Legacy Application Migration

AIGard modernizes outdated systems by re-platforming, refactoring or rebuilding them, while keeping the business running. We migrate in stages to reduce risk.

The work typically covers:

• Legacy system assessment
• Modernization strategy per application
• Incremental migration
• Data migration and validation
• Parallel running and cutover
• Documentation of the new system

Legacy Application Migration is usually the right investment in one or more of these situations:

• A system runs on unsupported technology
• Only a few people still understand the code
• Changes take too long and break things
• The system can't integrate with modern tools

On a 30-minute scoping call we confirm whether it fits your case and recommend a team shape and first milestones.

Rarely. AIGard recommends rehosting, refactoring or rebuilding for each component of a legacy application, based on risk and value.

We start with an assessment of the legacy system, reviewing existing code and architecture before recommending what to keep, refactor or replace. That produces a modernization strategy for each application, which we then deliver through incremental migration.

AIGard limits disruption during a legacy migration by migrating in stages, running old and new systems in parallel where needed, and rehearsing cutover.

Migrating in stages reduces risk, and the aim is to keep the business running while the work proceeds. Data is migrated and validated as part of the migration, and the new system is documented so your team understands what it is taking on.

From the start. Test strategy defined alongside requirements prevents defects that are expensive to remove later.

AIGard QA engineers can work inside your team, as part of a dedicated team, or as an owned testing engagement.

We review the existing code and architecture, then agree what to keep, refactor or replace.

Work is sequenced so the business keeps running while the system changes, with testing protecting behaviour that must not regress.

For Legacy Application Migration, AIGard engineers typically work with Java, .NET, Python, Node.js, Kubernetes, AWS, Azure and PostgreSQL.

The stack is selected to fit the systems you already run, and engineers are matched to it before they join.

Legacy Application Migration is available through any of AIGard’s three engagement models: staff augmentation, where engineers join your team; a dedicated team that runs the workstream; or software outsourcing, where AIGard delivers a defined project.

The choice depends on how much of the delivery you want to manage, and it can change later under the same agreement.

Engineers typically start within two to four weeks of the scoping call. The exact date depends on the roles, seniority and number of people required.

We confirm a realistic start date in writing before you commit, and you meet the proposed engineers before work begins.

AIGard engineers typically cost 30–50% less than the fully loaded cost of a comparable US-based hire, with no recruiting fees, benefits overhead or insurance costs on your side.

The figure for a specific engagement depends on the model, the roles, the seniority mix and the size of the team. We issue a written proposal after the scoping call, so the commercial terms are agreed before any work starts.

NDAs are signed before any access is given, and engineers work inside your environment under least-privilege access, with permissions limited to their responsibilities.

Access is reviewed as roles change and removed when work ends. Our practices align with ISO 27001, SOC 2, GDPR and HIPAA, with PII masking, encryption and audit logging built into data work. We review your access policies, data-handling needs and vendor requirements during scoping.

You do. Intellectual property assignment is written into every contract, in every engagement model.

That covers source code, designs, documentation, data, models and prompts produced for you. Third-party components and their licenses are identified, so ownership is clear at handover.