Sierra

1 month ago

Software Engineer, Payments Infrastructure

✓ Verified Job

Canonical indexed version, validated from employer's careers page.

Source: Company careers pageValidated by: Fursa AI

Last checked: 2 hours agoStatus: Live

Job Summary

A Software Engineer building the secure Payments Infrastructure that sits between live conversations and payment endpoints. You will own tokenization, per-token encryption, and the security perimeter for cardholder data, enabling PCI DSS Level 1 compliant payments across multiple channels and platforms while collaborating with teams across LLM, payments, and infrastructure domains.

Location: San Francisco

Workplace: Onsite

Employment Type: Full time

Job Function: Software Engineering

Key Responsibilities

•Design the secure-capture protocol every channel sits behind, so the payment feels like one continuous conversation to the person on the other end, while telephony providers, contact-center platforms, embedded chat, and Sierra's own voice stack all present a single event lifecycle to agent code, no matter how different each customer's stack is.
•Build and extend the tokenization platform: per-token envelope encryption with a unique data key per token, so a single compromised decrypt exposes one token at most.
•Own the security perimeter around the cardholder-data environment, so what each system can reach is enforced by infrastructure rather than convention, and auditable by design.
•Build deterministic, auditable detection in the agent's hot path that catches the cardholder data general-purpose models miss, and help design the purpose-built detection model that comes next. No LLM, including any we build ourselves, ever sees plaintext cardholder data.
•Make payments something other engineers can use without becoming compliance experts: drive the platform toward processor-agnostic charging, self-serve onboarding, and single-tenant deployments, so a team can add payments to an agent without a payments infrastructure engineer in the loop.

Pay and Benefits

Salary: USD 230,000 - 390,000 annually

Equity and Bonus:Equity

Perks:Paid LeaveMedical BenefitsVision BenefitsRetirementParential? NoParental LeaveLife InsuranceEquity Plans

Key Requirements

•7+ years building backend, platform, or infrastructure systems with a track record of shipping and operating high-reliability services in production at a strong engineering organization
•A deep security instinct and ability to design for worst-case scenarios
•Fluency in a systems language (Go) and comfort owning distributed systems end to end
•A track record of setting technical direction on ambiguous, high-stakes problems
•Degree in Computer Science or a related field, or equivalent professional experience

Experience:7+ yearsPaymentsEnterprise software

Education:Bachelor's

Skills:GoDistributed systemsSecurityTokenizationPCI DSSCardholder dataEncryption

Tech Stack:GoEncryptionPCI DSSTokenizationSecurityDistributed systems

Company Brief

Sierra

Develops advanced AI agents and tools focused on building autonomous, generalist machine learning systems to assist developers and enterprises in automating complex workflows, decision-making, and application-level tasks.

Industry: AI & Machine Learning

Website

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Sierra

1 month ago

Software Engineer, Payments Infrastructure

✓ Verified Job

Canonical indexed version, validated from employer's careers page.

Source: Company careers pageValidated by: Fursa AI

Last checked: 2 hours agoStatus: Live

Job Summary

Location: San Francisco

Workplace: Onsite

Employment Type: Full time

Job Function: Software Engineering

Key Responsibilities

•Design the secure-capture protocol every channel sits behind, so the payment feels like one continuous conversation to the person on the other end, while telephony providers, contact-center platforms, embedded chat, and Sierra's own voice stack all present a single event lifecycle to agent code, no matter how different each customer's stack is.
•Build and extend the tokenization platform: per-token envelope encryption with a unique data key per token, so a single compromised decrypt exposes one token at most.
•Own the security perimeter around the cardholder-data environment, so what each system can reach is enforced by infrastructure rather than convention, and auditable by design.
•Build deterministic, auditable detection in the agent's hot path that catches the cardholder data general-purpose models miss, and help design the purpose-built detection model that comes next. No LLM, including any we build ourselves, ever sees plaintext cardholder data.
•Make payments something other engineers can use without becoming compliance experts: drive the platform toward processor-agnostic charging, self-serve onboarding, and single-tenant deployments, so a team can add payments to an agent without a payments infrastructure engineer in the loop.

Pay and Benefits

Salary: USD 230,000 - 390,000 annually

Equity and Bonus:Equity

Perks:Paid LeaveMedical BenefitsVision BenefitsRetirementParential? NoParental LeaveLife InsuranceEquity Plans

Key Requirements

•7+ years building backend, platform, or infrastructure systems with a track record of shipping and operating high-reliability services in production at a strong engineering organization
•A deep security instinct and ability to design for worst-case scenarios
•Fluency in a systems language (Go) and comfort owning distributed systems end to end
•A track record of setting technical direction on ambiguous, high-stakes problems
•Degree in Computer Science or a related field, or equivalent professional experience

Experience:7+ yearsPaymentsEnterprise software

Education:Bachelor's

Skills:GoDistributed systemsSecurityTokenizationPCI DSSCardholder dataEncryption

Tech Stack:GoEncryptionPCI DSSTokenizationSecurityDistributed systems

Company Brief

Sierra

Industry: AI & Machine Learning

Website