Marketplace payment platforms
Technical lead of Adyen and Mirakl connector work: sellers, payments, commissions, invoices and financial synchronization across marketplace platforms.
Solution Architect / Tech Lead
Marketplace payments, backend platforms and teams.
I'm Alfredo Caloto, a backend-focused Solution Architect and Tech Lead with deep experience in fintech, Adyen marketplace platforms, Stripe architecture, team coordination and client-facing delivery.
Adyen & Mirakl marketplaces
Stripe certified architect
Tech Lead & team coordination
Expertise
Where I bring senior value.
Stripe architecture
Stripe Certified Professional Billing Architect and Implementation Architect, with experience supporting companies on payment architecture and integrations.
Backend and cloud engineering
Node.js, Java, Spring Boot, GraphQL, AWS Lambda, SQS, PostgreSQL, MongoDB and event-driven backend systems.
Teams, RFCs and clients
Architecture decisions, development team coordination, international stakeholders, technical proposals and RFC analysis for new clients.
Delivery
Hands-on enough to build. Senior enough to lead.
At Seidor I work as Tech Lead on marketplace payment platforms, making architecture and reliability decisions for distributed backend systems built with AWS Lambda, SQS and PostgreSQL.
Before that I worked across Adyen integrations, SAP Commerce automotive marketplace work, Mirakl marketplace integrations and Capgemini/Inditex microservice migration projects using Java, Spring Boot, Kafka, MongoDB and IBM MQ.
Own apps
Products I ship under Caloto.dev.
PartyKit
Party games for groups playing in the same room.
Offline-first, English and Spanish, built around instant rounds, secret roles and simple setup for friends at a party.
