I'm a senior backend engineer with over a decade of experience developing scalable software systems using Python. I've led teams, built production-grade APIs, and delivered cloud-native applications in both startup and enterprise environments. My recent work focuses on building intelligent retrieval systems powered by LLMs, all while maintaining high standards in design, deployment, and developer collaboration.

Hasnain Yousuf

I'm a senior backend engineer with over a decade of experience developing scalable software systems using Python. I've led teams, built production-grade APIs, and delivered cloud-native applications in both startup and enterprise environments. My recent work focuses on building intelligent retrieval systems powered by LLMs, all while maintaining high standards in design, deployment, and developer collaboration.

Available to hire

I’m a senior backend engineer with over a decade of experience developing scalable software systems using Python. I’ve led teams, built production-grade APIs, and delivered cloud-native applications in both startup and enterprise environments. My recent work focuses on building intelligent retrieval systems powered by LLMs, all while maintaining high standards in design, deployment, and developer collaboration.

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Experience Level

Expert
Expert
Expert
Expert
Expert
Expert
Expert
Intermediate
Intermediate
Intermediate
Intermediate
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Language

English
Fluent
Urdu
Fluent

Work Experience

Senior Software Engineer at 248.AI
May 1, 2025 - Present
Led the development of an LLM-powered system that retrieves answers from structured document data using a RAG-based architecture. Responsibilities included parsing multi-format documents, intelligent chunking, and building a scalable pipeline for contextual querying. Designed chunking, storage, and query architecture using FastAPI and Supabase. Integrated LlamaParse for parsing documents and OpenTelemetry for observability. Deployed scalable services using Google Cloud Run and Hono.dev frontend.
Principal Software Engineer at Sled (YC S21)
May 31, 2025 - July 16, 2025
Designed and maintained microservices architecture using FastAPI and ArangoDB. Managed containerized deployments on AWS ECS, including CI/CD pipelines. Integrated BI tools into core product modules and conducted customer-facing sessions. Mentored junior engineers and led agile development cycles. Focused on backend architecture with tight feedback loops from users and integration with advanced graph databases.
Senior Software Engineer at Stellic
August 31, 2022 - July 16, 2025
Worked on core educational planning tools enabling advisors and students to interact through scheduling and feedback systems. Developed Google and Microsoft calendar integrations in Django using DRF. Worked on key product modules including session planning, advisor management, and auth services. Contributed in deployments of backend system in AWS.
Co-Founder at Tookspot
May 31, 2025 - July 16, 2025
Architected and deployed a smart booking platform for managing in-person reservations. Developed and scaled Tookspot's backend system using Django and PostgreSQL. Managed AWS infrastructure including EC2, RDS, and S3. Collaborated on product design and business strategy decisions. Ensured system availability and maintainability for production use.
Senior Software Engineer at NexDegree
October 31, 2021 - July 16, 2025
Architected web applications using Django and Flask. Developed REST APIs for forecasting tools and analytics dashboards. Collaborated with DevOps and data teams for system integration.
Senior Software Engineer at Diya Interactive AB
November 30, 2019 - July 16, 2025
Led full-stack development of video platforms and user-generated content pipelines for Swedish markets. Built APIs for video and content delivery platforms. Integrated Lua with Nginx for streaming, used FFmpeg for video processing. Set up Redis-based socket systems and ElasticSearch for content retrieval. Deployed and maintained cloud infrastructure on DigitalOcean and GCP.
Software Engineer at Diya Interactive AB
January 31, 2018 - July 16, 2025
Developed APIs using Yii 2.0 and created visual dashboards for KPI tracking. Built IoT projects with Raspberry Pi and Python. Created educational mobile games using C++ and Cocos2dx.
PHP Developer at Inforox Pvt Ltd
January 31, 2017 - July 16, 2025
