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Application Innovation

Application Migration Services

Move applications and their data to the cloud or a new platform with careful dependency mapping, wave planning and rehearsed cutovers that keep downtime and surprises to a minimum.

Move Applications with Confidence, Not Guesswork

Data center contracts end, hardware reaches end of life, licensing costs rise or the business simply needs the elasticity and managed services of the cloud. Whatever the trigger, migrating applications is rarely as simple as copying servers. Hidden dependencies, hard-coded IP addresses, licensing restrictions, latency between components and large databases that cannot be offline for long all turn a straightforward plan into a series of weekend emergencies.

Hanoi Technology plans and executes migrations that are boring in the best sense. We discover every application and dependency, choose the right path for each workload, group them into migration waves, rehearse cutovers and validate performance and functionality before and after the move. Because we are also an application engineering company, we can adapt code where needed, from configuration changes to replatforming onto managed services.

The Challenge

What Makes Application Migration Risky

Migration problems usually come from what was not known before the move.

Unknown Dependencies

Applications talk to databases, file shares, batch jobs and other systems in ways nobody documented, and moving one breaks another.

Downtime Constraints

Critical applications and large databases need cutover windows of minutes or hours, not days, which requires careful replication planning.

Performance Surprises

Applications that worked well on-premises slow down after migration because of latency, sizing or chatty communication between tiers.

Cost Overruns After the Move

Lifted-and-shifted workloads running on oversized instances can cost more in the cloud than they did on-premises.

Business Value

Benefits of a Well-Planned Migration

Minimal Business Disruption

Rehearsed cutovers and rollback plans keep downtime within agreed windows.

Exit from Aging Infrastructure

Retiring end-of-life hardware and data center contracts reduces operational risk and cost.

Right-Sized Cloud Costs

Sizing based on actual usage, reserved capacity and managed services keeps cloud spending under control.

Improved Resilience

Multi-zone architectures, automated backups and infrastructure as code improve availability and recovery.

A Platform for Modernization

Once in the cloud, applications can adopt managed databases, containers, serverless and AI services step by step.

Security and Compliance by Design

Landing zones with identity, network, logging and encryption controls give migrated workloads a secure foundation.

Migration Is the Start, Not the Finish

Moving an application to the cloud creates the opportunity to improve it. The most successful programs migrate quickly with the least change necessary for each workload, then optimize and modernize in the cloud, where managed services make improvements faster and cheaper.

Our Services

Hanoi Technology’s End-to-End Application Migration Services

Migration services from discovery to post-migration optimization.

Discovery and Dependency Mapping

We inventory servers, applications, databases and integrations using discovery tools and interviews, and map communication between components.

  • Application and infrastructure inventory
  • Dependency maps
  • Migration readiness assessment

Migration Strategy and Wave Planning

We select a strategy for each application, such as rehost, replatform or refactor, and group workloads into waves based on dependencies, risk and business calendars.

  • Per-application migration strategy
  • Wave plan and schedule
  • Business case and cost estimate

Landing Zone Preparation

We prepare the target environment with accounts or subscriptions, networking, identity, security controls, logging and infrastructure as code.

  • Landing zone design and build
  • Network and identity setup
  • Infrastructure-as-code templates

Application and Data Migration

We replicate servers and databases, migrate files and adapt configurations or code where needed, using native migration services and proven tools.

  • Server and database replication
  • Configuration and code adaptations
  • Data validation reports

Testing and Cutover

We run functional, performance and integration tests, rehearse cutovers and execute go-live with defined rollback criteria.

  • Test plans and results
  • Cutover runbooks and rehearsals
  • Go-live and rollback plans

Hypercare and Optimization

We support applications closely after migration, resolve issues quickly and right-size resources to optimize performance and cost.

  • Hypercare support
  • Performance and cost optimization
  • Operations handover

Our Approach

Our Application Migration Methodology

A structured approach that reduces surprises at every stage.

  1. 01

    Assess

    We discover the application landscape, map dependencies, capture performance baselines and identify technical and licensing constraints.

    Deliverables: Inventory and dependency maps · Performance baselines

  2. 02

    Plan

    We define the migration strategy for each application, group them into waves and agree cutover windows with business owners.

    Deliverables: Migration strategy · Wave plan and timeline

  3. 03

    Prepare

    We build the landing zone, set up migration tooling and run a pilot migration of a lower-risk application to validate the process.

    Deliverables: Ready target environment · Pilot migration results

  4. 04

    Migrate and Validate

    We migrate wave by wave, rehearse cutovers, test thoroughly and execute go-live with rollback plans in place.

