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# Senior Backend Engineer, Agentic AI

- **Company:** Airwallex US, LLC
- **Location:** San Francisco, CA, United States
- **Experience:** Expert
- **Contract:** Permanent contract
- **Skills:** Computer-Aided Design, Application Programming Interfaces (APIs), Artificial Intelligence, BigQuery, Database Design, Programming Tools, Distributed Systems, Python (Programming Language), NoSQL, Real-Time Operating Systems, Standard Sql, Web Services, Backend, Agentic-AI, Fastapi, Event Driven Architecture, AI Co-pilot, Microservices
- **Published:** October 27, 2026
- **Apply:** https://www.careerbuilder.com/job-details/senior-backend-engineer-agentic-ai-san-francisco-ca--15f3cd45-f1f1-47e9-b48c-87150a963fee

## About the Role

Artificial Intelligence (AI), Financial Operations, Artificial Intelligence (AI), Financial Systems, Realtime Operating System, Data Modeling, Application Programming Interface (API), Systems Scalability, Continuous Improvement, Machine Tool, * 5+ years of backend engineering experience with Python at scale.

 * Deep knowledge of SQL and NoSQL database design.
 * Experience with distributed systems, event-driven architectures, or microservices.
 * Familiarity with GCP services such as Pub/Sub, Cloud Run, Cloud SQL, BigQuery, and KMS.
 * Strong understanding of security and compliance best practices.
 * Experience designing and operating reliable, production-grade services.
 * A passion for building the backend systems that power intelligent products.

Preferred

 * Experience building agentic workflows, AI copilots, or AI-native products.
 * Experience with financial systems, ledgers, payments, accounting, or other high-integrity domains.
 * Experience building internal platforms, frameworks, SDKs, or developer tooling.
 * Experience partnering closely with ML and product teams to productionize research or prototypes.

You'll thrive here if

 * You're comfortable owning the roadmap yourself.
 * You're comfortable making decisions with incomplete information and moving quickly anyway.
 * You're excited by a category that hasn't been won yet, and want to be early enough to shape it.
 * You're comfortable with ambiguity. Give you a problem, not a prescription, and you'll run with it.
 * You default to action. You'd rather course-correct in motion than wait for perfect clarity.

## Description

You'll help design the backend foundations for T:0's intelligent finance systems: scalable services, resilient APIs, and thoughtful data models that support agentic workflows, AI copilots, and real-time financial infrastructure.

 * Build typed, production-grade APIs and services in Python using FastAPI and Pydantic.
 * Develop resilient infrastructure primitives, including queues, retries, idempotency, observability, and backpressure handling, so teams can ship quickly without sacrificing reliability.
 * Work at the intersection of systems and AI, building feedback loops where product data continuously improves models and models improve system behaviour.
 * Ship platform foundations, including internal frameworks, SDKs, and tooling, that accelerate engineers across the organisation.
 * Partner closely with ML and product teams to productionise research-grade ideas into customer-facing systems.
 * Help define the architecture of an AI-native financial stack by designing software with AI as a first-class runtime rather than bolting AI onto existing systems.