Quick Summary
About Xsolla
Xsolla is a global commerce company providing robust tools and services designed to help developers overcome challenges inherent in the video game industry. We partner with companies, from indie studios to AAA publishers, to assist them in funding, distributing, marketing, and monetizing their games.
Headquartered in Los Angeles, California, Xsolla operates as the merchant of record, having helped over 1,500+ game developers reach more players and grow their businesses worldwide. We are committed to bringing opportunities and new resources to creators, grounded in the belief in the future of video games. For more information, visit Launch, monetize, and scale with Xsolla tools and services.
About the Role
We are seeking an experienced Backend Developer to maintain and enhance our high-scale payment processing platform, specifically handling card transactions. This role involves optimizing transaction flows, ensuring system reliability, and working closely with various payment gateways.
Key Responsibilities
- Develop and maintain backend services for card payment processing utilizing PHP (Symfony) and Golang.
- Integrate and support various Payment Service Providers (PSPs) and acquirers (e.g., Adyen, Checkout.com, JP Morgan Chase).
- Design and implement scalable, event-driven architectures suitable for high-load payment systems.
- Produce clean, testable code with comprehensive unit and functional test coverage.
- Optimize database queries and data models for OLTP workloads (MySQL, MongoDB).
- Collaborate on system design, technical decisions, and code reviews within the team.
- Ensure system observability and troubleshoot issues using the ELK stack.
- Contribute to CI/CD pipeline improvements and deployment processes.
Required Qualifications
- 3+ years of backend development experience using PHP and/or Golang in production environments.
- Hands-on experience with card payment processing and PSP/acquirer integrations.
- Strong understanding of payment flows: authorization, capture, refunds, chargebacks, and reconciliation.
- Expert knowledge of OOP principles, design patterns, and clean architecture.
- Proficiency in SQL, database design, and performance optimization.
- Experience utilizing message queues (RabbitMQ, Kafka) and caching layers (Redis).
- Solid understanding of algorithms, data structures, and their practical application.
- Experience writing unit and integration tests.
Nice to Have
- Knowledge of PCI DSS compliance requirements and secure payment data handling.
- Understanding of 3D Secure (3DS) authentication protocols.
- Experience with tokenization and payment security best practices.
- Knowledge of Apple Pay and Google Pay integration principles.
- Experience with Kubernetes and Google Cloud Platform (GCP).
- Familiarity with ELK stack for monitoring and logging.
- Previous work experience with high-load, mission-critical systems.
- Frontend development experience with Angular.
Tech Stack
- Backend: PHP 8 (Symfony, Doctrine), Golang
- Databases: MySQL, MongoDB, Redis
- Infrastructure: Docker, Kubernetes, GCP, RabbitMQ, ELK
We utilize artificial intelligence (AI) tools to support parts of the hiring process, such as reviewing applications, analyzing resumes, or assessing responses. These tools assist our recruitment team but do not replace human judgment. Final hiring decisions are ultimately made by humans. If you would like more information about how your data is processed, please contact us.