Principal Software Engineer
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Job Description
C++ engineer modernizing Ticketmaster's high-throughput payment processing systems handling real financial transactions. Driving platform migrations and developing robust payment integrations with third-party gateways.
Responsibilities:
- Maintain and strategically modernize high-throughput payment processing systems handling real financial transactions in real time
- Drive platform migration work, including migrating a core Windows C++ authorization gateway to Linux via Clang and Bazel
- Develop robust payment integrations with third-party gateways (Chase Paymentech, Barclays, HSBC, AMEX, Adyen, Braintree, Klarna, Shift4, and others)
- Decompose legacy IPC frameworks into gRPC services, enabling payment components to be reused across the broader payments ecosystem
- Implement security-critical features involving encryption, PCI compliance, and sensitive payment data handling
- Optimize performance of transaction processing pipelines where latency directly affects whether a customer completes a purchase
- Incrementally steer legacy codebases toward modern C++ practices (RAII, ownership semantics, safe string handling) without breaking the payment flows that depend on them
- Design and implement comprehensive testing including unit tests, integration tests, and fuzz testing for security-critical components
- Debug and resolve production issues in systems with complex interdependencies and real operational takes
- Collaborate with payment operations teams to onboard new payment methods and gateway providers
- Ensure compliance with PCI-DSS and other financial industry standards
- Participate in on-call rotation for production payment system support
Requirements:
- 7+ years of professional C++ development experience in production environments
- Modern C++ fluency
- Strong understanding of systems programming, including memory management, concurrency, and performance optimization
- Ability to reason about undefined behavior, and its practical consequences across platforms
- Systematic debugging methodology
- Toolchain understanding and cross-compilation concerns
- Proficiency with build systems — Bazel experience highly valued;
- Experience working with legacy codebases older than 10 years — ability to understand, respect, and incrementally modernize existing systems
- Experience with or strong interest in payment processing or financial transaction systems
- Deep knowledge of security best practices
- Proficiency with AI-assisted development tools (e.g., Claude, Codex) with mature judgment
- Understanding of HTTP/HTTPS protocols and RESTful API design
- Experience with Linux/Unix environments
- Rust experience or genuine interest in learning it
- gRPC experience or familiarity with service decomposition from monolithic architectures
- Payment gateway integration experience (Chase Paymentech, Braintree, Adyen, or similar)
- PCI-DSS compliance knowledge and implementation experience
- Experience with platform migrations (e.g., Windows to Linux, MSVC to Clang)
- Bazel build system expertise
- Performance profiling experience
- Experience with shared memory, IPC frameworks, or low-level concurrency primitives
- Kafka or other event streaming platforms experience
- OpenSSL/cryptographic libraries hands-on experience
- Familiarity with AI-powered code review and static analysis tools
- Awareness of security considerations when using AI tools with legacy or under-documented systems
Benefits:
- Medical, vision, dental and mental health benefits for you and your family, with access to a health care concierge, and Flexible or Health Savings Accounts (FSA or HSA)
- Free concert tickets, generous paid time off including paid holidays, sick time, and personal days
- 401(k) program with company match, stock reimbursement program
- New parent programs including caregiver leave, plus fertility, adoption, foster, or surrogacy support
- Career and skill development programs with School of Live, tuition reimbursement, and student loan repayment
- Volunteer time off, crowdfunding match
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