RemoteLeaf Logo
Log in Sign up

Freelance Full-Stack Web App Developer

1 week, 1 day ago
Mexico, Argentina, Brazil, Chile, Peru, Colombia
Freelance
Mid Level
Full-stack Engineer
Software Development
Django Express.js FastAPI Flask Fly.io Git JavaScript MySQL NestJS Netlify Next.js Node.js PostgreSQL Python Railway React Render REST API SQL SQLite Svelte TypeScript Vercel Vue.js
Apply Now
Mindrift.ai: Be the “I” in AI

Mindrift.ai: Be the “I” in AI

Join 10,000+ experts earning $15-50/hr training AI models remotely. Flexible freelance work, weekly payments. No AI experience required. Apply in 5 minutes.

Internet Software & Services
View All Jobs 313

Description

  • Build interactive web applications with a frontend framework and a backend API.
  • Design and implement data models, schemas, and persistence layers using SQL or NoSQL databases.
  • Implement authentication, sessions, and basic role-based access when needed.
  • Integrate third-party APIs and AI/LLM services into product features.
  • Manage state, user input validation, error states, and loading states.
  • Build standalone Python tools, scripts, and lightweight utilities as required.
  • Review AI-generated full-stack code and refactor it for correctness, security, performance, and maintainability.
  • Write clear, testable code and debug issues across the frontend, backend, and database.

Requirements

  • At least 3 years of relevant experience in full-stack web development or shipping interactive web applications.
  • Bachelor's or Master's degree in Computer Science, Engineering, Information Technology, or a related technical field is a plus.
  • Strong command of JavaScript/TypeScript and at least one modern frontend framework such as React, Next.js, Vue, or Svelte.
  • Solid backend experience in Python (FastAPI, Flask, Django) and/or Node.js (Express, NestJS).
  • Hands-on experience with relational databases such as PostgreSQL, MySQL, or SQLite, including basic schema design.
  • Experience implementing REST APIs, request validation, error handling, and authentication flows.
  • Familiarity with deployment platforms such as Vercel, Netlify, Render, Fly.io, Railway, or similar.
  • Experience integrating LLM APIs or other AI services into product features is a strong plus.
  • Comfort with Git and basic testing practices.
  • A portfolio of shipped web applications is required.
  • English proficiency at Upper-intermediate (B2) or above is required.
  • Self-directed work ethic with the ability to architect, build, and ship features independently.

Benefits

  • Fully remote work on your own schedule with just a laptop and stable internet connection.
  • Up to $30 per hour equivalent, depending on level and pace of contribution.
  • 10–20 hours per week during active project phases.
  • Performance-based bonus programs for high-quality work and consistent delivery.
  • Hands-on experience in a hybrid environment where human experts and AI agents collaborate.

Interested in this position?

Apply directly on the company website

Apply Now

Similar Roles

Discord

Senior Full-Stack Software Engineer, Game Records

Discord 1K-5K Internet Software & Services

Discord is hiring a fullstack engineer to help build and maintain the systems and features that power gaming experiences, metadata, and discovery across its platform.

United States Full-time Senior Full-stack Engineer
$196k-$220k
Android iOS Java Kotlin Objective-C Python React Swift TypeScript
14 hours, 5 minutes ago
Xebia

Principal Fullstack Architect (AI & Agentic Systems)

Xebia 1K-5K Internet Software & Services

Xebia is hiring a Senior AI Software Engineer for an insurance technology client to help scale an AI-native underwriting platform from MVP into a production-grade system.

Moldova Poland Romania Slovakia Bulgaria Sweden Czech Republic Hungary Lead AI Engineer Full-stack Engineer
AWS Azure Databricks GCP Generative AI LLM Microservices Python React Snowflake TypeScript
14 hours, 5 minutes ago
Customer.io

Senior Fullstack SDK Engineer

Customer.io 11-50 Professional Services

Customer.io is hiring a Fullstack SDK Engineer to build and improve the developer tools and SDKs that power its communication platform across multiple mobile and backend ecosystems.

Remote
Full-time Senior DevOps Engineer Full-stack Engineer
$150k-$200k
Android Ember Go iOS Kotlin LLM Microservices Node.js React Swift
14 hours, 50 minutes ago
Pavago

Senior Full Stack Engineer

Pavago IT Services

Senior Full Stack Engineer at a remote team building an AI-assisted tax filing platform, responsible for delivering accurate, secure, production-ready features across the full stack.

Colombia Costa Rica Mexico Argentina Brazil Full-time Senior Full-stack Engineer
FastAPI JavaScript Python REST API
15 hours, 5 minutes ago

You're on a roll! Sign up now to keep applying.

Sign Up

Already have an account? Log in

Used by 14,729+ remote workers