Senior Software Engineer

Joining Razer will place you on a global mission to revolutionize the way the world games. As a Senior Software Engineer, you will be responsible for designing, building, and operating full-stack web-based payment systems using a .NET backend and modern frontend technologies. This role focuses on correctness, reliability, and operational ownership of money-moving workflows, including integration with external payment service providers and handling asynchronous and failure scenarios.

Key responsibilities include:

• Design, implement, and maintain end-to-end payment flows using a .NET backend and web frontends, including checkout, top-ups, subscriptions, refunds, and reversals
• Build and operate APIs and services using C#/.NET (e.g. ASP.NET Core)
• Develop and maintain frontend components using modern web frameworks (e.g. React or equivalent)
• Integrate and operate third-party payment service provider (PSP) APIs
• Collaborate with backend, frontend, and platform engineers on payment state management, idempotency, and reconciliation
• Handle asynchronous workflows including webhooks, retries, and partial failures
• Ensure systems are observable through logging, metrics, and alerting
• Participate in on-call rotations and lead investigation and resolution of payment-related production incidents
• Review designs and implementations with a focus on failure handling, data integrity, security, and operational readiness
• Apply AI-assisted development tools (e.g. code generation, testing, debugging, analysis) to improve productivity, while ensuring all money-related logic is reviewed, validated, and production-safe
• Contribute to continuous improvement of engineering standards, reliability practices, and development tooling

Minimum qualifications include:

• Bachelor's degree in Computer Science, Engineering, or equivalent practical experience
• 5+ years of professional software engineering experience
• Strong experience building full-stack web applications with .NET (C#) on the backend
• Experience developing modern web frontends (e.g. React, Angular, or similar frameworks)
• Hands-on experience integrating payment systems or financial APIs
• Solid understanding of distributed systems concepts, including idempotency, retries, and eventual consistency
• Experience diagnosing and resolving production issues in revenue-critical systems
• Experience using modern developer productivity tools, including AI-assisted coding or analysis tools, in a professional environment

Preferred qualifications include:

• Experience working with payment service providers (e.g. Stripe, Adyen, Braintree, or local PSPs)
• Familiarity with wallets, balances, or ledger-adjacent systems
• Exposure to chargebacks, refunds, disputes, or fraud workflows
• Experience operating high-availability, revenue-generating systems
• Knowledge of compliance or regulatory requirements related to payments (e.g. PCI)
• Experience with Southeast Asia payment methods (e.g. PayNow, GrabPay)