Note: The job is a remote job and is open to candidates in USA. The COOL company is a global leader in AI-powered advertising technology, helping brands, agencies, and publishers simplify advertising and amplify performance. They are looking for a Mid-Senior Full-Stack Engineer to build and maintain web applications for their advertising platform, working across frontend and backend technologies.
Responsibilities
- Design and implement full-stack features across React (TypeScript, Tailwind CSS, Vite) and Spring Boot (Java 17, PostgreSQL) codebases
- Build and maintain RESTful APIs with proper authentication, authorization (role-based access control), and input validation
- Design and evolve PostgreSQL database schemas using Flyway migrations, including JSONB modeling for flexible domain objects
- Develop responsive, accessible UI components following existing design patterns and component libraries
- Integrate with third-party advertising platform APIs (Google Ads, Meta Marketing API, Adform) for account management and data synchronization
- Implement and maintain OAuth flows for external platform connections
- Build complex business logic including billing calculations, invoice generation, and payment processing workflows
- Write efficient database queries and optimize application performance for large datasets
- Collaborate with the data engineering team on Snowflake integrations for analytics and reporting features
- Participate in code reviews, providing constructive feedback and maintaining code quality standards
- Troubleshoot production issues across the full stack using AWS CloudWatch logs and application monitoring
- Contribute to CI/CD pipeline maintenance and deployment processes
Skills
- 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 (16+) with TypeScript, including hooks, state management, and modern component patterns
- Solid experience with PostgreSQL including schema design, query optimization, indexing strategies, and migrations
- Experience integrating with third-party REST APIs and OAuth 2.0 authentication flows
- Understanding of Git workflows, pull request processes, and collaborative development practices
- Ability to independently own features from technical design through deployment
- Strong debugging skills across frontend and backend, including browser DevTools and server-side logging
- Must be able to work primarily between the hours of 9:30 AM - 6:30 PM ET
- Must have a player/coach mentality, willing to both execute and lead
- Ability to juggle multiple projects concurrently and set and meet deadlines
- Skilled at receiving and providing direct feedback
- Collaborative mindset and great teamwork skills
- Entrepreneurial & adaptable; great learning skills
- Curious, research-minded, data-informed
- Able to search for possible solutions and apply them
- Creative confidence
- Proactive communicator
- A sense of humor and a love of online culture
- Thrives in a start-up culture
- Experience with CSS frameworks (Tailwind CSS preferred)
- Familiarity with cloud services, particularly AWS (S3, SES, Lambda, ECS, CloudWatch)
Company Overview