Front-end Developer

5 days ago

ClujNapoca, Cluj, Romania Sigma Software Full time 30,000 - 60,000 per year
Company Description

We are looking for a passionate Front-end Developer to join our team. This is a unique opportunity to build a platform that will power the global digital advertising industry. Your work will shape how people discover content and products around the world.

Сustomer

Our Customer is a Swedish AdTech company that is transforming how publishers and advertisers interact. They provide state-of-the-art self-serve advertising platforms that enable seamless, direct transactions between advertisers and some of the world's largest publishers. Their mission is to make advertising more accessible, automated, and efficient through innovative technology. Together, we serve globally recognized clients such as TripAdvisor, Bloomberg, The Washington Post, Opera, Dow Jones, etc. 

Project

We are building a white-label self-serve advertising platform widely used by international media companies and publishers.

The platform integrates with ad servers (e.g., Google DoubleClick/DFP), CRMs, and payment systems (Adyen, Stripe) to provide a unified interface for managing advertising campaigns.

Job Description
  • Develop modern Front-end components using and TypeScript
  • Build a responsive, high-performance UI for large-scale AdTech systems
  • Collaborate with designers, Back-end engineers, and Data teams
  • Work on features that support campaign forecasting, targeting, and analytics
  • Participate in Agile ceremonies, code reviews, and planning
Qualifications
  • 4+ years of Front-end development experience
  • Strong experience with , TypeScript, and ES6+
  • Solid skills in HTML5, CSS3, SASS, and responsive design
  • Experience with REST and GraphQL APIs
  • Understanding of performance optimization and scalable UI patterns
  • Upper-Intermediate or higher level of English  

Would be a plus:

  • Experience with testing frameworks (Jest, Cypress)
  • Knowledge of CI/CD tools (GitLab, Jenkins) and Docker
  • Background in AdTech or other high-load domains

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