Senior Full-Stack Builder

About the role

SENIOR FULL-STACK BUILDER

Location: Remote (Latin America) | Type: Full-time

About Katapult

Katapult is an AI-first engineering studio connecting senior LATAM talent with startups and companies in the US. We're not a staff-augmentation shop: every person we put in front of a client represents Katapult, co-creates product, and owns the outcome directly, with no managers or leads acting as a layer in between.

About the role

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), the harness they leave behind so agents and humans can keep running reliably on their work, and how well they see product, market and channel as one connected system rather than isolated tickets. 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 because in a role this autonomous, how well you communicate is often what determines how far your work actually scales.

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. Invisible work reads as no work.

- 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. Katapult covers the cost of top-tier tooling so you can work at full capacity.

- Co-create with the client rather than simply taking orders; actively help shape product decisions, not just implement them.

What we're looking for

- Fluent English, enough to hold product and architecture conversations directly with US-based clients. This is client-facing work, so it's non-negotiable.

- Solid full stack experience (backend + frontend); mobile or micro-frontend experience is a plus.