Mercor

Evaluate and compare frontend web page replications for fidelity and correctness, providing detailed rationales. | 3+ years frontend development, strong HTML/CSS skills, JavaScript knowledge, browser devtools proficiency, and strong written communication. | About The Job Mercor connects elite creative and technical talent with leading AI research labs. Headquartered in San Francisco, our investors include Benchmark, General Catalyst, Peter Thiel, Adam D'Angelo, Larry Summers, and Jack Dorsey. Position: Frontend Engineer — Web Replication Preference Rater Type: Contract Compensation: $90/hour Location: Remote Role Responsibilities • Render a reference page and two candidate replications side by side at desktop width. Judge which is the closer reproduction. • Diff layout fidelity in detail, including box model, typography, color, image handling, and overflow. • Inspect underlying markup with browser devtools to distinguish genuinely correct replications from those that merely look correct. • Evaluate responsive behavior and semantic quality, ensuring proper use of flexbox and grid. • Write structured rationales for every judgment, ranking defects by importance in precise language. • Flag ties, ambiguous cases, and broken task items rather than forcing a preference. Qualifications Must-Have • 3+ years of professional web development experience, primarily in frontend or full-stack work. • Fluency in hand-written HTML and CSS. • Working command of browser devtools. • Enough JavaScript to read scripts and understand DOM manipulation. • Comfort in a terminal for local server setup. • Strong written English and discipline to justify judgments. Preferred • Prior RLHF, preference labeling, or model evaluation work. • Code review or technical assessment background. • Pixel-perfect design-to-code experience. • Web accessibility expertise (WCAG, ARIA). • Familiarity with LLMs' typical failures in codegen. • Web scraping or DOM parsing experience. Application Process (Takes 20–30 mins to complete) • Upload resume • AI interview based on your resume • Submit form Resources & Support • For details about the interview process and platform information, please check: https://talent.docs.mercor.com/welcome • For any help or support, reach out to: support@mercor.com PS: Our team reviews applications daily. Please complete your AI interview and application steps to be considered for this opportunity. ,

Evaluate frontend code replications for fidelity and correctness with detailed analysis and structured rationales. | 3+ years frontend development, fluency in HTML/CSS, browser devtools proficiency, strong written communication, and familiarity with JavaScript and terminal usage. | About The Job Mercor connects elite creative and technical talent with leading AI research labs. Headquartered in San Francisco, our investors include Benchmark, General Catalyst, Peter Thiel, Adam D'Angelo, Larry Summers, and Jack Dorsey. Position: Frontend Engineer — Web Replication Preference Rater Type: Contract Compensation: $90/hour Location: Remote Role Responsibilities • Render a reference page and two candidate replications side by side at desktop width. Judge which is the closer reproduction. • Diff layout fidelity in detail, including box model, typography, color, image handling, and overflow. • Inspect underlying markup with browser devtools to distinguish genuinely correct replications from those that merely look correct. • Evaluate responsive behavior and semantic quality, ensuring proper use of flexbox and grid. • Write structured rationales for every judgment, ranking defects by importance in precise language. • Flag ties, ambiguous cases, and broken task items rather than forcing a preference. Qualifications Must-Have • 3+ years of professional web development experience, primarily in frontend or full-stack work. • Fluency in hand-written HTML and CSS. • Working command of browser devtools. • Enough JavaScript to read scripts and understand DOM manipulation. • Comfort in a terminal for local server setup. • Strong written English and discipline to justify judgments. Preferred • Prior RLHF, preference labeling, or model evaluation work. • Code review or technical assessment background. • Pixel-perfect design-to-code experience. • Web accessibility expertise (WCAG, ARIA). • Familiarity with LLMs' typical failures in codegen. • Web scraping or DOM parsing experience. Application Process (Takes 20–30 mins to complete) • Upload resume • AI interview based on your resume • Submit form Resources & Support • For details about the interview process and platform information, please check: https://talent.docs.mercor.com/welcome • For any help or support, reach out to: support@mercor.com PS: Our team reviews applications daily. Please complete your AI interview and application steps to be considered for this opportunity. ,

