Senior Smart Contract Engineer

About Gnosis & Circles

Circles is a decentralised web of trust based social currency system issued on Gnosis Chain. The Circles tech stack is developed by Gnosis, an Ethereum infrastructure company that has built popular applications such as Gnosis Safe, Cowswap and the Zodiac suite of DAO tooling. Gnosis Chain is the product of the merger of Gnosis and xDai. As one of Ethereum's earliest sidechains, Gnosis Chain has quiet but significant real world usage and has embarked on an aggressive technical roadmap with the objective of accelerating Ethereum. Gnosis Chain is also where Ethereum's colourful and quirky spirit lives on, as the original home that incubated many defining projects like POAP, Burner Wallet, Dark Forest, and Perpetual Protocol.

About the role

As a Senior Smart Contracts Engineer at Circles, you will leverage your extensive blockchain development expertise to design, implement, and optimise the core smart contracts that power the Circles protocol. Playing a crucial role in the development of our decentralised financial infrastructure, you will ensure the security, efficiency, and scalability of our smart contract ecosystem.

• Smart Contract Development:
  • Design and implement robust, gas-efficient smart contracts for the Circles protocol on the Gnosis Chain.
  • Develop and maintain core functionalities such as personal currency issuance, trust networks, and demurrage mechanisms.
  • Collaborate with the full-stack team to ensure seamless integration between smart contracts and front-end applications.
  • Utilise Solidity and other relevant languages/frameworks for Ethereum-compatible blockchains.
• Security & Optimisation:
  • Implement best practices to safeguard user funds and protocol integrity.
  • Optimise gas usage and implement efficient on-chain data structures.
  • Develop and maintain comprehensive test suites, including unit tests and integration tests for smart contracts.
  • Stay informed about the latest security vulnerabilities and implement necessary patches or upgrades.
• Research & Innovation:
  • Research and propose innovative solutions to enhance the Circles protocol, focusing on scalability and user experience.
  • Explore layer 2 solutions and other scaling technologies to improve the efficiency of the Circles ecosystem.
  • Collaborate with the product team to translate complex economic models into functional smart contract systems.
  • Contribute to the broader blockchain community through open-source contributions and knowledge sharing.
• Passionate about blockchain technology and its potential for creating fair and social economic systems.
• Extensive experience in smart contract development, with a strong focus on Solidity and Ethereum-compatible chains.
• Deep understanding of blockchain concepts, cryptography, and decentralised finance (DeFi) principles.
• Proven track record of developing, auditing, and deploying secure and efficient smart contracts.
• Strong problem-solving skills and ability to think creatively about complex economic and technical challenges.
• Experience with development tools such as Truffle, Hardhat, or Foundry.
• Familiarity with smart contract security techniques such as static/dynamic analysis and fuzzing; interest in learning advanced methods.
• Knowledge of or willingness to explore formal methods and verification tools for smart contracts is a plus.
• Excellent communication skills, able to explain complex technical concepts to both technical and non-technical team members.
• Proficient in English with strong written and verbal communication skills.
• Personal Development: Pursue your professional goals with our support, including personal education budgets and conference allowances. We invest in your growth and learning.
• Innovation and Experimentation: Interested in exploring new ideas? Dedicate your Friday afternoons to research or work on a side project within our ecosystem. We encourage creativity and experimentation.
• Flat Hierarchy: Navigate with ease in our organization. Our flat hierarchy ensures your ideas and contributions are valued and heard, without getting lost in a complex structure.
• Flexible and Remote Work: Not a morning person? No problem! We embrace flexible working schedules and have a long-standing culture of remote work. Balance your professional and personal life in a way that works for you.
• State-of-the-Art Equipment: Receive the latest hardware and all the tools you need. We make sure you're well-equipped to do your best work.
• Growth and Opportunity: Grow with us in an exciting industry. As Gnosis rapidly expands, so do the opportunities for you to make a significant impact. We value initiative and a proactive approach.
• Inclusive and Diverse Culture: At Gnosis, we are committed to creating an inclusive environment that celebrates diversity. We believe our products and services are enhanced by a wide range of perspectives. All qualified applicants will receive consideration for employment without regard to race, ethnic origin, age, religion, belief, marital status, gender identification, sexual orientation, or physical ability.
• Community and Mission: Join a team that's passionate about our mission and enjoys working together. We’re not just colleagues; we’re a community driven by a shared goal. How to Apply: Submit your resume in English and join us on this exciting journey. We are eager to see what you bring to the table and how you can contribute to our dynamic team.
  At Gnosis, we don’t just offer jobs, we offer journeys. Be a part of our mission to innovate and shape the future.

At Gnosis, we strive to create an inclusive environment that empowers our employees. We believe that our products and services benefit from our diverse backgrounds and experiences and are proud to be an equal opportunity employer: all qualified applicants are considered for positions regardless of race, ethnic origin, age, religion or belief, marital status, gender identification, sexual orientation, or physical ability.