Senior Software Engineer, Agent Platform & Orchestration

Fdetimes; San Francisco (CA); On-site; USD 200,000 - 400,000; Full time

Benefits offered by this job

Medical, Dental, and Vision benefits

401K and Retirement plan

Parental Leave

Fertility and family building benefits

Wellness stipend

Daily office lunches and snacks

Job summary

Decagon seeks a Senior Software Engineer for the Agent Platform to design and build the systems that power Decagon agents in real-world conversations. You will own distributed runtime components, model orchestration, and experimentation platforms that ensure fast, reliable, and scalable performance across millions of interactions.

This in-office role offers the chance to shape orchestration, routing, and tool invocation while collaborating with Research, Infra, and Product teams to push the

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.

Responsibilities

• 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 (e.g., transcription pipelines, turn-taking, latency improvements)
• Continuously adapt orchestration systems as model capabilities evolve

Skills

Distributed systems

Backend platforms

Ambiguous environments

End-to-end ownership

Experimentation

Reliability & observability

Debugging complex systems

Job description

Decagon seeks a Senior Software Engineer for the Agent Platform to design and build the systems that power Decagon agents in real-world conversations. You will own distributed runtime components, model orchestration, and experimentation platforms that ensure fast, reliable, and scalable performance across millions of interactions.

This in-office role offers the chance to shape orchestration, routing, and tool invocation while collaborating with Research, Infra, and Product teams to push the