Senior Backend Engineer

At Offchain, we aren’t just building products: we’re leading a movement.

As pioneers in blockchain scalability and security, we're at the forefront of transforming how the world interacts with decentralized applications. We're laying the foundation that will define the next generation of digital commerce, governance, and human interaction. This involves tackling real-world challenges that come with scaling blockchain technology, without compromising on its core principles: decentralization, security and transparency.

At the center of this vision is our people. Our team is made up of thinkers and doers that embrace new challenges and seek solutions that push existing boundaries. If you’re energized by solving unprecedented problems, and believe in the role that decentralized systems will play in creating a more equitable digital future, then we want to hear from you.

Why Offchain?

Offchain is setting the pace for the entire Ethereum ecosystem. We built the Arbitrum stack that powers Arbitrum One, the most widely adopted Ethereum scaling solution that exists today.

Arbitrum’s ecosystem is undergoing tremendous growth with hundreds of projects and dApps on Arbitrum One today. Over 100 different teams have used Offchain technology to build their own Arbitrum chains. Major players in the space, Robinhood, Black Rock, Ethena Labs, Securitize, Aave, and Apechain are all using the Arbitrum stack.

Arbitrum’s thriving ecosystem wouldn’t exist without our advanced technology stack. Arbitrum, Prysm, Zero Dev. These aren’t just product names. These are tools that are actively reshaping what's possible on Ethereum and advancing its core infrastructure.

To top it all off? We’re backed by $124 million in funding. We’ve demonstrated consistent execution with billions in secured value, thousands of supported projects, and infrastructure processing millions of transactions seamlessly.

• Work on the core infrastructure powering Arbitrum, the leading Ethereum scaling solution (20%).
• Tackle complex distributed systems challenges, optimize performance, and contribute to the security and scalability of Arbitrum (10%).
• Collaborate closely with research, product, and blockchain engineering teams, working at the cutting edge of blockchain technology alongside world-class engineers, including many industry leaders (10%).
• Provide ongoing technical support and engineering guidance to clients and internal stakeholders by diagnosing and resolving core platform engineering issues related to the company’s infrastructure and distributed systems (10%).
• Maintain the Nitro Testnode product, a development tool used by users to run local Arbitrum nodes, including implementing enhancements, troubleshooting issues, and ensuring reliability and usability for developers (10%).
• Conduct peer code reviews for engineering contributions to ensure code quality, architectural consistency, and adherence to software engineering best practices across the platform (15%).
• Establish and evangelize backend architectural standards, selection of tech stacks, and engineering best practices (5%).
• Design high-performance compiler pipelines and extensible SDK frameworks (10%).
• Work in collaboration with Security to resolve complex security issues and identify potential threats and vulnerabilities in code in distributed systems environments (5%).
• Drive the technical roadmap with the Product team for complex distributed systems and data modeling, overseeing the integration of multiple microservices, ensuring database scalability and integrity under high load, and designing "API-first" strategies that ensure longterm system interoperability (5%).

• Bachelor’s degree or U.S. equivalent in Computer Science, Cybersecurity, Computer…