Architects / Migration
The architect who turns a 4-year rewrite
into a 3-month migration
Migrations fail when the technical lead doesn't understand both the legacy system and the target framework. A DEX Migration Architect bridges that gap — they've done dozens of migrations across Oracle Forms, SAP, and PeopleSoft. They know the patterns, the edge cases, and the shortcuts that save months.
What a Migration Architect does
They lead the technical execution from analysis to cutover. Every decision — schema conversion strategy, parallel operation timing, business logic validation approach — runs through the migration architect.
Legacy code analysis
Deep analysis of .fmb files, ABAP modules, or PeopleCode programs. Maps every form, trigger, LOV, and business rule to the target framework's JSON descriptor architecture.
Migration engine configuration
Configures the automated migration engine parameters — conversion rules, naming conventions, data type mappings, and business logic translation patterns specific to your codebase.
Schema conversion coordination
Works with your DBAs to convert database schemas, migrate stored procedures, and ensure referential integrity. Handles the differences between Oracle, SQL Server, PostgreSQL, and cloud-native databases.
Business logic equivalence
Validates that every business rule, calculation, and workflow in the legacy system produces identical results in the new system. Automated regression testing at every step — not just at the end.
Why migrations fail without one
The typical enterprise migration fails for one of three reasons: the team underestimates the complexity of legacy business logic, the cutover plan doesn't account for parallel operation, or the project loses momentum when edge cases accumulate. A migration architect has seen all three failure modes — across dozens of engagements — and knows how to prevent them.
The pattern we see: An enterprise starts a "rewrite" with a general-purpose development team. After 18 months, they've rebuilt 30% of the system and discovered that the remaining 70% contains the business logic that actually matters. The project stalls. A migration architect avoids this by starting with the business logic analysis — identifying complexity before writing a single line of code.
How they compress timelines
Speed comes from pattern recognition. A migration architect who has converted 500 Oracle Forms knows that a specific trigger pattern maps to a specific JSON descriptor configuration. They don't debug — they recognize and apply. The automated migration engine handles 60-80% of the conversion. The architect handles the 20-40% that requires judgment.
Of screens converted automatically by the migration engine with architect-configured parameters.
Requiring manual architect intervention — complex business logic, custom triggers, edge cases.
Typical migration timeline for a 200-500 screen legacy application with a dedicated migration architect.
Business logic equivalence validated through automated regression testing at every milestone.
Engagement model
Migration architects are typically engaged full-time for the duration of the migration — 1 to 3 months depending on system complexity. After migration completes, they either transition to a maintenance role, hand off to a security or innovation architect, or train your internal team to manage the system independently.
Full-time embedded architect
A named migration architect leads the technical execution from day one. They work inside your organization, coordinate with your DBAs and business analysts, and own the migration timeline.
- Full legacy codebase analysis and migration plan within the first week
- Daily progress reporting with screen-level conversion tracking
- Parallel operation coordination — old and new systems running side by side
- Business logic equivalence validation at every milestone
- Cutover planning and execution with rollback procedures
Handoff and transition
Once migration is complete, the architect documents the system architecture, trains your team on the framework, and transitions responsibilities. Most teams are self-sufficient within 2-4 weeks of migration completion.
- Complete system documentation and architecture diagrams
- Team training on the DEX framework and AI builder
- Transition to a security or innovation architect if ongoing support is needed
- 30-day post-migration support for edge cases and stabilization
Common questions
What legacy systems has the migration architect worked with?
Oracle Forms (all versions from 6i to 12c), SAP GUI/ABAP modules, PeopleSoft PeopleTools, and Oracle APEX. The migration engine and architect expertise cover the most common enterprise legacy stacks. If your system isn't listed, the assessment will determine feasibility.
How do you handle stored procedures and database-level business logic?
The migration architect works with your DBAs to catalog every stored procedure, package, and trigger. Logic that should move to the application layer is migrated. Logic that should stay in the database is converted to the target database's syntax. Nothing is lost — everything is mapped.
What if the migration takes longer than estimated?
Estimates are based on the initial legacy code analysis, which identifies complexity before the migration starts. Scope creep is the main risk — the architect manages this by freezing the legacy scope at analysis time and tracking any new requirements separately. In practice, most migrations complete within the estimated window.
Can we keep the legacy system running during migration?
Yes — parallel operation is the standard approach. The legacy system continues running while the new system is built and validated alongside it. Cutover happens only after business logic equivalence is confirmed. Users can be migrated in phases — department by department — to reduce risk.
What does the migration architect hand off when the project is complete?
A fully documented system architecture, a trained internal team (or a transition to an embedded security or innovation architect), 30 days of post-migration support, and a system that's ready for continuous expansion through the AI builder.
Stop rewriting. Start migrating.
A migration architect can have your legacy system analysis complete within the first week. The full migration follows a predictable, milestone-driven timeline.