Marcelo
Mottalli

At Shopify, a leading e-commerce platform, I work as a Staff Software Engineer in Shopify Payments, our main revenue source processing $41.1B in 2025 transactions. As a Staff Engineer, I collaborate with other technical teams to make key technical decisions for the product.

• Led a project to revamp the refund system, preventing fraud-related losses and saving $2M annually through improved security measures.
• Working on integrating AI into dispute resolution to enhance how we manage customer disputes.
• Ruby on Rails, MySQL, Yugabyte, BigQuery, LLMs (OpenAI)

At Zendesk, I worked on the team responsible for Zendesk Explore, our analytics product. The team implemented, executed, and monitored ETL pipelines for analyzing customer data at large scale, primarily using Hadoop (Scala) in AWS.

• As a Staff Engineer, led the design and implementation of a generic data ingestion system using Java and Reactive Vert.x, providing a unified way to ingest data from various sources and reducing the time and effort needed for integrations.

As Lead Developer at Grandata, I managed the development of a personal data monetization platform, overseeing the team to ensure high-quality product delivery.

• Managed a team of 8 people and was the main driver of technical decisions.
• Promoted agile methodologies and team management practices, supporting effective product development.
• Leadership, management, Scrum/agile, interviewing; React, React Native, NodeJS, AWS, GraphQL, MongoDB

At Google, I worked as a Customer Solutions Engineer, providing technical support to sales teams by developing solutions for advertisers using the AdWords platform.

• Collaborated across teams, using coding and communication skills to create prototypes, demos, and educational materials that generated significant revenue for Latin America's biggest companies (MercadoLibre, Despegar) and the Argentine Government.
• Cross-team collaboration, customer facing, project management, digital advertisement; Python, Javascript, Angular, Google Cloud, AdWords

As Director of Data Infrastructure at Grandata, I led the team responsible for providing real-time insights on large volumes of data for human analytics.

• Main developer of an in-house analytics database implemented in C++, highly efficient — processing millions of rows per second on low-cost hardware.
• Oversaw processing of data for hundreds of millions of users, focusing on optimizations to improve cost-effectiveness.
• C++, LLVM, Python, Scala, Spark, Hadoop

During my internship at Google, I worked on the backend for reCaptcha, integrating StreetView data to improve image analysis at scale.

• Developed a new approach to incorporate StreetView information into reCaptcha, speeding up the analysis of street images significantly.
• C++, Google stack

As the main developer at GForge, I redesigned the web-based collaboration tool used by companies like GE and Raytheon, focusing on architecture and optimization.

• Designed the architecture for the new version and developed most of the core code, with extensions in Java and C#, leading to a stable system still in use today.
• PHP, PostgreSQL, SCM tools (Git, SVN), Linux administration

At Avatar, I designed and implemented corporate intranets for major Argentine companies, including TGS, the country's largest gas supplier.

• Single-handedly implemented the e-commerce website for Fravega, Argentina's largest electronics retailer.
• Addressed performance issues in the PHP framework by implementing effective caching solutions.