GDPR Compliance

We use cookies to ensure you get the best experience on our website. By continuing to use our site, you accept our use of cookies, privacy policy and terms of service.

MuleSoft Migration & Modernisation Specialists

MuleSoft Migration & Modernisation
Upgrade Legacy Integrations to MuleSoft

We migrate legacy integration platforms to MuleSoft and modernise existing Mule applications — covering Mule 3 to Mule 4 migration, legacy ESB and middleware replacement, on-premise to CloudHub migration, and complete integration estate modernisation with improved architecture, error handling, and governance.

Mule 3 to 4 ESB to MuleSoft CloudHub Migration Code Modernisation
Global
Delivery
4.9★
Client Rating
100+
Projects Delivered
MuleSoft
Certified Team
50+
Migrations Delivered
MuleSoft migration and modernisation engagements across industries.
Zero
Downtime Migrations
All migrations delivered with zero production downtime through parallel operation strategy.
100%
API Coverage
Every migrated integration assessed, documented, and migrated with full test coverage.
Legacy ESB
Replaced
IBM DataPower, Oracle OSB, TIBCO, MicroFocus, and WSO2 migration experience.
60%
Performance Improvement
Average performance improvement from Mule 3 to Mule 4 migration.
4.9★
Client Rating
Consistently rated for migration quality and zero-downtime delivery.
What We Deliver

MuleSoft Migration — Full Service Scope

Every type of MuleSoft migration and modernisation — from Mule 3 to 4 upgrades through legacy ESB replacement and full integration estate modernisation.

Mule 3 to Mule 4 Migration

We migrate existing Mule 3 applications to Mule 4 — rewriting flows using modern Mule 4 patterns, migrating MEL to DataWeave 2.0, replacing deprecated components, and achieving full Mule 4 compatibility with improved error handling.

  • MEL to DataWeave 2.0 migration
  • Deprecated component replacement
  • Error handling refactoring
  • Mule 4 compatibility testing

Legacy ESB to MuleSoft

We replace legacy integration middleware — IBM DataPower, Oracle OSB, TIBCO BusinessWorks, WSO2, MicroFocus — with MuleSoft Anypoint Platform — preserving integration functionality while gaining API-led architecture, modern governance, and cloud deployment.

  • Integration inventory and assessment
  • Functional equivalence design
  • Parallel operation transition
  • Legacy platform decommissioning

On-Premise to CloudHub Migration

We migrate existing on-premise Mule runtimes to CloudHub 2.0 or Runtime Fabric — reconfiguring properties, credentials, connectivity, and monitoring for cloud-native deployment without functional changes.

  • Environment configuration migration
  • CloudHub network and VPC setup
  • Credential and secret migration
  • CI/CD pipeline reconfiguration

Integration Code Modernisation

For existing Mule 4 codebases with technical debt — we refactor non-bulkified flows, improve error handling, add MUnit test coverage, modernise DataWeave transformations, and align to current API design standards.

  • Technical debt assessment
  • Flow refactoring and restructuring
  • MUnit test suite development
  • API design standards alignment

Architecture Modernisation

We redesign existing integration architectures — replacing point-to-point patterns with API-led connectivity, introducing Process API reuse, and restructuring monolithic flows into composable, testable modules.

  • Point-to-point to API-led migration
  • Process API extraction and design
  • Flow decomposition and modularisation
  • Governance framework implementation

Security & Compliance Upgrade

We upgrade security configurations in existing Mule applications — migrating to OAuth 2.0, adding API Manager policies, implementing secrets management, and achieving current security and compliance standards.

  • Security configuration assessment
  • OAuth 2.0 migration
  • API Manager policy implementation
  • Secrets management integration
Migration Types

MuleSoft Migration Types We Deliver

Every type of MuleSoft migration — from version upgrades through legacy ESB replacement and architectural modernisation.

