Looking for a job

Gustavo Lima

@gustavolima1

Senior backend software engineer at Havan who redesigned its RabbitMQ notification system, reducing response latency by 93%.

Brazil

Message

At Havan, I led the redesign of a customer notification system, replacing synchronous URL-shortening calls with an asynchronous RabbitMQ architecture and .NET worker. The change reduced response latency from 30 seconds to 2 seconds.

I also built a scheduled .NET worker to reconcile overdue customer records, increasing payment recovery by 30%, and rebuilt a cargo management system in .NET and PostgreSQL, reducing registration time by about 70%. At Cognizant, I refactored a customer data search and analysis product from .NET Framework 2 to .NET Core and JavaScript, and built a Python virtual receptionist that routed visitors through WhatsApp. I'm currently building WhatsAppPlatform, a multi-tenant messaging platform using .NET, DynamoDB, and Kubernetes.

Experience

Work history, roles, and key accomplishments

Software Engineer

Havan

Apr 2021 - Jul 2026 (5 years 3 months)

Led redesign of a company-wide customer notification system, migrating to an asynchronous architecture using RabbitMQ and a .NET worker, reducing latency by 93%. Designed and built a scheduled .NET worker for reconciling overdue customer records, increasing payment recovery by 30%.

C# .NET RabbitMQ DDD SOLID Test Driven Development PostgreSQL xUnit AWS Kubernetes

Software Engineer

Cognizant

Dec 2018 - Apr 2021 (2 years 4 months)

Planned and executed architecture refactor of a core customer data search product, migrating from .NET Framework 2 and jQuery to .NET Core and JavaScript, cutting service-call time by 60%. Mentored two junior developers and built an AI-powered virtual receptionist in Python and Selenium.

C# .NET JavaScript SOLID DDD Python Selenium ORM

Education

Degrees, certifications, and relevant coursework

Universidade Nove de Julho (UNINOVE)

Bachelor's, Systems Analysis and Development

Bachelor's degree in Systems Analysis and Development, covering full-stack software development including object-oriented programming, software engineering, databases, web development, computer architecture, cloud computing, big data, and cybersecurity.