Enterprise Data & AI Leader

Sayan Chatterjee

I turn 20+ years of enterprise architecture experience into AI and data platforms that actually ship — helping regulated organisations adopt GenAI, agentic AI and modern lakehouse platforms safely, with the governance and executive buy-in to make it stick.

  • $9MSavings delivered via modernisation
  • 20+Years in enterprise tech
  • 100+Legacy systems modernised
Portrait of Sayan Chatterjee
Open to Advisory & Architecture roles

Why hire me

What you get when I join your team.

01

A board-ready AI & data strategy

A target-state architecture, governance model and platform roadmap your executives will approve — and your engineers can actually build against.

02

GenAI & agentic platforms that ship

Working GenAI patterns, agentic AI architecture, self-service ML platforms and AI-ready lakehouses — not proofs of concept that stall after the demo.

03

Governance that accelerates delivery

Guardrails, RACI models and review boards that satisfy regulators and risk teams while letting engineering move faster, not slower.

04

Executive trust and delivery follow-through

Someone who secures funding, builds and leads delivery teams, and stays with a program through to production — not just the strategy deck.

$9MAnnual savings via Application Modernisation programs
$250K+Saved annually via archival platform redesign
100+Legacy systems modernised across ANZ Bank
24Member delivery team led across onsite & offshore
40%Design effort cut via Migration-as-a-Service model
20+Years driving enterprise architecture outcomes

Selected work

What I've built, not just designed.

Enterprise AI Strategy

Enterprise AI & Lakehouse Strategy

Australian Unity · 2025–Present

Authored the enterprise AI/data strategy, semantic model and ontology foundations guiding a multi-year AI-ready platform investment; shipped GitHub Copilot review guardrails and a Data Modeller AI agent as reusable engineering capabilities.

GenAI Research

GenAI Engineering-Productivity Study

ANZ Bank · 2021–2024

Led one of the first Generative AI productivity experiments among Australia's big-four banks, evaluating GitHub Copilot at enterprise scale. Published research acknowledged by the ANZ CTO and picked up by media.

Data Platform

Enterprise GCP Data Mesh

ANZ Bank · 2021–2024

Owned design and build of ANZ's Data Mesh, including the Data Product Catalogue and Data Mesh Control Plane — establishing federated ownership and self-serve analytics across engineering domains.

Cost Optimisation

Enterprise Archival Platform

Australian Unity · 2025

Led the RFP and vendor evaluation that selected OpenText Information Archive, then designed an AWS-based archival architecture and reusable ETL framework — saving $250K+ every year.

Award-winning

Internet Banking Modernisation

Wipro Limited · Client: ANZ Bank

Led solution design on a multi-million-dollar Internet Banking (AU) modernisation program impacting every ANZ customer — recognised internally for outstanding design leadership.

Legacy Modernisation

Application Modernization Program

Wipro Limited · Client: ANZ Bank

Led 11 senior architects modernising 100+ legacy systems and created a Migration-as-a-Service model that cut design effort by 40%, while chairing design governance forums.

Expertise

Where I create the most value.

Enterprise AI Strategy & Architecture

Data & AI strategy, reference architectures, architecture principles and standards, guardrails, patterns, and enterprise architecture governance.

AI, GenAI & Agentic Platforms

Machine learning platforms, Generative AI, agentic AI architecture, LLM-enabled engineering, intelligent automation, responsible AI controls and governance patterns.

AI-Ready Data Foundations

Lakehouse & medallion architectures, data mesh, semantic layers, ontology, knowledge graphs, metadata intelligence, lineage, data quality, privacy-by-design.

Enterprise Investment & Governance

AI portfolio visibility, technology rationalisation, architecture review boards, business cases, value realisation, RFP leadership and vendor evaluation.

Cloud, Security & Delivery

AWS, GCP, Azure, multi-cloud data architecture, secure cloud patterns, IAM, encryption, streaming & batch integration, CI/CD, regulatory-aligned controls.

