ronat

Sole owner of algorithmic trading OMS backend, monitoring infrastructure, and operations dashboard at a cryptocurrency exchange. - Built a Golang FSM(StageLoop)-based OMS execution engine processing 100+ concurrent strategy signals - Implemented full pipeline: WebSocket signal ingestion -> Redis state management -> exchange API order routing - Blocked production-critical edge cases: partial fill accumulation, SIGKILL restart recovery, SETNX idempotency guards, stale-orderbook detection with REST fallback, distributed kill-switch deduplication - Built observability stack: VictoriaMetrics + Grafana (15 custom metrics), React/TypeScript ops dashboard with WebSocket-pushed live PnL - 356/356 unit tests + 50 integration scenarios (StateMachine, Dispatcher, Races, Redis, Exchange, Restart) - Designed and ran an AI-native development workflow (Claude Code): layered context docs, hook-based governance, 19 upfront design specs, and an AI code-review loop that caught 6 production bugs pre-merge Stack: Golang, Redis, VictoriaMetrics, Grafana, React, TypeScript, WebSocket, FSM

Sole engineer managing 4-5 internal systems used by 30-50 employees across 4 departments. - Designed and built next-gen CRM from scratch (Laravel, on-premises MSA architecture) - Developed Log Management System; resolved slow query bottlenecks; managed cloud/local server infrastructure - Built Android (Kotlin) auto-reply SMS app and call log management app - Full-stack delivery of new web service end-to-end: requirements -> deployment -> ops Stack: PHP, Laravel, MySQL, Kotlin, AWS, Docker, REST API

Independently contracted, built, and delivered web/app projects across multiple domains. - Completed 4 new projects including CRM and API relay platform, plus 2 maintenance contracts - Handled full lifecycle solo: requirements -> estimation -> QA -> deployment -> operations - Completed a 2-month short-term SI placement as frontend developer Stack: PHP, Laravel, React, JavaScript

Led the engineering team: established collaboration standards and modernized the tech stack. - Introduced Slack + Notion for team workflow; led legacy HTML/jQuery -> React migration - Hired and onboarded junior engineers; designed and built B2B/B2C SaaS backend APIs (Laravel) Stack: PHP, Laravel, React, MySQL

PM for multiple web/app projects; directly handled iOS app development and App Store submissions. - Integrated APNs push notifications and StoreKit auto-renewable subscription payments - Analyzed App Store review policy to pass review while keeping an external payment structure Stack: Swift, Xcode, iOS, StoreKit, APNs

Developed a 3D LiDAR-based catenary line auto-generation library for power transmission lines (patent registered). - Built internal AutoCAD tooling and asset management programs using AutoLISP and C# Stack: AutoLISP, C#, AutoCAD, 3D LiDAR