I'm Emran Hejazi

An early-stage startup building an AI-powered, adaptive language-learning platform around learners' real-world goals.

• Build the backend foundation with NestJS, Fastify, and TypeScript, keeping API contracts and domain responsibilities clearly defined.
• Develop backend authentication flows, session management, and ownership checks, backed by PostgreSQL and Drizzle migrations.
• Implement the initial course-creation and learner Home APIs with validated contracts and safeguards against duplicate requests.
• Maintain automated backend quality checks, API documentation, and container-based staging delivery as the platform evolves.

A large-scale eCommerce platform aiming for a smooth and efficient shopping experience.

• Optimized core customer purchase journeys on a high-traffic storefront, resolving UI state inconsistencies to improve overall system reliability and conversion rates.
• Enhanced front-end performance by refactoring complex, bloated components and eliminating redundant React re-render cycles on critical paths.
• Introduced a highly responsive, reusable component library to establish layout uniformity and significantly reduce front-end design regression debt.
• Collaborated closely with backend engineers to align API integration contracts, standardizing type-safe error boundaries and resolving production deployment blockers.

A Persian eCommerce company with a responsive storefront and an administration workspace for retail operations.

• Designed and developed the Persian storefront and administration workspace as the company's solo developer.
• Built product discovery, comparison, customer accounts, and checkout with transactional inventory and payment verification.
• Implemented a shared payment interface across 13 provider adapters, an append-only wallet ledger, and tag-versioned Redis caching.
• Created a responsive RTL interface with localized pricing, light and dark themes, and catalog-connected shopping assistance.

A growing perfume brand focused on high-quality fragrances and wellness products.

• Architected and deployed a modular full-stack eCommerce platform utilizing Next.js and Spring Boot (Kotlin), designed for long-term scalability and structured catalog expansion.
• Engineered an automated multi-currency and multi-language translation engine that integrates live exchange rate APIs to deliver seamless localized customer experiences.
• Developed an administrative Content Management System (CMS) featuring granular role-based access control (RBAC), enabling secure self-serve catalog updates for non-technical staff.
• Established a unified design system and shared component library leveraging structured SCSS mixins, accelerating visual consistency and front-end development velocity.

A startup building customizable NFC cards and digital profiles for personal and professional use.

• Engineered a low-latency interactive profile editor for customizable NFC cards, streamlining user customization workflows and reducing interaction friction.
• Built a template-driven dynamic rendering engine, enabling rapid integration of new visual layouts with zero regression risk to legacy templates.
• Implemented strict client-side validation rules and robust API contracts to ensure data integrity and prevent unexpected UI states.
• Refactored onboarding and card-design flows based on interaction telemetry data, resulting in a substantial reduction in user drop-off rates.

A company providing renewable energy solutions and IoT-enabled smart devices.

• Engineered high-performance real-time telemetry dashboards for smart IoT devices, optimizing visual data layouts for on-site technicians.
• Designed a highly resilient Bluetooth Low Energy (BLE) connection recovery module featuring exponential backoff, ensuring data continuity in metallic environments.
• Refactored mobile state management using Jetpack Compose and Kotlin Flows, ensuring consistent 60fps UI rendering on legacy field hardware.
• Hardened exception handling and state synchronization mechanisms, eliminating application crashes during network dropouts and high-frequency telemetry bursts.