v
v_sainani

Vishal Sainani

@v_sainani

Senior Backend Engineer for AI Voice and Real Time Systems

Pakistan
English, Urdu, Sindhi
About me
Senior backend engineer, 5+ years building production APIs, distributed workers and real-time systems for US, UK and Australian startups. Core stack: Node.js / NestJS (TypeScript) and Python / FastAPI on AWS, with MongoDB, Redis, RabbitMQ and Docker. I own the backend behind an AI voice platform sustaining 300+ concurrent sessions at sub-60ms. I can help with: - Backend APIs and microservices - Real-time systems: WebSockets, Redis pub/sub, queueing - AI voice agents, IVR and VoIP (FreeSWITCH, Asterisk, SIP) - Stripe billing, JWT auth, multi-tenant setups - AWS deployment and load testing... Read more

Skills

v
v_sainani
Vishal Sainani
Offline • 

See my services

AI Integrations
I will build an ai voice agent or IVR with freeswitch, asterisk and asr
From$250 / projectMore details
API & Integrations
I will build a scalable backend API and microservices with nestjs or fastapi
From$120 / projectMore details

Work experience

IDRAK_Ai Ltd

Senior Backend Engineer

IDRAK Ai Ltd

Dec 2023 - Present • 2 yrs 11 mos

Own backend services for a conversational voice-AI platform used by contact centres. Built a Python/FastAPI service handling 300+ concurrent AI voice-bot connections with MongoDB persistence and RabbitMQ publishing, Dockerised Python RabbitMQ workers for high-throughput bot workloads, and a Redis message processor sustaining 300+ concurrent tasks at sub-60ms. Shipped Node.js/NestJS + MongoDB REST APIs across bot automation, call-centre campaigns, DID management and VoIP products, with JWT auth, Stripe billing and Redis pub/sub over WebSockets. Integrated a production AI IVR (FreeSWITCH/Asterisk) with ASR/NLU services and answering-machine detection, deployed via Docker and ECR on AWS. Containerised inference agents on GPU servers using Docker Swarm and CI/CD, and built Python SDKs bridging ML models into production.

Freelance

Team Lead / Senior Backend Engineer

Freelance

Oct 2020 - Aug 2024 • 3 yrs 10 mos

Backend and full-stack engagements for international clients across e-commerce, marketing and web3. For a UK client I led the development team across three proprietary production applications, architected them on AWS (EC2, Amplify, Cognito, VPC, SES), and ran requirement-gathering sessions directly with the client. For an Australian client I built the delivery backend of a messaging platform on AWS SES, S3, EC2 and Lambda, with cron-based scheduling and Gunicorn for reliable throughput, behind Node.js APIs and a Next.js frontend.