[Hiring] Senior Full-Stack Builder @Katapult Labs

Role Description

We're not looking for a developer who executes tickets. We're looking for a builder engineer: someone with full product vision, able to move across architecture, backend, frontend, mobile and UX without waiting for someone else to tell them what to do (part Full-stack Engineer, part Designer, part Product Manager).

Technical depth is the floor here, not the differentiator. What actually sets builders apart is how they orchestrate AI agents day to day:

• Planning work
• Running things in parallel
• Reviewing output critically

Excellent communication is core to this role: you'll need to articulate product decisions clearly, align with stakeholders across functions, and make your reasoning legible to both humans and the AI agents you're directing.

Responsibilities

• Design and build product end-to-end alongside the client: architecture, data model, integrations, and the final interface, always with an eye on where each piece fits in the bigger picture.
• Work in lean teams, typically starting at 2-3 people and scaling as the project grows, always with direct client exposure and no manager or lead absorbing that communication on your behalf.
• Translate ambiguous business needs into a clear, executable technical plan, and argue for the why behind your decisions, not just the what.
• Give proactive, honest updates and know when and how to push back on scope, asking the right questions early before a technical issue becomes a trust issue with the client.
• Use AI tools (like Claude and Claude Design) as a daily speed multiplier, leaving behind the context, rules, and tests that let agents run reliably on your work going forward.
• Co-create with the client rather than simply taking orders; actively help shape product decisions, not just implement them.

Qualifications

• Fluent English, enough to hold product and architecture conversations directly with US-based clients.
• Solid full stack experience (backend + frontend); mobile or micro-frontend experience is a plus.
• A track record of turning fuzzy product conversations into working architecture quickly, thinking about scalability, access control, and integrations from day one.
• Real seniority: comfortable running an engagement solo when the client needs it, with a track record that includes both wins and lessons learned.
• Prior experience working directly with clients or business stakeholders; startup or product-consulting backgrounds are a strong fit.
• Comfortable using AI tools as a core part of your daily workflow, including planning and reviewing agent output critically, not just running prompts.

Benefits

• Work from Anywhere in Latin America: Enjoy the freedom to work remotely from any country in Latin America.
• 23 Days of PTO per Year: Take time to recharge with paid time off, accrued monthly (1.91 days/month).
• USA Federal Holidays
• Monthly Payment in USD: Get paid in US dollars, no matter where you are.
• Contractor Agreement with No End Date: Enjoy the stability of a long-term contract.