AI-First Full Stack Developer
Worldwide
We are looking for an experienced **AI-First Solution Architect / Lead Full-Stack Engineer** to help design and build a scalable, secure, and production-ready SaaS platform. The ideal candidate should not only be a strong developer but also a strategic technical partner who can guide architecture decisions, recommend the right tech stack, and ensure the product is built for long-term performance, maintainability, and growth. You will be responsible for translating business requirements into a clean technical architecture, building high-quality frontend and backend systems, and setting up the foundation for a scalable SaaS product. **Responsibilities:** - Design a scalable and maintainable SaaS architecture from the ground up - Build responsive, high-performance frontend interfaces using React.js / Next.js - Develop secure and efficient backend APIs using Node.js / Express - Work with TypeScript across the stack for reliability and clean development - Design database schemas, API structures, caching strategies, and data flows - Optimize application performance, Core Web Vitals, and overall user experience - Set up clean code structure, CI/CD workflows, and deployment-ready architecture - Help us choose the right tools, databases, hosting, and infrastructure patterns - Refactor or improve existing systems where needed - Provide technical guidance on scalability, security, and long-term product growth **Required Skills:** - Strong experience with React.js, Next.js, TypeScript, Node.js, and Express - Experience building SaaS platforms, dashboards, admin panels, or complex web apps - Solid understanding of frontend architecture, SSR, SSG, routing, and state management - Experience with REST APIs and/or GraphQL - Strong knowledge of database design, API optimization, and scalable backend systems - Ability to write clean, modular, maintainable code - Experience with cloud deployment, CI/CD, and performance optimization - Good understanding of security, scalability, and production-level development **Nice to Have:** - Experience with AI-first products or AI integrations - Experience modernizing legacy applications or monolithic systems - Experience with high-traffic platforms, multi-tenant SaaS, or enterprise-grade systems - Strong UI/UX sense and ability to build polished, premium user experiences **Who We're Looking For:** We need someone who can think beyond just writing code. You should be able to understand the business goals, suggest better technical approaches, identify risks early, and help us build a product that is stable, scalable, and built to last. This role is best suited for someone with strong architectural thinking, full-stack execution ability, and experience delivering production-ready SaaS applications. **To Apply:** Please share: 1. Examples of SaaS or complex web applications you have built 2. Your experience with React, Next.js, TypeScript, Node.js, and cloud deployment 3. How you usually approach architecture planning for a new product 4. Any experience you have with AI integrations or scalable SaaS systems --- ⚠️ **IMPORTANT NOTE — Please Read Before Applying:** Proposals submitted **without a portfolio** will be **automatically rejected**. We receive a high volume of applications and only review candidates who can demonstrate real, production-level work. Please make sure your proposal includes: - **Live links** to projects you have built - **GitHub profile** or code samples - **App Store / Play Store links** if applicable We are looking for a long-term technical partner who can help us build a reliable, high-performing product from concept to production. Only serious applicants with proven work should apply.
- More than 30 hrs/weekHourly
- 6+ monthsDuration
- IntermediateExperience Level
$15.00
-
$35.00
Hourly- Remote Job
- Ongoing projectProject Type
Skills and Expertise
Activity on this job
- Proposals:50+
- Last viewed by client:2 days ago
- Interviewing:1
- Invites sent:0
- Unanswered invites:0
About the client
- SpainTalavera De La Reina9:10 AM
- $555 total spent2 hires, 0 active
- Transportation & WarehousingIndividual client
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