Senior Backend Engineer

Arbitrum; Northern (KY); Hybrid; USD 140,000 - 190,000; Full time

Benefits offered by this job

Remote-first global workforce

Professional reimbursement program

Medical, dental & vision coverage

401k retirement plan + company match

Wellness stipend

Home office setup / ergonomic program

Job summary

Offchain, behind the Arbitrum stack, is seeking a skilled backend engineer to tackle distributed systems challenges and optimize performance for the leading Ethereum scaling solution. You will work with research, product, and blockchain engineering to strengthen security and scalability.

Ideal candidates will have production experience in Go, C++, or Rust, show strong ownership, and stay current with new technologies while collaborating openly with teammates.

Qualifications

• Proven production experience with a language that supports concurrency (Go, C++, Rust).
• Strong ownership mentality and drive to solve complex problems through experimentation.
• Comfort with new technologies and quick learning.

Responsibilities

• Work on core infrastructure powering Arbitrum and tackle distributed systems challenges.
• Collaborate with research, product, and blockchain engineering teams to improve performance and security.

Skills

Go

C++

Rust

Concurrency

Tools

WebAssembly

Job description

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, BlackRock, 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, ZeroDev. 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.

The Role:

• As part of the Nitro Backend team at Offchain, you will work on the core infrastructure powering Arbitrum, the leading Ethereum scaling solution. In this role, you’ll tackle complex distributed systems challenges, optimize performance, and contribute to the security and scalability of Arbitrum. You’ll collaborate closely with our research, product, and blockchain engineering teams, working at the cutting edge of blockchain technology alongside world‑class engineers, including many industry leaders

Who you are:

• Possess extensive production experience with a programming language that supports concurrency (e.g. Go, C++, or Rust)
• Possess a strong sense of ownership in your work which drives you to find new and innovative ways to solve complex problems through rigorous experimentation
• Always up to speed on the latest technologies
• Possess an open, transparent and direct communication style and have experience working in tight collaboration with your teammates
• Always open to feedback, new ideas and opportunities for self‑improvement
• You look for ways to help out beyond your immediate day‑to‑day work

What you've done:

• Made significant contributions to the products you’ve worked on in your career
• Maintained a security focused mindset, always keeping an eye out for potential threats and vulnerabilities in your code

Nice to have:

• Familiarity with WebAssembly, particularly writing high performant and high security code in production environments
• Passion for, curiosity about, or experience working with Blockchain technology
• Experience working with compilers, architecting systems and developing SDKs

Perks:

• Remote-first global workforce + NY office
• Professional reimbursement program (facilitates industry conference attendance, certifications, and more)
• Medical, dental & vision coverage (US + some other countries)
• 401k retirement plan + company match (US only)
• Wellness stipend
• Home office set up / ergonomic equipment program

Attention Offchain Job Seekers:

This role cannot be performed in California, or Colorado.

At Offchain, we are committed to building a welcoming and supportive workplace for all employees, regardless of their background or identity. We strive to create an environment where everyone feels valued and has an equal opportunity to succeed and thrive. We encourage candidates from all walks of life to apply and join our team.

We may use artificial intelligence (AI) tools to support parts of the hiring process, such as reviewing applications, analyzing resumes, or assessing responses and identifying potential inconsistencies or verification signals in application materials based on available information. These tools assist our recruitment team but do not replace human judgment. Final hiring decisions are ultimately made by humans. If you would like more information about how your data is processed, please contact us.