// DevOps & Infrastructure
Automation at Scale
- ›CI/CD pipelines (Cloud Build, GitHub Actions)
- ›Kubernetes orchestration on GKE
- ›Infrastructure as Code (Terraform)
- ›Cost optimization & right-sizing
- ›Natural language infrastructure management
cloud-build — production
$ git merge release/v2.1 → main
> remote: Cloud Build triggered — build #312
> [1/4] npm test — 63 passed, 0 failed (11s)
> [2/4] docker build & push agent-api:v2.1 (19s)
> [3/4] kubectl rollout deploy/api-gateway ✓
> [4/4] kubectl rollout deploy/rag-worker ✓
> ✓ Deployment #312 complete in 43s
Senior DevOps & AI Engineering Consultant
AI handles ops. You handle what matters
DevOps automation, AI agents, and backend systems — built by one senior engineer who ships.
// Services
// AI Engineering
Intelligent Systems
- ›RAG pipelines & vector search
- ›LLM agent orchestration
- ›AI workflow automation
- ›Embedding & semantic retrieval
// Backend Development
Production-Grade APIs
- ›TypeScript / Node.js / NestJS
- ›REST & GraphQL API design
- ›Microservice architecture
- ›BigQuery data lakes & ETL pipelines
- ›PostgreSQL, Redis, event-driven systems
1 engineer, no overhead
End-to-end ownership
GCP + Kubernetes native
LLMs that talk to your infra
// Process
01
Discovery
Understand your stack, goals, and constraints. No generic audits — a focused session on what matters.
02
Scoped Delivery
Clear milestones, weekly updates, no surprises. You see progress in your own repos from day one.
03
Ship & Hand Off
Documented, production-ready code. Your team can maintain it without me. That's the point.
// Tech Stack
GCPKubernetesNestJSTypeScriptNode.jsLangChainOpenAIAnthropicBigQueryAirbyteDockerTerraformPostgreSQLRedispgvector
// About
$ whoami
> Karolis Ščerbiakas
> Senior Backend Engineer & DevOps Specialist
> Klaipėda, LT · aitoras.com
I build infrastructure automation and AI systems for companies that need senior-level execution without agency overhead. From NestJS microservices on GKE to RAG pipelines that make your docs searchable by natural language — I handle the full stack, solo, and ship production-ready.
// What clients say
// print-on-demand · e-commerce★★★★★
Karolis is the kind of freelance infrastructure engineer you want on your team - versatile, dependable, not afraid of new challenges. He upgraded our Kubernetes cluster to the latest version with auto-scaling and zero downtime, centralised our infra config, automated our deployment pipelines, and built tooling for on-demand isolated test environments. He consistently brings ideas that save costs, improve uptime, and reduce friction. Highly recommended.
— Vilius Žurauskas, Podbase.com
// ai training · fintech★★★★★
Karolis provided the expert knowledge, personalized training and guidance I needed to bridge the gap between AI theory and real-world automation. Sessions offer condensed, high-impact knowledge that significantly improved my confidence in the subject. A must for anyone looking to fast-track their AI fundamentals and implementation strategies for any use case.
— Gytis Dambrauskas, Senior Product Manager
> Available on request: references and additional client examples.
$ ./contact
>Typical engagement: 4–12 weeks per phase, or retainer
>Model: project-based or monthly retainer
>Stack: AI/LLM · Node.js/NestJS · GCP · Kubernetes
>Rate: projects from €3,000 · retainers from €2,500/mo