Md Nazim Uddin, Developer in Melbourne, Victoria, Australia
Md is available for hire
Hire Md

Md Nazim Uddin

Contact Center Architect and Developer

Melbourne, Victoria, Australia

Toptal member since January 26, 2023

Bio

Nazim is a contact center architect and solutions consultant with 20 years of experience delivering CCaaS, UCaaS, and AI voice solutions across ANZ and Asia Pacific. He specializes in Cisco Webex CC, Amazon Connect, Genesys, Avaya, Vapi, and Retell AI, and builds automation workflows using N8N, Python, and AWS serverless. Nazim holds Cisco Webex CC Expert, AWS CSA, and Amazon Connect certifications and has completed 75+ freelance projects globally.

Portfolio

Scicom
Avaya Software, Genesys, Amazon Connect, Twilio, Solution Design...
VEON
Avaya Software, Avaya OD, Avaya Proactive Outreach Manager (POM), Avaya AES...

Experience

  • Call Centers - 14 years
  • Solution Architecture - 10 years
  • Genesys - 10 years
  • Solution Design - 10 years
  • Twilio - 3 years
  • Python - 3 years
  • Amazon Connect - 3 years

Preferred Environment

Amazon Connect, Twilio, Genesys, Contact Centers, Avaya Software, AI Agents, Cisco WebexCC, VAPI, Retell AI, n8n

The most amazing...

...project I've done was co-founding ZISA Labs, an AI contact center platform for SMEs in Australia and the US, built on years of enterprise CCaaS expertise.

Work Experience

Senior Solutions Architect

2016 - 2023
Scicom
  • Developed the architecture and design of the contact center solution and voice infrastructure for several clients using multi-product and multi-tenant strategies to host different clients.
  • Managed contact center and voice-related inbound and outbound projects as a technical PM, an implementation lead, and a technical consultant.
  • Provided L2 and above support concerning day-to-day issues.
  • Used technologies such as Avaya Call Center Elite, Avaya Proactive Outreach Manager, Avaya AES, CMS, AAEP, and MPP, Avaya Application Server, Avaya Interaction Center, call flow design, Genesys PureEngage, and Verint WFO.
Technologies: Avaya Software, Genesys, Amazon Connect, Twilio, Solution Design, Session Border Controller (SBC), Avaya Call Management System (CMS), Avaya OD, Interactive Voice Response (IVR), Avaya Proactive Outreach Manager (POM), Verint, JSON, Node.js, Omnichannel Marketing, Avaya AES, Apache Tomcat, Microsoft SQL Server, PostgreSQL, Avaya Communication Manager, Avaya MPP, Avaya Proactive Contact

Contact Center | Systems Assistant Manager

2010 - 2016
VEON
  • Designed and implemented the contact center voice application, ensuring operational continuity of the Avaya contact center and a unified communications platform.
  • Handled operations, maintenance, and level 2 support for the contact center, unified communications platform, and video conferencing system.
  • Implemented new business CR and periodic enhancements on the related contact center, unified communications platform, and video conferencing system.
Technologies: Avaya Software, Avaya OD, Avaya Proactive Outreach Manager (POM), Avaya AES, Avaya Communication Manager, Unified Communications, Call Centers, Cisco, Video Conferencing

Experience

AI Voice Booking Bot - Cisco Webex CC

As the solution architect and lead developer for the AI Voice Booking Bot project on Cisco Webex CC, I designed and deployed an autonomous AI voice booking agent across seven enterprise sites, replacing manual scheduling processes.

I built the system on Cisco Webex CC AI Agent Studio with a dynamic JSON-driven multi-site configuration model, enabling per-site calendar routing via Webex Connect. Additionally, I integrated the bot with both Microsoft Bookings and Google Calendar to support mixed enterprise environments.

Throughout the engagement, I resolved key architectural challenges around AI agent session management and looping behavior within the Flow designer. This involved shifting to an autonomous AI agent model for production stability.

Custom Outbound Dialer for Amazon Connect

In the project involving the development of a custom outbound dialer for Amazon Connect, I addressed gaps in the platform's native outbound capability by creating a fully custom solution.

I built calling list upload functionality, simultaneous and concurrent dial control, and a suite of REST API endpoints covering campaign creation, management, and full lifecycle operations, including status monitoring, start, stop, and pause.

For the back-end logic, I utilized Python and AWS Lambda with DynamoDB for campaign state management. This setup allowed the client to have complete programmatic control over outbound campaigns via API.

AI Outbound Calling System - Home Services

I architected and delivered a comprehensive AI outbound calling system for a home services company, automating outbound customer engagement from start to finish.

I built four N8N automation workflows that orchestrated call triggering, lead list management, data handling, and result logging back to Google Sheets. The integration included Vapi for AI voice, Twilio for telephony infrastructure, and Google Sheets as the operational data layer for lead tracking and call outcomes.

Furthermore, I configured AI voice agent prompts and conversation flows tailored for outbound customer follow-up in the home services industry. I also created full project documentation, including a system architecture diagram and a client handover pack, enabling the client to manage and extend the system independently post-delivery.

