Security Engineer, Product Security

Chainlink Labs; Brasil; Remote; BRL 180,000 - 240,000; Full time

Job summary

Chainlink Labs is seeking a Product Security Engineer to strengthen the security of its products. You will combine hands-on software engineering with vulnerability assessment, contributing to secure design decisions across development teams.

You will work with the Product Security team to deliver robust security-focused solutions, review architectures, and implement hardened code patterns suitable for Web3 and enterprise-grade blockchain systems.

Qualifications

• Demonstrated software development experience in production code.
• Hands-on programming in Rust or Go with solid problem solving.
• Experience designing, building, or implementing security systems.
• Proven track record reviewing security systems and evaluating risks.

Responsibilities

• Design, build, and maintain security systems for Chainlink products.
• Identify vulnerabilities and attack paths via technical reviews.
• Improve reliability and maintainability of security software.
• Evaluate risks and inform technical decisions to reduce exposure.
• Deliver security solutions from implementation through deployment.

Skills

Software development

Rust or Go

Security design

Security review

Job description

About Chainlink

Chainlink is the industry-standard oracle platform bringing the capital markets onchain and powering the majority of decentralized finance (DeFi). The Chainlink stack provides the essential data, interoperability, compliance, and privacy standards needed to power advanced blockchain use cases for institutional tokenized assets, lending, payments, stablecoins, and more. Since inventing decentralized oracle networks, Chainlink has enabled tens of trillions in transaction value and now secures the vast majority of DeFi.

Many of the world’s largest financial services institutions have also adopted Chainlink’s standards and infrastructure, including Swift, Euroclear, Mastercard, Fidelity International, UBS, S&P Dow Jones Indices, FTSE Russell, WisdomTree, ANZ, and top protocols such as Aave, Lido, GMX and many others. Chainlink leverages a novel fee model where offchain and onchain revenue from enterprise adoption is converted to LINK tokens and stored in a strategic Chainlink Reserve. Learn more at chain.link.

About The Role

As a Product Security Engineer, you will contribute to the security of Chainlink's products by building and reviewing security systems. This role combines hands‑on software engineering with the identification and evaluation of security risks, enabling stronger security decisions throughout development. You will work within the Product Security team to deliver reliable security-focused engineering solutions.

Your Impact

• Design, develop, and maintain security systems that strengthen the security of Chainlink's products.
• Identify security vulnerabilities and potential attack paths through systematic technical reviews of existing systems.
• Improve the reliability and maintainability of security-focused software through high-quality implementation and testing.
• Evaluate security risks and engineering tradeoffs to inform technical decisions and reduce potential vulnerabilities.
• Deliver security engineering solutions from implementation through deployment, incorporating findings from technical reviews.

Requirements

• Demonstrated software development experience, including writing, debugging, and maintaining production-quality code.
• Hands‑on programming experience in Rust or Go, with the ability to demonstrate effective implementation and problem-solving.
• Experience designing, building, or implementing security systems, with demonstrated understanding of security considerations in technical design.
• Proven experience reviewing security systems, identifying potential vulnerabilities, and evaluating technical risks.

Preferred Requirements

• A portfolio of prior engineering work, including publicly accessible code contributions or repositories demonstrating software development capability.
• Demonstrated engagement with security engineering through previous technical work, research, or security‑focused projects.
• Experience critically evaluating systems to identify security weaknesses, attack paths, and potential improvements.
• Previously developed and shipped security products, with the ability to explain implementation decisions and technical tradeoffs.
• Experience developing or reviewing systems within Web3 or blockchain environments.
• Previous ownership of large engineering projects or experience leading small technical teams.
• Hands‑on experience with security engineering for AI pipelines or AI‑based systems.

Chainlink Labs is a remote‑first organization and employment eligibility is contingent upon residing in an approved hiring jurisdiction. Team members may work outside their primary country of legal residence for a maximum of 90 days per calendar year. Please discuss your current location, legal residence, and work authorization with your recruiter during your initial conversation. Unless otherwise stated for a specific role, we require working hours that overlap with Eastern Time (ET).

We carefully review all applications and aim to provide a response to every candidate within two weeks after the job posting closes. The closing date is listed on the job advert, so we encourage you to take the time to thoughtfully prepare your application. We want to fully consider your experience and skills, and you will hear from us regarding the status of your application shortly after the closing date.

Commitment to Equal Opportunity

Chainlink Labs is an equal opportunity employer. All qualified applicants will receive equal consideration for employment in compliance with applicable laws, regulations, or ordinances. If you need assistance or accommodation due to a disability or special need when applying for a role or in our recruitment process, please contact us via this form.

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