Full Stack Software Engineer with 3 years of professional experience building production financial and payment systems. Currently based in Goiania, Brazil. U.S. citizen, available to work remotely.

Software Engineer at Valori, a Brazilian payment processing fintech, where I design and ship production microservices and web applications handling real financial transactions daily. Final year of a B.Sc. in Computer Science at Universidade Federal de Goias (top 11 in Brazil, SCImago 2022). Expected graduation: December 2026.

My work centers on backend systems in C# and .NET, REST APIs, and frontend development with TypeScript and React. I have hands-on experience with automated payment pipelines, billing systems, and cloud-hosted microservices on Azure. More recently I have been building generative-AI and multi-agent systems in Python. Before Valori, I worked as a developer at Level 5, my university's junior enterprise, where I built the company website still in use today.

Backend: C#, .NET, Java, Spring Boot, Entity Framework, Dapper, REST APIs, Clean Architecture, Python

Frontend: TypeScript, React, Next.js, JavaScript, Tailwind CSS, HTML5, CSS3

Mobile: Flutter, Dart, Riverpod

AI / GenAI: Anthropic Claude, Multi-Agent Systems, LLM Pipelines, Prompt Engineering

Databases: SQL Server (T-SQL, stored procedures), PostgreSQL, MongoDB

Cloud & DevOps: Azure, Docker, Azure DevOps, CI/CD, Git, AWS

Data: Apache Spark, Pandas, NumPy

Undergraduate thesis (TCC). A multi-agent generative-AI system in Python that turns a raw stakeholder-meeting recording into formal software-requirements documentation end-to-end: transcription → personas and INVEST user stories → an IEEE 830 SRS → a domain diagram. Four specialized Claude agents (Haiku and Sonnet) coordinate over a file-based contract, with Groq Whisper speech-to-text and a reproducible evaluation harness. Processes a full 1h38m meeting for roughly US$0.72 in about 11 minutes. Companion paper accepted at the 1st Workshop on Software Engineering for Agentic Systems (SE4AS), co-located with CBSoft 2026.

Full-stack personal finance platform built as a monorepo: an ASP.NET Core 9 REST API (layered architecture, EF Core, PostgreSQL, JWT with refresh-token rotation, FluentValidation, background workers, Docker), a Flutter mobile client (Riverpod, GoRouter, Dio), and a Next.js 16 / React 19 web app featuring budgets, investments, live market data, and financial simulators.

Benchmarking distributed vs. single-machine data processing with Apache Spark on a multi-node AWS EC2 cluster. Implemented in Python, Pandas, and NumPy.

• Built the Centralized Payment System (SLC): an automated pipeline that extracts transaction records, transforms them into structured payment files, and delivers them via Azure Blob Storage and SFTP to the payment processor; replaced a 5-hour daily manual process
• Built the Billing Management System (GCB) as sole developer, automating charge calculation and chargeback processing across multiple billing categories
• Developed customer-facing portal features in TypeScript and React for a platform used by clients and internal operations teams

• Email: gabriellfsg00@gmail.com
• LinkedIn: linkedin.com/in/gabriel-ferreira-silva-3932b2210