Senior Security Engineer - Bitcoin/Lightning

Lightning Labs; Portugal; Remote; EUR 70,000 - 110,000; Full time

Job summary

Lightning Labs in Portugal is seeking a Security Engineer to scale our security program across web, Bitcoin, and Lightning Network services. This hands-on role will devise and implement policies, standards, and procedures to ensure robust security across platforms.

You will conduct security audits, design testing infrastructures (fuzzing, pentest tooling), review code for vulnerabilities, and mentor teammates. Remote collaboration with international teams is required.

Qualifications

• Minimum 5 years in systems security or equivalent.
• Experience working with distributed/multi-site teams.
• Strong cryptography, protocol design and adversarial analysis knowledge.
• Experience in reverse engineering and cryptographic protocol assessment (e.g., cryptocurrencies).
• Proficient in secure development lifecycle and code review processes.

Responsibilities

• Design and implement security testing infrastructure (fuzzing, penetration testing, both automated and manual).
• Perform security audits of internal systems and open-source software interacting with Bitcoin/Lightning.
• Develop and enforce security policies, standards, and procedures.
• Oversee security aspects of release processes and infrastructure.
• Lead risk assessments and security incident response processes.

Skills

Security policy & standards

Penetration testing

Incident response

Threat modeling

Cryptography knowledge

Team mentorship

Remote collaboration

Tools

Go

Rust

C/C++

Java

Job description

Lightning Labs in Portugal is seeking a Security Engineer to scale our security program across web, Bitcoin, and Lightning Network services. This hands-on role will devise and implement policies, standards, and procedures to ensure robust security across platforms.

You will conduct security audits, design testing infrastructures (fuzzing, pentest tooling), review code for vulnerabilities, and mentor teammates. Remote collaboration with international teams is required.