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Hi, I’m Usama Junaid, a Senior Software Engineer with 8+ years of experience building production-grade SaaS and e-commerce systems. I currently work remotely with a US-based company, delivering AI-powered workflows, secure backend services, and high-throughput messaging platforms. Based in Karachi, Pakistan, I thrive in fully remote, async environments. I specialize in integrating LLMs with real-world systems—APIs, CRMs, payment gateways, and messaging platforms—and I’m comfortable owning complex systems end-to-end. I’m passionate about secure, scalable architectures and collaborating with distributed teams to deliver reliable software at scale.…Hi, I’m Usama Junaid, a Senior Software Engineer with 8+ years of experience building production-grade SaaS and e-commerce systems. I currently work remotely with a US-based company, delivering AI-powered workflows, secure backend services, and high-throughput messaging platforms. Based in Karachi, Pakistan, I thrive in fully remote, async environments. I specialize in integrating LLMs with real-world systems—APIs, CRMs, payment gateways, and messaging platforms—and I’m comfortable owning complex systems end-to-end. I’m passionate about secure, scalable architectures and collaborating with distributed teams to deliver reliable software at scale.

Usama Junaid

Web Developer, Programmer, Developer, +2

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Hi, I’m Usama Junaid, a Senior Software Engineer with 8+ years of experience building production-grade SaaS and e-commerce systems. I currently work remotely with a US-based company, delivering AI-powered workflows, secure backend services, and high-throughput messaging platforms. Based in Karachi, Pakistan, I thrive in fully remote, async environments. I specialize in integrating LLMs with real-world systems—APIs, CRMs, payment gateways, and messaging platforms—and I’m comfortable owning complex systems end-to-end. I’m passionate about secure, scalable architectures and collaborating with distributed teams to deliver reliable software at scale.…Hi, I’m Usama Junaid, a Senior Software Engineer with 8+ years of experience building production-grade SaaS and e-commerce systems. I currently work remotely with a US-based company, delivering AI-powered workflows, secure backend services, and high-throughput messaging platforms. Based in Karachi, Pakistan, I thrive in fully remote, async environments. I specialize in integrating LLMs with real-world systems—APIs, CRMs, payment gateways, and messaging platforms—and I’m comfortable owning complex systems end-to-end. I’m passionate about secure, scalable architectures and collaborating with distributed teams to deliver reliable software at scale.

Available to hire

Hi, I’m Usama Junaid, a Senior Software Engineer with 8+ years of experience building production-grade SaaS and e-commerce systems. I currently work remotely with a US-based company, delivering AI-powered workflows, secure backend services, and high-throughput messaging platforms. Based in Karachi, Pakistan, I thrive in fully remote, async environments.

I specialize in integrating LLMs with real-world systems—APIs, CRMs, payment gateways, and messaging platforms—and I’m comfortable owning complex systems end-to-end. I’m passionate about secure, scalable architectures and collaborating with distributed teams to deliver reliable software at scale.

Skills

Experience Level

Expert

Expert

Expert

Expert

Expert

Expert

Expert

Expert

Expert

Intermediate

Language

English

Fluent

Urdu

Fluent

Work Experience

Software Engineer at Code Warriors

August 1, 2021 - Present

Own and maintain production SaaS systems supporting messaging, AI, and communication workflows. Designed and deployed a private OpenAI-compatible LLM inference server (LocalAI) for secure AI processing. Built and deployed high-throughput SMS platforms using Laravel, Redis queues, and Infobip APIs. Led enterprise VoIP migration using Asterisk PBX with SIP trunking and failover. Implemented infrastructure security including firewalls, VPN-only access, and Fail2ban protection. Managed DNS architecture with primary/secondary replication and reverse DNS configuration.

Web Developer / IT Specialist at Dig icraft

August 1, 2019 - June 1, 2021

Developed and maintained full-stack web applications for multiple client projects. Converted UI mockups into responsive web interfaces using HTML, CSS, JavaScript, and AJAX. Designed and optimized databases to support scalable business operations. Provided IT support and resolved hardware/software issues to maintain operational efficiency.

Smart Contracts Developer at Agency 84

January 1, 2022 - Present

Developed and tested Ethereum smart contracts using Solidity. Collaborated on NFT and dApp projects with distributed development teams. Contributed to blockchain-based application architecture and UI integration.