Senior AI Software Engineer - Cortex Team (Remote)

Flourish Ventures; United States; Remote; USD 150,000 - 210,000; Full time

Job summary

Hummingbird is a remote-first, fully distributed team fighting financial crime with AI-powered compliance tools. As a Senior Software Engineer on the Cortex Team, you’ll design and ship customer-facing AI features and iterate on our context-aware AI Assistant and Review Agent.

You’ll collaborate with Product, Design, and other engineers to bring ideas from prototype to production, ensuring scalable, secure systems.

Qualifications

• Shipped 0-1 products to real users (ideally AI products).
• Strong focus on quality, testing, and security.
• Curiosity and creativity in learning new technologies.
• Purpose-driven builder to make AI that improves safety and transparency.
• Solid backend fundamentals and data-driven decision making.

Responsibilities

• Build AI features end-to-end with measurable impact.
• Scale systems to handle high data volumes with reliability.
• Improve grounding, citations, and auditability of AI outputs.
• Collaborate with Product and Design from discovery to production.
• Drive latency, cost, and performance optimizations.

Skills

AI systems

Backend engineering

Data fluency

Observability

Security mindset

OpenAI integration

Tools

Terraform

CircleCI

Nix

Docker

Ruby on Rails

Python

OpenAI

Job description

Hummingbird is a remote-first, fully distributed team fighting financial crime with AI-powered compliance tools. As a Senior Software Engineer on the Cortex Team, you’ll design and ship customer-facing AI features and iterate on our context-aware AI Assistant and Review Agent.

You’ll collaborate with Product, Design, and other engineers to bring ideas from prototype to production, ensuring scalable, secure systems.