# Eduardo Ornelas > Senior Software Engineer at Mailchimp Location: Los Angeles Metropolitan Area, United States Profile: https://flows.cv/eduardoornelas As a seasoned Senior Software Engineer, I thrive at the intersection of engineering excellence and impactful product development. With a deep passion for crafting scalable systems and infrastructure, I specialize in building high-quality features that deliver measurable value to both users and businesses. Throughout my career, I've driven data-first solutions that enhance quality and performance, leveraging cross-functional collaboration to align product vision with technical execution. I excel in solving complex technical challenges, simplifying legacy architectures, and designing robust, forward-looking platforms. Whether I'm improving real-time systems, architecting fault-tolerant infrastructure, or mentoring teams on sustainable practices, I am motivated by creating solutions that stand the test of time. I’m currently seeking product engineering or full-stack engineering opportunities where I can continue driving innovation and delivering high-impact results. Let’s connect and discuss how my passion for product engineering and full-stack development can drive impactful solutions and shape the future of innovation at your company or within your team! ## Work Experience ### Senior Software Engineer @ Mailchimp Jan 2020 – Present | Los Angeles Metropolitan Area As a Senior Software Engineer at Mailchimp, I thrive on simplifying complex systems and transforming legacy architectures into scalable, resilient solutions. I’ve worked on a number of impactful projects driving business growth and innovation: - Emailless Contacts Import: Contributed to SMS-only contact imports, unlocking over 1 million new types of contacts, boosting SMS capability and supporting international expansion into numerous European countries and setting the company up for further expansion in international markets for omnichannel marketing. - Import Error Rearchitecture: Reduced creating new import errors from one week to under 10 minutes, improving system understandability and empowering precise issue resolution by our users. - File Type Expansion: Delivered increased file support for audience import, focusing on xlsx initially, meeting long-standing customer demand with minimal changes and rapid execution. - Algorithmic image generation in Email Campaigns: I led the efforts to take our algorithmically generated images capability and add it as an option for users to add generated images that led to increased engagement and decreased campaign editing times. Collaboration is central to my success. I’ve partnered with teams across SMS, API, Customer Support, and Product Management to ensure alignment and deliver results. By documenting project learnings and outcomes, I create lasting value and drive continuous improvement. I’m a passionate advocate of theorycrafting—breaking down ambitious problems into testable prototypes. This approach has enabled me to tackle complex, high-effort challenges, proving that even the most improbable ideas can become reality through iteration and ingenuity. Ultimately, I thrive on transforming complexity into clarity, building systems that empower teams to innovate confidently and deliver impactful results. ### Lead Frontend Developer @ Tech Gap Solutions llc Jan 2018 – Jan 2020 | Tucson, Arizona - Was part of a globally distributed team that built a Medical Dossier Management Frontend for a client in Milan, Italy. - Lead the UX and Engineering redesign process on a Territorial Heritage Marketing Platform for UNESCO Creative Cities and Knowledge Keepers. ### Web Developer @ University of Arizona Jan 2016 – Jan 2018 | Tucson, Arizona Area - Created a Travel Registry and Risk Management web solution that was built with a user centered design. - Partnered with Tech Launch Arizona and Behavioral Sleep Medicine Scientists from University of Pennsylvania and Stanford to create a product that can optimize your sleep through manual input of sleep data as well as leveraging wearable technologies for automated daily data retrieval. ### Supplemental Instruction Leader @ Arizona Western College Jan 2015 – Jan 2016 | Yuma, Arizona Area ## Education ### Information Science in Information Science University of Arizona Jan 2016 – Jan 2018 ### Computer Science Arizona Western College Jan 2014 – Jan 2016 ## Contact & Social - LinkedIn: https://linkedin.com/in/ornelaseduardo - Website: https://gitlab.com/ornelas_eduardo --- Source: https://flows.cv/eduardoornelas JSON Resume: https://flows.cv/eduardoornelas/resume.json Last updated: 2026-03-23