Senior Security Engineer - xStocks

This position is listed on behalf of a partner company, who manages all applications and next steps. Our partner is looking for a Senior Security Engineer – xStocks based in Brazil. Join a globally distributed engineering team building secure infrastructure for tokenized real-world assets and blockchain-based financial products. In this role, you will combine hands-on software engineering with offensive security, helping protect systems that manage valuable digital assets across multiple blockchain networks. You will take ownership of security initiatives from threat modeling and penetration testing to smart contract audits and incident response. Working closely with engineering, security leadership, and compliance teams, you will strengthen platform resilience while ensuring security remains central to product development. You will also contribute directly to production code, balancing security improvements with ongoing product delivery. This is an opportunity to shape security practices in a fast-evolving environment where technical excellence, sound risk judgment, and proactive ownership are essential.