Top Tech Jobs & Startup Jobs in Seattle, WA

Owns commercial legal matters, including drafting, reviewing, and negotiating SaaS agreements, NDAs, DPAs, MSAs, partnerships, and vendor contracts. Supports Sales, Product, and Operations, manages vendor due diligence and KYB checks, develops scalable contract templates and playbooks, advises on legal and regulatory risks, and ensures compliance with data protection, financial services, fintech, and blockchain requirements.

Own the architecture and delivery of mission-critical backend projects for a secure crypto wallet infrastructure platform. Define database, microservice, and integration architecture; resolve performance and reliability issues; improve CI/CD, observability, and engineering processes; shape technical strategy; mentor engineers; and support client discussions. The role requires deep backend, cloud, database, security, and applied cryptography expertise, with leadership experience in fintech or blockchain.

Lead the design, development, testing, optimization, monitoring, and maintenance of scalable backend systems and APIs. Build production-grade solutions for blockchain and DeFi use cases, conduct code reviews, document technical processes, troubleshoot complex problems, and mentor junior developers. Collaborate with frontend, product, and design teams while maintaining high availability, security, performance, and code quality across the Node.js and TypeScript technology stack.

Design, build, and operate secure core infrastructure for MPC signers, HSMs, TEEs, distributed databases, and blockchain-connected services. Develop low-level Rust middleware, secure APIs, and networking; optimize performance, reliability, latency, and resource usage; integrate cryptographic protocols into production; and collaborate with infrastructure, security, research, product, clients, and partners.

Own discovery, planning, and delivery for crypto-native, user-facing products. Research daily crypto users, define requirements, manage the backlog, and ship features with engineering and design. Make data-driven decisions on chains, wallets, and protocols; coordinate with compliance, marketing, support, and operations; and represent the company in crypto communities. The role requires strong product judgment, payments and checkout expertise, practical DeFi knowledge, wallet UX familiarity, and experience driving adoption across distributed teams.

Build and maintain secure, scalable APIs, backend services, platform infrastructure, and cloud systems for a Web3 wallet infrastructure provider. Responsibilities include designing resilient distributed systems, improving performance and availability, implementing monitoring and security controls, managing releases, writing comprehensive tests, resolving complex issues, documenting solutions, supporting customers, and collaborating across technical and business teams.

Principal Frontend Engineer responsible for architecting and maintaining a high-performance, real-time trading web application using React, Next.js, TypeScript, and Jotai. The role owns frontend features, optimizes mobile performance, manages real-time data and WebSockets, ensures code quality, and partners with founders and leadership on technology, product, and feature decisions. Experience building interactive trading platforms, particularly in DeFi, is required.

Design and operate secure, scalable, highly available infrastructure for a low-latency decentralized exchange and blockchain network. Own infrastructure automation, CI/CD, Kubernetes performance, observability, security, incident response, disaster recovery, cost optimization, and reliability practices. Mentor engineers, document systems, and participate in on-call rotations while supporting high-throughput trading workloads.

Design, build, optimize, deploy, and maintain Rust-based smart contracts powering a Solana DeFi protocol. Collaborate with engineering, product, and research teams on secure, scalable protocol features; develop developer tooling, SDKs, and integrations; monitor production on-chain services; and independently drive protocol initiatives from research through mainnet deployment. The role requires production smart contract experience handling real funds and strong blockchain and DeFi knowledge.

Own the architecture and operation of backend infrastructure supporting high-volume crypto trading. Build real-time pipelines for order books, trades, and market events; design GraphQL and WebSocket APIs; manage PostgreSQL, Redis, and ClickHouse data systems; optimize latency, caching, schemas, and queries; monitor reliability; debug performance issues; and collaborate with frontend and mobile teams.