Staff Software Engineer (Messaging Protocol)

Overview

Job Description

Responsibilities

• - Design, build, and maintain XMTP, our E2EE messaging protocol
• - Extending our encrypted group chat protocol to work for 1:1 conversations
• - Determining how to share user state between devices in a privacy-preserving way
• - Designing a protocol to share whether or not a message was sent by a given user with third party servers in a trust-minimized way
• - Collaborate closely with other engineers, developers, and stakeholders to help our small team build with confidence and deliver with velocity
• - Engage in open-source communities and events, representing Ephemera effectively in public forums
• - Evaluate and recommend trade-offs in our development plans and system design, considering factors such as security, scalability, efficiency, and cost

Required Skills

• - Minimum of 10+ years of professional experience as a software engineer, staff level
• - Expertise in Rust and at least one of the following: Kotlin, Swift, C++
• - Extensive experience designing, developing, and maintaining communication protocols with an emphasis on performance, scalability, and security
• - Understanding of encryption algorithms (e.g., AES, RSA), key exchange protocols (e.g., Diffie-Hellman), and secure messaging protocols (e.g., Signal Protocol, PGP)
• - A proven aptitude for adversarial systems design, including identifying and mitigating potential security risks
• - Prior involvement in open-source SDK projects and public communications

Benefits

• - Competitive compensation package, Base + Equity
• - Salary range between $200k-$250k base range (depending on experience + location)
• - Remote-first environment with semi-yearly gatherings to connect IRL
• - Fully paid Medical, Dental, Vision insurance in the US
• - Parental Leave
• - IT Equipment and WFH setup
• - Monthly Wellness and Lifestyle stipend
• - Personal assistant
• - Unlimited time off