Senior Backend Engineer (Python & FastAPI)

This is a remote position.

Job Title: Senior Backend Engineer (Python & FastAPI)

Experience: 6+Yrs

Location: Remote

Timing: 5:30 PM to 2:30 AM IST

Notice Period: Immediate Joiners Only

Role Overview

We are seeking a Senior Backend Engineer with strong expertise in Python and FastAPI to design and scale a high-performance document-processing backend. The system will handle large, complex PDFs and support AI-driven classification workflows.

Key Responsibilities

• Design and develop backend services to reliably process large PDF documents (200+ pages)

• Implement AI-driven document classification using taxonomy-based models with confidence scoring

• Build and maintain document taxonomies for classification, grouping, and validation logic

• Enable multi-page document assembly using taxonomy rules and page-level signals

• Develop robust exception handling mechanisms (fallback flows, “needs review” pipelines)

• Implement audit trails and data lineage, including taxonomy versioning and classification rationale

• Optimize system performance to ensure scalability and cost-efficient AI inference

• Support loan processing workflows by classifying and validating borrower documents (KYC, income proofs, bank statements, agreements, etc.)

Required Skills & Experience

• 4+ years of hands-on experience in Python development

• Strong expertise in FastAPI for backend services

• Experience with PDF processing libraries such as PyPDF2, pdf2image, or similar

• Hands-on experience integrating LLM APIs (preferably GPT-4 Vision or similar)

• Experience working with Google Cloud Platform (GCP):

•

• Cloud Storage

• Firestore

• Cloud Tasks

• Strong understanding of:

• Asynchronous job processing (queues, workers, retry logic)

• Error handling and fault tolerance

• Data lineage and audit systems

• Experience in:

• Document taxonomies / classification schemas

• OCR or document processing systems

• AI-driven workflows and structured labeling systems

Preferred Qualifications

• Background in financial services or compliance-driven environments

• Experience with:

• Taxonomy versioning

• Confidence thresholds

• Rules-based validation systems