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I am a backend engineer focused on designing scalable systems and optimizing performance for millions of users. I specialize in microservices, distributed architectures, and building robust APIs that scale under high load. I have built AI-powered SaaS platforms, integrated with OpenAI, ElevenLabs, Twilio, and Stripe, and I have unified multiple AI microservices into efficient backends. I also deploy and manage AWS infrastructure and lead cross-functional teams to deliver product releases ahead of schedule.…I am a backend engineer focused on designing scalable systems and optimizing performance for millions of users. I specialize in microservices, distributed architectures, and building robust APIs that scale under high load. I have built AI-powered SaaS platforms, integrated with OpenAI, ElevenLabs, Twilio, and Stripe, and I have unified multiple AI microservices into efficient backends. I also deploy and manage AWS infrastructure and lead cross-functional teams to deliver product releases ahead of schedule.

Han Sheng Liang

PRO

Full Stack Developer, Blockchain Developer, AI Engineer, +5

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I am a backend engineer focused on designing scalable systems and optimizing performance for millions of users. I specialize in microservices, distributed architectures, and building robust APIs that scale under high load. I have built AI-powered SaaS platforms, integrated with OpenAI, ElevenLabs, Twilio, and Stripe, and I have unified multiple AI microservices into efficient backends. I also deploy and manage AWS infrastructure and lead cross-functional teams to deliver product releases ahead of schedule.…I am a backend engineer focused on designing scalable systems and optimizing performance for millions of users. I specialize in microservices, distributed architectures, and building robust APIs that scale under high load. I have built AI-powered SaaS platforms, integrated with OpenAI, ElevenLabs, Twilio, and Stripe, and I have unified multiple AI microservices into efficient backends. I also deploy and manage AWS infrastructure and lead cross-functional teams to deliver product releases ahead of schedule.

Available to hire

Kuantan, Malaysia

I am a backend engineer focused on designing scalable systems and optimizing performance for millions of users. I specialize in microservices, distributed architectures, and building robust APIs that scale under high load.

I have built AI-powered SaaS platforms, integrated with OpenAI, ElevenLabs, Twilio, and Stripe, and I have unified multiple AI microservices into efficient backends. I also deploy and manage AWS infrastructure and lead cross-functional teams to deliver product releases ahead of schedule.

Skills

Experience Level

Expert

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Language

English

Fluent

Malay

Fluent

Work Experience

Senior Back-End Engineer at MMIVIP

October 1, 2024 - October 8, 2025

Developed 3+ AI-driven SaaS platforms supporting voice agents, integrating OpenAI, ElevenLabs, Twilio, and Stripe; handled 10,000+ daily API calls with <300ms latency; architected scalable back-end services in Express.js, Go, and GraphQL; consolidated 5+ AI microservices into a unified Rails backend, reducing infrastructure costs and improving maintainability; implemented Retrieval-Augmented Generation (RAG) & Google Search API for AI agents, increasing accuracy and reducing response time; deployed AWS infrastructure (EC2, Lambda, RDS, S3) ensuring high uptime; optimized real-time data pipelines using Redis & WebSockets; automated AI voice agent workflows using Vapi, n8n, Synthflow; led cross-functional collaboration with AI/ML, frontend, and DevOps teams.

Lead Back-End & AI/ML Engineer at Arkmind

August 1, 2023 - October 8, 2025

Led a team of 5 engineers in designing and deploying a Loan Origination System (LOS) & Loan Management System (LMS), reducing loan approval times by 65% and processing $50M+ in loan volume annually. Architected high-performance back-end services in Express.js and GraphQL, improving API response times by 40% and supporting 5,000+ concurrent users with OAuth 2.0 security. Integrated AI/ML models (TensorFlow, OpenAI, NLP) to automate credit risk scoring & fraud detection, increasing approval accuracy by 30% and reducing defaults by 19.9%. Optimized AI inference on edge devices using NVIDIA Jetson for real-time decision-making in loan processing. Containerized services with Docker & Kubernetes, reducing deployment time by 50% and improving CI/CD efficiency.

Junior Front-End Developer Intern at Arkmind

July 1, 2022 - October 8, 2025

- Built responsive, accessible UIs with React.js, TypeScript, and CSS3 - Improved Lighthouse scores for SEO and accessibility. Optimized web performance with code-splitting, lazy loading, and memoization, reducing page load time. - Integrated RESTful APIs to power real-time dashboards, handling 1,000+ dynamic data requests/day with efficient state management. - Containerized front-end apps with Docker to streamline CI/CD, and collaborated with UX/UI designers to implement pixel-perfect, mobile-first designs.