Developed Laravel apps and jQuery-powered frontends for auto industry clients. Managed cloud deployments on VPS (Cloudways, DigitalOcean).
PHP Developer at Alisons Technology
April 30, 2015 - July 16, 2025
Built internal web tools including employee, inventory, and queue management systems. Used Yii framework for modern backend development.
PHP Developer at Crystallite Pvt Ltd
June 30, 2016 - July 16, 2025
Built deployment automation tools and web-based Linux firewall controls. Created RFID-based school management systems and server monitoring integrations. Focused on building automated server provisioning and monitoring systems.
Senior Software Engineer at 248.AI
May 1, 2025 - Present
Led the development of an LLM-powered system that retrieves answers from structured document data using a RAG-based architecture. Responsibilities included leading backend and retrieval pipeline development, designing chunking, storage, and query architecture using FastAPI and Supabase, integrating LlamaParse for multi-format document parsing and OpenTelemetry for observability, and deploying scalable services using Google Cloud Run and Hono.dev frontend.
Principal Software Engineer at Sled (YC S21)
May 31, 2025 - July 22, 2025
Designed and maintained microservices architecture using FastAPI and ArangoDB. Managed containerized deployments on AWS ECS including CI/CD pipelines. Integrated BI tools into core product modules and conducted customer-facing sessions. Mentored junior engineers and led agile development cycles while working on intelligent cataloging and automation tools.
Senior Software Engineer at Stellic
August 31, 2022 - July 22, 2025
Worked on core educational planning tools enabling advisors and students to schedule appointments and interact through feedback systems. Implemented Google and Microsoft calendar integrations using Django and DRF. Contributed to deployment of backend on AWS and collaborated with different EdTech teams focused on US universities.
Co-Founder at Tookspot
May 31, 2025 - July 22, 2025
Architected and deployed a smart booking platform for managing in-person reservations. Responsibilities included backend development using Django and PostgreSQL, managing AWS infrastructure (EC2, RDS, S3), collaborating on product design and business strategy, and ensuring system availability and maintainability.
Senior Software Engineer at NexDegree
October 31, 2021 - July 22, 2025
Architected web applications using Django and Flask and developed REST APIs for forecasting and analytics dashboards. Collaborated with DevOps and data teams for system integration in data-driven web applications.
Senior Software Engineer at Diya Interactive AB
November 30, 2019 - July 22, 2025
Led full-stack development of video platforms and user-generated content pipelines for Swedish markets. Integrated Lua with Nginx for streaming, used FFmpeg for video processing, set up Redis-based socket systems and ElasticSearch for content retrieval, and deployed cloud infrastructure on DigitalOcean and GCP.
Software Engineer at Diya Interactive AB
January 31, 2018 - July 22, 2025
Developed APIs using Yii 2.0 and created visual dashboards for KPI tracking. Built IoT projects with Raspberry Pi and Python, and created educational mobile games using C++ and Cocos2dx.
PHP Developer at Inforox Pvt Ltd
January 31, 2017 - July 22, 2025
Developed Laravel applications and jQuery-powered frontends for auto industry clients. Managed cloud deployments on VPS platforms including Cloudways and DigitalOcean.
PHP Developer at Alisons Technology
April 30, 2015 - July 22, 2025
Built internal web tools for employee, inventory, and queue management using Yii framework targeting HR and operations domains.
PHP Developer at Crystallite Pvt Ltd
June 30, 2016 - July 22, 2025
Developed deployment automation tools and web-based Linux firewall controls. Created RFID-based school management systems and server monitoring integrations focusing on automated server provisioning and monitoring.
Senior Software Engineer at 248.AI
May 1, 2025 - Present
Led the development of an LLM-powered system that retrieves answers from structured document data using a RAG-based architecture. This involved parsing multi-format documents, chunking them intelligently, and building a scalable pipeline for contextual querying. Responsibilities included leading backend and retrieval pipeline development, designing chunking, storage, and query architecture with FastAPI and Supabase, integrating LlamaParse for document parsing and OpenTelemetry for observability, and deploying scalable services using Google Cloud Run and Hono.dev frontend.
