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Senior Full-Stack AI EngineerFreelanceJobsCanada
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Senior Full-Stack AI Engineer

FreelanceJobs
  • CA
    Canada
  • CA
    Canada

À propos

We are seeking a senior full-stack engineer to enhance and scale an existing, production-ready web platform built with MERN and
The system is already live and fully functional. We are now expanding its capabilities by integrating AI-powered features, Agentic AI workflows, and LLM-based intelligence into the current architecture.
You will work across the full stack — frontend, backend, MongoDB database, AWS infrastructure, and third-party integrations (including Stripe) — to design, implement, and scale AI-driven functionality within a real-world product.
Responsibilities:
Extend and optimize the existing MERN + application
Design and integrate AI/LLM features into the backend
Implement Agentic workflows and intelligent automation systems
Maintain and improve Stripe integrations (payments, subscriptions, webhooks)
Debug and resolve production issues
Manage AWS deployments (EC2 configuration, environment setup, scaling)
Ensure performance, scalability, and clean architecture
Requirements:
Strong experience with MERN stack (MongoDB, , React, )
Hands-on expertise with (SSR, API routes, performance optimization)
Advanced backend development experience (REST APIs, authentication, middleware, security, performance tuning)
Experience integrating LLMs / AI APIs into production systems
Experience deploying and managing applications on AWS (EC2)
Ability to understand and work within an existing codebase
Strong ownership mindset and ability to deliver production-ready solutions
This role requires someone who can quickly understand the current architecture, take ownership of new features, and deliver scalable, production-level AI enhancements.
Contract duration of 1 to 3 months.
Mandatory skills: Amazon Web Services, JavaScript, LLM integration, , Webhooks, Machine Learning, AI Engineer, , TypeScript
  • Canada

Compétences linguistiques

  • English
Avis aux utilisateurs

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