Full Stack Software Engineer (Frontend Backend)

Company Description About Mostly Materials Mostly Materials is building a technology-driven building materials marketplace connecting customers, manufacturers, distributors, and logistics partners through a modern digital platform.

About: Build and scale the Mostly Materials marketplace platform

Responsibilities

• Develop scalable web applications.
• Build responsive frontend using React/Next.js.
• Develop backend APIs and business logic.
• Design PostgreSQL databases.
• Integrate authentication, payments, notifications, and logistics APIs.
• Build inventory, quotation, order management, wallet, and vendor modules.
• Optimize performance and security.
• Collaborate with designers and founders.

Required Skills

JavaScript, TypeScript, React, Next.js, Node.js, Express/NestJS, PostgreSQL, REST APIs,

Git/GitHub, Docker, Cloud Deployment, Authentication, Payment Gateway Integration.

Preferred

Supabase, Redis, Elasticsearch, AI integration, Marketplace or e-commerce experience.

Experience

3–6 years; must have shipped production applications.

Nice to Have

• Experience building B2B marketplaces
• ERP integration
• Inventory management systems