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lazaror94

Lazaro R

@lazaror94

Senior Software Engineer

United States
English, Spanish
About me
I am a senior-level backend software engineer with over 7 years of experience designing and delivering production APIs, distributed services, and payment platforms. I specialize in Kotlin and Java, helping product teams turn clear ideas into maintainable backend features and milestone-based MVP releases. I bring strong hands-on depth in API design, event-driven systems, and cloud-ready delivery.... Read more

Skills

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lazaror94
Lazaro R
Offline • 
Average response time: 1 hour

See my services

API & Integrations
I will build kotlin backend apis and features for your mvp
From$65 / projectMore details
Android App Development
I will build a kotlin android app or mobile mvp prototype
From$200 / projectMore details

Work experience

American_Express

Backend Software Engineer

American Express • Full-time

Jan 2018 - Present • 8 yrs 8 mos

Build and operate APIs, payment services, and event-driven workflows for international products. Owned end-to-end delivery of REST APIs, modernized architecture with hexagonal design, and defined authentication strategies. Designed payment-processing for international expansion (US, Canada, Australia) and scaled Kafka-driven attribution services across Europe. Replaced licensed ETL platforms with in-house Java/Spring Boot services, saving $20,000 annually.