Staff iOS Engineer

Polymarket

Staff iOS Engineer for Polymarket building iOS products and enhancing mobile experiences. Collaborating with product, design, and engineering teams to set technical direction.

Posted 6/16/2026full-timeNew York City • New York • 🇺🇸 United StatesLeadWebsite

Tech Stack

Tools & technologies

iOSSwift

About the role

Key responsibilities & impact

Own the iOS product. Take end-to-end ownership of Polymarket's iOS experience, from technical architecture and performance to product quality and release discipline.
Set the technical direction. Make and own architectural decisions for the iOS platform, ensuring the codebase is built to scale and maintained with rigor as the product grows.
Build for real-time. Design and implement experiences that handle live market data, fast-moving prices, and real-time order state in a way that feels fast and reliable to users.
Raise the engineering bar. Lead code reviews, establish strong iOS engineering standards, and help grow the capability of the broader mobile team.
Partner across the company. Work closely with product, design, and backend teams to align on priorities, define APIs and data contracts, and ship high-quality experiences end-to-end.
Contribute to mobile strategy. Help shape how Polymarket thinks about mobile as a platform, including architecture decisions that set up the team for scale.

Requirements

What you’ll need

Significant iOS engineering experience, with a track record of shipping and owning high-quality iOS applications in production
Deep experience building trading, financial, or sportsbook applications – you understand the product domain and the technical demands that come with it
Strong knowledge of Swift and the iOS SDK, with solid instincts around performance, memory management, and real-time data handling
Experience building apps that consume live data feeds and display fast-moving information reliably and smoothly
A high bar for product quality: you care about how things feel, not just whether they work
Comfortable operating with broad ownership in a fast-moving environment
Strong cross-functional communication skills: you work well with product, design, and backend engineers
(Plus) Familiarity with WebSockets, streaming APIs, or other real-time data infrastructure
(Plus) Experience leading or mentoring iOS engineers
(Plus) Background in a high-growth startup environment

Benefits

Comp & perks

Competitive salary & equity
Unlimited PTO
Full Health, Vision, & Dental coverage
401k match
Hardware setup: new MacBook Pro, big display, & accessories

ATS Keywords

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Applicant Tracking System Keywords

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Hard Skills & Tools

iOS engineeringSwiftiOS SDKreal-time data handlingperformance optimizationmemory managementAPI designcode reviewsmobile architecturetrading applications

Soft Skills

cross-functional communicationleadershipownershipproduct quality focuscollaborationmentoringadaptabilityproblem-solvingattention to detailstrategic thinking