Position: Security Engineer - Crypto Custody
Company: 4irelabs
Experience required: 3y
English level: upper

4ire labs is looking for a skilled Security Engineer

**Requirements:**
● Experience auditing (internally/externally) DeFi systems, from both technical and economical points of view;
● Hands-on experience with formal verification tools;
● Ability to write high-quality security reports, private and public;
● Interest on Ethereum research and edge advancement on the ecosystem;
● Solid understanding and proficiency of Javascript/Typescript and/or Python;
● Good cryptography primitives knowledge;
● Participation on core Ethereum development, including but not limited to 
contribution to EIPs;
● Production experience developing a DeFi protocol;
● Knowledge of Ethereum nodes implementation like Geth;
● Solid understanding/experience with non-EVM blockchains or paradigms (e.g. Polkadot, Solana).

**Responsibilities:**
● Research new crypto assets and integrate them into the planned custody 
system;
● Maintain our custody system and its integrations with various blockchains as each blockchain evolves;
● Develop novel security solutions to safeguard our clients assets;
● Delve into novel emerging technologies such as Multi-Party Computation (MPC5 and MPC6);
● Actively participate in the development of custody related systems, the scaling and growth of the team, and the ultimate direction of crypto custody;
● Work cross functionally with the crypto asset team on new assets;
● Remain security, detail, and quality focused above all other concerns;
● Focus on developing end to end test frameworks that use little to no mocks;
● Able to reason about and build threat models when developing software.

**Working conditions:**
● 100% remote;
● Competitive compensation linked to USD rate;
● Flexible working hours in the European time zone;
● Team that is always ready to help;
● Opportunities for professional and personal growth;
● Paid vacation and sick leaves.