Senior Full-Stack Engineer Job at Uncap, United States

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  • Uncap
  • United States

Job Description

We’re building a next-generation SaaS platform that combines  agentic AI with  B2B eCommerce to transform how sales teams operate—starting with seamless integration into the Shopify platform.

As our first core engineering hire, you’ll lead the end-to-end development of the application. You’ll implement AI workflows, build scalable APIs, and deliver a powerful interface that helps B2B companies streamline sales, discovery, and experience through intelligent automation.

While the initial integration is focused on  Shopify , the vision extends to supporting  multiple commerce platforms over time.

What You'll Do

  • Build and maintain the core web application: frontend, backend, and AI orchestration.
  • Develop features that assist B2B sellers with product discovery and customer interactions.
  • Integrate with Shopify’s APIs to ingest product data, manage orders, and support complex B2B workflows.
  • Implement a flexible architecture to support future integrations with other eCommerce and ERP platforms.
  • Set up multi-tenant SaaS functionality, user management, authentication, and billing.
  • Deploy, monitor, and scale the application in a secure cloud environment.
  • Collaborate directly with the founder on roadmap, prioritization, and execution.

️  What You'll Bring

Must-Have Skills:

✅ 5+ years of experience as a full-stack or backend engineer.

✅ Proven ability to build scalable, production-ready web applications.

✅ Experience working with APIs, webhooks, and data from third-party platforms (preferably Shopify or similar).

✅ Familiarity with integrating AI/ML capabilities into software products.

✅ Strong sense of ownership and ability to work independently in a startup environment.

Nice to Have:

✅ Experience with eCommerce platforms (Shopify, BigCommerce, Magento, etc.)

✅ Knowledge of vector databases, embeddings, and agent-based AI workflows.

✅ Exposure to B2B or enterprise SaaS products.

✅ Comfort with cloud infrastructure and CI/CD pipelines.

Why Join Us?

  • Work with the industry leaders of B2B eCommerce and help define the future of intelligent selling.
  • Be the founding engineer of a high-impact AI product in a massive B2B commerce space.
  • Help shape the future of intelligent selling, starting with Shopify and expanding far beyond.
  • Own your work, ship fast, and see your impact immediately.
  • Work remotely with autonomy, flexibility, and purpose.
  • Long-term opportunity to grow into a leadership or CTO role.
  • Competve Salary and Bonus Structure

Employment Type

  • Full-time (contract or employee)
  • Competitive base salary based on experience
  • Bonus structure

Job Tags

Remote job, Full time, Contract work, Immediate start, Flexible hours,

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