Locations

• Bulgaria
• Georgia
• Lithuania
• Moldova
• Poland
• Romania

Company Background

Our client is a global technology company transforming the advertising landscape by enabling advertisers, agencies, publishers, and broadcasters to leverage advanced data and modern TV technologies. Their unified technology stack includes a demand-side platform, a supply-side platform, and a robust data platform that supports scalable advertising solutions. With an international presence and a culture of flexibility and innovation, they are building a world-class engineering organization.

Project Description

The project is high-load Ad Server platform with a large number of users that helps selecting and delivering auction-based ads in real time. The goal is to migrate from a monolithic PHP architecture to Nest.js microservices and enhance functionality with new features. The migration has just started, offering the opportunity to influence architectural decisions and work on a challenging, performance-critical system. The team includes 2 BE engineers focused on the ad server and 1 BE and 1 Full Stack engineer working with the UI.

Technologies

• PHP 7.4
• Laravel
• Eloquent ORM
• Node.js/Nest.js
• MySQL
• Redis
• RESTful APIs
• Docker/Kubernetes deployment
• AWS ECS
• Nginx
• CI/CD

What You'll Do

• Navigate and refactor a tightly-coupled codebase where UI components are generically driven by backend entity types;
• Break down high cohesion between frontend and backend to enable independent evolution;
• Identify and eliminate architectural bottlenecks blocking new product requirements;
• Modernize patterns where the generic framework creates unnecessary complexity;
• Balance maintaining existing abstractions vs. introducing pragmatic solutions;
• Design and implement new API endpoints in Laravel and Nest.js;
• Manage API versioning and backward compatibility;
• Work with complex query filter system and entity relationships;

Job Requirements

• 5+ years of experience in PHP and Laravel development;
• Experience working with microservices architecture;
• Experience working with SQL databases;
• Strong experience maintaining, refactoring, and improving complex, tightly coupled systems;
• Proven track record of decomposing monolithic applications into modular, scalable components;
• Solid understanding of dependency injection, service-oriented architecture, and interceptor patterns;
• Knowledge of English - from B2;

Nice to Have

• Experience with Nest.js or similar Node.js frameworks;
• AdTech domain knowledge (DSP, SSP, programmatic advertising);
• Hands-on experience modernizing legacy systems or performing large-scale migrations;
• Strong understanding of design patterns: Factory, Strategy, Observer, Repository;

What Do We Offer

The global benefits package includes:

• Technical and non-technical training for professional and personal growth;
• Internal conferences and meetups to learn from industry experts;
• Support and mentorship from an experienced employee to help you professional grow and development;
• Internal startup incubator;
• Health insurance;
• English courses;
• Sports activities to promote a healthy lifestyle;
• Flexible work options, including remote and hybrid opportunities;
• Referral program for bringing in new talent;
• Work anniversary program and additional vacation days.