Hi, I'm Touseef ur Rehman, a Backend Lead and Senior Full-Stack Developer with 7.5+ years of experience building scalable, high-performance web applications and distributed systems. I have delivered 15+ production-grade projects, including 6 enterprise platforms across social media, health-tech, music, and marketplace domains. I specialize in Node.js, PHP/Laravel, React.js, PostgreSQL, MySQL, MongoDB, Redis, RabbitMQ, and cloud services such as AWS S3, AWS Lambda, Step Functions, GCP APIs, and Firebase FCM. I excel at event-driven architectures, asynchronous processing, and scalable backend systems. I also have experience training AI/LLMs and RLHF workflows, including prompt engineering, model evaluation, and response quality analysis for code-generation models. I enjoy leading backend teams, conducting code reviews, and collaborating with cross-functional teams to deliver optimized and reliable solutions.

Touseef ur Rehman

Hi, I'm Touseef ur Rehman, a Backend Lead and Senior Full-Stack Developer with 7.5+ years of experience building scalable, high-performance web applications and distributed systems. I have delivered 15+ production-grade projects, including 6 enterprise platforms across social media, health-tech, music, and marketplace domains. I specialize in Node.js, PHP/Laravel, React.js, PostgreSQL, MySQL, MongoDB, Redis, RabbitMQ, and cloud services such as AWS S3, AWS Lambda, Step Functions, GCP APIs, and Firebase FCM. I excel at event-driven architectures, asynchronous processing, and scalable backend systems. I also have experience training AI/LLMs and RLHF workflows, including prompt engineering, model evaluation, and response quality analysis for code-generation models. I enjoy leading backend teams, conducting code reviews, and collaborating with cross-functional teams to deliver optimized and reliable solutions.

Available to hire

Hi, I’m Touseef ur Rehman, a Backend Lead and Senior Full-Stack Developer with 7.5+ years of experience building scalable, high-performance web applications and distributed systems. I have delivered 15+ production-grade projects, including 6 enterprise platforms across social media, health-tech, music, and marketplace domains. I specialize in Node.js, PHP/Laravel, React.js, PostgreSQL, MySQL, MongoDB, Redis, RabbitMQ, and cloud services such as AWS S3, AWS Lambda, Step Functions, GCP APIs, and Firebase FCM.

I excel at event-driven architectures, asynchronous processing, and scalable backend systems. I also have experience training AI/LLMs and RLHF workflows, including prompt engineering, model evaluation, and response quality analysis for code-generation models. I enjoy leading backend teams, conducting code reviews, and collaborating with cross-functional teams to deliver optimized and reliable solutions.

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Experience Level

Expert
Expert
Expert
Expert
Expert
Expert
Expert
Expert
Expert
Expert
Expert
Expert
Expert
Expert
Expert
Expert
Expert
Expert
Intermediate
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Work Experience

Backend Lead at Posh Enterprise (Ogoul Technology) - Remote
July 1, 2023 - Present
Led and developed an enterprise social media platform (Twitter/X-like) using Laravel + Node.js/Express.js with MySQL and PostgreSQL, featuring event-driven architecture and RabbitMQ messaging. Implemented REST APIs and real-time messaging via Socket.IO with end-to-end encryption, plus a media pipeline using FFmpeg enhanced by AWS Lambda and Step Functions for scalable asynchronous processing. Resolved news feed bottlenecks, achieving 200–300ms response times through schema optimization, query tuning, Redis caching, and prefetched APIs. Integrated PoshDetect AI-powered content moderation with Google Translate for multilingual content safety. Built a React admin portal for moderation and monitoring. Enforced coding standards via code reviews. Used Cloudflare R2 for object storage and Firebase FCM/APNs for cross-platform push notifications.
LLM Trainer (AI Training) at Turing
April 1, 2024 - August 1, 2024
Contributed to RLHF workflows for Large Language Models focused on code generation across JavaScript, Python, C++, and SQL by designing adversarial and edge-case prompts. Evaluated LLM-generated outputs for instruction-following, accuracy, logical reasoning, code correctness, efficiency, and optimization, while providing detailed feedback, response rankings, and ideal solutions to improve model performance. Collaborated in prompt engineering, dataset curation, response annotation, and AI quality evaluation to enhance model alignment, coding reliability, and response quality for coding-focused AI systems.
Senior Software Engineer at Softech Systems Limited
April 1, 2021 - June 30, 2023
Contributed to backend and frontend development of KT Messenger (1M+ users) and WNSocial, a social networking platform. Implemented real-time features including chat, voice/video calling, feeds, and notifications using WebRTC and Socket.IO with message encryption. Built and optimized scalable Node.js/Express and Laravel APIs with MongoDB/MySQL for low-latency performance under high user loads. Developed responsive React.js interfaces and supported content-driven features like feeds, media sharing, and user interactions. Followed Agile practices, ensuring code quality through Repository Pattern, code reviews, and Git-based workflows.
Software Engineer at Coding Pixel, Lahore
December 1, 2018 - April 1, 2021
Developed and maintained full-stack web applications using Laravel, PHP, MySQL, and Vue.js, delivering scalable solutions from concept to deployment. Implemented real-time features (chat, notifications) using Socket.IO. Integrated Stripe, PayPal, and Google Maps. Contributed to payment system integrations, subscription models, and multi-vendor marketplace logic. Implemented live video sessions using Vonage (TokBox).

Education

BSc in Computer Science at Punjab University, Lahore
January 11, 2030 - January 1, 2016
MSc in Computer Science & Software Engineering at Superior University, Lahore
January 11, 2030 - January 1, 2018

Qualifications

Industry Experience

Software & Internet, Media & Entertainment, Professional Services, Healthcare, Education, Retail