Role: Javascript/React Frontend Engineer with strong REST API + Java, .NET or Node.js
Location: NYC, NY (Hybrid - 3 days a week in office is must)
Job Type: W2 Contract
Experience Level: Senior
Must-have:
JavaScript with React + strong Rest API experience with either Java, .Net or Node.js so needs to be fullstack.
Job Description:
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Frontend-Focused Full-Stack Engineer (React + JavaScript) with strong Rest API experience with either Java, .Net or Node.js.
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We are looking for Frontend-Focused Full-Stack Engineers to help enhance and scale a growing AdTech platform centered on digital advertising capabilities.
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This role emphasizes modern frontend development with React and JavaScript, while contributing to backend integrations through REST APIs across multiple technologies (Java, .NET, Node.js).
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You will play a key role in delivering high-performance user experiences for advertising platforms, including campaign management, targeting, measurement, and integrations across media and publishing ecosystems.
Key Responsibilities:
Frontend (Primary Focus)
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Design and build modern, scalable frontend applications using React and JavaScript (TypeScript preferred).
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Develop intuitive UI/UX for key AdTech capabilities, including:
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Campaign management dashboards
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Targeting and personalization interfaces
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Reporting and analytics views
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Optimize frontend performance, responsiveness, and usability.
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Collaborate closely with Product, Marketing, and Design teams to deliver high-quality user-facing features.
Backend & API Collaboration (Secondary Focus)
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Integrate frontend applications with REST APIs built in Java, .NET, or Node.js.
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Contribute to API design discussions to ensure efficient frontend-backend interaction.
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Support development and maintenance of backend services where needed, focusing on:
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API contracts
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Data flow optimization
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Service integration
Platform & Engineering Contribution
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Help scale and enhance an existing AdTech MVP platform to enterprise-grade solutions.
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Participate in system design discussions, code reviews, and technical planning.
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Work with cloud-based and distributed systems.
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Support CI/CD processes, deployment pipelines, and platform reliability.
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Contribute to integrations with advertising platforms such as Google Ad Manager, Koddi, and similar ecosystems.
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Assist in troubleshooting production issues and improving performance and stability.
Required Qualifications:
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JavaScript (ES6+)
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React (including hooks, state management, component architecture)
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Experience building complex, data-driven UI applications.
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Experience working with:
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REST APIs (integration and/or design)
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Modern frontend tooling (e.g., Webpack, Vite, CI/CD pipelines)
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Experience with cloud-based applications and services.
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Familiarity with Agile development environments.
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Understanding of CI/CD, DevOps practices, and application resiliency.
