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Engineering Achievements & Portfolio

A comprehensive overview of my technical footprint, ranging from zero-downtime enterprise migrations to building cloud-native financial systems from scratch.

Executive Summary

My engineering career is defined by two core capabilities: Scaling existing systems safely (as demonstrated by my work at a Logistics B2B) and Architecting new systems correctly from day one (as showcased in LZStock). Below is a deep dive into my professional track record and personal architectural experiments.

Logistics B2B: Production Scale & Refactoring​

B2B Logistics Platform | Operating across 4 countries | 24,000+ Merchants

At a logistics B2B, the primary engineering challenge was evolving a legacy monolithic system that had become a bottleneck for international expansion. My focus was on executing high-stakes migrations, optimizing database queries, and building resilient internal developer platforms (IDP) to support a rapidly growing engineering team.

Core Achievements​

  • Zero-Downtime Migration: Spearheaded the end-to-end migration from a legacy monolith to a decoupled Event-Driven Architecture (EDA) using Node.js and NATS JetStream. Executed a strict 4-phase soft launch, ensuring zero disruption to live operations.
  • Massive Throughput & Low Latency: Architected the Core Order system to handle extreme global scale, successfully scaling to 100M+ monthly requests (1.2k peak RPS) while strictly maintaining a P95 latency of under 100ms.
  • 15x Performance Optimization: Overhauled the database indexing and querying strategies, slashing P95 latency by 90% and delivering 15x faster responsiveness and halving AWS infrastructure costs.
  • Developer Velocity & Observability: Engineered an independent WebSocket Gateway to protect core REST APIs from connection churn. Built a multi-language Feature Toggle SDK ecosystem for Canary Releases, and implemented an AOP-based distributed tracing library that slashed Mean Time To Recovery (MTTR) by 90%.
  • Provider-Agnostic 3PL Integration: Abstracted complex vendor integrations into a unified Outsource Service using TypeScript Generics, reducing partner onboarding time by 40%.

Explore a logistics B2B Deep Dives:

LZStock: Financial System Architecture​

Cloud-Native Trading Ecosystem | Domain-Driven Design | Kubernetes

LZStock is a comprehensive financial system built from scratch. It serves as my architectural playground and proof-of-concept for implementing enterprise-grade engineering standards without the constraints of legacy code.

Core Achievements​

  • Clean Architecture & DDD: Designed a high-concurrency order matching engine in Go. Strictly enforced Dependency Inversion to completely decouple core financial rules from infrastructure, achieving highly testable and maintainable code.
  • Cloud Infrastructure (IaC): Automated the entire AWS/GCP cloud provisioning process using Terraform. Deployed the microservices ecosystem onto Kubernetes (GKE) with robust Liveness/Readiness probes.
  • Zero-Trust Security: Replaced traditional VPNs and exposed API gateways with Cloudflare Tunnels, establishing a strict Zero-Trust network boundary to protect internal microservices.
  • High-Performance Gateway: Built an API Gateway utilizing FastHTTP for protocol translation (REST to gRPC) and centralized Cross-Origin Resource Sharing (CORS) handling, shielding internal services from edge traffic volatility.

Explore the LZStock Deep Dives:

Full-Stack Foundations & Earlier Works​

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While my current focus is on backend architecture and cloud infrastructure, I possess a strong foundation in end-to-end full-stack development. These projects highlight my ability to own features from the database straight to the UI component.

E-Commerce Website Crafting & Enhancement​

  • Developed comprehensive, SEO-friendly e-commerce platforms.
  • Focused on optimized frontend asset delivery, state management, and seamless payment gateway integrations.

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Interactive Price Dashboard​

  • Built real-time administrative dashboards utilizing modern React paradigms.
  • Eliminated legacy Redux boilerplate by implementing localized state management with React Context API and custom hooks for complex data fetching.

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