Callistus Nkamuo
Architecte logiciel — systèmes distribués, DDD, event sourcing.
ouvert aux missions·LAGOS / REMOTE · UTC+1
Je conçois et livre des systèmes événementiels en PHP/Symfony et en Go. J’apporte la conception orientée domaine et l’event sourcing à des équipes soumises à de vraies échéances, et je laisse un résultat suffisamment lisible pour être repris. J’ai fondé AnvilaTech pour mener ce travail à plus grande échelle.
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 — nowTop 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