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Software Engineer, Payments Infrastructure

San Francisco, CA💼 Full-time🗓 2026-06-02 → 2026-09-26

Core

Designing secure-capture protocols and building a tokenization platform to create a trust boundary between live conversations and payment systems, ensuring no plaintext cardholder data is exposed to agents or LLMs.

Role type

Senior IC backend infrastructure engineer (payments security)

Builds

Secure payment infrastructure, tokenization platform, and detection systems for enterprise AI agents

Domain

Fintech, AI, Cloud Infrastructure, Cybersecurity

Deliverable

production ML models | product features | infrastructure

Required skills

Backend system design, distributed systems architecture, applied cryptography, key management, security perimeter design, protocol design, Go programming

Preferred skills

Experience in regulated domains (PCI, healthcare), real-time media pipelines, building internal developer platforms (SDKs, self-serve)

Technologies

Go, PCI DSS compliant systems, Visa Global Registry

Responsibilities

Design secure-capture protocols for multi-channel payment integration, build and extend the tokenization platform with envelope encryption, own the security perimeter for cardholder data environments, build deterministic detection for cardholder data in the agent's hot path, drive platform abstraction for processor-agnostic charging and self-serve onboarding, set technical direction for the team

Seniority

Senior, hands-on IC

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