JavaScriptReact Frontend Engineer with strong REST API + Java, .NET or Only W2

Saransh Inc

Job Location:

New York City, NY - USA

Monthly Salary: Not Disclosed

Posted on: 2 days ago

Vacancies: 1 Vacancy

Job Summary

Role: Javascript/React Frontend Engineer with strong REST API or

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 or so needs to be fullstack.

Job Description:

Frontend-Focused Full-Stack Engineer (React JavaScript) with strong Rest API experience with either or .
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 ( ).
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 or .
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:

6 8 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

Experience with cloud-based applications and services.
Familiarity with Agile development environments.
Understanding of CI/CD DevOps practices and application resiliency.

Role: Javascript/React Frontend Engineer with strong REST API or 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 or so needs to be fullstack. Job Descri...