Sr. Full-Stack Software Engineer, Remote

Xperteez Technology•,
•$50 - $100•Remote

About The Position

This remote contract role involves developing, modifying, and debugging front-end and back-end application components. The engineer will implement user-facing features and the services, APIs, and data models behind them, trace requests and data through browsers, applications, APIs, services, databases, and external integrations, and work within unfamiliar repositories and existing architectures. The role also includes diagnosing failures across application state, API contracts, authentication, persistence, networking, and deployment; evaluating and improving code written in multiple languages; and reviewing AI-generated solutions for correctness, completeness, performance, security, and maintainability. Compensation is output-based: experts are paid per task that meets project specifications. Task completion time may vary by experience and workflow, minimum submission requirements apply, and experts must submit a minimum number of tasks per week. Selected candidates are expected to begin their first tasks within 24–48 hours after onboarding.

Requirements

  • Strong professional experience developing production full-stack applications.
  • Meaningful hands-on experience with both front-end and back-end engineering.
  • Production experience with multiple programming languages.
  • Strong knowledge of browser applications, APIs, application state, databases, and service integration.
  • Experience understanding and contributing to the architecture of complete software systems.
  • Ability to work effectively in unfamiliar codebases.
  • Strong debugging and technical problem-solving skills.
  • Python, React, JavaScript, Java, Node.js, Rust, Golang, and TypeScript.

Responsibilities

  • Develop, modify, and debug front-end and back-end application components.
  • Implement user-facing features and the services, APIs, and data models that support them.
  • Trace requests and data across browsers, front-end applications, APIs, services, databases, and external integrations.
  • Work inside unfamiliar repositories and understand existing application architecture.
  • Diagnose failures involving application state, API contracts, authentication, persistence, networking, and deployment.
  • Evaluate and improve code written in multiple programming languages.
  • Review AI-generated solutions for correctness, completeness, performance, security, and maintainability.
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