Coherent Solutions is a digital product engineering company focused on empowering business success. Our global team of 1700+ talented professionals collaborate seamlessly to deliver innovative solutions that drive measurable business impact. Headquartered in Minneapolis, USA, the company’s core competencies across 10 locations worldwide include product software development, IT consulting, data and analytics, machine learning, mobile app development, DevOps, Salesforce, and more.

We grow a team of advisors, not just order takers, and strive to make the company a place for career growth and opportunities. If you want to grow your core competencies, share your passion and be sure that every contribution is evaluated, we are on the same page.

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;

If this opportunity excites you, send us your resume!

Please, note, that we will consider all the applications with due respect, but only shortlisted candidates will be contacted.

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