Mule 3 to Mule 4

Full Mule 3 to 4 migration — MEL to DataWeave 2.0, deprecated component replacement, error handling refactoring, and MUnit test suite development.

IBM DataPower to MuleSoft

Replacing IBM DataPower with MuleSoft API Manager and Mule flows — preserving XSLT transformations, WS-Security policies, and routing logic.

Oracle OSB to MuleSoft

Oracle Service Bus to MuleSoft migration — business service, proxy service, and pipeline migration to Mule flows with API-led architecture.

TIBCO to MuleSoft

TIBCO BusinessWorks and EMS to MuleSoft migration — process migration, JMS to Anypoint MQ, and property/config migration.

On-Premise to CloudHub

Mule runtime on-premise to CloudHub 2.0 migration — configuration, credentials, connectivity, and CI/CD pipeline reconfiguration.

WSO2 to MuleSoft

WSO2 ESB and API Manager to MuleSoft migration — synapse mediators to Mule flows and API governance migration.

Security Modernisation

Basic auth and API key to OAuth 2.0 migration, secrets manager integration, and API Manager policy implementation.

Performance Modernisation

Identifying and refactoring performance bottlenecks — N+1 query patterns, synchronous chains, and large payload handling.

How We Work

Our MuleSoft Migration & Modernisation Process

A structured delivery methodology that minimises risk and ensures measurable progress at every stage of your MuleSoft engagement.

01

Integration Estate Assessment

We audit every existing integration — documenting functionality, data flows, error handling, dependencies, and technical debt — producing a complete migration inventory with effort estimates.

02

Migration Strategy & Sequencing

We design the migration strategy — phasing by business criticality, technical dependency, and risk — with a parallel operation approach ensuring zero production downtime throughout.

03

Mule 4 Development & Testing

Integrations rebuilt in Mule 4 in prioritised phases — with full MUnit test coverage, CI/CD pipelines, and functional equivalence testing against the legacy platform in sandbox.

04

Parallel Operation Period

New Mule 4 integrations run in parallel with legacy for a validation period — results compared, discrepancies investigated, and business users confirm equivalence before cutover.

05

Production Cutover

Traffic switched from legacy to new platform — DNS or load balancer change with instant rollback capability. Legacy system kept available for 48 hours post-cutover.

06

Legacy Decommissioning

Legacy platform decommissioned after stability confirmed — licences cancelled, infrastructure released, and full migration documentation produced for your records.

Why Rackwave

Why Businesses Choose Us for MuleSoft Migration & Modernisation

What sets Rackwave apart from generic MuleSoft partners — and why our clients consistently rate us 4.9 stars.

Zero-Downtime Methodology

Parallel operation strategy ensures production is never at risk — legacy and new platforms run simultaneously until business users confirm equivalence.

Functional Equivalence Guarantee

We do not consider a migration complete until automated tests confirm every migrated integration produces identical outputs to the legacy version.

Security & Architecture Improvement

Migration is an opportunity to address accumulated technical debt — we improve error handling, add MUnit coverage, and introduce API-led patterns as part of the migration.

Platform Cost Reduction

Replacing a legacy ESB with MuleSoft on CloudHub typically reduces infrastructure and licence costs while improving observability, scalability, and developer productivity.

Certifications

Our Team Holds Active MuleSoft Certifications

Every consultant and developer holds active MuleSoft certifications — not expired credentials. Certified expertise assigned to every engagement.

MuleSoft Integration Architect Certification

MuleSoft Integration Architect

MuleSoft Platform Architect Certification

MuleSoft Platform Architect

MuleSoft Developer Level 1 Certification

MuleSoft Developer Level 1

MuleSoft Developer Level 2 Certification

MuleSoft Developer Level 2

MuleSoft API Design Associate Certification

MuleSoft API Design Associate

MuleSoft API Associate Certification

MuleSoft API Associate

Salesforce Integration Architect Certification

Salesforce Integration Architect

MuleSoft Catalyst Certification

MuleSoft Catalyst

Industries

At Rackwave Technologies, we deliver tailored IT Consulting Services across a wide range of industries. Our industry-focused approach ensures that every solution aligns with specific operational challenges, compliance requirements, and growth objectives—rather than generic technology implementations.

