Solution architecture for complex multi-system problems.
When the problem involves integrating multiple systems, migrating from legacy infrastructure, or designing a platform that must support multiple downstream consumers — solution architecture provides the plan before the code.
Need solution architecture for a complex system — multi-system integration, legacy migration, or platform design
Solution architecture is needed when:
Multiple systems must work together: The application must read from a legacy ERP, write to a Postgres database, and expose data via an API to mobile clients. The architecture defines: which system is the source of truth, how sync happens, how conflicts are resolved.
A legacy system must be replaced without downtime: The strangler fig pattern — build new functionality alongside the old system, route traffic gradually, retire old functionality incrementally. Getting this sequence right prevents data loss and downtime.
A platform must support multiple consumers: An API product that multiple frontends consume. The API design must accommodate current use cases and anticipated future ones without breaking changes.
Scale decisions must be made upfront: Message queues vs synchronous calls. Event sourcing vs CRUD. Microservices vs monolith. These decisions are expensive to undo.
What a solution architecture document contains:
- Current state: what exists
- Future state: what is being built
- Integration points: how systems connect
- Data flow: where data originates and how it moves
- Migration sequence: if replacing existing systems
- Risk register: known technical risks and mitigations
Architecture document with system design, integration approach, data flow, and implementation sequence — before any code is written
Architecture diagram
(system context, containers, components)
Data flow documentation
Integration specification
Migration sequence
if applicable
Implementation recommendation
with rationale
One honest number to start.
Fixed-scope, fixed-price. The number below is the starting point — final scope is built from your brief.
Architecture document with system design, integration approach, data flow, and implementation sequence — before any code is written
Three steps, every time.
The same repeatable engagement on every project. No surprises, no mystery, no billable ambiguity.
Brief & discovery.
We send you questions, then get on a call. Output: a written scope with every step, feature, and integration listed.
Build & ship.
Fixed schedule, weekly reviews. No scope creep unless you change the scope — and if you do, we reprice it transparently.
Warranty & retainer.
30-day warranty on every launch. Most clients stay on a monthly retainer for ongoing features and maintenance.
Why Fixed-Price Matters Here
Architecture deliverables are defined documents and diagrams. Fixed-price.
Questions, answered.
Both options: architecture only (if the implementation is done by another team), or architecture + implementation (full engagement). The architecture document is the foundation either way.
Tell Ryel about your project.
Describe what you’re building and what outcome you need. You’ll have a written, fixed-price scope within the week.