Product Designer, Builder

Stellartech Research Corporation

Product Designer and Builder creating AI-powered prototypes for SmartyMe, a mobile educational app with over one million users. Owning product problems, hypotheses, design, testing, and measurement.

Posted 8/10/2026contractRemote • 🇺🇸 United StatesMid-LevelSeniorWebsite

Core Competencies

Role fit

Core Competencies

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Demonstrates expertise in product design for mobile applications, with a strong focus on user-centered design, prototyping, and metrics-driven decision-making. Proficient in using AI tools for prototype development and Figma for design execution.

Highest-signal resume keywords

Product Design ExperiencePrototyping With AI ToolsFigma ProficiencyUser-Centered DesignMobile App Development

ATS Keywords

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Applicant Tracking System Keywords

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Hard Skills

Product DesignPrototypingUser ResearchDesign SystemsMobile App DesignAI-Powered FunctionalityHypothesis DevelopmentMetrics MeasurementActivation and Retention StrategiesAttention to Design Craft

Soft Skills

High OwnershipProactivityComfort With AmbiguityStrong CommunicationDecision-Making

Tools & Technologies

FigmaClaude CodeCodexReplitSlack

Industry Keywords

EdTechMobile AppsConsumer AppsWellness ProductsHabit-Building Products

About the role

Key responsibilities & impact

Own product problems from discovery through design, prototyping, launch, and measurement
Understand user problems using user conversations, data, and the product
Build working prototypes independently with AI tools such as Claude Code, Codex, and Replit
Define product hypotheses and expected metrics before starting work
Measure whether product metrics moved after launch
Own specific product branches in partnership with the product manager
Create simple, consistent design solutions with careful spacing, typography, states, and edge-case handling
Work on SmartyMe, a mobile educational app used by more than one million users
Communicate design decisions in Slack, Figma, and live sessions
Participate in portfolio screening, recruiter screening, partnership-fit and team-fit interviews, and a live working session using an incomplete SmartyMe problem

Requirements

What you’ll need

3+ years of product design experience, including mobile apps
Hands-on product design experience on real products, ideally mobile-first consumer apps
Working-prototype development with AI tools such as Claude Code, Codex, Replit, or similar; this is a requirement
Ability to express work as hypotheses, including expected change, approximate magnitude, and failure indicators
Comfortable designing AI-powered functionality and adapting to shifting hypotheses
Figma proficiency: components, auto layout, variants, prototyping, and versioning
High ownership and accountability for outcomes
Proactivity and ability to identify and initiate work
Comfort with ambiguity and underdefined problems
Preference for shipping rough working versions early
Strong attention to design craft, including spacing, clarity, copy, and details
Ability to communicate design decisions directly in Slack, Figma, and live sessions
Ability to make decisions with incomplete information
EdTech, wellness, or habit-building product experience is a plus
Experience with activation and retention work, games or content-heavy products, design systems, or independently shipped products is nice to have

Benefits

Comp & perks

Direct reporting to the VP of Product
Direct feedback from experienced product team members
Freedom to test hypotheses without waiting for consensus or planning cycles
Clear production risk guardrails
Broad scope combining design, product decisions, and building
Short path to decisions
AI tools integrated into the way of working