Salary: £? - ? per year

Several years of software engineering experience (3+ years)
Strong expertise building full-stack applications using Python and JavaScript (React, Node.js), able to work across backend and frontend codebases
Experience deploying scalable, production-grade software using modern languages and tools
Deep understanding of software architecture, design, development, debugging, and code quality/review assessment
Excellent oral and written communication skills for clear, structured evaluation rationales

Create datasets for training, benchmarking, and advancing large language models by curating code examples, providing precise solutions, and making corrections across the full stack
Work across Python (backend and ML workflows) and JavaScript (React, Node.js) and occasionally C/C++, Java, Rust, and Go
Evaluate and refine AI-generated code for efficiency, scalability, and reliability in backend and frontend contexts
Collaborate with researchers and cross-functional teams to enhance AI-driven coding solutions and meet industry performance benchmarks
Build agents that verify code quality and identify error patterns across full-stack applications
Hypothesize and evaluate model capabilities across software engineering cycle steps (prototyping, architecture design, API design, production implementation, launch, experiments, monitoring, operational maintenance)
Design verification mechanisms that can automatically verify solutions to software engineering tasks
Ideal background: engineers who have built production systems at high-scale organizations (e.g., Google, Microsoft, Apple, Amazon, Meta) or graduates from leading programs; exceptional experience and skill take precedence

Title: Remote Senior JavaScript/React Engineer (Java engineer role mentioned) - Salary: 200–300 USD per hour - Tech stack: JavaScript, React, Python, Java, FastAPI (also Node.js, C/C++, Rust, Go referenced) - Category: Java Developer / Engineer - Location address: 548 Market Street, PMB 18282, San Francisco, United States - Work arrangement: Fully home office / remote work; flexible work time - Engagement details: flexible engagement, minimum 10 hrs/week up to 40 hrs/week; contractor (no medical/paid leave); duration 1 month (potential extensions); candidates must be based in the United States - Evaluation process: application takes 15–30 minutes; completion of an AI video interview is required - Additional: View this job and over 500 other transparent jobs with salaries & tech stacks on DevITJobs

last updated 21 week of 2026

Senior JavaScript/React Engineer

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