ZISA Labs - AI Contact Centre Platform for SMEs

https://www.zisalabs.com/
I co-founded and led the architecture of ZISA Labs, an AI-powered contact center platform tailored for small and medium enterprises in Australia and the US. The platform aimed to provide enterprise-grade CCaaS and AI voice capabilities at accessible scale and price points for SMEs.

I designed the platform to encompass CCaaS integration, AI voice agent configuration, and N8N-based automation workflows. My responsibilities included defining the technical strategy, platform design, and overseeing early-stage delivery. This involved combining extensive enterprise contact center expertise with modern AI voice and automation tooling to bridge the gap for SMEs.

Avaya Aura Contact Centre Deployment

As the implementation lead, I spearheaded a comprehensive Avaya Aura contact center deployment for various enterprise clients in the banking and eCommerce sectors. This involved overseeing end-to-end delivery, including system design, installation, and configuration of Communication Manager, Application Enablement Services, and Avaya Outbound Dialer.

I managed the integration with Apache Tomcat-based middleware components and facilitated coordination across vendor, infrastructure, and business stakeholder teams throughout the project lifecycle. My responsibilities included ensuring technical delivery quality, resolving issues, and providing go-live sign-off across all deployment phases.

Amazon Connect & Twilio - 60+ Contact Center Builds

I successfully delivered over 60 cloud contact center projects across various industries, ranging from small businesses to large enterprises, through an online freelance agency. These projects involved implementations using Amazon Connect and Twilio for clients in the telecommunications, insurance, retail, and professional services sectors.

In Amazon Connect projects, I handled IVR and contact flow design, agent and queue configuration, Lambda integrations, CRM connectivity, outbound dialing, and AWS service integrations utilizing Lex, DynamoDB, S3, Kinesis, CloudWatch, and Transcribe. For Twilio projects, I managed Twilio Flex contact center builds, Twilio Studio flow design, media streaming, real-time transcription, and Twilio Voice API integrations.

Consistently maintaining a top-rated status, I engaged in repeat client projects, delivering production-ready solutions independently from requirements through to go-live.

Omnichannel Lead Generation Solution using Twilio

https://www.loom.com/share/c4567b36e9dc4c969dd930ac34e79328
In this system, when a customer responds to a web form, the data is immediately ingested into a CRM. Twilio then sends an SMS and initiates an outbound call to the customer's number. If the customer agrees, Twilio sends another SMS with a meeting booking URL and also dispatches an email to the customer's email address.

Education

2002 - 2007

Bachelor's Degree in Computer Engineering

American International University - Bangladesh (AIUB) - Dhaka, Bangladesh

Certifications

JULY 2021 - PRESENT

AWS Certified Solutions Architect - Associate

AWS

FEBRUARY 2020 - PRESENT

IELTS

British Council

NOVEMBER 2010 - PRESENT

AVA0836H00 - Avaya Aura Communication Manager Administration

Avaya University

Skills

Libraries/APIs

Node.js, Twilio API, REST APIs

Tools

Amazon Connect, Avaya OD, Avaya AES, Apache Tomcat, AWS CloudFormation, Amazon Cognito, Retell AI, n8n, Google Sheets, Amazon Lex

Platforms

Twilio, Amazon Web Services (AWS), Genesys Voice Platform (GVP), Linux, AWS Lambda

Languages

Python, JavaScript

Storage

JSON, Microsoft SQL Server, PostgreSQL, Amazon S3 (AWS S3), Amazon DynamoDB

Other

Communication, Genesys, Solution Design, Programming, Solution Architecture, Avaya Software, Outbound Marketing, Call Centers, Contact Centers, Unified Communications, Languages, SIP, Recording, APIs, Session Border Controller (SBC), Avaya Call Management System (CMS), Avaya Proactive Outreach Manager (POM), Verint, Omnichannel Marketing, Avaya Communication Manager, Avaya MPP, User Requirements, Cisco UCS, Servers, IT Project Management, Avaya Proactive Contact, H.323, Amazon Kinesis, Interactive Voice Response (IVR), Avaya Interaction Center, SMS, Email, Voice, Middleware, Content Management Systems (CMS), Cisco, MCU, Videos, Streaming, VCS, Video Conferencing, Speech Recognition, Google, AI Agents, Cisco WebexCC, VAPI, Cisco Webex CC, AI Agent Studio, Webex Connect, Microsoft Bookings, Google Calendar, Conversational AI, Outbound Dialling, Vapi, AI Voice Agents, Workflow Automation, Prompt Engineering, Architecture, Product Strategy, Avaya Outbound Dialer, Session Initiation Protocol (SIP), Contact Centre Architecture, Twilio Flex, Twilio Studio, Twilio Voice API, CRM, Lead Generation

Collaboration That Works

How to Work with Toptal

Toptal matches you directly with global industry experts from our network in hours—not weeks or months.

1

Share your needs

Discuss your requirements and refine your scope in a call with a Toptal domain expert.
2

Choose your talent

Get a short list of expertly matched talent within 24 hours to review, interview, and choose from.
3

Start your risk-free talent trial

Work with your chosen talent on a trial basis for up to two weeks. Pay only if you decide to hire them.

Top talent is in high demand.

Start hiring