Amazon Business marketplace launches where my engineering work directly contributed to expansion outcomes.
Software Development Engineer II @ Amazon · Madrid, Spain
Santiago
Cereijo Botana
Backend & distributed systems engineer working on Amazon Business international expansion. I build production systems with Java, TypeScript, and AWS, with a focus on reliability, scale, and solutions that stay simple to operate.
Currently at
01 / IMPACT
Production engineering with measurable impact.
Backend, platform, and international expansion work shipped at scale.
Engineering effort saved during expansion by automating the creation and maintenance of operational metrics.
Applications gained right-to-left support through an update to a shared component library.
Contributed to a major infrastructure deprecation by migrating a subscription upsell system to a modern content framework.
02 / SELECTED WORK
Backend systems. Global products.
A selection of production work across distributed systems, platform engineering, and international launches.
01
Made content operations self-service.
Migrated a business subscription upsell experience from a legacy renderer to a modern content framework. The new system supports ~18 configurable variations and lets non-engineers schedule updates without code changes.
OUTCOME$2M+ deprecation
02
Turned RTL support into a platform capability.
Updated buttons, tables, dropdowns, and cards in a shared UI library to support right-to-left languages—resolving 40 rendering issues and creating a reliable path for teams launching in new regions.
OUTCOME~120 applications gained RTL support
03
Untangled compliance across five services.
Traced authorization and invoice generation failures through five interdependent backend services, enabling customers with multiple legal entities to generate compliant e-invoices under fast-moving regulatory constraints.
OUTCOMEMarketplace launch unblocked
03 / ABOUT
Backend engineer.
Backend engineer.
Curious builder.
I’m a Software Development Engineer II at Amazon, currently working on Amazon Business international expansion. Most of my day-to-day work sits around backend services and distributed systems: understanding how systems behave in production, tracing problems across service boundaries, and building changes that can scale across markets.
I enjoy turning complicated problems into simple, reliable solutions. My main stack is Java, TypeScript, and AWS, but I’ve also worked across computer vision, developer tooling, frontend platforms, and applied AI—experience that helps me look at engineering problems from more than one angle.
01Understand the system
02Keep solutions simple
03Build for production
04 / TOOLBOX
Backend-first. Production-minded.
COREJava · TypeScript · Distributed Systems · System Design
BACKEND & CLOUDAWS · Spring · Microservices · REST APIs
ENGINEERINGEvent-Driven Architecture · IaC · Observability · CI/CD
ADDITIONALComputer Vision · Machine Learning · i18n · Developer Tooling
05 / EDUCATION
Strong foundations,
Strong foundations,
international perspective.
European Master in Software Engineering
Universidad Politécnica de Madrid · Delivered in English
Bachelor’s in Computer Engineering
Universidad de Salamanca · Thesis with Honours · Erasmus in Slovenia
Thesis: AI-powered iOS dartboard scoring using computer vision, deep learning, synthetic data, and 3D geometry.
06 / LET'S BUILD
Interested in solving
Interested in solving
hard engineering problems?
I’m interested in backend and distributed-systems teams working on products with real scale, strong engineering challenges, and meaningful ownership.
[email protected]