Senior Software Engineer, Agent Platform

The role

You will design and build systems that govern how Decagon agents operate in real-world environments. You will own complex, distributed systems including execution frameworks, model orchestration logic, and experimentation platforms.

What you will do

• Design and evolve agent harnesses that power different product experiences
• Build core runtime systems, including AOP execution and multi-model orchestration
• Develop control-plane logic for routing, planning, and tool invocation with strong safety guarantees
• Optimize agent systems for latency, reliability, and production correctness
• Analyze real-world failures and use data to drive iterative improvements
• Build and operate online experimentation (A/B testing) and contribute to offline evaluation frameworks
• Improve observability, testing, and simulation systems to ensure safe, measurable progress
• Contribute to voice and real-time systems
• Continuously adapt orchestration systems as model capabilities evolve

Required qualifications

• Strong experience building distributed systems or backend platforms in production environments
• Comfort working in ambiguous, fast-moving environments with rapid iteration cycles
• Experience owning systems end-to-end, from design through production and iteration
• Familiarity with experimentation, evaluation, or data-driven product improvement loops
• A track record of improving system reliability, performance, and observability
• Ability to debug complex systems and identify root causes of failures

Nice to have

• Built or worked on agent harnesses, orchestration layers, or execution frameworks
• Think in terms of control planes, feedback loops, and system-level optimization, not just features
• Excited about diagnosing failure modes and iterating toward measurable improvements
• Care deeply about production quality—not just making systems work, but making them reliable, safe, and scalable
• Motivated by pushing the frontier of how intelligent systems behave in the real world

Benefits

• Medical, Dental, and Vision benefits for you and your family
• Life Insurance and Disability Benefits
• Retirement Plan (e.g., 401K, pension)
• Parental Leave
• Fertility and family building benefits through Carrot
• Monthly stipend to support your wellness, lifestyle, and work-life balance
• Daily lunches and snacks in the office
• Take what you need vacation policy

About the company

Decagon is a conversational AI platform that enables enterprises to deploy AI agents across various channels. The company is an in-office company driven by values like Just Get It Done and The Polymath Principle.