Software Engineer, Platform/Applied AI (YC)

About the Role

An applied research lab is building data solutions for foundation model development, serving every frontier AI lab with a mission to deliver the best data to power the best models. Its work helps make expertise that once took a lifetime to build, available to everyone. The team works directly with foundation model developers, shaping how their systems improve.

As a core engineer and one of the company’s first hires, you’ll build data infrastructure shaping frontier model development. You’ll own entire projects end-to-end, take on significant responsibility, and see your impact immediately.

Key Responsibilities

• Build and scale complex data capture workflows across web (Next.js) and desktop (Python).
• Architect and optimize high-throughput data pipelines under heavy loads.
• Collaborate with the founding team on product strategy and ship features fast.
• Establish engineering best practices and foundations for team growth.

Requirements & Tech Stack

• Proficiency in JavaScript (Next.js) and Python, with experience building full-stack web applications.
• Experience with serverless architecture and cloud functions for heavy data processing on GCP/AWS.
• Hands-on experience with Redis (caching), Elasticsearch (indexing), and message queues (Kafka/RabbitMQ) for scalable, low-latency pipelines.
• Experience taking ideas into production; founder experience preferred.

Qualifications

• Background in AI research, LLM evaluations, or human-in-the-loop systems.

Company Benefits (For Eligible Employees):

• Medical, vision, and dental insurance
• 401(k) with employer match
• Daily UberEats meal stipend
• Monthly wellness stipend