Senior JavaScript/React Engineer – AI Training (US-based)

What You'll Do6

• Curate code examples and craft solutions primarily in Python, with additional work in JavaScript (including ReactJS), C/C++, Java, Rust, and Go.
• Evaluate and refine AI-generated code to ensure it is efficient, scalable, and reliable.
• Collaborate with cross-functional teams to improve AI-driven coding solutions against industry benchmarks.
• Build agents and automated verification tools in Python that check code quality and spot error patterns.
• Form hypotheses about steps in the software engineering cycle (prototyping, architecture design, API design, production implementation, launch, experiments, monitoring, maintenance) and test model capabilities on them.
• Design automated verification mechanisms that can confirm a solution to a software engineering task.

Requirements6

• 3+ years of software engineering experience.
• Strong expertise in Python with deep knowledge of frameworks, tooling, and best practices for production software.
• Experience building full-stack applications and deploying scalable software using modern languages and tools.
• Solid grasp of software architecture, design, development, debugging, and code quality/review assessment.
• Excellent oral and written communication skills for clear, structured evaluation rationales.
• Must be based in the United States.

Preferred Qualifications2

• Shipped high-impact products at fast-moving companies like Stripe, Airbnb, Cloudflare, Datadog, or Coinbase.
• Graduated from leading programs such as Harvard, Columbia, Princeton, Yale, or University of Pennsylvania.

Who Should Apply

Candidates with at least 3 years of software engineering experience who are fluent in JavaScript/React and Python. The role suits engineers who have shipped high-impact products at high-growth companies and can assess code quality across the full development lifecycle. US-based engineers comfortable with a flexible contractor schedule.