Open to opportunities

Daniel Freitas

@danielfreitas1

Senior software engineer specializing in scalable backend systems, performance optimization, and AI-enabled enterprise platforms.

Brazil

Message

What I'm looking for

I’m looking to build scalable, maintainable enterprise systems—owning backend performance, distributed architecture, and AI-enabled workflows—while collaborating in remote, cross-functional teams with strong engineering rigor and mentorship.

I’m a Senior Software Engineer with 10+ years of experience building enterprise-grade systems across Python3, Java, Rust, TypeScript, and Go. I focus on debugging complex codebases, performance optimization, and refactoring large-scale distributed systems to keep them maintainable and production-ready.

In my recent role, I built backend services using Python3 and Go, implementing REST APIs and microservices for internal USA workflows and AI pipelines. I optimized query performance across distributed PostgreSQL clusters serving 10+ million daily requests, and I integrated OpenAI API and LangChain to deliver data preprocessing and workflow automation while advising on LLM inference architecture.

I also build end-to-end experiences by developing React and TypeScript frontend applications with strong testing practices (95% test coverage using Jest and Cypress). I’ve implemented event-driven messaging and caching with RabbitMQ and Redis, reduced latency by 40% through algorithm-level optimizations, and led code reviews while mentoring 6 mid-level engineers on architecture, debugging, and scalable engineering practices.

Experience

Work history, roles, and key accomplishments

Current

Senior Software Engineer

Current

Studocu

Aug 2023 - Present (2 years 10 months)

Built backend microservices in Python3 and Go, implementing REST APIs and AI pipelines for internal workflows. Optimized distributed PostgreSQL query performance to support 10+ million daily requests and integrated OpenAI/LangChain workflows, reducing latency by 40% via data-processing improvements.

Python 3 Go REST APIs Microservices PostgreSQL OpenAI API Lang Chain React TypeScript AWS

FullStack Engineer

Xurge Digital Lab LLC

Apr 2020 - Jul 2023 (3 years 3 months)

Developed enterprise backend services with Java Spring Boot and Node.js, including REST APIs, asynchronous tasks, and microservices for a distributed engineering team. Improved PostgreSQL performance by 35% through schema and indexing strategies and implemented secure RBAC/auth flows with React/Angular frontends.

Java Spring Boot REST APIs Microservices PostgreSQL MongoDB React Angular RBAC CI CD

FullStack Developer

Analista Desenvolvedor SR

Jul 2016 - Mar 2020 (3 years 8 months)

Built backend functionality with ASP.NET Core, PHP, and Node.js, creating REST APIs for distributed Brazil workflows and resolving complex production issues. Optimized MySQL databases with efficient queries and indexing, and contributed to authentication/security improvements within a 12-person engineering team.