👋 GM

We are OpenCover — our mission is to keep the world safe onchain.

OpenCover operates at the intersection of blockchain security and insurance. Working in tandem with leading underwriters and industry players, we protect individuals, businesses and institutions against onchain risks such as malicious transactions, smart contract exploits and depegs.

Founded by Y Combinator alums, our team is backed by Tier 1 investors including Alliance, Coinbase Ventures (Base Ecosystem Fund), NFX, Village Global and Orange DAO, with support from the Lloyd’s of London Lab.

Want to join a high-performance, high-integrity team taking onchain safety to the next level? Read on.

🚀 Your role

You would join the founding team to develop core backend infrastructure working closely with our CTO. Your role would focus on expanding the first transaction security layer to insure billions in value. The work involves collaborating with top protocols and industry players to prevent incidents like the ByBit hack from ever happening again.

Areas you’ll work on

• Soft auditing and semantic modelling of leading protocol designs and functions.
• Designing, implementing and backtesting transaction validation checks.
• Developing asset pricing and transaction risk models.
• Tracking exposure and other insurance metrics in real-time.
• Iterating and expanding our API based on customer feedback.
• Staying up to date with industry trends including EIPs and security incidents.

You’d be a great fit if

• You’re a generalist who quickly embraces new technologies and challenges with a passion for building products from the ground up in a collaborative, tight-knit team.
• You go all out to use your knowledge and work well autonomously but know when to reach out for support.
• You have 5+ years of full-time experience developing and shipping backend services with Node.js and TypeScript.
• You’ve designed, implemented and/or audited smart contracts on EVM-compatible chains and have hands-on experience using DeFi.
• You’re familiar with PostgreSQL, messaging brokers, AWS/GCP, Docker, Bash and Linux.
• You are constantly improving your tech stack and use AI tools to accelerate development.

🙌 Our offer

• Put your dent in the universe: build products for and with some of the largest players across Web3 and TradFi.
• Directly impact company trajectory and play a key role in driving onchain adoption.
• Work IRL with the team at Lloyd’s of London 1–5 days a week— your choice!
• Flexible hours with 28 days of paid holiday plus company closure days.
• Competitive compensation based on experience + 0.1–0.5% equity.
• The equipment you need to do your best work + $1,000 for well-being and personal development each year.
• Company-paid travel to events and conferences, if that’s your thing!

Ready to apply?

Head to opencover.com/apply/bbe and get shortlisted in 10 minutes or less.

StarkWare is at the forefront of blockchain and deep technology, creating cutting-edge solutions that scale Ethereum and Bitcoin, and unlock the potential of Web3. Our technology combines academic rigor with practical application, enabling the next generation of decentralized innovation. Join a team of the brightest minds pushing the boundaries of cryptographic proof systems and scalable blockchain infrastructure.

*This role requires travel at least twice a year for team off-sites and industry conferences.

Mission: You will play a key role in developing our iOS/Android apps, ensuring a seamless and enjoyable user experience. As part of a dynamic and collaborative team, you’ll contribute to cutting-edge projects that push the boundaries of web3 mobile technology.

Key Responsibilities:

• Develop and maintain iOS/Android applications integrated with the Starknet network, optimizing performance and responsiveness.
• Lead features from research and design to implementation and launch.
• Collaborate with distributed teams across Engineering, Product, and Ecosystem to set clear roadmaps and milestones.
• Engage with the Starknet community to develop and integrate innovative solutions.
• Write clean, maintainable, and well-tested code.
• Stay up to date with industry trends and apply best practices to improve development processes.

• For iOS: Proficiency in Swift, UIKit, and a solid understanding of iOS development best practices. TypeScript and React Native knowledge is a plus
• For Android: Proficiency in Kotlin in native Android development (Kotlin/Java). TypeScript and React Native knowledge is a plus
• A passion for developing phenomenal user experiences. 
• Ability to quickly adapt to new programming languages, tools, and environments.
• Strong ability to write efficient, testable, and maintainable code.
• Fast learner with a proactive, “get things done” mindset.

Nice to Have:

• Experience with blockchain protocols, particularly Ethereum and Starknet.
• Experience with open-source development.
• Experience with SDK Development

Apply Now: