Serhii Ostrikov's Website!

Serhii Ostrikov's Website

3 min read

👋 Hey, I’m Serhii

I’m an AWS Platform Engineer who makes sure your cloud infrastructure actually runs — reliably, securely, and without 3 AM alerts.

I work freelance with teams ranging from 3-person startups to Series B companies. Based in Ukraine 🇺🇦, UTC+3, async-friendly, so you’ll always know where things stand.

🏆 Recent Work

Kafka-Driven ESB

⚡ 4,000+ msg/s · 300+ locations 💸 $30K/yr saved 🔒 99.9% SLA maintained
AWS MSK Terraform GitLab CI

On-prem → AWS

🚚 Zero-downtime migration 💸 $60K/yr saved 🚀 16x faster deployments
ECS Fargate Terraform Serverless

Social Media Platform

🌍 15+ microservices · 4 environments 📉 60%+ cluster cost reduction 🚀 3 teams shipping independently
EKS Kubernetes Terraform

More war stories →

🛠️ What I can do for you

  • 👻 AWS environment that grew organically and is now haunted
    • Audit, restructure, and manage your AWS infrastructure — VPC, IAM, ECS, EKS, RDS, networking, and whatever else got bolted on
  • 🏗️ A migration that someone started and nobody wants to finish
    • Plan and execute on-prem to AWS migrations — phased, zero drama, product keeps shipping throughout
  • 🐢 CI/CD pipelines that take 40 minutes and nobody knows why
    • Build CI/CD pipelines that deploy to AWS fast, securely, and without anxiety
  • 😬 ECS / EKS / EC2 workloads that feel fragile
    • Set up and harden containerised workloads on AWS — Fargate, EKS with Karpenter, autoscaling, safe deployments
  • 📋 “We need to be compliant and have no idea where to start”
    • AWS security & compliance — GuardDuty, Security Hub, CloudTrail, IAM least-privilege — so “we’ll fix it later” doesn’t end up on the news
  • 💸 AWS bill that keeps climbing
    • Cost optimisation — Reserved Instances, Savings Plans, right-sizing, scale-to-zero — find what’s quietly burning money and fix it
  • 🔓 “We got a pentest report back and it’s… not great”
    • AWS-specific remediation: WAF rules, IAM hardening, Security Hub findings, network segmentation
  • 🧠 Infrastructure held together by the memory of people who no longer work there
    • Terraform IaC for AWS — codify your environment so it outlives any single engineer

I’ve also worked with GCP, DigitalOcean, and Hetzner — but AWS is where I specialise.

See how I work →

🤔 Not sure if your problem fits? Send me a message — I’ll tell you in 24 hours if I can help.

Graph View