Kostiantyn D.

I help startups and enterprises design secure, scalable, and cost-optimized cloud infrastructure on AWS. Not sure where to start? I offer a free 30-minute AWS cost review Your AWS bill goes up every month. Deploys are a held-breath event. And somewhere in your stack, a runtime, a database version, or a self-hosted system is hitting end of life with a hard deadline attached. That's usually when a team starts looking for someone who has untangled this exact mess before - more than once. That's what I do. I'm a Senior AWS DevOps Engineer and Solutions Architect with 5+ years on AWS, and I take aging, expensive, fragile setups and turn them into boring infrastructure: legacy systems moved onto managed services, one-command deploys instead of release-night rituals, and a cloud bill that trends down instead of up. For 5 years I owned the AWS platform behind a martech and digital-analytics SaaS serving enterprise clients, including Fortune-500 financial and automotive brands: the whole platform defined in Terraform, an ECS/Fargate and Lambda fleet, CI/CD, security, and the Snowflake data platform underneath. I hold 9 cloud certifications, including AWS Solutions Architect, Developer, SysOps, and Security Specialty; HashiCorp Terraform Associate; Snowflake SnowPro Core; and all three Kubernetes certs (CKA, CKAD, CKS). ⚡ Problems I solve ✔ "AWS emailed us that our database version hits end of support, and the extended-support fees have already started." I migrate you to supported managed services before the deadline, with a zero-downtime cutover. ✔ "Our AWS bill doubled and nobody knows why." I run a FinOps-style cost audit on your actual usage; it commonly surfaces 20–40% in savings. ⚡I offer this review for free - see the end of my profile. ✔ "Deploys are slow and scary, and every release needs a war room." I rebuild your CI/CD with guardrails your team trusts, typically cutting deploy times by more than half. ✔ "SOC 2 is coming and our IAM is a mess." I clean up secrets and IAM and automate rotation so it stays clean. ✔ "Snowflake burns credits faster than we grow." I right-size warehouses and tune the pipelines behind them. 🛠 What I can take off your plate ✔ Cloud migration: 6+ legacy systems moved to AWS managed services (Rancher to ECS/Fargate, self-hosted Redis to ElastiCache with zero downtime, Consul to Secrets Manager, Nexus to ECR, Scalyr to New Relic), plus end-of-life runtime upgrades on a deadline. ✔ AWS cost optimization and FinOps: Graviton and rightsizing, Karpenter on EKS, S3 storage classes, ECR lifecycle policies, CI spend, and Snowflake warehouse auto-downsizing. ✔ CI/CD and GitOps: Jenkins to CircleCI, reusable Terraform pipelines, GitLab CI, GitHub Actions with OIDC to AWS (no more long-lived keys), and ArgoCD for Kubernetes deployments. ✔ Security hardening: IAM and secrets rotation, WAF and rate limiting, MFA-gap alerting — the groundwork SOC 2 auditors expect. ✔ Data and AI platform work most DevOps profiles skip: Snowflake cost control and schema management, Fivetran/Stitch replication with PII isolation, and infrastructure for AI/LLM workloads (Amazon Bedrock, GPU capacity, vector stores). 🧰 Technologies: AWS (EC2, ECS, EKS, Fargate, Lambda, RDS, Aurora, DynamoDB, S3, CloudFront, Route 53, VPC, IAM, SQS, SNS, ElastiCache, CloudWatch, Secrets Manager, WAF, Bedrock), Terraform, AWS CDK, CloudFormation, Kubernetes, Karpenter, ArgoCD, Docker, Linux, Bash, GitHub Actions, GitLab CI, CircleCI, Jenkins, Python, Java, Scala, Kotlin, TypeScript, Node.js, MySQL, Snowflake, New Relic, OpenTelemetry. One thing separates me from the typical AWS DevOps Engineer: I'm a senior backend engineer first. I've owned production Scala and Java services end to end, and I build in Python, TypeScript, and Kotlin today. When a deploy breaks, I can follow the problem from the load balancer into your application code - and fix it there. An easy first step: message me a screenshot of your last AWS bill and I'll do a free 30-minute cost review. You'll walk away with 2–3 specific savings opportunities, whether or not we work together.