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Xsolla

Xsolla's video game business engine helps game developers and publishers operate more efficiently and sell more games.

Backend Developer

Backend EngineerSoftware EngineerFull TimeRemoteTeam 201-500Since 2005H1B SponsorCompany SiteLinkedIn

Location

California

Posted

40 days ago

Salary

Not specified

Bachelor Degree3 yrs expEnglishKafkaMongo DBMy SQLPHPRabbit MQRedisSQLSymfonyGo

Job Description

• Develop and maintain backend services for card payment processing using PHP (Symfony) and Golang. • Integrate and support payment service providers (PSPs) and acquirers (Adyen, Checkout.com, JP Morgan Chase, etc.) • Design and implement scalable, event-driven architectures for high-load payment systems • Write clean, testable code with comprehensive unit and functional test coverage • Optimize database queries and data models for OLTP workloads (MySQL, MongoDB) • Collaborate with the team on system design, code reviews, and technical decisions • Ensure system observability and troubleshoot issues using ELK stack • Participate in CI/CD pipeline improvements and deployment processes

Job Requirements

  • 3+ years of backend development experience with PHP and/or Golang in production environments
  • Hands-on experience with card payment processing and PSP/acquirer integrations
  • Understanding of payment flows: authorization, capture, refunds, chargebacks, and reconciliation
  • Strong knowledge of OOP principles, design patterns, and clean architecture
  • Proficiency in SQL, database design, and performance optimization
  • Experience with message queues (RabbitMQ, Kafka) and caching layers (Redis)
  • Solid understanding of algorithms, data structures, and their practical application
  • Experience writing unit and integration tests

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