Hassan Oliveira

Brazilian social-impact technology company specialized in innovation through software, AI, and data science; also building EAD platforms and learning experiences to help mission-driven organizations scale their projects. Led DevOps initiatives to build CI/CD and cloud infrastructure from the ground up. – Set up an on-prem GitLab on Proxmox, with dedicated VMs for the GitLab instance and for runners. – Built reusable CI/CD components to standardize staging and production deployments across projects. – Created CI/CD modules to provision AWS services via CloudFormation, enabling repeatable, auditable infrastructure changes. – Designed and deployed a scalable Mautic + n8n stack on AWS (ECS Fargate, RDS, Redis, ALB, SES), replacing a third-party email platform and cutting monthly costs from ~$4,000 to ~$300 (~92% savings). – Implemented container build & release pipelines (ECR + ECS updates) to automate rollouts with minimal downtime. – Established baseline DevOps practices company-wide, accelerating delivery and improving reliability.

Leading technology company in the financial market in Latin America, providing advanced solutions that connect more than 2 million users across over 150 countries. Worked with development, automation, and enhancement of technical and operational processes. – Created a reusable CI/CD component for backend, reducing pipeline creation time from days to hours. – Standardized over 35 projects/pipelines, cutting 400+ lines of code to about 10. – Improved security and delivery quality by updating 35+ pipelines with the new component. – Built a database auditing service using AWS Lambda and SQS to track changes and log issues in Jira – Integrated database changes into Git, ensuring consistent and reliable deployments.

Leading technology company powering the global travel and tourism industry. Its platform connects the entire travel and hospitality ecosystem, fostering innovation, partnerships, and responsibility towards people, places, and the planet. It seeks to create more connected ways of thinking centered around the traveler, making travel a force for social and environmental good. – Implemented significant improvements to the database structure using Java and Maven, optimizing storage and metadata management. – Created specialized backend components using Java, improving the system's scalability and robustness. – Expanded and updated existing APIs to handle custom data, ensuring compatibility with the system's new requirements. – Developed a system to organize and group metadata, improving the accuracy and efficiency of information publication. – Conducted testing and deployment using Jenkins, SonarQube and Docker, enhancing system reliability.

International startup backed by YCombinator, connecting the world's top athletes, artists, and creators with their fans through an innovative gamified experience. Trendex is a rapidly growing company supported by some of the world's most successful investors and celebrities. – Developed a data analysis and processing system using Python and MongoDB. – Utilized the PyMongo library to interact with MongoDB and perform queries and aggregations. – Implemented filters, projections, and aggregation operations to extract specific information from stored documents. – Leveraged the pandas and numpy libraries for data manipulation, analysis, and numerical calculations. – Created scripts to automate tasks such as generating reports and visualizing results. – Acquired skills in programming, data analysis, and database manipulation. – Gained a deep understanding of the MongoDB ecosystem and its functionalities.

– Corrected and optimized the ECM Mobility-Online platform using Node.js, improving user experience and functionality. – Integrated new fields into the exchange platform, according to needs. – Maintained and optimized the platform's database, ensuring data integrity and system performance.

– Managed domains and configured DNS using Cloudflare, improving website security and availability. – Set up and maintained development and production environments, ensuring smooth version transitions. – Implemented backup procedures via SSH, increasing infrastructure resilience. – Resolved critical website issues such as plugin failures and form errors, maintaining system uptime. – Automated routine maintenance tasks using Bash, reducing manual workload and improving efficiency.