Migrate from FastAPI to React + Go
Your SaaS, AI service or integration has an API but still lacks a reliable product around it? We separate the UI, API and heavy jobs, migrate agreed services to Go and retain useful Python models behind a dedicated API.
What teams build with FastAPI
- APIs for SaaS and mobile apps
- AI and ML services
- Integrations and data processing
- Microservices and internal tools
Platform vs our custom development
| Parameter | FastAPI | Our development · React + Go |
|---|---|---|
| Architecture | Audit coupling between UI, computation and server logic | Separate React screens, Go API and calculation services |
| Long operations | Audit workers, timeouts and job execution | Queues, task status and controlled retries |
| Reliability | Find failure causes in the current application | Workflow checks, metrics and error monitoring |
What holds your project back
An API is not a finished product
FastAPI provides an API foundation and documentation. The interface, admin, authorization and workflows still need separate design; a handful of prototype endpoints can turn into fragmented services.
Blocking work inside async handlers
A synchronous HTTP client, expensive calculation or other blocking call inside an async handler delays the event loop and other requests. I/O and computation need separate handling.
Background work tied to the API process
BackgroundTasks suits small post-response actions. Long jobs needing retries and durable execution require a separate queue and workers; otherwise execution depends on the API process staying alive.
What you gain after migration
Interface for real workflows
We design React screens, mobile layouts and customer accounts around daily work, including loading states and clear error handling.
Clear API and computation boundaries
We move agreed modules to a Go API and long jobs to a queue. Valuable Python models and calculations can remain separate services.
Reliability checks before switching
We verify authorization, data and integrations and measure response time and load on your workflows. Success is measured, not assumed from a language choice.
Maintainable code handover
We deliver the repository, documentation, key operation tests and startup instructions, plus logging and error monitoring.
Management tools for your team
We agree on the features you need and connect the services you already use.
Accounts and access control
We agree on roles, actions and data access for staff and customers.
Jobs and computation results
Users see progress, errors and saved results for long operations.
Management and integrations
We build team workflows and connect existing external services.
Migration process
We verify data and workflows before switching to the new system.
Python application audit
Map data, dependencies, roles, APIs and jobs. Measure problem workflows and document behavior that must remain compatible.
Module-by-module migration
Build the React interface and Go API in staging, retain useful Python services and compare data and integrations with the live version.
Verification and switchover
Check load, access and workflows, synchronize recent data and agree on a switchover window and rollback plan. Public pages also receive URL and SEO checks.
Migration questions
Official platform resources
Migration Blueprint
Discuss Your Migration
Tell us about your current system. We'll analyze the architecture, outline a zero-downtime React + Go migration, and estimate the first sprint.
- Full audit of your current stack & database
- Preserve 100% SEO equity and URL redirects
- First sprint estimate within 24h
- 100% IP & code handover, zero vendor lock-in