Evaluate AI-generated artifacts for quality and provide structured feedback to improve AI model outputs. | Requires 5+ years in operations/inventory/capacity planning, proficiency in Microsoft Office and Google Workspace, and native or professional English fluency. | About The Job Mercor connects elite creative and technical talent with leading AI research labs. Headquartered in San Francisco, our investors include Benchmark, General Catalyst, Peter Thiel, Adam D'Angelo, Larry Summers, and Jack Dorsey. Position: Operations / inventory / capacity planning Evaluator Type: Contract Compensation: $80–$120/hour Location: Remote Role Responsibilities • Evaluate AI-generated artifacts against domain-specific quality rubrics. • Identify factual, aesthetic, and presentation errors in documents, spreadsheets, and slide decks. • Provide clear, structured written feedback to improve AI model outputs. • Collaborate with AI research teams to enhance training data quality. • Work independently and asynchronously to meet deadlines while improving AI model performance. Qualifications Must-Have • 5+ years of relevant professional experience in Operations / inventory / capacity planning. • Native or professional fluency in English. • Highly proficient in Microsoft Office and Google Workspace, especially Slides (Google Slides / PowerPoint). Preferred • Advanced degree (Master's or higher) from a reputable institution. Application Process (Takes 20–30 mins to complete) • Upload resume • AI interview based on your resume • Submit form Resources & Support • For details about the interview process and platform information, please check: https://talent.docs.mercor.com/welcome • For any help or support, reach out to: support@mercor.com PS: Our team reviews applications daily. Please complete your AI interview and application steps to be considered for this opportunity.

Build and ship full-stack applications and integrate pre-release model APIs with strong collaboration and documentation. | 3+ years professional experience with production software, proficiency in multiple languages, full-stack hands-on experience, strong communication, and ability to work 40 hours/week remotely. | About The Job Mercor connects elite creative and technical talent with leading AI research labs. Headquartered in San Francisco, our investors include Benchmark, General Catalyst, Peter Thiel, Adam D'Angelo, Larry Summers, and Jack Dorsey. Position: Software Engineer, Full Stack (Python, Java, Rust, C#, C++) Type: Contract Compensation: $50–$65/hour Location: Remote Commitment: 40 hours/week Role Responsibilities • Build and ship full-stack applications, services, and internal tools using Python, Java, Rust, C#, C++, or TypeScript to exercise frontier model capabilities end to end. • Integrate pre-release model APIs into working software, including tool interfaces, evaluation harnesses, and telemetry. • Diagnose and document model and integration failure modes, translating engineering observations into clear written feedback for the research team. • Prototype quickly against shifting requirements, delivering working increments with limited up-front specification. • Collaborate with the engineering manager and other engineers to maintain consistency in code quality, architecture, and technical documentation. Qualifications Must-Have • 3+ years of dedicated professional experience building and shipping production software at a recognized, top-tier organization. • Production experience in at least one of Python, Java, Rust, C#, or C++, plus working proficiency in a second language. • Hands-on experience across the stack: backend services and APIs, a modern front-end framework (React or equivalent), relational or document databases, and cloud deployment. • Demonstrated ability to onboard onto an unfamiliar codebase and deliver working code quickly with minimal ramp-up. • Ability to engage reliably for at least 40 hours/week during weekdays. • Strong written communication skills and the ability to explain complex technical decisions clearly. Compensation & Legal • W-2 employment with Cincinnatus LLC. • Paid weekly via Stripe Connect. Application Process (Takes 20–30 mins to complete) • Upload resume • AI interview based on your resume • Submit form Resources & Support • For details about the interview process and platform information, please check: https://talent.docs.mercor.com/welcome • For any help or support, reach out to: support@mercor.com PS: Our team reviews applications daily. Please complete your AI interview and application steps to be considered for this opportunity.

Build and ship full-stack applications and integrate model APIs while collaborating on code quality and documentation. | 3+ years professional experience with production software in Python, Java, Rust, C#, or C++, plus strong communication and ability to quickly onboard unfamiliar codebases. | About The Job Mercor connects elite creative and technical talent with leading AI research labs. Headquartered in San Francisco, our investors include Benchmark, General Catalyst, Peter Thiel, Adam D'Angelo, Larry Summers, and Jack Dorsey. Position: Software Engineer, Full Stack (Python, Java, Rust, C#, C++) Type: Contract Compensation: $50–$65/hour Location: Remote Commitment: 40 hours/week Role Responsibilities • Build and ship full-stack applications, services, and internal tools using Python, Java, Rust, C#, C++, or TypeScript to exercise frontier model capabilities end to end. • Integrate pre-release model APIs into working software, including tool interfaces, evaluation harnesses, and telemetry. • Diagnose and document model and integration failure modes, translating engineering observations into clear written feedback for the research team. • Prototype quickly against shifting requirements, delivering working increments with limited up-front specification. • Collaborate with the engineering manager and other engineers to maintain consistency in code quality, architecture, and technical documentation. Qualifications Must-Have • 3+ years of dedicated professional experience building and shipping production software at a recognized, top-tier organization. • Production experience in at least one of Python, Java, Rust, C#, or C++, plus working proficiency in a second language. • Hands-on experience across the stack: backend services and APIs, a modern front-end framework (React or equivalent), relational or document databases, and cloud deployment. • Demonstrated ability to onboard onto an unfamiliar codebase and deliver working code quickly with minimal ramp-up. • Ability to engage reliably for at least 40 hours/week during weekdays. • Strong written communication skills and the ability to explain complex technical decisions clearly. Compensation & Legal • W-2 employment with Cincinnatus LLC. • Paid weekly via Stripe Connect. Application Process (Takes 20–30 mins to complete) • Upload resume • AI interview based on your resume • Submit form Resources & Support • For details about the interview process and platform information, please check: https://talent.docs.mercor.com/welcome • For any help or support, reach out to: support@mercor.com PS: Our team reviews applications daily. Please complete your AI interview and application steps to be considered for this opportunity.

