Callistus Nkamuo

Arquitecto de software — sistemas distribuidos, DDD, event sourcing.

disponible para consultoría·LAGOS / REMOTE · UTC+1

Diseño y entrego sistemas orientados a eventos en PHP/Symfony y Go. Llevo el diseño orientado al dominio y el event sourcing a equipos que trabajan con plazos reales, y dejo el resultado lo bastante legible para poder traspasarlo. Fundé AnvilaTech para hacer ese trabajo a escala.

Founder & Principal Architect · AnvilaTech, LLC

2023 — now

Founded an engineering firm delivering event-driven systems for logistics and fintech clients.
Set the technical direction, hiring bar, and delivery practices across every engagement.
Ship production systems in PHP/Symfony and Go with event sourcing at the core.

Independent Software Architect · Independent / Upwork

2018 — now

Top Rated Plus100% JSS2,148+ hours5.0★

Designed and delivered distributed systems for clients across logistics, payments, and SaaS.
Introduced domain-driven design and event sourcing to teams shipping under real deadlines.
Led migrations from anemic CRUD monoliths to bounded, replayable architectures.

Senior Backend Engineer · TODO — prior engagement

2015 — 2018

TODO — owner to supply: scope, systems, and measurable outcomes.
Built high-throughput services and mentored engineers on domain modeling.

Append-only order ledger for a logistics platform → cut reconciliation incidents to near zero

Saga-based fulfillment orchestration → replaced a brittle distributed monolith

Anti-corruption layer over a legacy billing core → let a new context ship independently

Go ingestion service beside a Symfony monolith → absorbed 12× traffic spikes

Grounded AI support assistant → deflected routine tickets without hallucinating policy

Languages

PHPGoJavaTypeScriptSQL

Frameworks

SymfonySpringDoctrineReact

Infrastructure

PostgreSQLKafkaRedisDockerKubernetesAWS

Practices

Domain-driven designEvent sourcing / CQRSSagasTestingObservability