Security Architect

Blockstream was founded in 2014 by Dr. Adam Back and a group of fellow cryptographers and engineers who are passionate about Bitcoin and its potential to change the world. Today, Blockstream is the leading Bitcoin company, providing cutting-edge infrastructure solutions for enterprises, institutions, and individual Bitcoin users. We develop industry-leading Bitcoin self-custody solutions, Bitcoin-based financial products, second-layer scaling technologies, and enterprise-grade blockchain infrastructure.

### What You’ll Be Doing - Define and drive security architecture across applications, services, and infrastructure. - Partner with engineering teams to design and implement secure software systems, focusing on backend and data security. - Conduct threat modeling, risk assessments, and security reviews for new and existing products. - Develop and enforce secure coding practices, frameworks, and review processes. - Collaborate with DevOps on cloud and container security, CI/CD hardening, and access controls. - Evaluate and integrate security tools for code scanning, vulnerability management, and incident response. - Guide and mentor engineers on best practices for secure application development. - Stay ahead of emerging security trends, compliance standards, and attack vectors — particularly in fintech and blockchain domains.

### What We Look For in You (Required Qualifications) - 10+ years of experience in software engineering or security architecture roles. - Strong full-stack background with deep backend security expertise (Python, Go, C/C++, Rust, or similar languages). - Demonstrated experience designing and securing systems for enterprise fintech, banking, or blockchain environments. - Knowledge of cryptography, authentication, and key management. - Hands-on experience with cloud security (AWS, GCP, or similar). - Familiarity with threat modeling, secure SDLC, and modern application security frameworks (OWASP, NIST, ISO 27001). - Excellent communication skills — able to clearly articulate risks and solutions to both technical and non-technical stakeholders.

### Nice To Haves (Preferred Qualifications) - Experience with Bitcoin, Lightning, or blockchain protocols. - Contributions to open-source security tools or projects. - Security certifications (CISSP, OSCP, CEH, or equivalent) are a plus but not required.

Blockstream is a Bitcoin and digital asset infrastructure company founded in 2014 that provides custody, treasury, and tokenization solutions. The company operates the Liquid Network, a Bitcoin sidechain, and offers products including hardware wallets, wallet applications, and enterprise-grade tools for managing digital assets.