Lucas G. Oliveira

Engineering Lead

// Across code, architecture, and leadership, I build systems and teams that scale.

Belo Horizonte, Brazil

Stack

Leadership

Technical LeadershipSoftware ArchitectureMentorship & OnboardingTechnical InterviewsIncident ManagementDeveloper Experience

Backend

C# / .NETGoJavaNode.jsTypeScriptPythonRuby

Frontend

AngularReact

Cloud & Infra

AWSGCPAzureKubernetesDockerTerraformServerlessDatadogGrafana

Data & Messaging

PostgreSQLMySQLSQL ServerMongoDBElasticsearchRabbitMQSQS / SNS

Practices

MicroservicesDistributed SystemsEvent-Driven ArchHexagonal ArchClean ArchCI/CDObservability

Experience

NEOGOV

Engineering Lead

Feb 2026 — Present

▸ Providing technical leadership in building a multi-tenant SaaS platform for U.S. public sector HR management, contributing to its architecture and engineering practices from the early planning stages
▸ Serving as a technical reference for the engineering team, driving code reviews, mentorship, knowledge sharing, and complex problem-solving
▸ Driving architectural decisions and establishing engineering standards to improve code quality, reduce technical debt, and enhance maintainability and scalability
▸ Partnering with Product Managers, Designers, and stakeholders to define technical solutions, evaluate trade-offs, identify risks, and align engineering priorities
▸ Remaining hands-on with microservices, APIs, and integrations using C#/.NET and AWS, leveraging event-driven architecture and asynchronous messaging through Amazon SQS and SNS
▸ Contributing to AI-powered solutions using Amazon Bedrock, including Knowledge Bases, document ingestion pipelines, and AI-powered chat capabilities
▸ Leading technical investigations into production incidents alongside SRE and infrastructure teams, focusing on root cause analysis, observability, performance, and reliability

★ Contributed to the architecture and evolution of a multi-tenant SaaS platform from its early stages, establishing engineering standards with a focus on security and scalability
★ Helped stabilize AWS Bedrock integrations and document ingestion processes by investigating critical production issues and collaborating with SRE teams to improve AI feature reliability

Mercado Livre

Senior Software Engineer / Tech Lead

May 2025 — Feb 2026

▸ Provided technical leadership within the Business Configurations (BCS) team, part of Fury, Mercado Libre's internal PaaS, supporting dozens of product engineering teams
▸ Designed and developed shared platform services, abstracting cloud complexity and enabling product teams to focus on business logic
▸ Built highly available, scalable services handling millions of daily requests across AWS and GCP, supporting workload migration, traffic routing, and operational resilience
▸ Contributed to architectural decisions and engineering standards, applying Hexagonal Architecture, Clean Architecture, and C#/.NET best practices
▸ Worked across backend, frontend, and multi-language SDKs using C#/.NET, React, Node.js, Go, Python, and Ruby, with MySQL and PostgreSQL
▸ Developed internal SDKs that simplified platform consumption by encapsulating infrastructure, policies, and routing logic
▸ Improved observability using Datadog, Grafana, and Elasticsearch for monitoring, distributed tracing, alerting, and incident investigation
▸ Mentored engineers, led technical onboarding, and collaborated with product, UX/UI, and engineering teams on technical planning, documentation, and developer experience

★ Contributed to platform services supporting dozens of engineering teams and processing millions of daily requests, improving scalability and reliability
★ Helped develop Business Configurations, enabling controlled application changes without code modifications or redeployments, with governance and traceability

BTG Pactual

IT Analyst / Senior Software Engineer

Jun 2024 — May 2025

▸ Strategic planning and prioritization of technical tasks, ensuring on-time deliveries aligned with business objectives
▸ Definition and implementation of development standards, including workflows, Git Flow, branch strategies, and documentation, promoting organization, efficiency, and high-quality outcomes within the team
▸ Mediation between technical and business stakeholders to align priorities and define technical solutions that meet the strategic needs of the business and company
▸ Development of high-availability products used by millions of investors, ensuring consistent performance and operational reliability
▸ Creation of high-criticality solutions for major financial market players, optimizing operations and ensuring compliance in fund management
▸ Implementation of messaging tools such as RabbitMQ, SQS, and SNS for efficient communication in distributed systems, as well as Kubernetes for container orchestration
▸ Active participation in strategic technical initiatives, positioning the team as a reference in efficiency, innovation, and technical excellence
▸ Advanced utilization of AWS and its services

