Cloud Migration Consulting for Java Applications
We work out what a move to AWS, Azure or another cloud will cost to run, which parts of the application need to change first and how to cut over without losing data. The first iteration settles the target and the cutover plan; the migration then runs in phases you approve.
Results from systems we have built and improved
- 80%
- lower infrastructure cost on hotel availability searchDatabase queries moved to an in-memory data gridHotel search case study
- ~4 weeks
- to move an online store and ERP from Java 17 to Java 25Spring 6.2 upgrade · no rewrite, no feature freezeWine merchant case study
- 1,000,000,000
- financial transactions processed in the cloud in under an hourFastPost accounting platform · developed for LegerityFastPost case study
- For
- Java applications moving from on-premise or existing hosting.
- First iteration
- Settles the target environment, costs and cutover plan.
- Implementation
- Typically 6 to 12 weeks per scoped phase.
- Pricing
- Time and materials against a written ballpark.
What cloud migration consulting covers
First we measure what the application really uses and what it will cost to run in the cloud.
Workload and dependencies
Services, integrations, data volumes and traffic mapped, and resource use measured before anyone picks instance sizes and storage.
Target design and costs
AWS, Azure or your existing cloud compared, with three-year operating costs modeled and the workload, data transfer, support and capacity assumptions written down.
Data and cutover
Database, cache and file migration planned with the application, and validation, maintenance windows and recovery agreed around the connected systems.
Operations and access
Connectivity, identity, secrets, monitoring and ownership defined. Managed services are used where their operating benefit justifies the cost.
What a cloud migration delivers
The first iteration ends in a decision and a plan, and the move starts once you approve it.
First iteration: a decision and a plan
An inventory, target design options, cost estimates, risks and the migration order, with the plan for the rest of the phase. The findings are yours to use.
Implementation: a working migration
The agreed infrastructure and application changes, validation results and operating documentation. After rollout, actual resource use and costs are compared with the first iteration’s assumptions.
Stratoflow was a great partner, challenging as well as supporting our customer projects for the best outcome. They have a great pool of talent within the business - all very capable technologists, as well as being business-savvy and suitable for consultancy engagements.
How a cloud migration runs
The move runs in phases of typically 6 to 12 weeks, each one approved before it starts.
Scope the move
Discuss deadlines, current hosting, access and the business reason for moving. A written ballpark follows within a week.
Compare the options
Measure the workload and dependencies. Review target designs, running costs and whether application changes are needed before migration.
Migrate an agreed scope
Prepare infrastructure, rehearse data movement where applicable and validate the application against agreed acceptance criteria.
Roll out and review
Use the agreed cutover and recovery plan. Hand over operational guidance and schedule cost reviews, typically at 30 and 90 days.
Questions about cloud migration
How are your cloud migration consulting services priced?
Time and materials against the written ballpark you receive after the scoping call. The first iteration confirms the scope; if its findings change the ballpark, we say so before the work continues. Changes to agreed scope are discussed and priced before additional work begins. Cloud-provider charges are separate and depend on actual usage.
Which cloud should we choose?
We compare the options around your workload, existing contracts, security requirements and operating skills. AWS and Azure are common choices; we can also consider Google Cloud or existing hosting where relevant. Staying with the current environment may be the right decision.
Can we move first and improve the architecture later?
Yes, where deadlines or application constraints support that approach. We compare the interim running cost and follow-up work with making selected changes before the move.
Will there be downtime?
Some changes need a maintenance window. The first iteration identifies continuity requirements, data consistency constraints and recovery options. We agree the cutover approach before the move.
How long does a migration take?
Typically 6 to 12 weeks for a scoped phase, starting with an iteration that settles the target. The total depends on the applications, data volumes, integrations and release windows. The first iteration establishes the initial sequence and estimate.
Do you migrate legacy applications that were not built for the cloud?
Yes. Legacy application migration often needs changes before the move: configuration taken out of the code, local file storage replaced, sessions made stateless. The first iteration lists those changes and estimates whether to make them before the move or after it.
How do you differ from a large cloud migration company?
Large providers of cloud migration services often move many workloads at once with rehosting tools. We work on Java applications where the code has to change for the move to pay off, and the engineers who assess the system carry out the migration.
Related services
Plan your cloud migration
Discuss the systems, deadlines and operating constraints that shape your move.