Umar Bilal

Backend developer

Paisol Technologies • Part-time

Aug 2025 - Jan 2026 • 5 mos

I worked in Paisol techonologies with these achievements: Designed and implemented scalable backend architectures for AI-powered applications, integrating LLM APIs (OpenAI GPT, Anthropic Claude, or open-source models) to enable intelligent features such as summarization, conversational agents with context oriented features, document analysis worth more than 1000 pages. Built robust RESTful and GraphQL APIs to serve LLM-generated responses, handling high-throughput requests with sub-second latency through caching strategies and asynchronous processing. Developed prompt engineering pipelines with dynamic templating, context management, and response validation to ensure consistent, safe, and accurate model outputs across production use cases. Implemented rate limiting, authentication, and cost monitoring for LLM API consumption, reducing operational costs by 50% through intelligent request batching and model selection logic. Designed and maintained vector database integrations Pinecone for Retrieval-Augmented Generation (RAG), enabling LLMs to query proprietary knowledge bases with improved factual accuracy. Orchestrated background job processing using Celery/Redis or AWS, Vercel for asynchronous LLM tasks such as batch document processing, embeddings generation, and fine-tuning data preparation.

Medical Billing Excecutive

Zee IT Services • Full-time

Apr 2024 - Jan 2026 • 1 yr 9 mos

As a dedicated Medical Billing Executive with two years of specialised experience, I managed the full revenue cycle for a Local MD Urgent Care. My role focused on optimising financial performance by ensuring clean claim submission, reducing denial rates, and maintaining strict adherence to payer contracts and regulatory guidelines. Key Responsibilities & Achievements: Revenue Cycle Management (RCM): Managed billing operations for a portfolio of 20 providers, overseeing the complete lifecycle from patient registration to final payment posting. Claims Processing & Coding: Reviewed and submitted over 300 claims monthly, utilizing ICD-10, CPT, and HCPCS Level II codes. Ensured medical necessity was met to prevent payer rejections. Denial Management: Analyzed denial trends to identify root causes (authorization issues, coding mismatches). Implemented corrective action plans that reduced the overall denial rate by 10% within the first year. Payer Communication: Served as the primary point of contact for insurance payers (including Aetna, Cigna, UnitedHealthcare, and BCBS) to resolve complex billing issues, verify benefits, and negotiate payment discrepancies. Patient Account Resolution: Addressed patient inquiries regarding statement balances, set up payment plans, and educated patients on their financial responsibilities, maintaining a high level of customer service while improving collection rates. Compliance: Maintained up-to-date knowledge of HIPAA regulations, CMS guidelines, and payer-specific billing requirements to ensure 100% compliance and protect the practice from audit risks