Automotive & EV

Smart IT solutions for connected and electric mobility.

Explore More

Banking & Finance

Secure, scalable IT systems for modern banking.

Explore More

Healthcare

Secure IT solutions for better patient care and data management.

Explore More

Education

Digital platforms for modern learning experiences.

Explore More

Insurance

Digital platforms for faster, smarter insurance operations.

Explore More

Retail & Ecommerce

Technology that powers seamless online and offline selling.

Explore More

Travel, Transport and Hospitality

IT systems for real-time tracking and efficient operations.

Explore More

Manufacturing

IT solutions enabling smart and automated manufacturing.

Explore More

Ready to Modernise Your MuleSoft Integration Platform?

Talk to a certified MuleSoft expert at Rackwave Technologies — free consultation, no commitment, no sales pressure.

Case Studies

MuleSoft Migrations We Have Delivered

Zero-downtime migrations from legacy ESB platforms and Mule 3 to modern MuleSoft Anypoint Platform — with improved architecture, security, and performance.

Manufacturing MuleSoft Migration
Oracle OSB to MuleSoft Migration

Migrated 45 Oracle Service Bus integrations to MuleSoft Anypoint Platform — redesigned as API-led architecture with System and Process APIs. Zero production downtime via 6-week parallel operation period.

45 Integrations
Migrated
Zero
Downtime
API-Led
Architecture
Financial Services MuleSoft Migration
Mule 3 to Mule 4 Migration

Migrated a 60-application Mule 3 estate to Mule 4 — MEL to DataWeave 2.0, deprecated component replacement, and MUnit test suite from zero to 80% coverage. Performance improved by 55%.

60 Apps
Migrated
55%
Performance Gain
80%
MUnit Coverage
Retail & Ecommerce MuleSoft Migration
On-Premise to CloudHub Migration

Migrated 35 Mule applications from on-premise Mule runtimes to CloudHub 2.0 — including VPC configuration, secrets migration, CI/CD reconfiguration, and monitoring setup. Completed in 8 weeks.

35 Apps
Migrated
8 Weeks
Delivery
Zero
Data Loss
star-1
star-2
Hero image

“Rackwave Technologies has significantly improved our marketing performance while providing reliable cloud services. We’ve been using their solutions for a while now, and the experience has been seamless, scalable, and results-driven.”

David Larry

Founder & CEO

Have a question or feedback? Fill out the form below, and we'll get back to you as soon as possible.

Sending your message…

Client Testimonials

What Our Clients Say

Rated 4.9★ across Clutch, Google, and Trustpilot for MuleSoft delivery quality and client outcomes.

"Rackwave designed our entire MuleSoft API-led architecture from scratch. The consulting engagement was thorough — they understood our systems better than our own team after two weeks of discovery. Implementation followed the design exactly."

Ananya Mehta
Ananya Mehta
Director of Integration, FinTech Group

"We had a broken MuleSoft implementation from a previous partner. Rackwave assessed it, delivered a remediation roadmap in two weeks, and fixed everything in six weeks. Zero integration failures since go-live."

James Kimani
James Kimani
CTO, Healthcare Network

"The MuleSoft integration hub Rackwave built connects eight of our systems in real time. Order data flows from Shopify through to SAP and our 3PL without any manual intervention. It just works."

Sophie Laurent
Sophie Laurent
Head of IT, Retail Brand
FAQ

Frequently Asked Questions

Common questions about MuleSoft Migration & Modernisation — answered directly.

  • Should I migrate from Mule 3 to Mule 4?

