Security Architect

Stack

Responsibilities

• ▹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

Requirements

• ▹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 have

• ▹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

Soft skills

About the company

Blockstream was founded in 2014 by Dr. Adam Back and a group of cryptographers and engineers. It develops Bitcoin self-custody solutions, Bitcoin-based financial products, second-layer scaling technologies and enterprise-grade blockchain infrastructure.