Senior AWS Penetration Tester | Blockchain Security

Offchain; København; Remote; DKK 900,000 - 1,300,000; Full time

Benefits offered by this job

Remote-first global workforce + NY off

Professional reimbursement program

Medical, dental & vision coverage

401k retirement plan + company match

Wellness stipend

Home office setup / ergonomic program

Job summary

Offchain is pioneering in blockchain scalability and security, building the Arbitrum stack and supporting Ethereum ecosystem growth. As a Senior Security Engineer, you will simulate attacker techniques, perform code audits, and drive offensive security initiatives to protect infrastructure and compliance programs such as SOC 2.

You will conduct code reviews, penetration tests across cloud environments (AWS), collaborate with detection/IR teams, and lead offensive security projects while

Qualifications

• 5+ years in offensive security, penetration testing, red teaming, or related field.
• Experience with code audits to identify and remediate security issues.
• Strong knowledge of AWS and attack techniques.

Responsibilities

• Emulate real-world tactics to surface vulnerabilities across infrastructure and ecosystem tools.
• Run hands-on tests, lead red team exercises, and strengthen detection and response capabilities.
• Shape design, launch, and protection of infrastructure powering millions of users and applications.

Skills

Offensive security

Penetration testing

Red teaming

Code audits

AWS expertise

MITRE ATT&CK

Web app security

Python/Go

Communication

Attacker mindset

Tools

Burp Suite

Nuclei

Automation frameworks

Job description

Offchain is pioneering in blockchain scalability and security, building the Arbitrum stack and supporting Ethereum ecosystem growth. As a Senior Security Engineer, you will simulate attacker techniques, perform code audits, and drive offensive security initiatives to protect infrastructure and compliance programs such as SOC 2.

You will conduct code reviews, penetration tests across cloud environments (AWS), collaborate with detection/IR teams, and lead offensive security projects while