Top Tech Jobs & Startup Jobs in NYC, NY

Lead and scale the accounting function: manage monthly close and financial statements, ensure US GAAP compliance (including digital assets), implement controls and automation, oversee payroll/AP/AR, own digital asset reconciliations, support tax and management decisions, and build and mentor the accounting team.

The Senior HR Generalist manages employee lifecycle activities, including onboarding, offboarding, employee relations, performance reviews, development plans, HR compliance, policy updates, records management, HR reporting, and employee engagement initiatives. The role advises employees and managers, supports a positive workplace culture, maintains confidential HR data, and improves HR processes across assigned departments.

Provides high-touch, confidential executive support to the CEO, including complex scheduling, travel planning, email and correspondence management, expense reporting, project coordination, and event planning. The role requires proactive anticipation of executive needs, strong organization, discretion, communication skills, and experience supporting C-suite leaders in high-growth technology companies. Candidates must be based in North America EST or the United Kingdom.

Lead product marketing and go-to-market growth for ZeroDev, Offchain’s smart account and wallet infrastructure. Responsibilities include positioning, launches, content, SEO, lifecycle campaigns, HubSpot administration, lead management, funnel analytics, sales enablement, partner marketing, paid campaigns, budgeting, and pipeline tracking. The role requires close collaboration with Product, Engineering, Legal, Sales, and ecosystem partners while connecting marketing activities to revenue.

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.

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.