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
Backend leadership for payment-heavy platforms.
I'm Alfredo Caloto. I work where backend architecture, payment operations, marketplace complexity and client delivery need one accountable technical owner.
Adyen & Mirakl marketplaces
Stripe certified architect
Tech Lead & team coordination
Current role
Tech Lead, Marketplace Payments Platform
Certified
Stripe Billing & Implementation Architect
Domain
Adyen, Mirakl, Stripe, SAP Commerce
Expertise
Fintech delivery with architectural ownership.
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.
Operating style
Architecture that survives production reality.
Clear ownership
Technical direction, tradeoffs, RFCs and stakeholder alignment without hiding behind process.
Backend depth
Hands-on experience across event-driven services, financial workflows and large operational datasets.
Client fluency
Comfortable translating architecture into implementation plans clients and teams can actually execute.
Own products
Independent apps built with taste and restraint.
SpendFlex
Elegant control over personal spending.
A private, offline-first personal finance app for ambitious young professionals who want a calmer, more refined way to understand their money.
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.
