Backend Lead / Architect · Islamabad · Open to relocation

Jawad Ul Hadi

AI-first systems design

Seven years building multi-tenant SaaS backends in NestJS, TypeScript and PostgreSQL. I design AI features to fail predictably: a three-tier fallback of retry, retrieval and a rule-based floor keeps them working through provider outages.

Work with me Read the case study

years on production backends

12s → 2s

dashboard response time, an 83% cut

user-facing AI failures during LLM outages

99.9%

uptime through live multi-tenant migrations

Selected work

Client systems are under NDA. Architecture is described without business data or endpoints.

Featured · Resilience pattern

Designing for AI failure

One abstraction sits in front of OpenAI, Gemini and Anthropic. When a provider degrades, requests step down through three tiers instead of surfacing an error. It became the team's standard failure-handling architecture and cut AI integration complexity by 60%.

Request

Provider gateway

OpenAI · Gemini · Anthropic

Tier 1

Retry & failover

Backoff, then the next provider

Tier 2

RAG fallback

Answer from retrieved context

Tier 3

Rule-based floor

Deterministic, never hard-fails

Read the full case study →

Projects & open source

Personal builds, public and verifiable.

Flagship · Developer tooling

Chrome extension pack

Ten Manifest V3 extensions for developer and AI workflows: context extraction for agents, an API interceptor and mock sandbox, a schema and JWT decoder, a prompt workbench with diffing, token and cost estimates, a document scraper, a cross-LLM model switcher, a webhook relay, session isolation and a browser workflow recorder.

Chrome Extension API · TypeScript · Gemini API · WebSockets · IndexedDB

Infrastructure

Idempotent queue spine

A BullMQ and Redis backbone for OCR extraction, batch email and multi-tenant webhook dispatch, with HMAC signature verification, dead-letter queues and exactly-once processing.

BullMQ · Redis · NestJS · HMAC

The Qeloma suite

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Experience

Stack & credentials

Education B.S. Computer Science, Government College University, Faisalabad, 2018

Certifications

Each links to the issuer's verification page.

Services & contact

Let's build something resilient together.

Open to Backend Lead, Solutions Architecture and AI Platform roles, remote, hybrid or relocating. Every way to reach me lives on one page.

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