Senior Full-Stack Engineer for AI Ad Tech Platform

The Cool Company; United States; On-site; USD 120,000 - 160,000; Full time

Job summary

The COOL company is seeking a Mid-Senior Full-Stack Engineer to join the Product Engineering team, reporting to the Engineering Manager. This role is responsible for building and maintaining the web applications that power our advertising platform, including the Cool AI campaign management system, billing and invoicing module, and advertiser-facing dashboards.

The Full-Stack Engineer will work across our frontend (React/TypeScript) and backend (Java/Spring Boot) stack, delivering features

Qualifications

• 4-6 years of professional software engineering experience in full-stack web development.
• Strong proficiency in Java (11+) and Spring Boot, including Spring Security, Spring Data JPA, and RESTful API design.
• Strong proficiency in React (TypeScript) with hooks, state management, and modern components.
• Solid experience with PostgreSQL including schema design, query optimization, indexing, and migrations.
• Experience with CSS frameworks (Tailwind CSS) and building responsive layouts.
• Familiarity with AWS services (S3, Lambda, CloudWatch) and cloud deployments.

Responsibilities

• Design and implement full-stack features across React/TypeScript, Tailwind, Vite and Spring Boot with PostgreSQL.
• Build and maintain RESTful APIs with authentication and authorization (RBAC).
• Design and evolve PostgreSQL schemas using Flyway migrations and JSONB modeling.
• Develop responsive, accessible UI components following design systems.
• Integrate with Google Ads, Meta Marketing API, and Adform for account management and data sync.
• Implement OAuth flows for external platform connections.

Skills

Java (11+)

Spring Boot

React + TypeScript

RESTful APIs

PostgreSQL

AWS

OAuth 2.0

CI/CD

Tools

Spring Security

Flyway

JSONB Modeling

Vite

Tailwind CSS

Snowflake

OAuth 2.0

Job description

The COOL company is seeking a Mid-Senior Full-Stack Engineer to join the Product Engineering team, reporting to the Engineering Manager. This role is responsible for building and maintaining the web applications that power our advertising platform, including the Cool AI campaign management system, billing and invoicing module, and advertiser-facing dashboards.

The Full-Stack Engineer will work across our frontend (React/TypeScript) and backend (Java/Spring Boot) stack, delivering features