/ A. Pozo

Selected Work

Case Studies

A curated set of engagements across ERP, accounting and operations. Names anonymised; outcomes verifiable on request.

01 Enterprise · B2B SaaS 2025

A domain-driven kernel for Spring Boot — and the bounded context that proved it

A Spring Boot 4 / Java 25 backend refactored from a layered monolith into an explicit domain-driven architecture. Two deliverables: an in-house architectural kernel — CQRS buses, saga engine, transactional outbox, idempotence, declarative criteria, value-object primitives — and a first bounded context built on it as proof, replacing a 743-line legacy service with fifteen single-responsibility application services and a transactional saga.

  • Backend Architecture
  • DDD
  • CQRS
  • Hexagonal
Backend Architect · Kernel & Migration Lead Read case study →
02 B2B Operations · HR & Payroll 2025

An HR attendance and cash-flow platform, modelled as bounded contexts in NestJS

A full-stack monorepo (NestJS + React 19 + Prisma) for HR operations: schedules, payroll closures, deductions, charges, payments and cash-flow accounts. Same domain-driven discipline as a sibling Java/Spring backend — Hexagonal, DDD, CQRS — deliberately ported to TypeScript with a kernel of 83 in-house primitives.

  • Backend Architecture
  • DDD
  • CQRS
  • Hexagonal
Full-Stack Architect · Backend Lead Read case study →