Senior Backend Engineer

Rhinestone is building at the bleeding edge of the crypto wallet tech stack. We built the first ERC-4337-compliant Modular Smart Account, the precursor to ERC-7579. This is the dominant technical standard for Smart Accounts, which we lead and use as a foundational layer to permissionless wallet innovation and interop.

Our vision is simple:
For blockchain technology to revolutionize the digital economy, we require mass adoption, which can only happen with a drastic improvement in user experience (UX). Smart Accounts are the bedrock for solving crypto’s UX challenges, from easy ones like gas abstraction and key recovery to more complex ones like Ethereum’s fragmented liquidity.

Rhinestone provides Smart Account infrastructure and tooling, enabling developers to build powerful onchain products with web2-like UX. Our intent-powered infrastructure allows seamless onchain actions regardless of the chain the user is transacting on. Our open Smart Account module library gives developers maximum flexibility to build the wallet stack they need for their users.

We’re looking for a Senior Backend Engineer to play a foundational role in developing the offchain infrastructure for Omni Account, an intent-powered system that chain abstracts any ERC-7579 Smart Account and smart EOA (EIP-7702). The position will require experience with blockchain systems and building highly performant backend services.

You’ll play a major role in architecting and building the Orchestration Layer for our chain abstraction system. The Orchestration Layer needs to be performant, scalable, and secure, with the ability to process thousands of requests per second whilst seamlessly coordinating solvers, resource locks, claim requests, and security checks. All this complexity needs to be handled while also asking how we ensure we do this in a trustless and censorship-resistant manner.

If you are nerd-sniped by complex problems at the intersection of scalability, UX, and trustlessness, we’d love to speak with you! This is an opportunity for you to leave a mark on the broader ecosystem and become a true domain expert.

Architect and design our off-chain services to support feature growth and the rapidly changing requirements of being a startup.

While your focus will be writing concurrent backend systems, you will also interact with our smart contract systems written in Solidity.

Work closely with the team to ship new products and develop solutions for challenging technical problems.

Deliver high-quality code from concept until production.

Dive into the code of other team members to provide thorough reviews and contributions outside of your own responsibilities.

• 3+ years of relevant experience with blockchain technology (EVM-focused).
• 4+ years of experience writing Type Script in a production environment.
• Experience working with crypto wallets (preferably smart accounts), bridging technologies, blockchain nodes, relayer or intent-based systems, and an understanding of Layer 2 solutions and their integration into the application layer.
• Ability to balance shipping quickly with building a stable infrastructure.
• Self-starter, problem-solving from the root cause, able to break down complex problems into simpler components and chart the phases of getting to a stable and scalable solution.
• A hustler mentality: founding a company, working in startups (pre-series
  
  A), or building side projects (open source is a plus).
• Able to be a thought leader and highly collaborative to drive toward 10x outcomes.

• Onchain:
  Solidity (Foundry)
• Offchain backend:
  Rust, Node, Type Script, and various other JS/TS-based frameworks
• Offchain frontend:
  NextJS, Type Script, and Tailwind

London, UK

• Startup equity
• Opportunity to own complex part of tech stack end-to-end
• Flexible working hours and holidays
• Regular team meetups, offsites, and conferences
• A chance to work with the leading minds in account abstraction and in the broader web3 space

Reach out to kurt to start the application process.

Rhinestone employs a meritocratic mindset when hiring. Regardless of background, gender identity, age, religion, etc., we assess candidates by their ability to contribute, collaborate, and deliver excellent work.