Principal Product Experience Engineer jobs in United States
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Polygon.io · 10 hours ago

Principal Product Experience Engineer

positionUnited States
timeFull-time
remoteRemote
seniorityLead/Staff

Polygon.io is committed to democratizing access to the world's financial market data and enabling developers to build the future of fintech. They are looking for a Product Engineer to help define product development in an AI-first world, focusing on creating new user experiences from design to implementation while collaborating closely with product, design, and QA teams.

Developer APIsFinancial ExchangesFinTechStock Exchanges

Responsibilities

Own product initiatives from hypothesis to shipped experience, with clear intent and validation signals
Use AI extensively to accelerate prototyping, implementation, iteration, and exploration of UX ideas
Design and build complete user experiences, from interaction models to polished, production-ready frontend code
Start with small, explicit bets and ship early versions to learn and refine rather than over-planning upfront
Iterate based on real-world usage and feedback, deciding when to continue, adjust, or stop
Partner with product, design, and QA to clarify problems, define quality bars, and maintain coherence without heavy handoffs or queues

Qualification

Frontend engineeringReactTypeScriptAI toolsUX designProduct analyticsPerformance optimizationProduct judgmentFollow-throughFounder mentalityFast-moving environmentsFinancial markets knowledgeOwnership

Required

Exceptional frontend engineering skills with deep mastery of modern frontend development including React, TypeScript, modern CSS, browser APIs, performance, and accessibility
Proven ability to design and implement complex, high-quality interfaces with excellent interaction and polish
Strong architectural instincts for frontend systems that scale in complexity without becoming brittle
Comfort owning the frontend end to end, from initial prototype to long-lived production code
Strong product judgment with the ability to frame work as hypotheses and evaluate outcomes using real signals
Strong instincts around scope, sequencing, and tradeoffs
Practical UX sensibility—you can execute thoughtful UX without relying entirely on mocks
AI-native workflow where you already use AI tools meaningfully in your day-to-day work and treat AI as leverage for thinking and building
Ownership and follow-through—comfortable carrying work across definition, build, release, and evaluation
Experience using product analytics tools such as PostHog, Amplitude, or similar to define signals, evaluate bets, and guide iteration
Founder mentality with comfort making decisions under uncertainty and taking responsibility for outcomes
Experience working in fast-moving environments where direction is shaped through execution rather than detailed plans

Preferred

Background in financial markets, market data, or data-intensive products is a plus

Company

Polygon.io

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Massive empowers participation in the financial markets by providing fair access to market data through a developer-focused platform.
dateFounded in 2016
location
Atlanta, Georgia, USA
people-size51-200 employees
web-link
https://massive.com

Funding

Current Stage
Growth Stage
Total Funding
$6.35M
Key Investors
Headline
2020-09-16Series A· $5.75M
2019-10-02Convertible Note· $0.1M
2019-08-12Convertible Note· $0.5M

Leadership Team

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Quinton Pike
Founder
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Recent News

Newsfile
Massive Closes the Market
2025-11-15
Benzinga.com
EXCLUSIVE: Brokerages Using AI To Help Customers - 'At The Forefront Of Where We're Heading'
2025-11-12
EIN Presswire
Polygon.io is now Massive
2025-11-03
Company data provided by crunchbase