Job Description

Role: Sr Full Stack /Front End Developer ( Javascript + React 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 Level is required - Minimum 12+ years experience is must

Must-have:

JavaScript with React + strong Rest API experience with either Java, .Net or Node.js so needs to be fullstack.

Job Description:

• Frontend-Focused Full-Stack Engineer (React + JavaScript) with strong Rest API experience with either Java, .Net or Node.js.

• We are looking for Frontend-Focused Full-Stack Engineers to help enhance and scale a growing AdTech platform centered on digital advertising capabilities.

• 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).

• 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)

• Design and build modern, scalable frontend applications using React and JavaScript (TypeScript preferred) .

• Develop intuitive UI/UX for key AdTech capabilities, including:

• Campaign management dashboards

• Targeting and personalization interfaces

• Reporting and analytics views

• Optimize frontend performance, responsiveness, and usability.

• Collaborate closely with Product, Marketing, and Design teams to deliver high-quality user-facing features.

Backend & API Collaboration (Secondary Focus)

• Integrate frontend applications with REST APIs built in Java, .NET, or Node.js .

• Contribute to API design discussions to ensure efficient frontend-backend interaction.

• Support development and maintenance of backend services where needed, focusing on:

• API contracts

• Data flow optimization

• Service integration

Platform & Engineering Contribution

• Help scale and enhance an existing AdTech MVP platform to enterprise-grade solutions.

• Participate in system design discussions, code reviews, and technical planning.

• Work with cloud-based and distributed systems.

• Support CI/CD processes, deployment pipelines, and platform reliability.

• Contribute to integrations with advertising platforms such as Google Ad Manager, Koddi, and similar ecosystems.

• Assist in troubleshooting production issues and improving performance and stability.

Required Qualifications:

• 12+ years of software engineering experience , with strong emphasis on frontend development.

• Strong expertise in:

• JavaScript (ES6+)

• React (including hooks, state management, component architecture)

• Experience building complex, data-driven UI applications .

• Experience working with:

• REST APIs (integration and/or design)

• Modern frontend tooling (e.g., Webpack, Vite, CI/CD pipelines)

• Understanding of backend systems using one or more of:

• Java

• .NET

• Node.js

• Experience with cloud-based applications and services .

• Familiarity with Agile development environments.

• Understanding of CI/CD, DevOps practices, and application resiliency.

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