---
title: "Robin Singh - Senior Software Engineer in Greater Bengaluru Area | Tal"
description: "Meet Robin Singh, AI/LLM Engineer | Backend Engineer (Python) @ HirePro | LangGraph Agents, RAG, Prompt Engineering, LLM Evaluation | Django, Celery | Speech AI (STT/TTS) | Ex-Samsung R&D based in Greater Bengaluru Area. AI stack includes claude code, claude, and langchain. Explore public work link..."
image: "https://tal.club/meet/robin-singh-1/share-image"
---

# Robin Singh on Tal

## Headline

AI/LLM Engineer \| Backend Engineer \(Python\) @ HirePro \| LangGraph Agents, RAG, Prompt Engineering, LLM Evaluation \| Django, Celery \| Speech AI \(STT/TTS\) \| Ex\-Samsung R&D

## About

I build production LLM systems in Python — agents, retrieval and the AI pipeline behind an automated technical\-interview platform running on OpenAI GPT\-4o/GPT\-5\. What that involves: → Agents and retrieval — I am the sole engineer on HirePro's AI Proctoring agent: a LangGraph agent with RAG retrieval \(OpenAI embeddings, Redis vector store, header\-aware chunking\), tool calling and WebSocket streaming, answering candidate queries live during proctored tests\. → LLM pipeline — I own core subsystems of an AI interview platform: adaptive question generation, real\-time answer evaluation, automated feedback synthesis\. Python, Django, Celery, multi\-tenant\. → Cost engineering — cut LLM operating cost \~40% via task\-tiered model routing \(GPT\-5 nano/mini/full by task complexity\), restructuring prompts to qualify for OpenAI prompt caching, and token\-level cost telemetry on every LLM, STT and TTS call\. → Evaluation before assumption — I built an offline harness that A/B tests candidate models and prompts against real production transcripts\. No model migration ships without measured quality evidence\. → Reliability — migrated free\-text prompts to strict Structured Outputs with Pydantic / JSON Schema contracts, eliminating malformed\-model\-output failures in production\. → Speech \+ multilingual — interviews across 20\+ languages with regional STT/TTS and audio caching, plus an authenticity detection flow that flags AI\-assisted and plagiarised answers\. Earlier at HirePro I built centralized incident\-management APIs unifying 4\+ incident types, key rotation for encryption of candidate PII, and enterprise vendor\-callback integrations\. Before that, at Samsung R&D Institute \(PRISM\), I developed a spaCy\-compatible Hindi language model with FastText vectors over 50,000\+ vocabulary terms, powering a Rasa assistant at 93% intent accuracy\. Promoted to Senior Software Engineer within 20 months\. Open to conversations about AI/LLM engineering and Python backend roles\. robinsingh051s@gmail\.com

## Location

Greater Bengaluru Area

## AI stack

claude code

claude

langchain

langgraph

langsmith

openai

## Work experience

Senior Software Engineer at HirePro, Jul 2025 \- Present · 1 yr 3 mos, Bengaluru, Karnataka, India · Hybrid, • Sole engineer on HirePro's AI Proctoring agent — a LangGraph agent with RAG retrieval \(OpenAI embeddings, Redis vector store, header\-aware chunking\), tool calling and WebSocket streaming, answering candidate queries live during proctored tests\. • Own core subsystems of the LLM pipeline \(Python / Django / Celery\) behind an AI interview platform running end\-to\-end technical interviews on OpenAI GPT\-4o/GPT\-5 — adaptive question generation, real\-time answer evaluation and automated feedback synthesis\. • Cut LLM operating cost by \~40% via task\-tiered model routing \(GPT\-5 nano/mini/full by task complexity\), restructuring prompts to qualify for OpenAI prompt caching, and token\-level cost telemetry across every LLM, STT and TTS call\. • Engineered an offline evaluation harness that A/B tests candidate models and prompts against real production transcripts, gating every migration on measured quality instead of assumption\. • Eliminated malformed\-model\-output failures in production by migrating free\-text prompts to strict Structured Outputs with Pydantic / JSON Schema contracts\. • Shipped multilingual interviews across 20\+ languages with regional STT/TTS and audio caching, plus an authenticity detection flow flagging AI\-assisted and plagiarised answers\. • Contributing to platform architecture and code review, and mentoring 3\+ junior engineers on debugging and system design\. Resolved 50\+ critical production issues across the assessment and interview flows\.

Software Engineer at HirePro, Nov 2023 \- Jul 2025 · 1 yr 9 mos, Bengaluru, Karnataka, India · Hybrid, • Built centralized incident\-management APIs in Python/Django unifying 4\+ incident types across ATS and assessment operations, plus the backend APIs powering the AI Proctoring feature\. • Implemented key rotation for encryption/decryption of candidate PII, and a centralized mediaService preventing unauthorized media access across assessment applications\. • Delivered enterprise integrations — vendor callback systems and client\-specific assessment configurations for a major enterprise client — plus React\.js UI work and browser\-extension security tooling that hardened assessment integrity\.

Software Engineer Intern at Synthesis Systems Inc\., Mar 2023 \- May 2023 · 3 mos, Bengaluru, Karnataka, India, \- Developed authentication, database management, and RESTful CRUD APIs for inventory management of 1,000\+ products\. \- Implemented CSV export functionality and conducted 100% API test coverage in Postman, ensuring reliability before deployment\.

Prism Project Intern at Samsung R&D Institute India, Jul 2021 \- Feb 2022 · 8 mos, Bengaluru, Karnataka, India, • Developed a spaCy\-compatible Hindi language model with FastText word vectors over 50,000\+ vocabulary terms, powering a Rasa conversational assistant at 93% intent accuracy\. • Awarded a Samsung PRISM excellence certificate for the project\.

## Education

Bachelor of Engineering \- BE, Computer Science, Cambridge Institute of Technology

## Public links

- github: https://github\.com/singh051
- leetcode: https://leetcode\.com/robinsingh051s

[View the original profile](https://tal.club/meet/robin-singh-1)

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