Application security engineer in DeFi

RootstockLabs Ltd.; United States; Remote; USD 140,000 - 210,000; Full time

Benefits offered by this job

Remote work

Vacation and sick leave

Training programs

Job summary

RootstockLabs Ltd. is seeking a Senior Application Security Engineer to secure our Bitcoin-backed DeFi infrastructure by reviewing code, smart contracts, and protocol changes. You will build security automation and work closely with development teams on threat modeling and architecture reviews.

You will also manage the bug bounty program end to end and coordinate external security audits with third-party auditors, researching attack techniques and translating them into concrete defenses.

Qualifications

• 3+ years of experience in Application Security or Security Engineering.

Responsibilities

• Perform security reviews of source code, smart contracts, and protocol changes across RootstockLabs projects.

Skills

Application Security

Secure code review

Java

JavaScript

Python

Go

Rust

English

Security Automation

Tools

SAST

DAST

CI/CD security

Job description

Описание:

As an Senior Application Security Engineer at RootstockLabs, you will help secure our Bitcoin-secured DeFi infrastructure by reviewing code, smart contracts, and protocol changes, and by building the security automation that keeps our development lifecycle safe. You will work closely with development teams on threat modeling and architecture reviews, manage our bug bounty program end to end, and coordinate external security audits with third-party auditors. You will also research attack techniques relevant to our ecosystem (EVM, bridges, p2p) and translate them into concrete defenses, and support incident investigations when application-layer issues arise.

Задачи:

• Perform security reviews of source code, smart contracts, and protocol changes across RootstockLabs projects
• Participate in design and architecture reviews; threat-model new products and features with development teams
• Triage and validate bug bounty reports; assess severity and coordinate remediation with engineering
• Collaborate on external security audits: scope engagements and work with third-party auditors through to the resolution of findings
• Build and operate security automation, including AI-assisted code review, scanning, and findings-triage pipelines
• Research attack techniques relevant to the ecosystem (EVM, bridges, p2p) and turn findings into concrete defenses: monitoring alerts, CI security checks, and hardening changes
• Support incident investigations when application-layer issues arise

Требования:

• 3+ years of experience in Application Security or Security Engineering
• Solid grasp of common vulnerability classes (OWASP Top 10) and secure code review in Java plus at least one of TypeScript/JavaScript, Python, Go, or Rust
• Hands-on experience with blockchain security: smart contract auditing (Solidity/EVM) or protocol/node-level security
• Experience building and operating security automation, AI-assisted workflows (LLM-based triage, code review, or scanning), SAST/DAST, dependency and secret scanning, and CI/CD security gates
• Fluent English

Будет плюсом:

• Experience in bug bounty triage or vulnerability disclosure programs
• Experience mitigating network-level attacks (p2p, eclipse, DoS) or analyzing consensus-level attack scenarios
• Offensive security background (pentesting, red team, CTFs, exploit development)
• Public security research: CVEs, bug bounty track record, audit reports, conference talks
• Knowledge of C/C++ (for node/client codebases)
• Experience with fuzzing (smart contracts or native code)

Условия:

• Competitive compensation package unique benefits designed to support your growth and well-being.
• 100% Remote Work working within a Central European to Argentinian time-zone window (UTC-3 to UTC+2, with about an hour's flexibility either side), and with access to global coworking spaces.
• Paid vacation and sick leave days
• Access to training programs, language courses, and learning sponsorship annually.
• Work with cutting-edge blockchain technology in a global, diverse team.