Leadership & Executive Influence

Architecture leadership, team leadership, stakeholder influence, governance forums, capability uplift and senior technology advisory.

Experience

Two decades of enterprise architecture leadership.

  1. Aug 2025 – Present

    Domain Architect – Data

    Australian Unity — Data Analytics & AI

    Enterprise AI & data strategy, lakehouse architecture, GenAI/agentic patterns, Salesforce Data 360 direction.

  2. Aug 2024 – Aug 2025

    Data Architect

    Tech M

    Client: Australian Unity

    Built and led a 24-member Data & Analytics delivery team across onsite and offshore; drove enterprise GitHub Copilot rollout.

  3. Aug 2021 – Feb 2024

    Cloud Data Architect

    ANZ Bank

    GenAI productivity research, GCP Data Mesh ownership, self-service ML platform design for enterprise analytics and AI workloads.

  4. Jan 2020 – Aug 2021

    Lead Cloud Architect

    Wipro Limited

    Client: ANZ Bank

    Cloud hosting & migration architecture across AWS/GCP for payments, card tokenisation and ATM platforms; APRA/PCI-DSS compliance.

  5. Jan 2019 – Jan 2020

    Senior Solution Architect

    Wipro Limited

    Client: ANZ Bank

    Established an Asset Lifecycle Management operating framework, delivering $9M in annual savings.

  6. Jun 2014 – Jan 2019

    Lead Program Architect

    Wipro Limited

    Client: ANZ Bank

    Led 11 architects modernising 100+ legacy systems; created a Migration-as-a-Service model cutting design effort by 40%.

  7. Nov 2011 – May 2014

    Solution Designer / Project Lead

    Cognizant Technology Solutions

    Client: University of Cambridge

    Led a 12-member team delivering a greenfield Transport & Messaging system — one of the client's first fully agile programs.

  8. Sep 2005 – Nov 2011

    Technology Lead

    PwC

    Built SMART, PwC's global reporting tool, and grew the team behind it from 2 to 12 engineers.

Recognition

Publications, certifications & awards.

Publications & Research

  • The Impact of AI Tools on Engineering at ANZ Bank ↗ Research on AI tools & LLMs in software engineering — referenced by the ANZ Bank CTO.
  • ML Recommender System — Vollie Pty Ltd Matching volunteers to charity jobs using collaborative & content-based filtering.
  • Hindi Character Recognition System Unsupervised classification of handwritten characters — Indian Statistical Institute, Kolkata.

Certifications

  • TOGAF 9 Certified
  • AWS Certified Cloud Practitioner
  • Microsoft Certified Solutions AssociateCloud Platform
  • Architecting & Developing Microsoft Azure SolutionsMCP 534 / MCP 532

Awards

  • Design Leadership AwardInternet Banking (AU) Modernisation, ANZ Bank
  • Wipro Banking APAC AHM AwardExcellence, 2017
  • Wipro Instant Karma AwardOutstanding performance, 2016 & 2014

About

The person behind the architecture.

I'm an Enterprise Data & AI Leader based in Melbourne, Australia. Over 20+ years I've moved from hands-on software engineering to shaping enterprise technology strategy — always staying close enough to delivery that my strategies survive contact with real engineering teams, real regulators, and real budgets.

I care about architecture that ships: platforms that get adopted, governance that speeds teams up instead of slowing them down, and AI investment that's aligned to outcomes an executive can defend to their board. That's what I bring to every organisation I work with.

Education

Master, Data Science — University of Melbourne (2021)

B.Eng, Information Technology — IIEST, Shibpur (2005)

Based in

Melbourne, Australia

Australian Citizen — available for local & remote engagements

Beyond the work

Life outside the architecture diagrams.

Contact

Have a data or AI problem worth solving?

Whether it's enterprise AI strategy, a lakehouse rebuild, agentic AI adoption, or an architecture review your organisation needs — I'd like to hear about it.

This opens your email client with the message pre-filled, addressed to chatterjee.sayan@gmail.com.