Sachin Burman
Builder · Operator · Product
Back to All WorkCase Study 06 / 010
AI & AutomationIn ProductionTimeline: 2023 – 2024

AI Recruitment & Voice Screening System

Automated Phone Interviews & Candidate Screening

My Direct Role

Automation Builder & Developer

01 / 01Autonomous AI Voice Recruitment Pipeline
Case Study
AI Recruitment & Voice Screening System - Autonomous AI Voice Recruitment Pipeline

Full event-driven n8n workflow orchestrating ATS resume intake, OpenAI GPT-4 evaluation, ElevenLabs conversational voice agents, and Twilio telephony dispatch.

Phone Interviews

100% Automated

Candidate Feedback

Same Day (<24h)

Question Style

Resume-Based

Call Reliability

Smart Auto-Retries

Project Overview

High-volume outbound recruiting faces acute bottlenecks in candidate screening: manual resume triage is inconsistent, scheduling calls consumes hours, and candidate qualification data is scattered across spreadsheets. This system provides a resilient, autonomous pipeline from application submission to structured candidate scorecards.

The Problem

Recruiters spent 70% of their operational bandwidth conducting repetitive 10-minute screening calls to confirm baseline qualification (CRM experience, call targets, notice periods) and scheduling logistics.

Solution & Approach

I designed a complete automation pipeline orchestrating Google Workspace, n8n webhook pipelines, ElevenLabs Conversational Voice Agents, Twilio telephony, and OpenAI evaluation prompts. Candidates submit their ATS resume and select a 24-hour interview slot. At the scheduled time, the voice agent conducts an interview with contextual questions derived from their resume, transcribes the dialogue, and scores the candidate against strict rubrics.

Architecture & System Flow

1

Applicant Intake: Clean ATS application form capturing candidate credentials and preferred call window.

2

n8n Workflow Engine: Manages webhook routing, state validation, queuing, and exponential backoff retry logic.

3

ElevenLabs Conversational AI & Twilio: Voice agent executes dynamic telephone screening based on resume analysis.

4

LLM Evaluation Engine: Evaluates responses, verifies claimed experience, and outputs a 1–100 score with rubric breakdowns.

5

Live HR Dashboard: Real-time candidate pipeline displaying statuses, audio review links, and progression verdicts.

Key Capabilities & Features

Automated resume parsing and job-criteria matching
Contextual question generation tailored to individual candidate work history
Interactive 2-way phone interview using realistic voice synthesis
Speech-to-text transcription with timestamped sentiment and confidence analysis
Structured candidate evaluation (Score, Summary, Red Flags, Verdict)
Automated alerting and recovery handling for missed calls or network dropouts

Operational Retrospective & Lessons

Conversational voice agents require defensive failure management: network dropouts, ambient background noise, and ambiguous candidate responses require explicit fallback triggers and human escalation loops rather than pure automation dogma.

Project Specifications

Category

AI & Automation

Deployment Status

In Production

Timeline

2023 – 2024

Core Role

Automation Builder & Developer

Verified Technology Stack
n8n OrchestrationElevenLabs Conversational AIOpenAI GPT-4Twilio APIPython / WebhooksGoogle Apps Script
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Have a problem worth solving?

Whether you want to automate repetitive workflows, build a custom e-commerce tool, or need a hands-on partner for product and operations, I'd love to connect.

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