Sheikh Shapon

AI / LLM & Backend Engineer with 7+ years of experience building scalable backend systems and production-grade AI pipelines. Specializes in RAG architectures, leveraging vector databases like Pinecone and evaluation frameworks (Ragas) to deliver accurate, context-aware LLM applications and reduce hallucinations. Experienced in orchestrating multi-model LLM systems (OpenAI API, Google Gemini) within FastAPI microservices, backed by cloud-native infrastructure (AWS/GCP), IaC (AWS CDK, Terraform), and automated CI/CD pipelines.

Lead Freelance AI & Software Engineer at Self-Employed (2026-01 – Present)

• Built agentic AI and RAG pipelines
• Automated data enrichment systems
• Delivered high-accuracy B2B lead systems

AI / LLM Engineer (Backend Focus) — Remote at The Insights Company (New York, USA via Upwork) (2025-05 – 2025-12)

• Built production RAG pipelines
• Developed LLM evaluation frameworks
• Implemented FastAPI AI microservices
• Managed AWS cloud infrastructure
• Developed distributed web search agents
• Created vector retrieval systems

Data Engineer / Backend Lead (remote) at Torrance Analytics LLC (California, USA via Upwork) (2024-10 – 2025-04)

• Developed Elasticsearch search systems
• Built distributed ETL pipelines
• Automated cloud deployments

Python Data / Backend Engineer (remote) at ICS Inc. (Chicago, USA via Upwork) (2023-08 – 2024-09)

• Built secure backend systems
• Implemented CQRS architecture
• Integrated payment systems

Senior Backend Software Developer (onsite) at Yo Tech Ltd. (Sylhet, Bangladesh) (2020-10 – 2023-07)

• Built food delivery backend systems
• Scaled cloud infrastructure
• Developed payment processing systems

Full-Stack Developer (onsite) at Profile Ltd. (Dhaka, Bangladesh) (2018-04 – 2020-09)

• Built full-stack web applications
• Developed scalable backend systems
• Integrated secure payment processing

M.Sc in Big Data Science and Technology – University of Bradford (2025-09)

B.Sc in Information Technology – International Open University, IOU (2018-08)