Senior Software Engineer

The role

Raydar is recruiting for this role on behalf of our client. A hands-on senior engineer who builds and ships AI-driven software systems, sets technical direction alongside engineering leadership, and guides a team of junior engineers. The work spans core platform development, packaging software for customer-hosted deployments, and turning customer feedback into product improvements.

What you'll do

• Build and improve core services and runtime components in Python.
• Turn loosely defined problems into working AI-driven systems, then refine them using evaluation data, traces and telemetry.
• Package and deploy software in containers for customer-hosted environments.
• Lead a quick-moving group of junior engineers by identifying where work stalls, ranking tasks and making design choices alongside engineering leadership.
• Work with field-facing engineers to turn customer learnings into product changes.

What we're looking for

• Six or more years of software engineering experience, or four or more for ground-floor founding engineers and founders.
• Track record of putting a modern AI agent or LLM-based product into production from start to finish.
• Experience leading an engineering team or a major project, ideally at a startup.
• Strong backend and infrastructure depth across Linux, Unix, containers, networking and storage.
• Strong Python skills.
• Solid grounding in distributed architecture, performance tuning and handling data at scale.
• Has designed large system structures for server-side or infrastructure work, ideally while on an early company's leadership team.
• Engineering degree in computer science, electrical engineering or electrical and computer engineering from a highly ranked engineering school.

Bonus points

• Hands-on experience with post-training methods for language models, such as reinforcement learning from human feedback, preference optimization or reinforcement learning for agents.
• Experience with TypeScript, Rust, C++ or Go.

Compensation and benefits

• Base salary: USD 200,000 to 300,000 per year
• Equity
• Health, dental and vision coverage
• Retirement plan

Location and work model

• San Francisco, CA, United States
• On-site, 5 days in-office
• Full-time