Senior Backend Developer (PHP)

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Requirements:

• Understanding of best practices for optimizing code and web products in PHP, working with caching, asynchrony. Knowledge of best practices for developing and supporting large-scale projects.
• Deep understanding of OOP
• Deep understanding of Symfony. Proficient in designing and implementing RESTful APIs using Symfony. Proficient in Doctrine ORM.
• Relational Database Management (Postgresql). Proficiency in optimizing complex SQL queries for performance using techniques such as query rewriting, indexing strategies, and query execution plans.
• Proficient in designing database schemas, including normalization techniques, entity-relationship modeling, and schema design best practices.
• Understanding the inner workings of Kubernetes, Docker and its components such as Docker Engine, Docker Hub, Docker Swarm. Knowledge of the process of monitoring and logging containers in Docker to identify problems and analyze their causes.
• Experience integrating Docker with other services and tools to automate CI/CD processes, for example, Jenkins, GitLab CI.
• Understanding of more detailed aspects of CI/CD, such as pipeline configuration, automation of various stages of development and deployment.
• Deep SOLID, GRASP understanding. Deep understanding of a broad range of design patterns, including their motivations, structures, and implementations.
• Knowledge of advanced DDD concepts such as Domain Events, Domain Services, Bounded Contexts. Ability to design a domain model for complex business problems and use it to solve real problems. Understanding the importance of application context and developing Bounded Contexts to separate domain models.
• Advanced understanding of SQRS principles and benefits, including asynchronous command processing, data synchronization between read and write models. Experience using design patterns and architectural patterns to implement an effective SQRS-based architecture.
• Advanced knowledge of professional architecture design practices. Experience designing and developing complex, large systems using architectural templates and patterns. Ability to define and document architectural solutions and solve problems related to system complexity and scalability.
• Advanced knowledge of PHP integration test automation tools and libraries such as PHPUnit, Codeception, Behat. Ability to design and structure integration tests for large and complex systems with a large number of interacting components. Knowledge of the process of setting up test environments and managing dependencies for effective integration tests.
• Advanced knowledge of the process of development and deployment of systems built on the basis of Event Sourcing. Ability to design the architecture of the application using Event Sourcing, taking into account the requirements for the required capacity and scalability.
• Advanced knowledge of microservices design and deployment processes, including configuration management, monitoring, and logging.
• Advanced knowledge of Jenkins functionality, including advanced configuration capabilities such as parameterization, plugins, additional tools.
• Full SDLC cycle
• Advanced knowledge of Agile Development Methodology and its SCRUM and KANBAN frameworks

Responsibilities:

• Designing, developing, testing, documenting, releasing and supporting software from scratch.
• Enhancing and refining our existing API and backend systems.
• Integrating third-party solutions to broaden our payment ecosystem (acquirer, gateway, alternative payment methods, token platforms, systems for verification/scoring/monitoring of customer operations, reporting, etc.).
• Running tests to make sure everything works as it should and setting up a testing environment for checking new features.
• Fixing existing bugs and debugging the developed software.
• Preparing necessary technical documentation.
• Provide support for the implemented software in production
• Collaborating with the front-end developers and other team members to complete all of the above tasks in the most efficient way.