Top Tech Jobs & Startup Jobs in Seattle, WA

Own business operations priorities and cross-functional technical and security projects. Build project plans, coordinate stakeholders, manage timelines and dependencies, collect compliance evidence, improve processes, identify risks and blockers, and drive high-quality execution across People, IT, Finance, Security, and Operations.

Develop and maintain backend infrastructure for Arbitrum, focusing on distributed systems, blockchain scalability, security, performance, compiler pipelines, SDK frameworks, microservices, databases, and API architecture. Responsibilities include maintaining Nitro Testnode, reviewing code, supporting stakeholders, collaborating with research and security teams, and driving technical roadmaps for high-performance blockchain systems.

Support end-to-end M&A, strategic investments, fundraising preparedness, business-case development, post-merger integration, and corporate strategy. Build valuation models, conduct market and operating diligence, prepare executive communications, manage deal processes, and develop relationships with blockchain founders and industry leaders.

Conduct code audits and penetration tests across AWS cloud environments, infrastructure, backend applications, and blockchain ecosystem tools. Lead red-team exercises, collaborate with detection engineering and incident response teams, develop offensive security automation, support investigations, research emerging threats, and mentor junior staff. The role requires expertise in AWS attack techniques, binary exploitation, web application security, adversary frameworks, and offensive tooling, with Web3 and blockchain security experience preferred.

Lead and build a high-performing marketing function to craft narratives, drive brand, communications, product marketing, content, partnerships, and campaigns. Mentor teams, define OKRs and operating rhythms, translate technical product value into business outcomes, measure impact, and manage budgets and agency relationships to grow the Arbitrum ecosystem and enterprise adoption.

Lead client-facing technical strategy and developer success for Arbitrum, driving bespoke integrations, onboarding, and adoption. Manage and grow a technical solutions engineering team, collaborate with product, engineering, and research, and translate customer needs into platform improvements and go-to-market plans.

As a Senior Backend Engineer at Offchain Labs, you'll tackle complex distributed systems challenges, optimizing performance and contributing to the security and scalability of blockchain technology.

The Head of Enterprise will develop commercial strategies, manage product development, and lead cross-functional teams while driving adoption in the blockchain ecosystem.

Build and operate Go backend services for a non-custodial KMS powering embedded wallets. Implement key recovery, distributed key generation, TEE integrations, authentication and signing-provider flows, security review and hardening, and production operations on Kubernetes, including observability, secrets/certificate management, and compliance controls.