★ Integration of KEDA for intelligent scaling, resulting in a significant reduction in operational costs and optimization of resource usage

CI&T

Dec 2022 — Jun 2024

Senior Software Engineer

Dec 2023 — Jun 2024

▸ Worked on an international project for Coca-Cola LATAM, contributing to the development and evolution of a commercial promotions management platform supporting operations across Latin America
▸ Developed and maintained APIs, backend services, and integrations using C#/.NET, SQL Server, and Microsoft Azure
▸ Contributed to technical and architectural decisions, improving platform performance, scalability, and maintainability
▸ Collaborated with international engineering teams and business stakeholders to analyze requirements, define technical solutions, and coordinate project deliverables
▸ Assessed technical risks, identified opportunities for improvement, and resolved complex technical issues, contributing to platform stability and continuous evolution

Software Engineer

Dec 2022 — Dec 2023

▸ Worked on an international project for Johnson & Johnson's U.S. healthcare operations, contributing to the development, maintenance, and modernization of an enterprise healthcare platform
▸ Analysis and anticipation of risks and solution dependencies during business discussions, as well as the study of process improvements related to the project and the team
▸ Conducting weekly updates to the business team, providing detailed information about our progress
▸ Responsible for the analysis and development of more modern architectures for each solution
▸ Use of AWS and its services

★ Responsible for migrating a legacy platform of the company, leading the planning and development of the new application and achieving over 100% optimization in software and costs compared to the previous version
★ Responsible for enhancing the security of the three applications, safeguarding them against potential attacks of various types

Red Ventures

Jan 2022 — Dec 2022

Software Engineer

Jun 2022 — Dec 2022

▸ Developed and enhanced digital solutions for IQ, focusing on scalability, performance, and continuous product improvement
▸ Contributed to architectural decisions, API and service development, and the implementation of solutions using Node.js, TypeScript, Go, and AWS services
▸ Built CI/CD pipelines, automated cloud infrastructure, and improved development and deployment processes using serverless architectures and Terraform
▸ Collaborated with the engineering team on technical solutions, technology adoption, and continuous improvement of engineering practices

★ Developed a custom CRM system using Go, contributing to its architectural design, implementation, and successful delivery in just two months, while helping the team adopt a previously unfamiliar technology

Jr Software Engineer

Jan 2022 — Jun 2022

▸ Developed and maintained services and features for IQ's card marketplace, contributing to the platform's technical evolution
▸ Implemented performance improvements and enhanced validation processes across applications, optimizing response times and integration reliability
▸ Built monitoring dashboards and observability solutions to identify failures, track service health, and support troubleshooting
▸ Contributed to improving engineering processes by promoting collaboration, knowledge sharing, and software quality practices

★ Implemented integration tests and failure detection mechanisms, contributing to an 80% reduction in application errors
★ Helped establish a continuous feedback culture within the engineering team, encouraging collaboration and ongoing process improvement

TOTVS

Junior Software Engineer

Aug 2021 — Jan 2022

▸ Financial module of the RM product, requirements analysis, coding, testing, debugging and documentation
▸ Performance optimization and information security practices

Take Blip

Software Engineer Intern

Jan 2021 — Aug 2021

▸ Responsible for developing chatbots using Take Blip's Builder, as well, developing intermediate APIs for communication between servers
▸ Experience in a global team, with international clients and conversation in English

★ Establishment of an organizational standard for the chatbots developed by my team, which significantly enhanced the efficiency, organization, and response time of everyone involved in the projects

Netscanner

Software Engineer Intern

Jan 2020 — Jan 2021

▸ Analyzed and identified improvement opportunities within the company's ERP system, developed solutions, and implemented and enhanced features based on internal and client requirements

★ Implemented a Kanban workflow to organize and manage the Development team's internal demands, reducing delivery time by more than 50%
★ Implemented a new, faster and more user-friendly reporting system, simplifying data access for clients and improving operational efficiency
★ Modernized the company's ERP system, which was running on an outdated PHP version. Initiated the migration to Laravel and implemented modern solutions to address specific technical and business challenges faced by the organization

COTEMIG

Technical Monitor

Feb 2019 — Jan 2020

▸ Provision of support, review of classes and general monitoring of students of all grades in technical classes of PHP, MySQL, C#, HTML, CSS, Javascript, OOP, etc.