امیرمحمدمیرزایی‌راد

UnoPay solves the fragmentation and brittle integration challenges of Iranian payment gateways by providing a strongly-typed, single-entrypoint client architecture. Built entirely on standard Web Fetch primitives with zero external runtime dependencies, it runs identically in Vercel Edge, Cloudflare Workers, Node.js 18+, Bun, and Deno.

Pluggable Adapter Pattern & Universal Fetch Runtime

The SDK centers on the UnoPay orchestrator client parameterized over configured gateway keys. Each payment provider implements a standardized GatewayAdapter interface exposing uniform createPayment and verifyCallback signatures. Provider-specific payload quirks, error codes, and currency variations are isolated inside adapters, preventing external leakage.

• Universal Runtime: 100% standard Fetch API compatible with Cloudflare Workers, Vercel Edge, Bun, Deno, and Node.js.
• Strict Zero-Any Typing: Gateway identifiers and response schemas are strictly inferred and autocompleted.
• Automatic Currency Normalization: Seamlessly handles IRR, IRT, and TOMAN conversions.

Testing payment workflows in Iranian software development has historically required live test credentials, manual card simulations, or unstable staging endpoints. IPG Sandbox is a zero-setup, self-hosted emulation suite that mirrors the REST and SOAP APIs of major payment gateways (Zarinpal, IDPay, Behpardakht Mellat), allowing developers to test approve, decline, timeout, refund, and verify-fail scenarios deterministically in local dev and CI/CD pipelines.

Dual-Plane Simulation Engine with Deterministic State Machine

Architected into a high-performance Python FastAPI engine and a Next.js inspection dashboard. The engine intercepts standard gateway endpoints, models transactions through a persistent state machine, and evaluates header-driven scenario rules (X-Sandbox-Scenario) without modifying production code under test.

• 18-Cell Scenario Matrix: 6 realistic outcomes (approve, decline, timeout, refund, pending_settle, verify_fail) across 3 gateway adapters.
• Zero External Dependencies: Runs fully offline via Docker Compose without external internet access or credit cards.
• Fault-Injection via Headers: Non-invasive testing without changing application business logic.

Linkschin is a high-throughput search and media aggregator designed to extract direct download links, split RAR game archives, and audio previews from complex Iranian media portals without routing media bandwidth through the server. Built as a unified Turborepo monorepo uniting a Next.js web application with an asynchronous Python FastAPI extraction engine.

Decoupled Headless Extraction & Direct Streaming Pipeline

Designed with strict separation between link discovery and media delivery. The backend handles distributed web scraping, anti-bot bypass, archive structure parsing, and link resolution, while direct file transfers stream strictly between the client and upstream CDNs, eliminating server bandwidth bottlenecks.

• Zero-Proxy Bandwidth Architecture: Server processes only lightweight JSON metadata while media downloads stream directly from CDNs.
• Multi-Part Archive Intelligence: Automatically groups split game volumes and identifies required archive passwords.
• Turborepo Polyglot Monorepo: Orchestrates Node.js/TypeScript frontend and Python backend tooling seamlessly.

KarStack is an end-to-end recruitment platform and career intelligence aggregator. It continuously crawls and normalizes tech job postings across Iranian hiring boards into a centralized database, offering advanced search filters (tech stack, salary range, remote status, seniority), applicant tracking, and administration tools.

Polyglot Monorepo with Relational Ingestion Engine

Structured as a Turborepo monorepo housing a Python FastAPI REST API with SQLModel/PostgreSQL and three Next.js applications (Public Web, User Dashboard, Admin Dashboard). Shared UI design tokens, Radix UI primitives, and TypeScript types are managed in shared workspace packages.

• Structured Job Normalization: Unifies disparate posting formats into a clean schema with parsed skill requirements.
• Multi-Workspace Monorepo: Single repository coordinating 3 Next.js applications and shared UI design system packages.
• Strict Postgres Target: Built specifically for PostgreSQL 17 with psycopg3 driver for maximum query performance.

Novent Backend is an enterprise-grade distributed microservices platform engineered for high-concurrency event handling and financial transactions. Utilizing Hexagonal Architecture (Ports and Adapters) with Command Query Responsibility Segregation (CQRS), it decouples domain logic from external transport layers while ensuring sub-millisecond data synchronization via Apache Kafka and Debezium Change Data Capture (CDC).

Hexagonal (Ports & Adapters) Microservices with CQRS & Event-Driven CDC

Composed of an API Gateway, Core Business Service, and Financial Service communicating via gRPC and Kafka. Database changes to PostgreSQL are streamed in real-time by Debezium into Kafka topics, where search workers ingest them into Meilisearch, maintaining eventual consistency without application-level double writes.

• Strict Hexagonal Architecture: Complete decoupling of Domain, Application, Infrastructure, and Presentation layers.
• CQRS Command/Query Separation: Separates read-heavy query pipelines from write-heavy command handlers.
• Change Data Capture (CDC): Debezium connector monitoring Postgres WAL for reliable, atomic event propagation without dual-write bugs.