UMAR JAMIL / PERSONAL PORTFOLIOPRODUCT THINKING × PRODUCTION ENGINEERING

Senior Full-Stack & AI Engineer

Hi, I’m Umar.I build productswith purpose.And intelligence.

I turn complex problems into products people use. Nine years across commerce, full-stack engineering, and production AI.

Explore my work

Umar Jamil, Senior Full-Stack and AI Engineer — **Umar Jamil**Lead AI Systems Engineer · Silo Tech

EXPERIENCE ACROSS

LenovoCetaphilZALORAEmotivAccentureSilo Tech

01 / SELECTED WORK

Less talk. More shipped.

Real projects, real impact — measurable results across commerce, SaaS, and production AI.

Featured

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AI / SaaSLive

PPC Autopilot

Research and run Amazon PPC end-to-end — reverse-engineer competitor keywords, get AI bid suggestions, and let an idempotent rules engine sync changes back to Amazon automatically.

Next.jsTypeScriptAmazon Ads API v3ClaudePostgreSQL

View case study

AI / Open Source

Hallucination Guard

Public on GitHub. Drop-in integration with existing LLM pipelines, designed for production AI teams that need reliability guarantees.

PythonLLM EvaluationRAG+2

View case study

AI / Real-Time SystemsLive

Emotiv — Brain-Computer Interface Platform

Sub-100ms end-to-end latency on neural data streams. Live at emotiv.com.

ReactNode.jsWebSockets+2

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E-CommerceLive

ZALORA

Reduced page load times by 40% through API and database optimization. Live across ZALORA's regional storefronts.

ReactNode.jsPostgreSQL+1

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E-CommerceLive

Lenovo Singapore

Lenovo's flagship Singapore storefront. Live at lenovo.com/sg.

ReactNode.jsMongoDB+1

View case study

E-CommerceLive

Cetaphil Singapore

Galderma's regional Cetaphil site for Singapore. Live at cetaphil.com.sg.

ReactNode.jsPostgreSQL+1

View case study

E-CommerceLive

Anantara Resort — Uluwatu Bali

Direct-booking experience for Anantara's Uluwatu Bali property. Live at anantara.com.

ReactNode.jsPostgreSQL+1

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SaaS / FintechLive

Escape Planner

Live SaaS with free and paid tiers (Stripe). Shareable debt-free plans and PDF export.

Next.jsTypeScriptChart.js+2

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SaaS / FintechLive

Setlary — Earned Wage Access

Live EWA product in Malaysia with employer and employee solutions and App Store / Google Play apps.

ReactReact NativeNode.js+1

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SaaSLive

Grouu Baby Foods

Indonesia's first subscription baby food brand. Live at grouu.id.

ReactNode.jsMongoDB+1

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SaaSLive

UOA Group Malaysia

Real estate portfolio for UOA Group Malaysia. Live at uoa.my.

ReactNode.jsPostgreSQL+1

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Have a system that needs shipping?

Full-stack platforms, AI infrastructure, or both — let's talk.

Start your project View my experience

02 / SYSTEMS I BUILD

The interface is only
the visible layer.

Useful AI is a connected system: a thoughtful experience on top of reliable data, orchestration, and guardrails.

OrchestrationTool calling, workflows, retries, and human approval at the right moment.

03 / TRY THE THINKING

A small taste of
production AI.

Type a product problem. This local prototype turns it into an observable system brief, the same way I approach production AI work.

Runs entirely in your browser. No prompt or personal data leaves this page.

Your product problem

Try an example

04 / WALKTHROUGHS

See the thinking
behind the build.

Short visual summaries of the problem, the system, and the trade-offs behind selected work.

Case study preview

AI / SaaS

PPC Autopilot

Live AI SaaS. Research-to-automation in one place, with 24h idempotency so the same change never double-applies.

Case study preview

AI / Open Source

Hallucination Guard

Public on GitHub. Drop-in integration with existing LLM pipelines, designed for production AI teams that need reliability guarantees.

Case study preview

E-Commerce

ZALORA

Reduced page load times by 40% through API and database optimization. Live across ZALORA's regional storefronts.

