Open to opportunities

Fernando Henrique Lotti

@fernandohenriquelott

Message

I build resilient backend systems, distributed architectures, and secure AI application pipelines.

Brazil

Message

What I'm looking for

I'm looking to contribute to robust, secure, highly observable environments that combine performance with reliability, especially in backend architecture, DevOps, automation, applied AI/RAG, and LLM security.

At Deal, I lead backend development for a distributed receivables-advance project, integrating core services with the corporate messaging bus and building multi-tenant data access in .NET and PostgreSQL.

I've implemented RabbitMQ flows for financial pre- and post-processing, standardized message contracts, retries, DLQs, and structured logs, and supported operations with Docker and Kubernetes. I contribute to architecture decisions, code reviews, mentoring, safe concurrency, idempotency, and observability.

Previously at Ploomes, I was promoted to Senior Backend Developer to lead critical projects during a technical restructuring. I stabilized unreliable modules, redesigned .NET, RabbitMQ, and Redis integrations, improved documentation, and reduced production failures by 60% through stronger test coverage.

I'm also researching applied AI systems, building modular Python RAG pipelines with FAISS, Anthropic Claude, evaluation suites, rigorous CI, and security controls against prompt injection.

Experience

Work history, roles, and key accomplishments

Current

Especialista Tecnico / Senior Backend Developer

Current

Deal

Oct 2025 - Present (10 months)

Led the technical front of a receivables anticipation project in distributed architecture, integrating the main service with the corporate messaging bus and structuring multi-tenant data access. Implemented complete message broker integration, standardized contracts, retry policies, DLQ handling, and structured logs, increasing system resilience and traceability.

.NET C#ASP.NET Core PostgreSQL RabbitMQ REST APIs Distributed Architecture Docker Kubernetes K9s CI CD Structured Logging Systems

Current

Desenvolvedor Backend / Pesquisa & Desenvolvimento

Current

Laboratorios

May 2025 - Present (1 year 3 months)

Personal R&D project focusing on backend engineering for applied AI systems, with emphasis on RAG pipelines and security in LLM-based applications. Built a modular RAG pipeline from scratch and a RAG evaluation suite with versioned baseline and ADRs.

Python RAG LLM Anthropic: Claude Faiss Sentence Transformers Clean Architecture Pydantic Loguru Pytest Ruff Pyright UV развертка GitHub Actions ADR SAST

Desenvolvedor Backend Senior

Ploomes

Aug 2024 - Apr 2025 (8 months)

Promoted to Senior to lead critical projects during a technical restructuring. Acted as backend architecture reference, stabilized unstable modules, improved missing documentation, and supported system evolution in production under pressure. Redesigned flows and integrations with .NET, RabbitMQ, and Redis, increasing test coverage and reducing production failures by 60%.

Event Driven Architecture MongoDB Microsoft SQL Server Docker Grafana Kubernetes Datadog .NET Core Redis Clean Architecture RabbitMQ Unit Testing

Desenvolvedor Backend Pleno

Ploomes

Jun 2023 - Aug 2024 (1 year 2 months)

Participated in a strategic data lake project focusing on scalability, reliability, and performance. Developed data pipelines with MongoDB, RabbitMQ, and SQL Server, implemented robust microservices with .NET Core, and promoted DevOps practices with a focus on performance and traceability.

Event Driven Architecture MongoDB Microsoft SQL Server Python Docker Kubernetes Datadog ASP.NET Core Redis Clean Architecture RabbitMQ Unit Testing

Desenvolvedor FullStack

Benner

Nov 2022 - Jun 2023 (7 months)

Acted as technical lead in healthcare projects, coordinating backend initiatives focused on reliability and system integration. Led a team in critical deliveries for medical systems interoperability, supervised the development lifecycle from specification to testing and deployment, and utilized .NET and Oracle for complex integrations with third-party systems.

JavaScript C#ASP.NET MVC Pl SQL .NET Core ASP.NET Core

Desenvolvedor Mobile/Backend

LaundryApp

Feb 2022 - Nov 2022 (9 months)

Responsible for developing and evolving cross-platform mobile solutions and backend APIs in .NET and PHP. Developed Xamarin applications for field operations, implemented robust RESTful APIs with authentication, security, and performance, and optimized internal processes with automations and integrations with ERP and databases.

C#Xamarin PHP .NET Core ASP.NET Core MySQL Unit Testing