Top Tech Jobs & Startup Jobs in Seattle, WA

Interns will enhance Polymarket's outreach by driving awareness, creating content, and leading local events, while learning from industry experts.

Own technical onboarding and post‑onboarding support for market makers and institutional partners across CLOB, WebSocket feeds, RFQ gateway, and SDKs. Debug production integrations, write/maintain integration guides and code samples in Python and TypeScript, monitor integration health, and translate partner feedback into actionable product and engineering items.

Own the architecture and long-term direction of Polymarket’s intelligence-fusion platform. Design detection and correlation methods, ingest on-chain and OSINT data, improve data pipelines, automate investigation workflows, and build auditable tooling with analysts and investigators. The role requires deep experience in data or detection engineering, entity resolution, data fusion, scoring, corroboration, and scalable scheduled and event-driven systems. Experience with fraud, trust and safety, investigations, blockchain, or crypto data is advantageous.

Own end-to-end close and GL operations under US GAAP; lead technical accounting (ASC 606, 805, 350-40); manage financial reporting, audits, intercompany consolidations, and internal controls; scope and implement accounting systems and automation; advise on accounting for new products, international expansion, M&A, and crypto-native activity.

Investigate on-chain and order-book activity to detect insider trading, manipulation, wash trading, and illicit finance. Triage alerts, trace wallets across chains/bridges, analyze trading/execution data, document audit-ready cases, handle regulatory and law-enforcement requests, and build detection queries and lightweight analytics to improve surveillance signals.

Lead Growth Engineering architecture and implementation: build Go-based data pipelines, audit/replace martech, create experimentation infrastructure, ship full-stack Go/TypeScript features, productionize ML, review team work, and apply AI-assisted development daily.

Lead end-to-end investigations into insider trading, market manipulation, spoofing, coordinated multi-account activity, and blockchain fraud. Use on-chain analysis and trade-surveillance tools to trace wallets and funding flows, respond to subpoenas and legal process, write defensible investigative reports, and liaise with law enforcement and regulators.