02 / THE APPROACH

Good products
start with better
questions.

I work across the whole system, connecting product decisions to the engineering that makes them possible.

Inside my process

Find the real problem.

Start with the people, constraints, and decisions behind the brief. Get clear on what needs to change.

Make it tangible.

Turn the idea into a working prototype. Test the riskiest assumptions before building around them.

Build for the real world.

Connect the interface, data, and intelligence. Make the system observable, maintainable, and ready to ship.

03 / WHAT I BRING

One engineer.
The whole
picture.

From the first interaction to the systems behind it. I bring product thinking and engineering depth to the same table.

Full-Stack Web Engineering

End-to-end product engineering — Next.js, React, Node.js, TypeScript. From design system to API to deployment. Shipped commerce and content platforms for Lenovo, Cetaphil, and Anantara.

Lenovo Singapore

SaaS & Subscription Platforms

Multi-tenant SaaS, billing, retention loops, and admin tooling. Built the subscription engine behind Grouu and the enterprise platform behind UOA Group.

Grouu Baby Foods

AI Systems & RAG

Production LLM pipelines — retrieval, evaluation, and observability. Author of Hallucination Guard, an open-source toolkit for catching hallucinated outputs in real systems.

Hallucination Guard

Real-Time & Performance

Low-latency pipelines, WebSocket data streams, and high-throughput services. Built the real-time data layer powering Emotiv's brain-computer interface platform.

Emotiv

Cloud & DevOps

AWS architecture, Dockerized services, and CI/CD pipelines. Training in advanced AWS development and DevOps. Reduced deployment cycles by 40% at CUE Group.

Engineering Leadership

Currently leading AI systems work at Silo Tech. Previously led multi-tenant SaaS development for 10+ startups at CUE Group. Mentored, hired, and shipped.

04 / OPEN NOTEBOOK

Built to be shared.

Public artifacts of what I build and how I reason about systems.

Hallucination Guard

chumarjamil/hallucination-guard

Open-source toolkit (CLI, SDK, API) for detecting and mitigating hallucinations in LLM outputs.

Python

—

How I Build

/how-i-build

Engineering notes on how I architect production systems — from full-stack platforms to AI infrastructure.

Engineering essays

05 / THE JOURNEY

Experience that
builds perspective.

Nine years connecting the dots between commerce, product engineering, and production AI.

May 2025 - PresentCurrent chapter

Lead AI Systems Engineer

Silo Tech (formerly Saakuru Labs) / EU - Remote

Leading development of production-grade AI systems leveraging LLMs and agentic architectures. Designing and deploying autonomous, multi-step agent workflows with tool orchestration for enterprise clients.

Sep 2022 - Jan 2025

Senior Full Stack Developer

CUE Group / Singapore

Led development of multi-tenant SaaS platforms for 10+ startups. Designed Dockerized services with CI/CD pipelines (GitHub Actions), improving deployment efficiency by 40%.

Oct 2021 - Sep 2022

Full Stack Engineer

Accenture / Kuala Lumpur, Malaysia

Built secure, high-performance APIs for Google and Meta (Facebook) internal tools. Developed complex React applications with modern state management, improving UX efficiency by 25%.

Sep 2019 - Oct 2021

Software Engineer

ZALORA Group / Kuala Lumpur, Malaysia

Developed high-performance e-commerce modules using Node.js and React. Reduced load times by 40% through API and DB optimization. Collaborated with cross-functional teams to deliver scalable solutions.

Jun 2017 - Jul 2019

Software Engineer

Zeeruk International Pvt. Ltd. / Islamabad, Pakistan

Migrated legacy applications to React and Node.js stack. Refactored backend services, improving performance by 25%. Contributed to multiple client projects with modern full-stack development practices.

Education 01 / +

Bachelor's Degree in Software Engineering

University of Engineering and Technology · 2013 - 2017

Completed comprehensive study in Software Engineering with focus on Full Stack Development, Software Architecture, Database Systems, and Modern Web Technologies.

Certifications 08 / +