Evnek Technologies Pvt Ltd - Senior Backend Engineer (Python / FastAPI)

Back-End Developer is needed in Bengaluru, India.

Client: Evnek Technologies Pvt Ltd

Location: Bengaluru, KA, in

Contract: Part-time

Job Description

This is a remote position for a Senior Backend Engineer specializing in Python and FastAPI. The candidate will have 4+ years of experience and must be an immediate joiner.

Key Responsibilities

• Design and develop scalable backend services to reliably process large PDFs (200+ pages).
• Implement AI-based document classification workflows using defined taxonomies and confidence scoring models.
• Design, version, and maintain document taxonomies that drive classification, grouping, and validation logic.
• Support multi-page document assembly based on taxonomy-driven rules and page-level metadata.
• Integrate LLM APIs (preferably GPT-4 Vision) for document analysis and intelligent classification.
• Build robust asynchronous job workflows using background workers, queues, retry logic, and task orchestration.
• Implement strong exception handling mechanisms, including fallback paths and “needs review” workflows.
• Ensure comprehensive audit trails, data lineage tracking, and classification rationale logging.
• Optimize backend performance, system architecture, and AI inference usage to control infrastructure costs.
• Support loan processing workflows by classifying and validating borrower documents (KYC, income proofs, bank statements, agreements) using taxonomy-driven rules and confidence thresholds.

Requirements

• 4+ years of hands-on experience with Python.
• Strong production experience with FastAPI.
• Proven experience with PDF processing libraries (PyPDF2, pdf2image, or similar).
• Experience integrating LLM APIs for document analysis or classification (GPT-4 Vision API preferred).
• Hands-on experience with Google Cloud Platform (GCP), including:
• Cloud Storage
• Firestore
• Cloud Tasks
• Strong understanding of asynchronous job patterns, including:
• Background workers
• Task queues
• Retry and failure recovery mechanisms
• Solid systems thinking with emphasis on:
• Error handling
• Data lineage
• Audit trails
• Experience designing or working with:
• Document taxonomies
• Classification schemas
• Structured labeling systems for AI workflows
• Experience with OCR or document intelligence systems.
• Exposure to financial services, loan processing, or compliance-oriented projects.

Preferred Qualifications

• Experience with taxonomy versioning and rule-based validation systems.
• Familiarity with confidence thresholds and AI-assisted decision workflows.
• Background in compliance-heavy environments requiring auditability.
• Experience building cost-efficient AI-powered backend architectures.

What We’re Looking For

• A backend engineer who thinks in terms of systems, architecture, and failure modes, not just APIs.
• Strong ownership mindset toward edge cases, long-running workflows, and exception handling.
• Ability to translate ambiguous document inputs into structured, explainable, and auditable outputs.
• Comfortable working in a document-heavy, AI-assisted backend environment.
• Self-driven professional capable of thriving in a remote, part-time engagement.