Backend Engineer • Senior

Who you are

5+ years of backend engineering experience with a focus on authentication systems — you've designed and implemented secure authentication solutions that protect user accounts and data integrity. Your expertise in security engineering ensures that you understand the nuances of multi-factor authentication and key management.

Deep knowledge of modern programming languages such as Java and Python — you've built scalable backend services and are comfortable working with REST APIs to integrate various systems. Your experience with security protocols like OAuth and WebAuthn allows you to create robust authentication flows.

You have a strong understanding of threat modeling and secure coding practices — you can identify potential vulnerabilities in systems and proactively address them. Your ability to work collaboratively with product teams ensures that security is a foundational aspect of every project.

Experience with secrets management technologies — you've implemented solutions that enhance security while maintaining functionality. You understand the importance of managing sensitive information and have worked with tools that facilitate secure storage and access.

You are a proactive problem solver who thrives in a fast-paced environment — you enjoy tackling complex challenges and are committed to continuous improvement in security practices. Your communication skills enable you to articulate technical concepts to non-technical stakeholders effectively.

Desirable

Familiarity with blockchain technologies and the crypto ecosystem — you have an interest in how decentralized systems operate and the security implications they present. Experience with cloud platforms like AWS or Azure is a plus, as it allows you to leverage cloud-native security features in your solutions.

What you'll do

Join Phantom's engineering team and take ownership of the core authentication infrastructure that secures every user account. You will lead the design and implementation of production-grade improvements to the Auth stack, ensuring that it meets the highest security standards. Your work will directly reduce account-takeover risks and empower product teams with reliable identity foundations.

Architect and ship enhancements to the authentication systems, including secure enclaves and hardened token flows. You will collaborate with cross-functional teams to define and implement multi-factor authentication methods that enhance user security without compromising user experience.

Design and build systems using modern secrets management technologies to push security and functionality to the next level. You will ensure that sensitive information is handled securely and that access controls are enforced rigorously.

Define and integrate APIs that facilitate seamless interactions between the authentication systems and other components of the Phantom platform. Your expertise will help create a unified experience for users managing their accounts and tokens across various blockchain networks.

What we offer

Phantom provides a dynamic work environment where innovation is encouraged. You will have the opportunity to work on cutting-edge technologies that are shaping the future of the crypto ecosystem. We value collaboration and support professional growth through mentorship and continuous learning opportunities.

Our team is passionate about creating a secure and user-friendly experience for millions of users. You will play a crucial role in enhancing the security of our self-custodial wallet, contributing to a product that is already a leader in the finance category on the Google Play Store.

We offer competitive compensation and benefits, including flexible work arrangements that allow you to balance your professional and personal life. Join us in revolutionizing the way people interact with the crypto ecosystem and make a meaningful impact in the industry.