CareerPlan

Senior Software Development Engineer

New York, New York, United StatesFull-time$168k–$250k2026-11-09 → 2026-11-11
Based in United States

Core

Design and deliver the architecture and production systems for an agentic auto-optimization framework that uses LLM-based agents to automatically improve ad campaigns for millions of advertisers.

Role type

Senior Software Development Engineer (System Architecture & Production Engineering)

Builds

Agent execution engine, action layer for live campaign changes, evaluation pipelines, and model serving infrastructure

Domain

Advertising technology, Generative AI, Large Language Models (LLMs), Reinforcement Learning

Deliverable

production ML models

Required skills

System architecture, LLM-based agent orchestration, RL fine-tuning, production system reliability, safety standards for automated systems, A/B testing design, mentoring

Preferred skills

Full software development lifecycle, code reviews, source control, build processes, testing, operations

Technologies

LLMs, MCP (Model Context Protocol), RL fine-tuning, preference optimization, auction simulation

Responsibilities

Own the auto-optimization platform's architecture and engineering roadmap; Build the agent execution engine covering orchestration and scheduling; Build the action layer applying changes to live campaigns with safety controls; Set safety standards including observability and drift detection; Build offline and online evaluation pipelines; Prototype new system designs and agent patterns; Mentor engineers and lead design reviews

Seniority

Senior, hands-on IC with leadership responsibilities