Infrastructure that holds
under real load.
I'm Oggah Oluwatobi, a DevOps and full-stack engineer. I design, build and operate the systems behind production platforms — from the database schema to the pipeline that ships it and the cluster that keeps it alive at 3am.
Engineering as a discipline, not a toolset.
Hagios is the practice through which I build and operate software systems for founders and teams who need infrastructure that doesn't fall over — websites that work, brands that grow. The work spans the full lifecycle: architecture, application code, data layer, deployment pipeline, monitoring and the on-call reality after launch.
Every engagement is treated the same way regardless of size — version-controlled, documented, monitored, and built so that someone other than me could take it over on a bad day. That's what "senior" actually means in this line of work.
What I build with
A working stack assembled around reliability, not novelty — each tool earns its place because it's been run in production.
Full-stack engineering
- React / Next.js Frontend
- TypeScript App layer
- Node.js / Express Services
- REST & GraphQL API design
Database & data systems
- PostgreSQL / MySQL Relational
- MongoDB / Redis NoSQL / cache
- Schema design Modeling
- Backup & migration Data safety
Cloud & infrastructure
- AWS / GCP Compute
- Docker Containers
- Kubernetes Orchestration
- Terraform Infra as code
CI/CD & automation
- GitHub Actions Pipelines
- Automated testing Quality gates
- Blue-green deploys Zero downtime
- Rollback strategy Safety nets
Observability & reliability
- Prometheus / Grafana Metrics
- Structured logging Debuggability
- Uptime monitoring Alerting
- Incident response On-call
Security & delivery
- OAuth / Auth0 AuthN • AuthZ
- Secrets management Vault / env
- Access control Least privilege
- Technical documentation Handover
Systems in production
Each preview below is a live client platform. Full case studies — architecture, tooling and outcomes — are shared on request.
More from the archive
Interface work, dashboards and system diagrams from past engagements.
Full work history, on request.
The CV covers engagement history, system architecture decisions and references. I share it directly with people I'm in an active conversation with, rather than leaving it open to anyone passing through.
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Open for consulting, contract engineering and senior DevOps roles.