Senior Full-Stack Engineer Needed for Custom CPQ & Pricing Engine Platform

Building a custom CPQ (Configure-Price-Quote) web application for a custom window coverings company and need an experienced full-stack developer to architect and develop a complex pricing and configuration platform. The main challenge is creating a flexible rule-based pricing engine that supports multiple suppliers with different pricing structures. The system must: • Configure products using dimensions, product types, fabrics, controls, and options • Apply supplier-specific pricing rules, rounding logic, and size restrictions • Validate compatibility between products, fabrics, motors, and control systems • Pull pricing from supplier grids and calculate surcharges, freight, margins, and final selling prices • Prevent invalid configurations before quotes are generated This is not a simple calculator. We need someone who can design scalable backend logic, database architecture, APIs, and an intuitive frontend interface. Required experience: • Full-stack web application development • CPQ, ERP, or complex business software • Rule engines and product configuration systems • Backend architecture and frontend development • Database design for complex pricing models Bonus: • SaaS product development experience • Manufacturing or custom product pricing experience Please provide: • Examples of similar full-stack systems you have built • Your role and the technologies used • How you would structure the supplier rule engine • Your recommended tech stack and architecture approach