Babar Saleh Hayat

Senior Engineer

Senior Engineer · Systems Architect

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Writing

Editorial notes from production engineering work

Practical writing on architecture tradeoffs, system reliability, and implementation patterns for teams shipping under pressure.

Multi-tenant RBAC Patterns That Age Well

Feb 12, 2026 · 8 min

Multi-tenant RBAC Patterns That Age Well

Practical RBAC patterns for multi-tenant SaaS products that avoid permission drift, data-leak risk, and policy sprawl over time.

  • Multi-tenant SaaS
  • RBAC
  • Security
SSE vs WebSockets for Real-time Product Workflows

Jan 30, 2026 · 7 min

SSE vs WebSockets for Real-time Product Workflows

A pragmatic framework for choosing SSE or WebSockets based on workflow shape, operational cost, and failure behavior.

  • Realtime Systems
  • SSE
  • WebSockets
Phoenix LiveView Performance Under Real Load

Jan 17, 2026 · 8 min

Phoenix LiveView Performance Under Real Load

Where LiveView performance bottlenecks usually appear and how to fix them without abandoning the productivity benefits.

  • Phoenix
  • LiveView
  • Performance
Typesense vs Algolia vs Postgres Search: Practical Tradeoffs

Dec 22, 2025 · 9 min

Typesense vs Algolia vs Postgres Search: Practical Tradeoffs

How to choose a search approach based on product stage, relevance needs, operational overhead, and budget realities.

  • Search
  • Architecture
  • Product Tradeoffs
Building Safe Agentic Execution Flows

Nov 28, 2025 · 8 min

Building Safe Agentic Execution Flows

A production-minded blueprint for agentic systems with approval gates, traceability, and controlled failure behavior.

  • Agentic Systems
  • AI Safety
  • Orchestration
MVP Architecture Decisions That Reduce Rewrite Risk

Oct 19, 2025 · 7 min

MVP Architecture Decisions That Reduce Rewrite Risk

Six early architecture decisions that preserve speed now while avoiding expensive rebuilds later.

  • MVP Engineering
  • Architecture
  • Delivery Strategy

Built for speed, clarity, and durable systems

© 2026 Babar Saleh Hayat. Senior Full-Stack Engineer, Solutions Architect, Founder & CEO.

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