AI-Powered Engineering in Australia: What It Takes to Modernize Legacy Platforms at Speed

Across Australia, modernization is no longer a side initiative. For CIOs, CTOs and digital leaders, it has become a business imperative. Retailers need more flexible commerce platforms. Financial institutions need to modernize core systems while improving customer centricity and operational resilience. Government agencies need to deliver better digital services for citizens while streamlining complex internal operations. In each case, the challenge is the same: how to move from legacy modernization ambition to execution quickly, without losing sight of business value.

That is where AI-powered engineering can make a meaningful difference. Modernization is not simply a technology upgrade. It is a coordinated shift in platforms, delivery practices, operating models and decision-making. Publicis Sapient helps organizations make that shift by combining product, engineering, data and AI through its SPEED model: Strategy, Product, Experience, Engineering, and Data & AI. The result is a more integrated approach to transformation—one that helps organizations modernize legacy estates with greater speed, quality and clarity of purpose.

Publicis Sapient’s continued investment in Australia, including the appointment of Harshu Deshpande as Product and Engineering Lead for Australia, reflects that commitment. His remit is not just about building teams. It is about strengthening local engineering leadership to help clients accelerate legacy modernization, scale AI implementations and deliver end-to-end business transformation through multidisciplinary delivery.

Many Australian enterprises understand what needs to change. They want more resilient platforms, faster release cycles, better use of data, lower operational friction and more adaptable customer experiences. Yet many programs stall because they treat modernization as a technical migration rather than a business transformation effort.

Legacy platforms often sit at the center of critical revenue, service and operational processes. Replacing or reshaping them requires more than code changes. It requires clear prioritization, a product mindset, human-centered experience design, modern engineering methods and a strong data and AI foundation. Without that integration, organizations risk delivering modern architecture without modern ways of working—or speed without measurable value.

This is why Publicis Sapient’s SPEED model matters. It brings together strategy to define the value agenda, product to focus teams on outcomes, experience to ensure relevance and usability, engineering to build scalable platforms, and data & AI to unlock insight, automation and new business models. For modernization leaders, that integrated model helps connect every platform decision back to growth, efficiency and customer or citizen impact.

AI is fundamentally reshaping engineering and the value organizations expect from it. Used well, AI-enhanced engineering can help teams move faster across the software delivery lifecycle, improve decision-making and reduce friction in modernization programs. But AI is most powerful when it is embedded into a disciplined engineering approach rather than treated as a standalone experiment.

Publicis Sapient combines engineering expertise with AI platforms and delivery capabilities to help clients achieve faster, more effective results. That means using AI to support modernization in practical ways: accelerating development, improving automation, enhancing operational efficiency and helping teams manage complexity across large-scale transformation programs. The goal is not modernization for its own sake. It is modernization that creates measurable value sooner.

That approach is strengthened in Australia by the combination of engineering, delivery, data and AI leadership. Alongside Harshu Deshpande’s role, Gavin Seewooruttun’s appointment as Data and AI Lead for Australia reinforces Publicis Sapient’s ability to integrate modern engineering with advanced analytics and AI-driven automation. Together, these capabilities help organizations move beyond isolated modernization efforts toward connected, next-generation solutions.

For organizations modernizing legacy platforms at speed, a few capabilities consistently make the difference between incremental change and real transformation.

Cloud-native delivery is one of them. Cloud is not only an infrastructure decision; it is an enabler of faster delivery, greater resilience and more scalable innovation. Publicis Sapient helps organizations bring applications to market faster through the cloud while reducing risk with consistent, secure and reliable deployments through automation and self-service. In practice, that helps modernization programs avoid simply lifting legacy complexity into new environments.

Microservices and APIs are equally important for enterprises seeking flexibility. Publicis Sapient engineers and operates microservices and API platforms that improve collaboration and agility within teams, making it easier to innovate without being constrained by monolithic architectures. For large Australian organizations, this can create a more composable foundation for change, enabling new services, integrations and customer experiences to be launched without reworking the entire estate.

Site reliability engineering helps ensure that speed does not come at the expense of stability. Modernization programs often fail when new platforms introduce operational complexity or governance gaps. Publicis Sapient improves connectivity across engineering, operations and governance teams and applies automation and machine learning to help systems remain reliable, efficient and cost-effective. This is especially critical for sectors such as financial services and government, where trust, uptime and service quality are non-negotiable.

Agile ways of working remain essential. Modern platforms need modern delivery models. Publicis Sapient helps clients shift not only technology but also the methods, processes, tools and team structures required for continuous improvement and value creation. Agile engineering, enterprise startup models and cross-functional teams allow organizations to move with more speed and quality while staying aligned to customer and business needs.

In retail, modernization is often tied to commerce platform innovation, omnichannel expectations and the need for scalable, flexible digital products. Publicis Sapient supports retailers including Endeavour Group and Wesfarmers, helping navigate platform transformation through composable architectures and MACH principles—microservices, API-first, cloud-native and headless. This creates a foundation for faster innovation, better customer experiences and stronger long-term adaptability.

In financial services, the pressure is to modernize operations while improving customer centricity and unlocking new growth opportunities. Publicis Sapient’s experience in banking combines modern engineering, AI and data-driven approaches to help institutions enhance services, transform operations and deliver more personalized digital experiences.

In government, modernization must balance service quality, operational efficiency and public trust. Publicis Sapient works with federal and state governments across portfolios including justice, education, customer service and human services. By infusing data and AI into public sector engagements and pairing that with modern engineering practices, agencies can reimagine citizen experiences while improving responsiveness and resilience.

The most successful legacy modernization programs do not start with a platform blueprint alone. They start with a value thesis: what the organization is trying to unlock, how that value will be measured, and which capabilities are needed to deliver it. That is why Publicis Sapient’s approach is advisory-led as well as engineering-led. Modernization is framed not just as a technology shift, but as a way to reimagine business models, operational processes and customer or citizen experiences.

For Australian enterprises, the path forward is clear. Legacy modernization at speed requires more than new tools. It requires integrated leadership across strategy, product, engineering, experience, data and AI. It requires cloud-native platforms, microservices and APIs, reliable operations and agile ways of working. And increasingly, it requires AI-enhanced engineering to accelerate delivery without losing control of quality, resilience or business focus.

Publicis Sapient is investing in exactly those capabilities in Australia. With multidisciplinary teams across Sydney, Melbourne and Canberra, and with strengthened local leadership in engineering and data & AI, the organization is helping clients move from modernization ambition to execution—faster, smarter and with business value at the center.

Relevant Links

• Publicis Sapient Announces Harshu Deshpande as Product and Engineering Lead for Australia
• Engineering Transformation in Australian Retail: Composable Commerce, Personalization and AI at Scale
• Why Australia Is Emerging as an APAC Hub for AI-Driven Product Engineering
• L’excellence de l’ingénierie numérique en France : moderniser les plateformes, accélérer l’IA et créer de la valeur durable (Europe)
• Excelencia en ingeniería digital en México: cómo construir productos preparados para el futuro en una economía de alta complejidad (LATAM)
• Publicis Sapient Announces Harshu Deshpande as Product and Engineering Lead for Australia
• Reimagining Citizen Services in Australia: How AI, Product Thinking and Engineering Excellence Improve Service Delivery