Senior Engine & Distributed Systems Engineer – AI Workflows

StackAI; New York (NY); On-site; USD 202,000 - 230,000; Full time

Job summary

StackAI is seeking a Senior Software Engineer, Engine & Distributed Systems to own the durable runtime at the heart of our no-code AI workflow platform. This is deep systems work in a production environment where correctness and scale matter every second.

You will own the execution engine, durability features like checkpointing and recovery, and the scheduling model that keeps work moving from synchronous to asynchronous as load grows, with a focus on reliability and performance across

Qualifications

• 5+ years building backend systems in production, with real depth in distributed systems.
• Hands-on experience with durable execution or workflow orchestration (Temporal, Cadence, or equivalent).
• Strong concurrency, queueing, retries, and fault tolerance under load.
• Strong in Python and modern backend frameworks (FastAPI or similar), with sound database fundamentals (Postgres or similar).
• You're drawn to the correctness problems that everything else quietly depends on.

Responsibilities

• Own the execution engine. The runtime, scheduling, and sub-agent parallelization that run every agent on the platform.
• Make long-running work durable. Build checkpointing, resumption, and recovery so agents survive failures and restarts and pick up exactly where they left off.
• Shape the execution model. Decide how work is scheduled, queued, and moved from synchronous to asynchronous, so the platform stays correct and responsive as load grows.
• Engineer for scale and reliability. Hold the engine to strict health targets for worker freshness, deploy safety, and drain time, and keep latency and throughput strong as volume grows.
• Keep the engine open to the ecosystem. Make it straightforward to bring new agent harnesses, orchestration frameworks, and model capabilities into the runtime.

Skills

Distributed systems

Durable execution

Python

FastAPI

Concurrency

Tools

Temporal

Cadence

PostgreSQL

Job description

StackAI is seeking a Senior Software Engineer, Engine & Distributed Systems to own the durable runtime at the heart of our no-code AI workflow platform. This is deep systems work in a production environment where correctness and scale matter every second.

You will own the execution engine, durability features like checkpointing and recovery, and the scheduling model that keeps work moving from synchronous to asynchronous as load grows, with a focus on reliability and performance across