Xsolla
Xsolla's video game business engine helps game developers and publishers operate more efficiently and sell more games.
Backend Developer
Location
California
Posted
30 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