    Yes. Mule 3 reached end of extended support and is no longer receiving security patches. Mule 4 provides significant improvements: DataWeave 2.0 for data transformation, improved error handling with Try scopes, better support for streaming and large payloads, reactive execution engine for improved performance, and full CloudHub 2.0 compatibility. The sooner you migrate, the less technical debt accumulates in the Mule 3 codebase.

  • How long does a Mule 3 to Mule 4 migration take?

    A small estate of 10 to 15 Mule 3 applications typically takes 6 to 8 weeks. A medium estate of 30 to 50 applications takes 12 to 16 weeks. A large estate of 60+ applications takes 20 to 30 weeks in phased delivery. Timeline depends on code quality — well-structured Mule 3 code migrates faster than complex, undocumented MEL-heavy flows. We conduct a migration assessment to provide an accurate timeline estimate.

  • What is the risk of a zero-downtime migration?

    Zero-downtime migration risk is managed through parallel operation — we run the new MuleSoft platform in parallel with the legacy system, with both processing the same transactions (or with a traffic split), and compare outputs before cutting over. The rollback plan is defined and tested before go-live. Legacy systems are kept available for 48 hours post-cutover. We have delivered 50+ migrations with zero production incidents using this methodology.

  • Can you migrate from a non-MuleSoft platform to MuleSoft?

    Yes. We have experience migrating from IBM DataPower, Oracle Service Bus, TIBCO BusinessWorks, WSO2 ESB, MicroFocus (formerly HP) Integration Server, and custom middleware platforms to MuleSoft. Each platform has different migration patterns — we document the complete integration inventory, design functional equivalents in Mule 4, and validate equivalence through automated testing before production cutover.

  • What happens to existing API consumers during migration?

    API consumers are not disrupted during migration. We maintain existing API endpoints throughout the migration — the new MuleSoft implementation runs on the same URL, same authentication, and same response format as the legacy platform. Consumers notice zero change in behaviour. After cutover is confirmed stable, we communicate any planned breaking changes (version upgrades) with advance notice and a migration guide.

  • What is included in the migration assessment?

    The migration assessment covers: complete integration inventory documentation (flows, connectors, data mappings, error handling), technical debt identification (MEL complexity, deprecated components, missing test coverage), effort estimation per application, risk rating by integration criticality, recommended migration sequencing, and total timeline and effort estimate. Assessment typically takes 1 to 2 weeks depending on estate size.

  • Will you improve the architecture during migration?

    Yes. Migration is the right time to address architectural issues — and we recommend doing so. We introduce API-led connectivity patterns, add MUnit test coverage that was missing, improve error handling, implement API Manager policies, and align to current MuleSoft design standards during migration. The cost of architecture improvement during migration is significantly lower than doing it as a separate engagement.

  • How do you handle DataWeave migration from MEL?

    MEL (Mule Expression Language) to DataWeave 2.0 is the most technical aspect of Mule 3 to 4 migration. We have developed automated migration tooling that converts common MEL expressions to DataWeave, and our team is expert in manual migration of complex MEL logic. All migrated DataWeave transformations are unit tested against expected outputs before going live.

  • What is the total cost of a MuleSoft migration?

    Migration cost depends on estate size, code quality, and architectural changes required. A 15-application Mule 3 to 4 migration with minimal architectural changes typically costs less than a full new MuleSoft implementation of equivalent scope. A legacy ESB replacement with architecture redesign costs more due to the additional design work. We provide a fixed-price proposal after the assessment phase.

  • Do you provide support after migration?

    Yes. Post-migration support is available as a standalone support engagement or managed services package. We provide hypercare support for two weeks after every production cutover, followed by ongoing support covering monitoring, bug fixing, and MuleSoft version updates.

Trusted for overall simplicity

Based on 4,000+ reviews with customer satisfaction on
Trustpilot Trustpilot Trustpilot Trustpilot Trustpilot Trustpilot Trustpilot Trustpilot Trustpilot Trustpilot Trustpilot Trustpilot