Dmytro Varchuk

Migrated 100 legacy Lambdas to NestJS on ECS Fargate, fixing ~2s cold starts & cutting p95 latency by ~35%.
Scaled platform through Eurovision-scale traffic (8x spike) with zero incidents using ECS & SQS dampers.
Built MediaConvert video pipeline (~10K daily uploads) with async AI moderation, cutting failed renders by ~90%.
Cut DB read load by ~40% & compute cost by ~25%.

Built WebSocket price streaming for 400+ pairs (~5K connections, <100ms latency), cutting bandwidth by ~35%.
Built 5-region setup with latency-based routing, cutting median latency by ~40% for non-EU users.
Built MT5 proxy for all order types & candle storage over 5M+ records (<300ms query latency).
Scaled Node.js via Redis Cluster & set up OpenTelemetry, Prometheus, and Grafana observability.

Led 11 engineers, hired 4 core members, and set up CI/CD & testing standards.
Executed zero-loss migration of millions of lending records & redesigned clean microservices.
Architected payment orchestration service (Platon, City24, EasyPay, PUMB API) with SOAP & async callbacks.
Developed digital signature, BankID verification, and reconciliation systems.

Led 11 engineers, hired 4 core members, and set up CI/CD & testing standards.
Executed zero-loss migration of millions of lending records & redesigned clean microservices.
Architected payment orchestration service (Platon, City24, EasyPay, PUMB API) with SOAP & async callbacks.
Developed digital signature, BankID verification, and reconciliation systems.

Built a multi-step questionnaire engine with analytics APIs recommending tailored SAP services.
Developed insurance policy management platforms, REST APIs, and dashboards for UK clients.
Maintained database schemas & integrated components in containerized Kubernetes environments.