Lucas Da Silva Macedo

Owned the backend architecture of 5 SaaS products end-to-end, from greenfield design to production. - Rescued a product stalled in development for 1+ year and shipped it to production in 6 months — introduced agile methodology, migrated infrastructure from Vercel + DigitalOcean to AWS, and refactored an over-engineered NestJS codebase into a clean domain-driven modular architecture - Designed and built 4 greenfield APIs with FastAPI from zero — each as a modular monolith structured for future microservices migration without a rewrite - Replaced manual weekly deploys (error-prone) with automated blue-green CI/CD via GitHub Actions — eliminated all deployment errors that occurred manually - Led and restructured a backend team of up to 6 engineers — handled hiring, technical onboarding, and delivery pace - 5 products in production serving 100+ users across internal teams and external pilot clients Stack: Python · FastAPI · Django · NestJS · AWS (EC2, Elastic Beanstalk, RDS, S3, CloudFront, Route53) · GitHub Actions · PostgreSQL

Backend lead for Deduca, the company's core content creation and client management platform. - Reduced API response times from seconds to milliseconds on high-traffic endpoints through systematic load testing with JMeter and targeted optimization - Maintained 97% test coverage across all APIs, enforced automatically via SonarQube integrated into the CI/CD pipeline - Implemented blue-green deployment for all APIs — zero-downtime releases on every production update - Led a team of 6–7 engineers (backend, frontend, QA) — ran daily standups, sprint planning and retrospectives - Contributed backend to two additional products: Dstore (educational content marketplace) and Autorya (content creation tool) Stack: Python · Django · Django REST Framework · AWS · GitHub Actions · SonarQube · JMeter · PostgreSQL

Backend engineer on long-term consulting engagements — building and maintaining production APIs for clients across retail, logistics, and education verticals. What this role really required: operating autonomously in ambiguous environments, owning backend systems end-to-end, and translating business requirements directly into working software — without a team of specialists to fall back on. Key impact and responsibilities: - Designed and built RESTful APIs using Python, Django, and Django REST Framework across multiple client projects - Modernized legacy systems: improved performance, reduced technical debt, and stabilized systems that had reliability issues under production load - Contributed to full-stack delivery using React and Angular, ensuring backend/frontend alignment from the start - Managed deployment pipelines and release processes, contributing directly to production reliability Stack: Python · Django · DRF · React · Angular · PostgreSQL · REST APIs

Worked as a mid-level backend developer on educational systems, focusing on API development, client environment management, and technical support for architectural decisions. Key Achievements: • Developed and maintained RESTful APIs using Django and Django REST Framework • Defined API endpoints and data models based on business requirements • Actively participated in agile ceremonies such as sprint planning, reviews, and retrospectives • Responsible for creating release packages and updating client environments • Contributed to technical documentation and collaborated with the architecture team • Supported continuous improvement initiatives and helped clarify technical requirements

Worked as a junior developer supporting the development of web and mobile systems, focusing on backend tasks and interface integration. Key Responsibilities: • Assisted in the development and maintenance of RESTful APIs • Participated in gathering technical requirements and documenting endpoints • Helped create class diagrams and define data structures • Supported the development of interfaces for web and mobile platforms • Collaborated on technology research and architectural solution discussions • Contributed to the integration between frontend and backend components

Worked as a software development intern supporting the creation of web and mobile application interfaces and assisting in backend integration and system design. Key Responsibilities: • Assisted in the development of APIs and backend services for web and mobile platforms • Participated in defining endpoints, class diagrams, and data flows • Supported interface development and programming logic across platforms • Collaborated with the team on research and implementation of architectural solutions • Contributed to discussions on backend structure, code organization, and system improvements

Provided direct technical support to clients, ensuring proper system operation and assisting users with questions and issues, with a focus on the pharmaceutical sector. Key Responsibilities: • Delivered technical support to users regarding the company's enterprise system • Specialized in supporting modules for pharmaceutical inventory and controlled substance tracking • Assisted clients in understanding system functionalities and resolving operational issues • Logged and followed up on support tickets, identifying and troubleshooting system errors • Collaborated with the development team by reporting bugs and suggesting improvements • Helped document support processes and maintain internal knowledge base content

Specialization program focused on the protection of digital environments and corporate networks. Covered topics included cryptography, firewalls, security protocols, vulnerability assessment, access control policies, compliance, and governance. Developed both technical and strategic skills to support incident prevention, detection, and response in information security.