Nextmark

Full-Stack Engineer (Frontend-focused)

Contractor · Remote · 10 openings

In this role, you'll apply your expertise to help train next-generation AI systems. Your work will shape how models learn, reason, and perform through high-quality, real-world input. No prior experience in AI is required — your domain knowledge is what matters.

Key Responsibilities

  • Design, develop, and optimize robust frontend solutions using React, HTML, and CSS.
  • Collaborate closely with backend engineers to deliver seamless, end-to-end user experiences.
  • Contribute to backend systems using Node.js and optionally Python, Java, or .NET based on project requirements.
  • Maintain high standards of code quality, performance, and usability across the stack.
  • Participate actively in agile ceremonies, code reviews, and technical discussions within a distributed team environment.
  • Translate complex business needs into technical implementation with clear written and verbal communication.
  • Continuously research and apply industry best practices to improve our applications and workflow.

Required Skills & Qualifications

  • Expertise in building responsive UIs with React, HTML, and CSS.
  • Strong proficiency with Node.js for backend development.
  • Proven track record working as a full-stack or frontend-focused engineer on production web projects.
  • Solid understanding of RESTful APIs and integration best practices.
  • Exceptional written and verbal communication skills, with a collaborative mindset.
  • Ability to thrive in a fast-paced, remote-first work environment.
  • Experience with modern development workflows, version control, and agile methodologies.

Preferred Qualifications

  • Backend experience with Python, Java, or .NET. (Anyone is fine)
  • Background in cloud services or scalable, distributed systems.
  • Demonstrated passion for delivering polished user experiences and high-quality code.

$30–$90/hr

Remote