Danish Sharjeel

Backend & AI Engineer with 4+ years of experience building scalable systems, APIs, and AI-powered pipelines. Specialized in Python (FastAPI, Django), async architecture, and vector search (Qdrant). Proven track record of optimizing database performance, implementing production-grade RAG applications, and delivering reliable backend infrastructure for remote teams.

Software Engineer at Verticalsols (2024-09 – Present)

• Architected a FastAPI-based backend platform serving ~40k active users, handling core feature delivery and resolving critical performance bottlenecks.
• Optimized data ingestion and real-time messaging services, improving system throughput and response times by ~35% via async processing.
• Engineered Qdrant-based retrieval pipelines for contextual search, reducing average query latency by ~40% through indexing and caching.
• Integrated LLM-powered pipelines for automated text, speech, and image processing, enabling advanced sentiment analysis and classification workflows.
• Scaled legacy Django services to handle ~1M requests per day, performing database tuning to stabilize p95 latency at ~120ms.
• Mentored 2 junior developers on backend architecture, production debugging, and writing clean, maintainable code.

Software Engineer at Maxcore Technologies (2022-12 – 2024-08)

• Architected backend services for a multi-tenant B2B document management platform, strictly enforcing data isolation and multi-tenant access control.
• Designed file ingestion and document routing pipelines, improving system throughput by ~30% via batching and async processing.
• Optimized multi-tenant PostgreSQL database schemas, reducing query latency by ~25% through strategic indexing and query tuning.
• Spearheaded background job processing utilizing Celery and Redis to handle intense workflows like document conversion and automated reporting.
• Refactored legacy monolithic Python components into microservices, cutting server resource utilization by ~20%.
• Integrated third-party payment and SaaS platforms (Stripe, PayPal), building resilient webhook processors with automated retry mechanisms.

Full Stack Developer at ORM Digital Solutions (2021-05 – 2022-11)

• Engineered robust REST APIs and backend services using Django and Node.js to power high-traffic client-facing applications.
• Optimized PostgreSQL and MySQL database architectures through indexing and schema refinements, significantly accelerating query performance.
• Automated complex data processing and reporting workflows utilizing Python and Pandas, eliminating manual overhead for client teams.
• Spearheaded the containerization of applications via Docker and established CI/CD pipelines for automated deployments to AWS and DigitalOcean.

Bachelor of Science in Software Engineering – Virtual University of Pakistan