
Md Nazim Uddin
Verified Expert in Engineering
Contact Center Architect and Developer
Melbourne, Victoria, Australia
Toptal member since January 26, 2023
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
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
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.
Contact Center | Systems Assistant Manager
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.
Experience
AI Voice Booking Bot - Cisco Webex CC
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
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 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 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
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
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/c4567b36e9dc4c969dd930ac34e79328Education
Bachelor's Degree in Computer Engineering
American International University - Bangladesh (AIUB) - Dhaka, Bangladesh
Certifications
AWS Certified Solutions Architect - Associate
AWS
IELTS
British Council
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
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