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Senior / Staff Software Engineer (AI Agents)

Actively AI· Engineering
Apply on company site
New York, NY$180k - $220kFull-timePosted 7mo ago

About the role

Senior/Staff Backend Engineer to architect and build large-scale, event-driven systems powering Actively’s GTM AI agents, integrating with LLMs, orchestrating complex workflows, and ensuring reliability at enterprise scale.

Responsibilities

  • Design and build the agents that power Actively’s platform. Model complex customer and business workflows into clear, reliable agent logic that reasons over streaming data, maintaining state, decides what to do next, and acts consistently across systems — continuously and at massive scale.
  • Develop orchestration and workflow primitives for agent and human collaboration. Translate nuanced, long-running real-world scenarios into well-structured agent behaviors that are predictable, maintainable, and easy to extend.
  • Ensure reliability through good modeling. 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.

Qualifications

  • 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.
  • Strong backend engineer. Deep Python expertise and solid fundamentals in concurrency, transactions, and performance tuning.
  • 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.
  • Fluent in modern infrastructure. Familiar with streaming and workflow technologies (Kafka, Pub/Sub, Temporal-like), and data stores across relational, in-memory, and vector paradigms.
  • Collaborative and pragmatic. You value iteration, clear communication, and helping others move faster without sacrificing quality.
  • 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.

Skills

Required:PythonConcurrencyEvent-driven architectureStreaming/workflow technologies
Nice to have:LLM integrationData stores

Benefits

  • Competitive Early-Stage Equity
  • Health, Dental, Vision Coverage
  • Unlimited PTO + Recharge Days
  • Catered Lunch on Tuesday & Friday w/ Dinners every day
  • Fully Stocked Kitchen
  • Cutting-Edge Tech & Tools
  • Annual Off-sites & Monthly Events
  • Commuter Benefits
  • Cozy Office in NYC
Last updated Jul 15, 2026. Interested? Apply on the company site.

About Actively AI

GTM Superintelligence to Maximize Revenue

Actively AI is GTM superintelligence built to boost revenue per rep. The world’s most innovative revenue teams use our per-account agents to power next-best actions across their entire TAM and scale AI-driven growth.

GTM superintelligenceAI-driven growthper-account agentsenterprise-scale GTM
Company profileWebsite

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