Senior Backend Architect for AI-Driven Sourcing

Harmonic; New York (NY); On-site; USD 210,000 - 280,000; Full time

Job summary

Harmonic is seeking a senior backend architect to lead the Scout sourcing engine. You will own the end-to-end architecture, from data ingestion to ranking and model orchestration, and drive integration of ML/LLM techniques for high-quality results.

You will mentor engineers, shape long-term technical direction, and partner with Product to craft AI-native experiences. This role is based in the United States, NY, with a focus on scalable, reliable systems.

Qualifications

• 7-8+ years building distributed systems or large-scale backend architecture.
• Designed/scaled search, recommendation, or ranking systems balancing precision, recall, and performance.
• Led or contributed to ML/LLM integrations in production.
• Technical leadership: mentoring others, introducing frameworks, and influencing direction.
• Experience with data-intensive, asynchronous processing or event-driven architectures.

Responsibilities

• Architect the core intelligence behind Scout and own the end-to-end sourcing engine.
• Define scalable retrieval, reranking, and LLM-driven evaluation for personalized results.
• Create architectural patterns to integrate Scout with existing products for repeatable workflows.
• Lead agentic experimentation and evaluation; explore memory systems, embeddings, and prompt libraries.
• Improve evaluation pipelines and enable fast iteration while maintaining reliability and performance.

Skills

Distributed systems

Search systems

ML/LLM integrations

Technical leadership

Data-intensive systems

Job description

Harmonic is seeking a senior backend architect to lead the Scout sourcing engine. You will own the end-to-end architecture, from data ingestion to ranking and model orchestration, and drive integration of ML/LLM techniques for high-quality results.

You will mentor engineers, shape long-term technical direction, and partner with Product to craft AI-native experiences. This role is based in the United States, NY, with a focus on scalable, reliable systems.