# KoodiKiht.Dev (KoodiKiht OÜ)

KoodiKiht OÜ ("Code Layer" in Estonian: `koodi` = code, `kiht` = layer) is an Estonian B2B engineering company operating across the European Union and the United States. We design, audit, and build resilient infrastructure, deterministic automation pipelines, and custom backend systems.

## Entity and operations
- Legal entity: KoodiKiht OÜ
- Jurisdiction: Republic of Estonia (European Union)
- Operational footprint: European Union and United States (B2B contracting)
- Website: https://koodikiht.dev
- Contact: contact [at] koodikiht.dev

## Core capabilities
- **Infrastructure buildup**: provisioning cloud, bare-metal, and edge environments engineered for high availability, network segmentation, and strict workload isolation.
  - Multi-region Kubernetes, Nomad, and bare-metal cluster provisioning.
  - Zero-trust private networking, WireGuard mesh, and edge ingress routing.
  - Declarative infrastructure-as-code (Terraform, OpenTofu, Ansible) with immutable state.
- **Infrastructure audit**: evaluating system architecture, runtime performance bottlenecks, and security boundaries before traffic spikes or compliance reviews.
  - End-to-end latency profiling, database query plans, and resource saturation analysis.
  - IAM privilege boundaries, secret lifecycle, and container attack-surface review.
  - Failover simulation, backup recovery verification, and cloud cost optimization.
- **Automated pipelines**: connecting disparate tools, data stores, and delivery workflows into deterministic, self-healing CI/CD and ETL pipelines.
  - Reproducible CI/CD build, test, and canary deployment pipelines with instant rollback.
  - High-throughput ETL/ELT data ingestion, schema validation, and event-streaming buses.
  - Automated infrastructure drift detection, alerting routing, and self-healing runbooks.
- **System creation**: building custom backend services, distributed control planes, and high-concurrency APIs from the ground up.
  - High-concurrency backend APIs, microservices, and distributed state machines.
  - Custom internal developer platforms (IDP), operator control planes, and CLI tooling.
  - Legacy monolith decomposition and zero-downtime database migration architectures.