Senior Product Designer

Job description

We’re looking for a Product Designer to own design across three products:

1. Appstack: attribution and analytics for mobile apps. Complex data, clear interfaces.
2. Luna: our internal product. Tools that make our team faster.
3. Reason to Stay: a mobile app that connects letters from strangers to people going through a hard time.

End-to-end ownership, from research to production-ready UI, working side by side with Product and Engineering. Reporting directly to the CEO.

What is Appstack?

At Appstack, we are redefining how mobile apps grow through paid ads by providing access to reliable attribution and precise analytics. With our 'Enhanced App Campaigns' protocol, a state-of-the-art solution that enables advertisers to run app campaigns with superpowers, we are helping the most ambitious apps to scale and make more money.

Responsibilities

• Product design: own flows and UI across Appstack (B2B analytics), Luna (internal tools) and Reason to Stay (consumer)
• Research: talk to marketers, teammates and consumers, and test your designs with them
• Systems: build and evolve design systems that scale with each product
• Shipping: work directly with engineers so what you design is what ships, down to the details
• Iteration: improve continuously based on feedback, data and business goals

You might be a good fit if...

Must-haves

• A portfolio that shows how you think, not just what you shipped (no formal education required)
• 2+ years as a Product Designer
• Strong Figma skills (components, auto layout, design systems)
• Solid UX fundamentals: information architecture, interaction design, user research
• Fluent English
• Based in Buenos Aires, available for a full-time, hybrid role at our office in Palermo

Nice-to-haves

• Experience with data-heavy, dashboard-style SaaS products
• Experience designing consumer mobile apps
• Experience designing internal tools or back-office products
• Basic HTML/CSS, or comfort prototyping with AI tools
• Interest in mobile marketing or attribution

You are not a good fit if...

Attitude

• You believe you already know everything and resist feedback
• You’re satisfied with your current skills and don’t want to keep improving
• You only want to design one kind of product and switching contexts drains you

Lack of rigor

• You consider a design done once it looks good in Figma, without caring about edge cases, empty states or how it actually ships
• You hand off designs and disappear instead of following them through to production

Why join Appstack?

• Learn a lot by working with the top 1% of tech talents
• Opportunity to shape the technical foundation and future of a growing startup.
• Work in a dynamic and collaborative environment with modern tools and technologies.
• Drive meaningful impact by owning the platform's key features and shaping the user experience.