Data contracts
Inputs, outputs, validation rules, and error shapes are explicit before they reach the interface.
Services / Systems and integrations
Connect the interface to the system behind it.
Design and implement the data flows between a product interface, backend services, payments, authentication, databases, CRMs, and automation tools.
What the engagement covers
A focused scope with visible decisions.
The work is organized around outcomes and operating constraints, not a long list of disconnected features.
01
Integration inventory, data contracts, credentials, and failure cases
02
Frontend request architecture and server-side boundaries
03
Authentication, authorization, and protected action flows
04
Payment, CRM, database, webhook, or automation integration
05
Validation, logging, retries where useful, and user-facing recovery states
06
Environment, deployment, and operating documentation
Quality criteria
What gets decided before the details multiply.
Failure behavior
Timeouts, partial results, duplicate actions, and provider failures have useful recovery paths.
Operational clarity
Secrets, environments, webhooks, and deployment details are documented for the next release.
Delivery path
Three checkpoints from context to release.
- 01
Clarify the job
Define the user, current friction, business outcome, dependencies, and what the first useful release must include.
- 02
Shape the system
Map the structure, key states, responsive behavior, technical approach, and review checkpoints before deep implementation.
- 03
Build and verify
Ship working progress, test the production path, document decisions, and leave the next owner with a clear handoff.
Questions
Useful answers before the first call.
Can you connect an existing frontend to a new API?
Yes. I can connect React or Next.js screens to REST, GraphQL, payment, CRM, or automation APIs with explicit loading, empty, error, and success states.
Do you work on checkout and payment integration issues?
Yes. Integration work can include checkout flows, webhook handling, signature validation, form submissions, and user-facing payment states.
Can you improve reliability from the frontend side?
Yes. Typed request contracts, input validation at the boundary, retries with backoff, idempotency keys on writes, and a defined fallback for every third-party call.
Bring the current situation