Build and ship full-stack applications integrating model APIs and collaborate on code quality and documentation. | 3+ years professional software development with production experience in Python, Java, Rust, C#, or C++, plus strong written communication and ability to quickly onboard unfamiliar codebases. | About The Job Mercor connects elite creative and technical talent with leading AI research labs. Headquartered in San Francisco, our investors include Benchmark, General Catalyst, Peter Thiel, Adam D'Angelo, Larry Summers, and Jack Dorsey. Position: Software Engineer, Full Stack (Python, Java, Rust, C#, C++) Type: Contract Compensation: $50–$65/hour Location: Remote Commitment: 40 hours/week Role Responsibilities • Build and ship full-stack applications, services, and internal tools using Python, Java, Rust, C#, C++, or TypeScript to exercise frontier model capabilities end to end. • Integrate pre-release model APIs into working software, including tool interfaces, evaluation harnesses, and telemetry. • Diagnose and document model and integration failure modes, translating engineering observations into clear written feedback for the research team. • Prototype quickly against shifting requirements, delivering working increments with limited up-front specification. • Collaborate with the engineering manager and other engineers to maintain consistency in code quality, architecture, and technical documentation. Qualifications Must-Have • 3+ years of dedicated professional experience building and shipping production software at a recognized, top-tier organization. • Production experience in at least one of Python, Java, Rust, C#, or C++, plus working proficiency in a second language. • Hands-on experience across the stack: backend services and APIs, a modern front-end framework (React or equivalent), relational or document databases, and cloud deployment. • Demonstrated ability to onboard onto an unfamiliar codebase and deliver working code quickly with minimal ramp-up. • Ability to engage reliably for at least 40 hours/week during weekdays. • Strong written communication skills and the ability to explain complex technical decisions clearly. Compensation & Legal • W-2 employment with Cincinnatus LLC. • Paid weekly via Stripe Connect. Application Process (Takes 20–30 mins to complete) • Upload resume • AI interview based on your resume • Submit form Resources & Support • For details about the interview process and platform information, please check: https://talent.docs.mercor.com/welcome • For any help or support, reach out to: support@mercor.com PS: Our team reviews applications daily. Please complete your AI interview and application steps to be considered for this opportunity.

Build and ship full-stack applications and services integrating model APIs, diagnose failures, and collaborate on code quality and documentation. | 3+ years professional production software experience with multiple languages, full-stack proficiency, quick onboarding ability, and strong written communication. | About The Job Mercor connects elite creative and technical talent with leading AI research labs. Headquartered in San Francisco, our investors include Benchmark, General Catalyst, Peter Thiel, Adam D'Angelo, Larry Summers, and Jack Dorsey. Position: Software Engineer, Full Stack (Python, Java, Rust, C#, C++) Type: Contract Compensation: $50–$65/hour Location: Remote Commitment: 40 hours/week Role Responsibilities • Build and ship full-stack applications, services, and internal tools using Python, Java, Rust, C#, C++, or TypeScript to exercise frontier model capabilities end to end. • Integrate pre-release model APIs into working software, including tool interfaces, evaluation harnesses, and telemetry. • Diagnose and document model and integration failure modes, translating engineering observations into clear written feedback for the research team. • Prototype quickly against shifting requirements, delivering working increments with limited up-front specification. • Collaborate with the engineering manager and other engineers to maintain consistency in code quality, architecture, and technical documentation. Qualifications Must-Have • 3+ years of dedicated professional experience building and shipping production software at a recognized, top-tier organization. • Production experience in at least one of Python, Java, Rust, C#, or C++, plus working proficiency in a second language. • Hands-on experience across the stack: backend services and APIs, a modern front-end framework (React or equivalent), relational or document databases, and cloud deployment. • Demonstrated ability to onboard onto an unfamiliar codebase and deliver working code quickly with minimal ramp-up. • Ability to engage reliably for at least 40 hours/week during weekdays. • Strong written communication skills and the ability to explain complex technical decisions clearly. Compensation & Legal • W-2 employment with Cincinnatus LLC. • Paid weekly via Stripe Connect. Application Process (Takes 20–30 mins to complete) • Upload resume • AI interview based on your resume • Submit form Resources & Support • For details about the interview process and platform information, please check: https://talent.docs.mercor.com/welcome • For any help or support, reach out to: support@mercor.com PS: Our team reviews applications daily. Please complete your AI interview and application steps to be considered for this opportunity.