Need Senior FastAPI + React Architect
Budget: $5,000 – $10,000 USD
Senior FastAPI + React Architect for CPQ Rules Engine
## Role overview
Join a small, senior team to design and build a configurable CPQ (Configure-Price-Quote) rules engine used inside a complex SaaS product. You will lead architecture and implementation across a FastAPI backend and React frontend, focusing on clean design, performance, and long-term maintainability.
## What you will work on
- Design and implement scalable FastAPI services that power a CPQ/configurator or other complex logic-driven workflows.
- Build a modern React UI that lets users configure products, define rules, and get instant pricing/quoting feedback.
- Model and implement a rules engine that can express complex business logic safely and testably.
- Own technical decisions end-to-end: architecture, data models, testing strategy, and deployment considerations.
## Who this is for
- Senior engineers who have previously built a configurator, CPQ system, CAD rules engine, or similarly complex logic-based SaaS product.
- Developers who enjoy thinking long-term about clean abstractions, API contracts, and how to keep a codebase easy to change over years.
- Professionals who are comfortable working independently, communicating clearly with non-technical stakeholders, and documenting their decisions.
## Tech stack and mindset
- Backend: Python, FastAPI, relational databases, and modern API best practices (versioning, testing, observability).
- Frontend: React, component-based architecture, state management, and type-safe APIs.
- Engineering mindset: automated testing, code reviews, incremental delivery, and a strong focus on reliability and performance.
## How to apply
Please provide examples of similar CPQ/configurator systems you've built, and describe your approach to designing complex rule engines that remain maintainable over time.
## Role overview
Join a small, senior team to design and build a configurable CPQ (Configure-Price-Quote) rules engine used inside a complex SaaS product. You will lead architecture and implementation across a FastAPI backend and React frontend, focusing on clean design, performance, and long-term maintainability.
## What you will work on
- Design and implement scalable FastAPI services that power a CPQ/configurator or other complex logic-driven workflows.
- Build a modern React UI that lets users configure products, define rules, and get instant pricing/quoting feedback.
- Model and implement a rules engine that can express complex business logic safely and testably.
- Own technical decisions end-to-end: architecture, data models, testing strategy, and deployment considerations.
## Who this is for
- Senior engineers who have previously built a configurator, CPQ system, CAD rules engine, or similarly complex logic-based SaaS product.
- Developers who enjoy thinking long-term about clean abstractions, API contracts, and how to keep a codebase easy to change over years.
- Professionals who are comfortable working independently, communicating clearly with non-technical stakeholders, and documenting their decisions.
## Tech stack and mindset
- Backend: Python, FastAPI, relational databases, and modern API best practices (versioning, testing, observability).
- Frontend: React, component-based architecture, state management, and type-safe APIs.
- Engineering mindset: automated testing, code reviews, incremental delivery, and a strong focus on reliability and performance.
## How to apply
Please provide examples of similar CPQ/configurator systems you've built, and describe your approach to designing complex rule engines that remain maintainable over time.