Principal Software Engineer at Sled (YC S21)
May 1, 2025 - July 22, 2025
Drove the design and development of microservices that powered intelligent cataloging and automation tools. Work involved deep backend architecture with tight feedback loops from users and integration with advanced graph databases. Designed and maintained microservices architecture using FastAPI and ArangoDB, managed containerized deployments on AWS ECS including CI/CD pipelines, integrated BI tools into core product modules, conducted customer-facing sessions, mentored junior engineers, and led agile development cycles.
Senior Software Engineer at Stellic
August 31, 2022 - July 22, 2025
Worked on core educational planning tools enabling advisors and students to interact through scheduling and feedback systems. Collaborated with different teams of an EdTech startup mainly for US universities, worked on Google and Microsoft calendar integrations in Django using DRF, developed key product modules such as session planning, advisor management, and auth services, and contributed to backend system deployments on AWS.
Co-Founder at Tookspot
May 1, 2025 - July 22, 2025
Architected and deployed a smart booking platform for managing in-person reservations. Responsibilities spanned backend engineering, AWS deployment, and strategic product decisions. Developed and scaled backend system using Django and PostgreSQL, managed AWS infrastructure including EC2, RDS, and S3, collaborated on product design and business strategy decisions, and ensured system availability and maintainability for production use.
Senior Software Engineer at NexDegree
October 31, 2021 - July 22, 2025
Contributed to building data-driven web applications particularly for forecasting and analytics. Architected web applications using Django and Flask, developed REST APIs for forecasting tools and analytics dashboards, and collaborated with DevOps and data teams for system integration.
Senior Software Engineer at Diya Interactive AB
November 30, 2019 - July 22, 2025
Led full-stack development of video platforms and user-generated content pipelines for Swedish markets. Led a full-stack dev team building APIs for video and content delivery platforms, integrated Lua with Nginx for streaming, used FFmpeg for video processing, set up Redis-based socket systems and ElasticSearch for content retrieval, and deployed and maintained cloud infrastructure on DigitalOcean and GCP.
Software Engineer at Diya Interactive AB
January 1, 2018 - July 22, 2025
Worked on backend systems and interactive educational content targeting children. Developed APIs using Yii 2.0 and created visual dashboards for KPI tracking, built IoT projects with Raspberry Pi and Python, and created educational mobile games using C++ and Cocos2dx.
PHP Developer at Inforox Pvt Ltd
January 1, 2017 - July 22, 2025
Developed Laravel apps and jQuery-powered frontends for auto industry clients. Managed cloud deployments on VPS (Cloudways, DigitalOcean) and developed platforms for UK’s automobile sector using Laravel.
PHP Developer at Alisons Technology
April 30, 2015 - July 22, 2025
Built various internal web tools across multiple domains including HR and operations using Yii framework for backend development.
PHP Developer at Crystallite Pvt Ltd
June 30, 2016 - July 22, 2025
Focused on building automated server provisioning and monitoring systems. Built deployment automation tools, web-based Linux firewall controls, RFID-based school management systems, and server monitoring integrations.

Education

Bachelor of Science at Virtual University Paksitan
January 1, 2016 - December 31, 2019
Bachelor of Science at Virtual University Paksitan
January 1, 2016 - December 31, 2019
Bachelor of Science (BSc) at Virtual University Paksitan
January 1, 2016 - December 31, 2019
ACCP Pro at Aptech Education Center
January 1, 2012 - December 31, 2016

Qualifications

English Speaking – C2
January 1, 2023 - January 31, 2023
FastAPI – The Complete Course
March 1, 2022 - March 31, 2022
English Speaking – C2
January 1, 2023 - January 31, 2023
FastAPI – The Complete Course
March 1, 2022 - March 31, 2022
English Speaking – C2
January 1, 2023 - January 31, 2023
FastAPI – The Complete Course
March 1, 2022 - March 31, 2022

Industry Experience

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