Legacy System Modernisation

Custom Software modernisation & Legacy System Re-Engineering

Bring New Life to Legacy Systems with Custom Modernisation

Outdated software slows down your business, increases cybersecurity risks, and limits integration with modern platforms. Outdated systems are a core issue that can hinder operational efficiency and reduce your company's competitiveness. At Promwad, we offer bespoke software development and legacy system reengineering to help tech-driven companies future-proof their operations and applications. Our software modernisation services provide a strategic approach to transforming legacy systems into modern, scalable, and secure solutions.

What Is Legacy System Modernisation?

Legacy modernisation is the process of upgrading old software systems to match current business and technical requirements. Application modernisation is a comprehensive approach that involves consulting, strategic planning, and technical implementation to upgrade legacy systems, tailoring solutions to specific business needs. This includes:

Rewriting or refactoring code
Migrating from monolith to microservices or containers
Upgrading platforms (e.g., Linux kernel, OS, frameworks)
Integrating with modern cloud, web, or mobile interfaces
Enhancing security, traceability, and test coverage
Evaluating and updating the technology stack and tech stack to ensure compatibility and scalability
Leveraging advanced technologies and modern technology to enhance system performance and future readiness
Implementing data modernisation and data modernisation services to improve data quality and enable real-time insights

As a software development agency, we focus on embedded systems, industrial platforms, and business-critical applications. Our goal is to preserve your system’s core functionality while transforming it into a modern, scalable solution. Software modernisation solutions and software product modernisation help organisations stay competitive by enhancing performance, security, and agility. modernising software products and any software product is essential for maintaining their relevance and value in evolving markets. Defining the scope and ROI of a software project, custom software project, or software development project is a critical part of the development process to ensure successful outcomes and measurable business value.

Benefits of Custom Software

Custom software development empowers businesses to address their unique challenges and objectives with precision. Unlike off-the-shelf solutions, creating custom software ensures that every feature and workflow is tailored to your specific requirements, resulting in improved efficiency and streamlined operations. By integrating custom software solutions with your existing systems, you enable seamless data exchange and foster better collaboration across departments.

Leveraging modern technologies such as machine learning, custom software can automate manual processes, enhance customer satisfaction, and support business growth. Ultimately, investing in custom software development gives your organisation a competitive edge, allowing you to adapt quickly to market changes and deliver innovative software solutions that drive long-term success.

Our Core Services

Effective project management and a structured development process are critical for successful modernisation. Well-coordinated development teams, guided by proven methodologies, ensure smooth delivery and risk mitigation. Choosing a reliable software provider is key to long-term project success and ongoing support.

Re-Engineering of Embedded and Industrial Systems

Refactoring firmware (C/C++, FreeRTOS, Zephyr)
Migrating to modern MCUs and SoCs
Adopting cutting edge technologies to future-proof infrastructure
Secure boot, OTA, and telemetry integration
Protocol stack modernisation (CAN, Modbus, Ethernet/IP)

Custom Business Software Development

Rebuilding desktop or web-based legacy software
UI/UX upgrades and backend modernisation
API enablement and cross-platform portability
Enabling communication and data sharing between different software systems
Migration from proprietary frameworks to open technologies (e.g., .NET to Qt/Linux)

Architecture and DevOps Overhaul

Monolith to microservices transformation
Docker, Kubernetes, CI/CD pipelines
Source control, testing automation, rollback strategies
Cloud migration strategy: AWS, Azure, GCP, private cloud
Integrating development and operations teams through DevOps practices improves collaboration and deployment speed

Full Migration Support

Hardware/software compatibility validation
Database and protocol migration
Downtime minimisation and phased deployment
Quality assurance is essential to ensure successful migration
Device driver rewrites and interface testing

Data Management and Security

A successful software modernisation project must prioritise robust data management and security. Legacy software systems often lack the advanced security features needed to protect sensitive data. Modernising software systems involves implementing robust security measures—such as encryption, multi-factor authentication, and secure coding practices—to safeguard your business operations and customer information.

Advanced Analytics and Insights

Modern software systems are increasingly defined by their ability to deliver advanced analytics and actionable insights. By incorporating machine learning and predictive analytics into your custom software development projects, you gain real-time visibility into key business metrics, customer behaviors, and market trends. These advanced analytics capabilities empower your team to make data-driven decisions, optimise operations, and identify new opportunities for growth.

Integration Capabilities

Integration capabilities are a cornerstone of effective software modernisation, enabling your business to connect modernised software systems with a wide range of applications and data sources.

Support and Maintenance

The journey of software modernisation does not end at deployment—ongoing support and maintenance are vital to ensuring your custom software continues to deliver value.

Common Legacy Challenges We Solve

Unsupported tech stack

No mobile/web access

Security risks and outdated APIs

Hard-coded logic and lack of logs

Poor performance on new hardware

No source code documentation

Obsolete hardware dependencies

How We Work: Modernisation in 6 Steps

We use a phased approach to minimise disruption to your operations. Whether you're targeting real-time embedded platforms, multi-tenant web apps, or edge-connected devices, our process is tailored for your environment.

1. Audit & Discovery

Evaluate current system, risks, and goals, and analyse existing business processes to identify areas for improvement

2. Feasibility Study

Define technical roadmap and cost/time estimate

3. Architecture Redesign

Define new structure with scalability in mind

4. Rewriting/Refactoring

Incremental code transformation and validation. A well-executed modernisation process leads to higher user satisfaction through improved performance and usability.

5. Migration & Deployment

Move to new platforms with minimum downtime. Modernisation helps reduce maintenance costs over time by simplifying support and improving integration.

6. Support & Scaling

Documentation, training, and continuous updates. Ongoing maintenance is essential to ensure long-term software reliability and compatibility with evolving technologies.

Why Promwad

As a trusted partner for custom software development outsourcing, we bring:

20+ years of experience in embedded and system software
Full-cycle services: audit, redesign, implementation, QA, and support
Scalable teams with secure collaboration models
Proven success in regulated and mission-critical domains
Proven track record in delivering successful modernisation projects across various industries
Cross-functional engineering teams: hardware, firmware, backend, DevOps

We don’t just rewrite your legacy code — we help you strategically modernise it to meet tomorrow’s requirements. With deep expertise in legacy software modernisation and a commitment to effective modernisation efforts, we ensure your systems are updated to current technology standards for long-term success.

Start Modernising with Confidence

Modernising legacy systems doesn’t have to mean starting from scratch. With Promwad’s software development solutions, you can retain valuable business logic, reduce risks, and unlock new capabilities for the future.

Whether you need to extend product lifecycle, improve security, or scale to new platforms, our bespoke software development team is ready to help. Let's work together to design your next generation of reliable, secure, and scalable custom software.

Contact us to start your system upgrade!

Drop us a line about your project! We will contact you today or the next business day. All submitted information will be kept confidential.