    Deliverables: Migrated applications · Test and validation reports

  5. 05

    Optimize and Operate

    We provide hypercare, tune performance and cost and hand over to your operations team or continue as a managed service.

    Deliverables: Optimization report · Runbooks and handover

Use Cases

Application Migration Use Cases

Common migration scenarios we support.

Data Center Exit

An organization with an expiring data center contract moves its application estate to AWS or Azure in planned waves.

Line-of-Business Application to the Cloud

A company moves its ERP-adjacent applications and databases to managed cloud services to reduce maintenance.

Database Platform Migration

A business migrates from on-premises SQL Server or Oracle to managed services such as Amazon RDS, Azure SQL or Cloud SQL.

Cloud-to-Cloud Migration

An organization moves workloads between cloud providers to consolidate platforms or align with strategic agreements.

VMware Estate Migration

A company migrates virtual machines from VMware environments to cloud-native compute or managed VMware offerings.

Containerizing During Migration

A software company moves its web applications into containers on Kubernetes or managed container services as part of the migration.

Technology

Migration Tools and Platforms

We use native cloud migration services and proven third-party tools.

  • AWS Application Migration Service
  • AWS Database Migration Service
  • AWS Migration Hub
  • Azure Migrate
  • Azure Database Migration Service
  • Google Cloud Migration Center
  • Migrate to Virtual Machines
  • Terraform
  • Ansible
  • Docker
  • Kubernetes
  • Amazon RDS
  • Azure SQL Database
  • Cloud SQL
  • Datadog
  • Grafana

Platforms

Deliver Application Migration on Your Preferred Platform

Why Hanoi Technology

Why Organizations Choose Hanoi Technology

Senior, Cross-Functional Teams

Strategy, data, AI, cloud and engineering specialists work as one team, so nothing is lost between hand-offs.

Proven Delivery

More than 50 projects delivered for clients in North America, Europe and Asia-Pacific.

Radical Transparency

A written update every week and a demo of working software every sprint, so you always know where things stand.

Cost-Effective Global Delivery

Experienced engineers from our Hanoi delivery hub, with working-hour overlap for every major time zone.

+58%total orders

Success Story · Food delivery

AI dispatch and live tracking for a food delivery startup

A fast-growing urban food delivery startup was losing customers to slow deliveries at peak times. We built AI order dispatching and connected restaurants, drivers and customers in real time.

Read the Full Story

More Success Stories

Explore All Success Stories

Resources

Featured Resources

Industry trends and practical guidance to help you get more value from data, AI and technology.

Plan a Migration Without the Surprises

Tell us which applications you need to move and your timeline. We will reply within 24 hours and arrange a free consultation to outline a migration approach.

Application Migration FAQ

How do you decide how to migrate each application?

We evaluate each application’s business value, technical architecture, dependencies, licensing, performance needs and future roadmap, then choose a strategy such as rehost, replatform, refactor, repurchase, retain or retire. Rehosting is fastest when time is critical. Replatforming to managed databases or containers adds benefits with moderate effort. Refactoring is reserved for applications where the business case justifies deeper change.

How much downtime should we expect?

Downtime depends on the application, data volume and migration method. With continuous replication of servers and databases, many cutovers can be completed within a planned maintenance window of a few hours or less. Applications that cannot replicate easily may need longer windows. We define the expected downtime for each application during planning, rehearse the cutover and agree rollback criteria in advance.

How do you handle dependencies between applications?

We combine automated discovery tools, which observe network connections between servers, with interviews and configuration reviews to build dependency maps. Tightly coupled applications are grouped into the same migration wave, and where that is not possible we plan network connectivity, latency testing and temporary integration paths between on-premises and cloud environments to keep everything working during the transition.

Will our applications cost more in the cloud?

They can if workloads are moved without right-sizing. We base sizing on measured usage rather than current server specifications, use autoscaling and reserved capacity where appropriate, and recommend managed services that reduce operational effort. After migration, we review utilization and adjust resources. We also produce a cost estimate during planning so you can compare total cost of ownership before committing.

How do you keep data secure during migration?

Data is encrypted in transit and at rest, replication uses secure channels such as VPN or private connectivity, and access to migration tools is limited to named accounts with least privilege. The target landing zone includes identity, network, logging and encryption controls before any workload arrives. We validate data integrity after migration and follow your security and compliance policies throughout.

How long does an application migration program take?

A single application with few dependencies can often be migrated within a few weeks once the landing zone is ready. Larger estates are migrated in waves over several months, depending on the number of applications, complexity and business calendar constraints. Discovery and planning typically take a few weeks and dramatically reduce risk in the execution phase.