Mahsa Mohajer

Frontend System Design Builder

Answer up to 28 questions about your project and get a live architecture diagram with a complete tech stack rationale you can use to align your team or document your decisions.

React State Management in 2026

A complete engineering reference covering every major state management solution, modern architecture patterns, performance analysis, TypeScript DX, and real-world recommendations for all team sizes.

~45 min read

React Server Components vs Client Components

A deep-dive engineering reference on RSC architecture, the server/client boundary, Server Actions, data flow patterns, and real-world Next.js App Router best practices for 2026.

~40 min read

Performance & Accessibility in React

Production-grade reference covering Core Web Vitals, rendering optimisation, bundle strategies, WCAG 2.1 compliance, and accessible React patterns for high-traffic applications.

~45 min read

Security in React & Next.js

A complete engineering reference for building secure React and Next.js applications. Covers XSS, CSRF, auth architecture, Next.js App Router security, CSP headers, supply chain risks, and production security checklists.

~45 min read

Data Fetching in React & Next.js

A complete engineering reference for modern data fetching. Covers RSC fetching, TanStack Query, SWR, caching architecture, Suspense streaming, performance patterns, and real-world production architecture for 2026.

~45 min read

React Rendering Patterns in 2026

A production-grade engineering reference covering every major rendering strategy: CSR, SSR, SSG, ISR, React Server Components, hydration, streaming, partial prerendering, and edge rendering with architecture trade-offs and decision frameworks.

~50 min read

Frontend Testing Strategy in 2026

A production-grade engineering reference for frontend testing. Covers unit testing with Vitest, React Testing Library, Playwright E2E, mocking strategies, accessibility testing, flaky test remediation, CI/CD integration, and enterprise-scale testing architecture.

~55 min read

Authentication & Authorization Architecture

A production-grade engineering reference for auth in modern React applications. Covers JWT, OAuth 2.0 + PKCE, refresh token flows, the BFF pattern, cookie security, RBAC, route guards, enterprise SSO, and secure auth patterns for 2026.

~55 min read

API Design for Frontend Engineers

A production-grade engineering reference covering REST, GraphQL, BFF architecture, frontend/backend contracts with OpenAPI and tRPC, versioning, pagination, caching, optimistic updates, error handling, real-time patterns, and API security.

~60 min read

Real-Time Systems in React

A production-grade engineering reference for real-time React applications. Covers WebSockets, SSE, adaptive polling, connection management, optimistic UI at scale, conflict resolution, collaborative architecture with Yjs, offline synchronisation, and scalable real-time patterns for 2026.

~60 min read

AI-Assisted Frontend Engineering

A production-grade handbook for integrating AI tools into React engineering workflows. Covers prompt engineering, architecture prompting, AI code review, debugging, validation pipelines, secure AI usage, and responsible practices for modern frontend teams in 2026.

~50 min read

Frontend Scalability & Team Architecture

A production-grade handbook for scaling frontend systems and teams. Covers feature-based architecture, domain-driven design, monorepos, micro-frontends, shared component systems, governance, ownership boundaries, release workflows, and enterprise frontend engineering for 2026.

~60 min read

React Forms Architecture

A production-grade handbook for form architecture in React applications. Covers React Hook Form, Zod schema validation, dynamic and multi-step forms, accessibility patterns, async validation, server-side validation, Server Actions, optimistic submissions, error handling, and scalable form system design for 2026.

~55 min read