Lucas Carvalho

• Developed monitors with alerts and dashboards in Datadog for 25+ applications and microservices, including AWS Lambda functions and Amazon ECS containers, detecting recurring incidents and enabling fast resolution.
• Implemented advanced monitoring for Amazon SQS and SNS queues to identify unmapped errors and blocked messages in Dead-Letter Queues (DLQs). Also created monitors based on custom business metrics that anticipate issues before they become errors, using custom tags and metrics fed every 15 minutes by AWS Lambda functions. This enabled proactive responses and reduced client impact.
• Contributed to Terraform infrastructure modules provisioning reusable resources parameterized through variables. These modules are widely adopted across Itaú and used daily by hundreds of engineers, accelerating delivery of complex features. For example, I developed Kafka consumers redirecting messages to SQS or SNS queues, promoting code reuse and faster implementation.
• Designed AWS architectures using Amazon DynamoDB, AWS Lambda functions, and DynamoDB Streams to propagate events in real time, acting as the 'heartbeat' of the system and instantly notifying clients of their operations.
• Automated dynamic scheduling with Amazon EventBridge Scheduler, eliminating unnecessary database queries for daily or unpredictable events.
• Acted as a key contributor and architectural pillar in developing a stable, mission-critical system for all scheduled corporate payments (B2B) through Pix Automático (Automatic Pix) - the new recurring payment feature built on Pix, Brazil's most important instant payment method, replacing traditional direct debit. Defined the system's architecture and core technologies, ensuring scalability, reliability, and compliance.
• Supported migration of a fixed-income investment portfolio from a legacy system to AWS, acting as the primary knowledge resource for cloud and infrastructure in a team with no prior AWS experience.

Worked on a nationwide public Wi-Fi platform that enabled telecom operators and large retailers to offer branded connectivity to their customers. The product served thousands of access points across Brazil, impacting millions of end users.

Developed and maintained backend services (Node.js, Java, Spring Boot) and frontend applications (AngularJS) as a full-stack engineer, delivering features directly tied to the core product.

Built a personalized campaign delivery system leveraging geolocation and user analytics, which displayed targeted advertisements and promotions based on demographic profiles (e.g., location, age, and interests).

Collaborated with cross-functional teams to integrate data pipelines, analytics, and proximity-based APIs, enabling real-time marketing triggers when users’ devices connected near major Wi-Fi hotspots.

Enhanced system scalability and performance by optimizing API endpoints and implementing AWS services such as Lambda, SQS, ECS, and DynamoDB.

Provided technical support and maintenance for employee workstations and servers of ANBIMA staff allocated at the Central Bank of Brazil, ensuring system stability and continuous operation.

Assisted in the upkeep of local infrastructure, network equipment, and on-site technology assets, resolving incidents and supporting hardware and software configurations.

Gained hands-on experience in IT infrastructure and systems administration, laying the groundwork for the transition to software engineering roles.

Provided technical support and maintenance for employee workstations, servers, and local infrastructure, ensuring operational stability across multiple departments. Managed user accounts and access controls through Active Directory, supported network troubleshooting, and assisted in on-site hardware and software maintenance.

Delivered technical assistance to internal users and performed diagnostics to resolve incidents efficiently.

Built a strong foundation in IT infrastructure, networking, and systems administration, which later facilitated the transition to software engineering roles.