Available for work

ZAND KARIM

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Architecting high-availability distributed systems with .NET 8 and Node.js.
Based in Iraq, building for the world.

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~30% Less Technical Debt 40% Faster API Response 5,000+ Users Served 60% Less Server Load #1 In Graduating Class 5+ Years of Experience ~30% Less Technical Debt 40% Faster API Response 5,000+ Users Served 60% Less Server Load #1 In Graduating Class 5+ Years of Experience

About

Strategic Senior Software Engineer with over 5 years of experience architecting high-availability distributed systems. Expert in .NET 8 with Clean Architecture and Node.js with NestJS. Proven track record in engineering event-driven microservices, optimizing geospatial routing engines, and managing complex financial logic. Ranked #1 out of 34 in graduating class. Specialized in bridging complex backend systems with modern React and mobile frontends.

Experience

Where I've
built things.

KUBAK

Senior Software Engineer

July 2025 — Present

Architected modular REST API with .NET 8 and Clean Architecture (Orchestration, Processing, Foundation layers) — ~30% reduction in technical debt

Engineered event-driven order processing with RabbitMQ + MassTransit for reliable async microservice communication

Built high-performance logistics routing engine with PostGIS + NetTopologySuite for real-time driver-to-order matching

Developed Financial Adjustment engine with EF Core — ACID-compliant, multi-currency

Optimized PostgreSQL with advanced indexing, eliminated N+1 queries — 40% faster response times

American University of Iraq

Full-Stack Developer

2022 — 2025

Led development of "Advising" and "Purchasing" systems (NestJS + React) serving 5,000+ users

Implemented Redis caching — 60% reduction in server load during peak registration

Engineered RBAC with JWT/Passport across academic departments

Containerized full stack with Docker for dev/prod parity

Skills & Expertise

My
toolkit.

Backend & Architecture

.NET 8C#NestJSNode.jsClean ArchitectureSOLIDDDDMicroservices

Databases & Cache

PostgreSQLPostGISMySQLRedisTypeORMEF Core

Messaging & Async

RabbitMQMassTransitSocket.ioEvent-Driven Design

Frontend & Mobile

ReactJSReduxTailwind CSSFlutterFirebase

DevOps & Cloud

DockerLinuxCI/CDGitSwagger/OpenAPI

Testing & Security

Unit TestingJWT/PassportBcryptRate LimitingHelmet

Projects

Selected
work.

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Real-Time Finance

Bourse

Real-time financial system monitoring global currency fluctuations with sub-second updates via Socket.io, ultra-fast caching with ioredis, and location-based mapping for exchange office density visualization.

NestJSMySQLRedisSocket.io

Education

SD Math

High-engagement educational app with custom-built animation timing for complex math visualizations. Recognized as a top-tier practice tool for its unique "shape and movement" cognitive learning logic.

FlutterCustom Animation Engines

Education