Senior PHP Engineer, Remarketing (f/m/x)

Company Description

AUTO1 Group is a multi-brand technology company building the best way to buy, sell and finance cars. Our established platforms offer a quick and easy way for consumers and professional car dealers across Continental Europe to buy and sell used cars at haggle-free and best prices. We provide the largest selection of used cars in over 30 countries and offer fully digital and easy financing solutions to merchants and consumers.

We are seeking a technically skilled Senior PHP Engineer located in Poland to join our dynamic Remarketing Technology team.. The scope of AUTO1’s remarketing business includes vehicle sourcing, inspection and resale to dealerships through digital platforms.AUTO1 Group is Europe's leading digital automotive platform. We revolutionize the used car market with our well-known brands Autohero, wirkaufendeinauto.de, and AUTO1.com.

Our Offer

• Colleagues who strive for excellence while using the latest technologies. See what we do in our Tech-Blog: https://auto1.tech

• Team and company events like Hackathons, International Nights, Company Party, Football and more

• You will work with some of the most talent engineers in the city, and have the chance to learn and exchange experiences with our In-house training courses

• Are you already located in the EU and looking for a remote position? If we have an entity where you are, you are good to go

Job Description

Your new role

• To design, develop, test, deploy, monitor, and maintain 30+services and applications 

• Use your hands-on experience, and “can-do” attitude to solve complex problems

• Raise the bar and drive technological innovations to keep AUTO1 at the cutting-edge

• Inspire those around you to push boundaries and excel 

• Collaborate with various engineering and product teams to ensure our high business standards, and take the chance to get involved with other technologies and other fields of software development.

Qualifications

1. Core PHP & Ecosystem Mastery (Must Have)

• Modern PHP Proficiency: Deep expertise in PHP 8.2+, utilizing modern features such as Attributes, Enums, Readonly classes, Fibers, and strict typing.

• Framework Expertise: Advanced architectural experience with major frameworks like Symfony or Laravel, understanding the internal kernel, request lifecycle, and dependency injection.

• Standardization (PSR Mastery): Practical understanding of PHP-FIG (PSR) standards beyond just code style (PSR-12). Ability to leverage interfaces for Autoloading (PSR-4), Caching (PSR-6/16), and HTTP Messages (PSR-7) to write framework-agnostic code that plays well with the broader ecosystem.

• Testing Culture: Strong command of testing strategies (Unit, Integration) using PHPUnit or Pest, with a focus on writing testable code.

2. Software Architecture & Design Principles (Must Have)

• Design Patterns: Practical application of GoF design patterns (Factory, Strategy, Observer) to solve business problems cleanly.

• Architectural Clarity: Experience implementing decoupled architectures such as Hexagonal Architecture (Ports & Adapters) or Domain-Driven Design (DDD) principles.

• Ambassador of Modular Architecture: Acts as a champion for SOLID principles and Clean Architecture, aggressively advocating for loose coupling and high cohesion. You don't just write code; you design systems that resist entropy, ensuring that every class and module has a distinct responsibility and is easily extensible without side effects.

• Readability over Micro-Optimization: A strong preference for writing clean, expressive, and maintainable code. You understand that "premature optimization is the root of all evil" and believe that clear code is easier to optimize later than optimized code is to read now. You only sacrifice readability for speed when hard profiling data demands it.

3. Infrastructure & DevOps Mindset (Working Knowledge)

• Containerization: Working knowledge of Docker; able to spin up local environments, troubleshoot containers, and understand basic Dockerfile definitions without needing to be an expert in multi-stage optimization.

• CI/CD Awareness: Familiarity with how pipelines function (e.g., GitHub Actions), able to troubleshoot basic build failures, and understand the deployment flow.

4. Data Persistence & Strategy (Critical Skill)

• RDBMS Mastery: Strong proficiency with relational databases (MySQL or PostgreSQL), including complex query optimization, indexing strategies, and schema design for data integrity (ACID).

• NoSQL P