JavaScript/React Frontend Engineer with strong REST API + Java, .NET or Node.js - Only W2

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.

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.

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

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.

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

Node.js

Experience with
cloud-based applications and services.

Familiarity with Agile development environments.

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