創造する

MAHIMAI RAJA: Voice AI Engineer

Teaching machines to listen and speak.

I am Mahimai: a voice AI engineer who builds real-time agents, publishes the tools as open source, and writes about how it all works.

VOICE AI ENGINEERreal-time agents, LiveKit + Pipecat
OPEN SOURCE7 packages on PyPI, 4 on npm
AUTHORVoice Agents Handbook
ONTARIO, CANADAEST, mostly
Say hello
Always building with voice
Scroll
ドドド
第一章 · Chapter 01

What I Build

Voice-first AI systems that listen, understand, and respond. From real-time speech to production infrastructure.

FLAGSHIP

VOICE AGENTS

Conversational AI that listens, understands, and responds. Real-time voice agents for customer support, sales, and operations. On-prem and self-hostable by design.

LiveKitPipecatSIPWebRTCFastRTC
DATA

AI PIPELINES

RAG systems, LLM orchestration, and document intelligence. From ingestion to production-ready answers.

LangChainLangGraphFAISSQdrantPGVector
SYSTEMS

CLOUD INFRA

Scalable architecture on Azure, AWS, and GCP. Built to handle voice traffic at scale, with observability baked in.

AzureAWSGCPTerraformDocker
ドン!
第二章 · Chapter 02

Case Files

Things I have built and shipped: named products with real users, plus a live agent you can talk to right now.

CASE FILE 01

VOICECLAW

A voice agent built to increase tradesperson productivity: hands stay on the job while the agent handles the talking.

TRADES PRODUCTIVITY
HANDS-FREE

The work never stops for a screen.

CASE FILE 02

EASY LIFE

A Swiss apartment assistant serving residents 24/7: questions, requests, and escalations handled by voice, on infrastructure the client owns.

24/7 RESIDENT COVERAGE
ON-PREM / SELF-HOSTED

Residents get answers at 3am.

LIVE DEMOLive now

VOICE PLAYGROUND

Do not take my word for it. Talk to a live voice agent right now and judge the latency, the interruptions, and the reasoning yourself.

LIVE
BROWSER ONLY

The demo is the resume.

第三章 · Chapter 03

The Record

Seven roles, three arcs, every claim expandable. The full battle log from data science origins to running a voice AI agency.

CURRENT ARC

2025 - NOW
Sarnia, Canada

Principal AI Engineer

Mahimai AI Solutions

NA + EU

solo agency, clients retained 1yr+

OPEN PANEL +
  • Solo-lead conversational AI agency; onboarded clients across North America and Europe with active relationships beyond one year.
  • Focused on on-prem, self-hostable conversational applications.
  • Solved unique client problems with custom-built solutions.
  • Published open source voice AI packages (VoiceGateway, OpenRTC, voice-ai) to npm, PyPI, and GitHub.
  • Flagship builds: VoiceClaw (tradesperson productivity) and Easy Life (Swiss 24/7 apartment resident assistant).
CONTRACTMiami, US

Conversational AI Engineer

Healify AI

1M REQ/MO

production LLM voice + chat APIs

OPEN PANEL +
  • Built and deployed production FastAPI services processing over 1M monthly requests for LLM-based voice and chat.
  • Led CI/CD automation (GitHub Actions + Azure DevOps), cutting deployment time 70% and enabling bi-weekly releases.
  • Wrote 20+ pages of API documentation and integration guides used by partner engineers and internal GTM teams.
  • Implemented observability with structured logging and Prometheus metrics, reducing debugging time 40% and improving SLA compliance.
CONTRACTMaryland, US

Senior Backend Developer, AI/ML

Autobridge Systems

MTTR -60%

standardized logging + rollback

OPEN PANEL +
  • Delivered high-throughput APIs supporting inference for 5+ AI models across client applications.
  • Built reliable voice channel automation with SIP, WebRTC, and the open source FastRTC framework.
  • Created performance dashboards (uptime, latency, error rates) used by product managers and GTM for rollout planning.
  • Standardized error logging and rollback mechanisms, improving mean time to resolution by 60%.

