Hernan Fiorini

Senior Software Engineer

RYZ Labs

Jul 2024 - Jul 2025 (1 year 1 month)

• Built backend services for a real estate agent platform using Amplify Gen 2 and AWS. • Integrated OpenAI and Eleven Labs for conversational capabilities. • Designed scalable cloud infrastructure (ASG, Target Groups, Load Balancers).

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Senior Software Engineer

Amazon Ring

Mar 2020 - May 2024 (4 years 3 months)

• Designed backend microservices for Always Home Cam (autonomous drone). • Built APIs and event-driven services with Golang, AWS, Redis. • Supported real-time data of 100K+ events/second from IoT devices. • Optimized pipelines handling 5–10TB data daily , improving ingestion by 30%.

Senior Software Engineer

FETCHER

Aug 2019 - Mar 2020 (8 months)

• Migrated PHP monolith to scalable microservices with Go and Java. • Developed APIs for recruitment automation. • Built pipelines processing 500K+ daily events and managing 5M+ profiles.

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Senior Software Engineer

Rappi (Payments)

Jan 2019 - Aug 2019 (8 months)

• Led development of payment services migration to microservices. • Payment systems processed 1M+ transactions/day, peaking at 5K–8K req/s. • Improved checkout latency from 400ms to <200ms.

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Senior Full Stack Software Engineer

MonsantoBayer

May 2013 - Jan 2019 (5 years 9 months)

• Developed and enhanced backend features using Java and Spring Boot • Integrated external APIs to support seed recommendations and ordering • Implemented validation and business logic for pricing, availability, and seed compatibility • Collaborated with frontend and product teams to deliver new functionality • Participated in code reviews and performance optimizations

Senior Java Developer

Thomson Reuters

Jul 2011 - May 2013 (1 year 11 months)

• Developed and maintained backend features using Java and Spring Framework • Supported frontend functionality and integration to ensure seamless user experience • Collaborated with legal content teams to structure data access and presentation

SSr Java Developer

Indra

Oct 2009 - Jul 2011 (1 year 10 months)

• Developed backend services using Java 1.3 • Implemented and maintained frontend components using Adobe Flex • Integrated business logic for ticketing and passenger operations • Participated in debugging and optimization of legacy modules

Java Developer

Technisys

Oct 2007 - Oct 2009 (2 years 1 month)

• Developed backend functionalities using Java • Created and maintained dynamic user interfaces with JSP • Fixed bugs and improved performance in critical banking modules • Collaborated with QA and design teams to ensure a secure and user-friendly experience

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