Case studies

Realproductionwork,realoutcomes

A look at shipped engagements — AI voice platforms, revenue ops automation, and custom engineering that went into production and moved the numbers.

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Shipped work

Engagements we put into production

PreCallAI

Voice AI / Telephony

PreCallAI: AI Voice Platform with 100+ Language STT

Engineer Master Labs built PreCallAI's AI call center platform end-to-end — a custom multilingual STT with ~100ms latency, Whisper Large v3 Turbo as Language ID, and a streaming voice pipeline tuned for telephony audio.

100+

Languages supported (per client launch)

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QCall.ai

Conversational AI / Sales Automation

QCall.ai — Production AI Voicebot Platform

A full-stack AI voicebot with ~100ms STT, 50+ languages, Whisper Large v3 Turbo as LID, natural interruption handling, and a campaign orchestrator — built for QCall.ai to run automated sales and support calls at scale.

50+

Languages (Whisper v3 Turbo LID)

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Voice-AI platform

Sales Intelligence / Voice AI

Pre-Call Synthesis: Multi-Source Enrichment + Validation Run

A pre-call enrichment engine that scrapes data from multiple sources, synthesizes a brief for the AI agent, and runs a validation pass before the call is placed — so no call goes out cold.

12+

Enrichment sources integrated

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Confidential fintech client

Fintech / Algorithmic Trading

AI-Driven Trading Platform with Signal Intelligence

A production algorithmic trading platform combining quantitative signals, real-time news and sentiment analysis via LLMs, and execution management with built-in risk controls.

~200ms

Signal-to-execution latency

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Conversational AI platform

Developer Tools / Conversational AI

Open-Source Conversational AI Flow — Whisper + Llama Pipeline

A flow-based conversational AI application built entirely on open-source STT and LLM models — zero vendor lock-in, full data sovereignty, production-ready orchestration.

~70%

Inference cost saving vs proprietary APIs

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Voice-first SaaS client

Voice AI / Media

Multilingual TTS Model — 40+ Languages, 100+ Dialects, <300ms Latency

A production multilingual TTS with voice cloning — 40+ languages, 100+ dialects, and <300ms latency. ElevenLabs-class quality, self-hosted, trained on 8×H100 GPUs.

SaaS / AI Productivity

Memory-RAG SaaS — Long-Term Context for AI Agents

A memory-focused RAG platform that gives AI agents durable, structured long-term memory across sessions — so chatbots and copilots stop forgetting the things that matter.

~60%

Token cost reduction vs naive RAG

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AI platform client

ML Engineering / AI Platform

LLM Fine-Tuning Pipeline with Unsloth — 2x Faster, 50% Less VRAM

A production LLM fine-tuning pipeline built on Unsloth — we fine-tune domain-specific LLMs on a 4× L4 GPU machine with 2x speed-up and ~50% VRAM reduction vs baseline, plus an evaluation harness that blocks quality regressions.

Training speed-up via Unsloth

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Web3 engagement platform

Web3 / Crypto / Community

AI-Graded Crypto Reward System for User Feedback

A crypto reward system where user feedback is scored by AI for quality and authenticity, and rewards are paid on-chain — with an adversarial layer to resist gaming and bots.

~8x

High-quality feedback volume growth

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EdTech startup

EdTech / Consumer

AI Tutor Platform — AskFilo-Style Learning with AI Bots

A mobile-first AI tutoring platform in the AskFilo style — students snap a question, an AI bot parses it, and a subject-expert agent walks them through a step-by-step solution with optional voice interaction.

~90%

Step-accuracy on benchmark set

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RevenueCaptain

RevOps / B2B SaaS

RevenueCaptain — AI Automation for Revenue Ops

An AI-powered revenue operations automation layer for RevenueCaptain — cutting manual work across lead scoring, pipeline hygiene, and outreach so the team could scale without adding headcount.

~25 hrs/week

Manual RevOps work eliminated

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FareOf

Email Infrastructure / SaaS

FareOf — Unlimited Email Verification API at $40/mo

Engineer Master Labs built FareOf end-to-end — the unlimited email verification API, 100M+ lead database, developer portal, and billing — priced flat at $40/month instead of per-verification.

500+

Paying customers at launch

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60db.ai

Voice AI / Developer Platform

60db.ai — Full-Stack AI Voice Platform (TTS + STT + Voice Cloning + Agents)

Engineer Master Labs built 60db.ai end-to-end — a unified AI voice platform with TTS (30 languages, 1000+ voices), STT (40+ languages), voice cloning from 3 minutes of audio, and AI voice agents — with 150ms latency, 99.9% uptime, and pay-as-you-go pricing. Positioned as the voice AI platform for India.

150ms

TTS latency

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