Open to opportunities

Lamunier Costa

@lamuniercosta

Message

Senior backend developer specializing in scalable .NET systems.

Brazil

Message

What I'm looking for

I seek senior backend roles where I can design scalable .NET systems, mentor teams, reduce tech debt, and contribute using strong DevOps and cloud practices in collaborative, growth-focused environments.

I am a senior software developer with 15+ years of experience building backend systems, APIs, and distributed architectures using C# and the .NET platform. I have led design and implementation of production-ready services including document management, AI-driven narrative generation, queue hubs, and audit viewers, and I emphasize SOLID principles, TDD, and maintainability.

I have extensive cloud and DevOps experience across Azure, AWS and GCP, and strong proficiency with databases (SQL Server, MySQL, MongoDB, CosmosDB), containerization, CI/CD and observability. I am results-oriented, mentor-oriented, and driven to remove technical debt while delivering scalable, secure systems for product teams and enterprise clients.

Experience

Work history, roles, and key accomplishments

Current

Software Developer

Current

Valcre Inc.

Aug 2023 - Present (2 years 6 months)

Led design and development of .NET 10 backend services and APIs including document management with data extraction, AI-driven narrative generation integrating third-party LLMs, queue hub using Azure Service Bus/Functions, and an audit-log viewer with GraphQL; improved reliability through testing and CI/CD.

C++Azure Service Bus Azure Functions MongoDB GraphQL Docker xUnit CI CD

Software Developer

Flinks Technology Inc.

Sep 2021 - Jun 2023 (1 year 9 months)

Contributed to microservices development on .NET 7 supporting core platform features, performed tech-debt remediation and system maintenance, and implemented deployments and automation using Docker, Octopus, Argo CD, Redis, and SonarQube.

Net 7 gRPC CosmosDB MongoDB MySQL Docker Argo SonarQube

Software Developer

Pitang Agile IT

Jun 2020 - Sep 2021 (1 year 3 months)

Participated in architecture and implementation of projects for Brazil's energy authority using .NET Core, SQL Server and Kafka; led tech-debt efforts, mentored juniors and ran company-wide code workshops to improve team competency.

.NET Core SQL Server Kafka Docker Azure DevOps Git Mentoring

Senior Software Engineer

Indra

May 2019 - Jun 2020 (1 year 1 month)

Worked as Senior Software Engineer contributing to enterprise software projects and delivering maintainable backend solutions (role listed in CV; specific accomplishments not provided).

C++.NET Backend Development Architecture SQL Git

Software Developer

United Academics

Sep 2017 - Jun 2019 (1 year 9 months)

Developed software solutions as part of the engineering team (role listed in CV; specific accomplishments not provided).

C++.NET Backend Development Git SQL

Head of Development

Grupo Egen

Feb 2011 - Jun 2013 (2 years 4 months)

Led development organization and delivery efforts, managing teams and architecture decisions (role listed in CV; specific accomplishments not provided).

Team Leadership Architecture Project Management C++SQL

Education

Degrees, certifications, and relevant coursework

Centro Universitario UNISEB Interativo

Associate of Science, IT Management

2007 - 2010

Completed an Associate of Science in IT Management from 2007 to 2010, covering foundational IT management and technical coursework relevant to software development and operations.