Cincinnatus is an enterprise staffing company that partners with leading technology companies to source and employ highly skilled professionals for full-time and long-term contingent roles. Cincinnatus serves as the employer of record for these engagements, providing W-2 employment, payroll, benefits, and compliance, while placing employees directly within client teams to work on high-impact initiatives. Roles hired through Cincinnatus are not project-based or freelance engagements. They are structured, role-based positions that typically involve full-time or fixed-term commitments, close collaboration with a client's internal teams, and integration into standard enterprise workflows. Cincinnatus is a legal entity separate from Mercor. While opportunities may be discovered through Mercor's platform, employment, onboarding, payroll, and benefits for these roles are administered by Cincinnatus. Equal Employment Opportunity Cincinnatus is proud to be an Equal Employment Opportunity employer. We do not discriminate based upon race, religion, color, national origin, sex (including pregnancy, childbirth, reproductive health decisions, or related medical conditions), sexual orientation, gender identity, gender expression, age, status as a protected veteran, status as an individual with a disability, genetic information, political views or activity, or any other legally protected characteristic. Cincinnatus is committed to providing reasonable accommodations for qualified individuals with disabilities and disabled veterans throughout the job application process.
Frontend Developer
Location
Worldwide
Posted
1 day ago
Salary
$85 / hour
Seniority
Mid Level
Job Description
Frontend Developer
Mercor
Role Description As a Frontend Engineer (Coding Agent Experience), you will: - Use frontier AI coding agents to complete and evaluate complex engineering tasks. - Review model-generated frontend code for correctness, quality, maintainability, accessibility, and performance. - Identify bugs, edge cases, and failure modes in model outputs. - Compare outputs from multiple frontier models and assess their strengths and weaknesses. - Apply professional engineering judgment to realistic frontend engineering scenarios. Qualifications - 2+ years of professional frontend engineering experience. - Experience building modern web applications using React, TypeScript, JavaScript, or similar technologies. - Regular use of AI coding agents such as Cursor, Claude Code, Codex, Windsurf, Gemini CLI, or similar tools. - Ability to evaluate model-generated frontend implementations, UI architecture, and performance optimizations. Requirements - Experience working on large-scale consumer or enterprise applications. Benefits - $400 per accepted task. - Compensation tied to accepted work. Application Process - Upload resume. - AI interview based on your resume. - Submit form. Resources & Support - For details about the interview process and platform information, please check: Interview Process . - For any help or support, reach out to: support@mercor.com .
Related Guides
Related Job Pages
More Frontend Engineer Jobs
Full Stack Engineer – Node/React
ICFWe are not a typical consulting firm and our people are not typical consultants.
• Design and build microservices and serverless applications in the cloud • Implement web application changes and/or build new web applications using the React framework • Work with Product Owner and UX design to understand and create solutions for diverse user requirements • Work with Architects and other Engineers to help create and then implement development best practices • Work with test engineering team to assure product quality • Collaborate in a fast-paced Agile environment • Participate in team code reviews and design reviews • Help our support team triage bugs and troubleshoot production issues • Cooperating with the back-end developers in the process of building the applications • Work independently to design, develop, and document solutions, while adhering to all applicable standards (e.g., architectural, coding, security) • Work with DevOps engineers on CI, CD, and IaC • Read specs and translate them into test designs and test automation • Perform code reviews and develop processes for improving code quality
• Own high quality end-to-end delivery of major consumer-facing features—from technical design through launch, experimentation, and iteration. • Drive frontend architecture decisions: component design, state management, data-fetching patterns, and performance budgets. • Build and optimize conversion-critical flows (event discovery, seat selection, checkout) with a relentless focus on speed, reliability, and UX quality. • Design, instrument, and interpret A/B experiments in partnership with Product and Data; use results to validate and sharpen product decisions. • Instrument frontend observability—error tracking, performance monitoring, real-user metrics—and act on what you find. • Contribute to design-system components and front-end standards that accelerate the whole team. • Mentor junior and mid-level engineers through code review, pairing, and technical leadership on shared initiatives. • Collaborate with mobile, backend, and platform teams to deliver cohesive cross-platform experiences.
Web Developer
Power Digital MarketingWe’re a leading, privately held growth marketing firm helping brands ignite revenue and brand recognition.
• Build, customize, and maintain WordPress websites including custom themes and plugins • Translate visual designs into functional, responsive, cross-browser experiences using HTML, CSS, SASS, JavaScript, and PHP • Integrate external APIs into new and existing websites • Test and debug websites to ensure performance, security, and accessibility standards are met • Implement SEO best practices at the technical level to support organic performance • Utilize and leverage Power Digital's Nova ecosystem as it relates to your department
Web Developer
Power Digital MarketingWe’re a leading, privately held growth marketing firm helping brands ignite revenue and brand recognition.
• Build, customize, and maintain WordPress websites including custom themes and plugins • Translate visual designs into functional, responsive, cross-browser experiences using HTML, CSS, SASS, JavaScript, and PHP • Integrate external APIs into new and existing websites • Test and debug websites to ensure performance, security, and accessibility standards are met • Implement SEO best practices at the technical level to support organic performance • Utilize and leverage Power Digital's Nova ecosystem as it relates to your department
