Senior Software Engineer, Backend (Agentic AI)

Marina Del Rey, CA, Remote. Posted 6 days ago

The role

You will design, ship, and operate agentic systems that reason over large-scale time-series data and hardware domain context. You will build the infrastructure around models including tool interfaces, execution environments, and distributed systems. This role involves direct customer interaction to turn workflows into agent capabilities.

What you will do

Talk directly to customers and partner with product to turn workflows into agent capabilities
Design, ship, and operate agentic systems that reason over large-scale time-series data
Build tool interfaces, sandboxed execution, context and memory management, and guardrails
Build distributed systems for long-running agent work
Design job-based execution systems on Kubernetes in the cloud and on-prem
Develop and maintain Sift’s MCP server
Design and implement APIs that power agentic capabilities
Build evaluation suites to measure agent performance
Integrate and assess frontier models across providers

Required qualifications

8+ years of professional software engineering experience
Built APIs (REST, gRPC, etc.) and complex backend services with technologies like Go, Python, Rust, or similar
Working knowledge of distributed systems fundamentals

Nice to have

Shipped products to users at scale
Shipped LLM-powered features
Built agentic systems: multi-step tool use, planning loops, context management, and evals
Designed tool ecosystems for agents, including MCP
Worked with sandboxed or isolated execution of generated code
Operated services in production (Kubernetes, observability, incident response)
Worked with streaming or time-series data systems (Kafka, Flink, TimescaleDB)
A personal ecosystem of AI dev tooling
A background in time-series data, scientific computing, or hardware test and telemetry
Built internal agentic tooling that accelerates an engineering org

Benefits

Equity
Benefits

Before you apply

U.S. Person Required: Must be a U.S. citizen, lawful permanent resident, or protected individual such as an asylee or refugee in compliance with ITAR / EAR regulations

About the company

Sift is the data infrastructure platform for hardware engineering teams. Founded by former SpaceX engineers, they build the review and analysis layer for the AI era of physical systems.