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Javascript Typescript Developer Evening Jobs (NOW HIRING)

... developer experience. Our team includes alumni of Two Sigma, Citadel Securities, Flow Traders ... This role is primarily focused on TypeScript/JavaScript, with some full-stack/Python work as well.

Title: Sr. Developer (Javascript, ReactJS) 12 months Contract Remote Job as per Chicago, IL timings ... Typescript . Redux applications (ES6+) . Javascript . ADA Compliance . Responsive Design . Unit ...

Front End Software Developer

Chantilly, VA

$106K - $123K/yr

We are seeking a skilled Software Developer to contribute to the design, development, and ... JavaScript/TypeScript frameworks (Angular, React.js, or Vue.js), HTML, CSS * Back-End & API ...

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As of Aug 8, 2026, the average yearly pay for javascript typescript developer evening in the United States is $106,583.00, according to ZipRecruiter salary data. Most workers in this role earn between $66,000.00 and $128,000.00 per year, depending on experience, location, and employer.
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Javascript - Senior Developers - AI Training - Sacramento, US

Prolific

Remote

Full-time

Re-posted 22 days ago


Job description

Job Summary:
Prolific is a leader in the AI space, focused on building a vast pool of quality human data for AI training. They are seeking JavaScript Experts to evaluate and train AI models using real engineering expertise, ensuring code accuracy and providing structured feedback on model performance.
Responsibilities:
• Evaluate Code Accuracy: review AI-generated JavaScript and TypeScript code for functional correctness and adherence to best practices.
• Validate Logic & Reasoning: audit the step-by-step explanations provided by AI for complex algorithmic solutions to ensure they are logically sound.
• Conduct Execution Testing: execute model-generated scripts in appropriate environments (Node.js or Browser consoles) to verify performance and output.
• Annotate Model Performance: identify areas where a model provides inefficient solutions, deprecated syntax, or hallucinated library methods.
• Refine Technical Logic: provide structured feedback on how models reason through frontend or backend architecture discussions.
Qualifications:
Required:
• Education: a BS, MS, or PhD in Computer Science, Software Engineering, or a closely related technical field.
• Professional Experience: professional experience building scalable web applications using JavaScript/TypeScript.
• Coding Proficiency: ability to solve LeetCode Medium to Hard-level problems in JavaScript independently.
• Deep Domain Knowledge: expert understanding of the Event Loop, closures, prototypical inheritance, and asynchronous patterns (Promises, async/await).
• Code Quality: a high standard for clean code, including modularity, readability, and adherence to modern ES6+ standards.
• Attention to Detail: ability to spot subtle logical flaws, memory leaks, or security vulnerabilities (e.g., XSS, prototype pollution) in model-generated code.
• Core Language: expert mastery of JavaScript (ES6+) and TypeScript.
• Frameworks: extensive experience with React, Node.js, Vue, or Angular.
• Testing & Tools: proficiency with Jest, Cypress, Webpack, and Vite.
• Backend & API: strong understanding of RESTful APIs, GraphQL, and server-side logic in a Node environment.
Company:
Building the most advanced global infrastructure for People Science. Founded in 2014, the company is headquartered in London, GBR, with a team of 51-200 employees. The company is currently Growth Stage.