Platform engineering in modernisation strategies

Derek Ashmore at Asperitas shares five reasons that platform engineering is the missing link in continuous application modernisation

 

In 2025, modernisation efforts remain central to digital transformation, and platform engineering has emerged as a critical, yet often overlooked, linchpin in that journey. Traditional modernisation strategies often stall; what should have been cloud-native apps re-emerge as lifted-and-shifted monoliths.

 

The missing ingredient? A platform engineering approach that supports development, security, operations, and compliance in a unified fashion.

 

 

Five benefits of platform engineering

Here are five compelling reasons platform engineering is indispensable for continuous modernisation.

 

1. Abstracts infrastructure complexity

Legacy systems reside across on-premises, cloud, and hybrid environments. Developers often lack the specialised skills to navigate each infrastructure. Platform engineering solves this by building an internal developer platform (IDP). These platforms provide developers with a simple, consistent interface to provision and deploy services regardless of underlying complexity.

 

This abstraction dramatically reduces developer friction. They no longer need deep infrastructure knowledge or access to specialised ops teams. Instead, they use the platform much like a user-friendly portal. Internal platforms enable self-service access to key resources and tooling. With one interface, developers can deploy and monitor applications across environments, bridging legacy and cloud, without disrupting workflows.

 

2. Enforces standardisation and governance

One-off modernisation efforts frequently lead to fragmented and fragile architectures. Internal developer platforms correct this by embedding governance policies like security, compliance, operational checks into self-service workflows. Platform engineering enforces consistent security models and policy-as-code across deployment environments. This ensures that modernisation efforts preserve compliance and reliability.

 

Standardised platforms put guardrails in place so developers can innovate without introducing drift, configuration sprawl, or undocumented exceptions. The outcome is modernisation that scales and endures rather than devolving into chaos.

 

3. Enables incremental decomposition of monoliths

Big bang modernisation efforts introduce high risk and long release cycles. Instead, platform engineering supports an API-first, microservices approach in gradual transitions. Teams can wrap legacy functions with thin APIs, extract critical services behind the scenes, and shift traffic incrementally.

 

Observability and deployment tooling live within the platform, enabling DevOps practices on legacy components. Internal platforms enable continuous modernisation while maintaining uptime and minimising disruption. They allow organisations to modernise in measurable steps, improving confidence and reducing risk.

 

4. Embeds CI/CD and observability by default

Legacy modernisation often stalls on manual release processes and visibility gaps. Platform engineering solves this by baking continuous integration, delivery, and observability directly into developer workflows. IDPs come preconfigured with telemetry, logging, tracing, rollbacks, and deployment strategies such as canaries or blue-green updates. This enables teams to track performance, detect regressions, and deliver updates safely even for legacy-derived workloads.

 

Platform engineering ensures automation and monitoring come standard, empowering development teams to modernise at velocity without sacrificing reliability. Continuous feedback closes the loop between change and insight.

 

5. Unifies dev, sec, reliability, and operations

Platform engineering is not siloed. It functions at the intersection of developer tooling, site reliability, and security. Platform teams act as connective tissue between developers, SRE and security functions, making collaboration intrinsic rather than ad hoc. The platform becomes a product that incorporates security and reliability standards into standardised developer experiences.

 

This united view transforms modernisation from a fragmented wave into a strategic, ongoing capability.

 

 

Why doing nothing is risky

Without platform engineering, modernisation becomes reactive and brittle. Projects revert to manual pipelines, point-tool orchestration, and fragile scripts. Risks multiply: slow time to deploy, inconsistent configurations leading to drift or security holes, and low visibility into system behaviour. Modernisation efforts stall, and cloud migrations become dusty lift-and-shift projects with little long-term payoff.

 

By contrast, platform engineering injects automation, governance, and collaboration, creating a modern environment in which modernisation happens continuously and sustainably.

 

 

Implementing platform engineering thoughtfully

To succeed, organisations must build thoughtfully. They should start by providing consistent developer interfaces across hybrid environments. This simplifies provisioning and deployment from day one.

 

Governance must be embedded into the platform using policy as code, least privilege access, and compliance checks. Monoliths should be modernised incrementally, wrapping them behind APIs and shifting functionality piece by piece. CI/CD and observability tools should come standard to support safe delivery.

 

Platform teams should include representatives from SRE, security, and business stakeholders to ensure cross-functional oversight. Finally, the platform must be treated as a product, with feedback loops and usability metrics guiding continuous improvement.

 

 

Measuring success

Organisations evaluating the impact of platform engineering on modernisation should monitor a balanced mix of quantitative and qualitative indicators. These include how quickly developers can deploy new services, how frequently deployments occur, and how often changes lead to failures or require rollbacks. Uptime metrics and mean time to recovery can reveal how well the platform supports reliability, while telemetry usage indicates maturity in observability.

 

Teams should also assess how much of their legacy footprint has been moved to containerised or serverless environments and how many APIs or microservices have been refactored. Cost efficiency, such as the gap between resource allocation and utilisation, is another meaningful metric.

 

Collectively, these data points provide a clear picture of whether platform engineering is improving agility, stability, and business alignment.

 

Platform engineering is the crucial missing link in continuous modernisation. By abstracting complexity, enforcing governance, enabling microservice decomposition, and uniting teams around shared infrastructure, it turns modernisation into an ongoing capability.

 

Platform engineering acts as both enabler and regulator, bringing cloud-native standards into existing systems and ensuring compliance is practical and scalable.

 

Enterprises that invest in platform engineering elevate modernisation from a one-time project into a core capability. They will release faster, operate safer, and adapt more readily to changing demands. Organisations that do not will fall behind, losing agility, security, and developer confidence.

 

Platform engineering is no longer optional. It is mandatory for businesses that want to modernise legacy systems and compete in a digital-first world.

 

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As AI Enablement Principal at Asperitas, Derek Ashmore helps organisations unlock value from AWS and Azure, cutting costs, improving security, and achieving greater performance and availability

 

Main image courtesy of iStockPhoto.com and tadamichi