio example for TradingCrew by Cassio, AI Software Engineer / Creator
Portfolio example for TradingCrew by Cassio, AI Software Engineer / Creator
Portfolio example for TradingCrew by Cassio, AI Software Engineer / Creator
Responsibilities:
  • Designed and implemented the platform architecture in Python, including data ingestion, market analysis, strategy execution, and order lifecycle management.
  • Integrated CCXT to retrieve ticker and OHLCV data from multiple crypto exchanges, enabling exchange-agnostic market analysis.
  • Built indicator pipelines for EMA, RSI, Bollinger Bands, MACD, and market regime detection, allowing the system to classify conditions such as trending, ranging, volatile, or unknown markets.
  • Implemented a deterministic execution layer for paper/live trading modes, including order states such as pending, open, partially filled, filled, canceled, and rejected.
  • Added CrewAI-based advisory agents to support decision-making in ambiguous scenarios, separating AI reasoning from critical execution logic to improve auditability and reduce risk.
  • Created configuration-driven strategy behavior, allowing the system to adapt profit targets, fees, precision rules, and trading parameters without hardcoding business logic.
  • Developed a dashboard/UI to inspect trading status, balances, recent orders, agent outputs, and operational state.
  • Focused on practical engineering concerns such as traceability, modularity, fee accuracy, restart resilience, and clear boundaries between automation, AI assistance, and deterministic execution.
Project Tech stack:
Python
Next.js
React
PostgreSQL
Typescript
AWS
GitHub Actions
Claude API
LLM
CrewAI
Senior Software Engineer
Apr 2024 - Aug 20251 year 4 months
Project Overview

It's an event-driven exception management platform for alternative investment operations. The system replaces slow manual triage workflows with Kafka-based event processing, dynamic rule queues, and analyst-facing prioritization tools.

Responsibilities:
  • Built FastAPI services and Kafka pipelines for scalable exception processing.
  • Designed dynamic rule-based queues to prioritize and route operational exceptions.
  • Integrated AWS Lambda consumers with PostgreSQL persistence.
  • Added Datadog observability and Terraform infrastructure automation.
  • Reduced average exception handling time from 15 minutes to 90 seconds.
Project Tech stack:
FastAPI
Kafka
Datadog
Terraform
PostgreSQL
AWS Lambda
AWS
LLM integration
Senior Software Engineer
Nov 2023 - Mar 20244 months
Project Overview

It's a Databricks ETL optimization for enterprise data pipelines (a multinational fast-food holding company).

Responsibilities:
  • Optimized Databricks ETL jobs, reducing runtime by more than 70%.
  • Rebuilt and tested AWS Glue jobs to improve reliability.
  • Improved Spark-based data workflows for scalability and maintainability.
  • Supported Python and scikit-learn data processing workflows.
Project Tech stack:
Databricks
ETL
Apache Spark
Scikit-learn
Python
Tech Lead / Back-end Engineer
Jun 2022 - Nov 20231 year 5 months
Project Overview

It's a personalized learning platform serving language learners across multiple modalities.

Responsibilities:
  • Led a small engineering team delivering personalized learning features.
  • Built back-end APIs and workflows using FastAPI and PostgreSQL.
  • Collaborated with product stakeholders to translate learning goals into technical solutions.
  • Improved AWS infrastructure and CI/CD processes, reducing operational costs.
Project Tech stack:
Next.js
React
AWS
OpenAI API
Docker
PostgreSQL
Python
LLM
LLM integration
AI API integration
API
Microservices
Senior Software Engineer
Jan 2017 - Jun 20225 years 4 months
Project Overview

It's a research infrastructure data platform used by universities and research institutions.

Responsibilities:
  • Migrated legacy Pentaho ETL workflows to Apache Airflow.
  • Built and maintained data pipelines for academic and research infrastructure.
  • Improved search and indexing workflows using Elasticsearch.
  • Added monitoring and observability with Grafana and MongoDB-backed systems.
Project Tech stack:
ElasticSearch
Apache Airflow
ETL
Grafana
MongoDB
Python
API

Education

2022
Computer Science
Ph.D.
2014
Computer Science
M.Sc.

Languages

Portuguese
Advanced
English
Advanced

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