Vitalii Rubizhanskyi

8 years shipping backend and full-stack solutions across fintech, healthcare, e-commerce, and telecom — domains where reliability isn't optional. I've seen enough legacy codebases and fire drills to know that good architecture decisions made early save months of rework later.

Core stack: Java · Kotlin · Spring Boot/Cloud · Hibernate · Kafka & Kafka Streams · Elasticsearch/OpenSearch · AWS (certified SA Associate) · Docker · Kubernetes · Terraform

What I typically deliver:

→ Event-driven microservice architectures (Kafka-based ingestion, enrichment, indexing pipelines)

→ Cloud infrastructure on AWS — designed, deployed, and codified with Terraform

→ API design and backend development with Spring Boot/Cloud

→ Performance optimization, system observability, and production hardening

→ Architecture proposals, ADRs, and technical decision documentation

Why clients stick around: I don't just write code — I make trade-off decisions you can defend in a design review. I document the why behind every architectural choice, communicate proactively, and treat your system as if I'll be the one paged at 3 AM.