Staff Full-Stack Engineer

Katapult Labs

18h • Remote

About The Position

This is a Staff Full Stack Engineer role focused on backend architecture, where the engineer will be the second core member of the founding team. AI workflows, LLM orchestration, and creative generation pipelines are central to the work. The domain involves regulated external API writes to ad platforms, meaning errors carry real financial and legal consequences. Strong candidates come from ad tech or similar compliance sensitive environments and know how to build safe, auditable systems by default.

Requirements

• Senior backend engineer experience.
• Experience shipping production systems using LLMs and media generation APIs.
• Experience in a precision sensitive domain such as ad tech, fintech, or healthcare.
• Proven track record building auditable, recoverable systems where mistakes carry real consequences.

Nice To Haves

• Experience with Meta Marketing API, Snapchat Ads API, TikTok Business API, or Apple Search Ads.
• Background in ad tech, mar tech, or performance marketing engineering.
• BigQuery or analytics warehouse experience for performance data and learning loops.
• Familiarity with Slack apps, Block Kit, or workflow integration.
• Exposure to MCP, agent tooling, or AI workflow orchestration in production.

Responsibilities

• Take full ownership of complex systems end to end.
• Build with AI as a core part of the architecture.
• Ship production systems using LLMs and media generation APIs.
• Determine when to use agentic approaches versus deterministic pipelines.
• Work autonomously.
• Communicate clearly.
• Surface blockers early.
• Thrive in fast-moving environments without needing top-down structure.
• Build auditable, recoverable systems where mistakes carry real consequences.

Benefits

• Work from Anywhere in Latin America
• 23 Days of PTO per Year
• USA Federal Holidays
• Monthly Payment in USD
• Contractor Agreement with No End Date
• $50/month rental stipend for BYOD
• $75/month Health Insurance Stipend

What This Job Offers

• Job Type: Full-time
• Career Level: Senior
• Education Level: No Education Listed