Actively AI

Senior / Staff Software Engineer (AI Agents)

New York, New York, United States · Staff+ · Full-time

Sponsorship not specified$180k-$220kDetected 103 days ago

PythonTemporalKafkaLLMsAgentic AILogisticsResearchCommunication

About the role

These agents continuously reason over real-time customer and external data, generate next-best actions, and execute them reliably across systems with humans in the loop.
This is a foundational role, shaping how production-grade agents operate at enterprise scale.

Design and build the agents that power Actively's platform.
Develop orchestration and workflow primitives for agent and human collaboration.
Design agents with clear state transitions, strong data contracts, and explicit guarantees - embedding observability and fault tolerance into their design so they behave correctly over millions of events and long-lived sessions.
Continuously evolve agent design. Simplify complex behavior through better abstractions, documentation, and testing - ensuring agents remain reliable and comprehensible as capabilities, data volume, and concurrency grow.
Experienced systems builder. You've designed and operated large-scale, event-driven backend systems - modeling complex, long-lived workflows into clear, maintainable, and reliable software.
Architectural thinker. You reason about trade-offs between consistency, latency, fault-tolerance, and cost - building for correctness and adaptability.
Product-minded. You care about usability, developer experience, and how system design translates into real customer value.
Curious about AI systems. You're excited by how LLMs, retrieval systems, and agents can transform enterprise software - and you want to build the infrastructure that makes it real.
You own outcomes, not just tasks, and see directly how your work changes what customers can do - across a product and go-to-market motion that is scaling fast.

Deep Python expertise and solid fundamentals in concurrency, transactions, and performance tuning.
Experience scaling mission-critical systems with high reliability requirements (payments, messaging, logistics, orchestration).
It's not often that you can get in on the ground floor of a well-funded startup that's scaling very fast.
Actively AI provides an estimate of the compensation for roles that may be hired as required by state regulations.

may vary based on (a) location, as Actively AI factors in specific location when benchmarking compensation for most roles; (b) individual candidate skills and qualifications; and (c) individual candidate experience.
Additionally, Actively AI leverages current market data to determine compensation, so posted compensation figures are subject to change as new market data becomes available.
The salary, other compensation, and benefits information is accurate as of the date of this posting.
$180,000 - $220,000.
🌴 Annual Off-sites & Monthly Events
The base salary range for this full-time position based in New York is: $180,000 - $220,000.

🚀 Competitive Early-Stage Equity
⚕ Health, Dental, Vision Coverage
💡 Unlimited PTO + Recharge Days
🚆 Commuter Benefits
The salary, other compensation, and benefits information is accurate as of the date of this posting.

Intelligence-Led Revenue.
Revenue organizations have always been bottlenecked on human capacity.
Reps triage which accounts get attention.
Context disappears at every handoff.
On any given day, the vast majority of accounts have exactly zero people thinking about them.
Actively addresses this at the structural level.
Our platform deploys Per-Account AgentsTM across our customers' TAM, working 24/7 to research, identify opportunities, and advance next steps without being asked.
Leading enterprises including Ramp, Ironclad, and Samsara are already making this shift.
Our co-founders are former Stanford AI researchers, and the team comes from Harvard, CMU, Berkeley, Brex, Scale AI, and Google.
We've raised $68M from TCV, First Harmonic, Bain Capital Ventures, First Round Capital, and more.
people who work from first principles, move with urgency, and care deeply about building something that drives real value.
If that's the kind of challenge you're looking for, Actively is the right place.

Actively AI is an equal opportunity employer; committed to a community of inclusion, and an environment free from discrimination, harassment, and retaliation.

This listing is sourced directly from Actively AI's careers page and normalized into a canonical job model.