TRAINING ARC

2023 - 2025
India

Gen AI Consultant

Future Smart AI

3 POC → CLIENTS

5 production demos shipped for GTM

OPEN PANEL +
  • Spearheaded enterprise-grade RAG pipelines, cutting document query latency 50% for 3 major clients.
  • Evaluated and optimized vector DB performance (FAISS, PGVector), lifting retrieval precision 18% on internal benchmarks.
  • Delivered 5 production-ready POC demos for GTM enablement; 3 led directly to client acquisition.
India

NLP Engineer

Textify.AI

250K DOCS/MO

Azure Document Intelligence pipelines

OPEN PANEL +
  • Built Python analytics pipelines processing 250K+ documents monthly with Azure Document Intelligence and Postgres.
  • Implemented real-time finance data pipelines with role-based access, cutting processing time 35%.
  • Ran A/B experiments and tracked KPIs across 3 client deployments, driving up to 20% higher engagement.

ORIGIN ARC

2019 - 2022
Singapore

Data Analyst Intern

National University of Singapore

92% ACC

real-time CV safety detection on edge

  • Developed and deployed CV models to Raspberry Pi edge devices, reaching 92% accuracy in real-time safety detection.
  • Tuned 5+ model variations to cut false positives 25%, improving reliability in lab experiments.
India

Junior Data Scientist

S.Tech Solutions

-60% MANUAL CHECKS

ML on edge for manufacturing analytics

  • Deployed ML models to Raspberry Pi for manufacturing analytics, reducing manual checks 60% in monitored environments.
  • Produced monthly reports and dashboards for 10+ stakeholders, driving decisions across 2 major projects.
カチカチ
第四章 · Chapter 04

Open Source

Code I have put into the world: repos people star, and packages you can install right now.

FEATURED REPOS

ペラペラ
第五章 · Chapter 05

Published Works

A book on production voice AI, and peer-reviewed research.

BOOK

Voice Agents Handbook

Building Production Voice AI with LiveKit

研究 · Peer-Reviewed

2024

A RAG-based Medical Assistant Especially for Infectious Diseases

ICICT 2024, Lalitpur, Nepal, pp. 1128-1133READ PAPER
2024

Classification of diabetes using ensemble machine learning techniques

Scalable Computing: Practice and Experience 25(4), 3172-3180READ PAPER
ゴゴゴ
第六章 · Chapter 06

Side Quests

Freelance commissions: scoped, shipped, and closed. Six of the most recent.

LangChain Optimization

LangChainPython

Refactored an LLM pipeline with Map-Reduce patterns, cutting latency 50% and improving agent reliability.

Voice Agent for Auto Shop

FastAPIWhisper

Delivered a fully open source, on-prem voice assistant for local business automation.

RAG for Document Ingestion

LangChainVector DB

Helped a startup ingest and index thousands of PDFs with a robust vector-store RAG system.

Slack Chatbot, OpenAI Assistant API

OpenAIDocker

Built a Slack-integrated internal support assistant on Assistant v2, deployed with Docker.

TensorFlow Federated Debugging

TensorFlow

Fixed critical dependency issues in an unmaintained research repo, unblocking academic deployment of privacy-preserving models.

CI/CD with AWS + Kong

AWS EKSKong

Automated a production deployment pipeline with Kong API Gateway, AWS EKS, and a FastAPI backend.

バーン!
第七章 · Chapter 07

Character Sheet

Stats, abilities, and seals. The full spec sheet.

NAME
MAHIMAI RAJA
CLASS
Voice AI Engineer
GUILD
Mahimai AI Solutions
BASE
Sarnia, Canada
EXP
5+ YRS
MISSION

Voice is the primary interface for most viable exchange. My mission is to help people communicate better using Voice AI.

ABILITIES
VOICE & REALTIME
LiveKitPipecatSIPWebRTCFastRTC
LLM & RAG
LangChainLangGraphRAG PipelinesOpenAI API
+7 MOREHugging Face TransformersEmbedding ModelsPineconeQdrantMossPGVectorFAISS
BACKEND
PythonFastAPIGo
+7 MOREJavaScriptSQLFlaskMicroservicesAuthN/AuthZPytestUnit Testing
INFRA & CLOUD
AzureDockerCI/CD
+6 MOREGCPGitHub ActionsTerraformMonitoringLoggingGit
DATA
PostgreSQLRedis
+1 MOREMongoDB
PASSIVE SKILLS
Technical WritingDeveloper MentoringStakeholder CommunicationSelf-Starter

認定 · Seals of Certification

ALL SEALS LINK TO VERIFIABLE CREDENTIALS

ゴゴゴ
最終章 · Final Chapter

Let's Talk

Want to talk voice AI, open source, or anything else? My inbox is open.

Say Hello ▶hello@mahimai.dev · +1 437 333 0676

Sharing knowledge is the only way technology grows.