Platform Software Engineer

About the role

You will design and integrate the core telecommunications infrastructure that delivers secure cellular service to our users, ensuring end-to-end data integrity across every layer of the stack. You will own the full lifecycle of foundational components, from problem discovery and requirements gathering through solution delivery, deployment, and ongoing maintenance. You will set and enforce high coding standards by writing guidelines, conducting code reviews, and fostering a culture of continuous improvement and knowledge sharing across the team. You will enable scale by building reliable, performant, and scalable systems that allow product teams to ship robust applications without needing deep expertise in telecom infrastructure. You will take ownership of systems that detect and prevent spam and smishing campaigns while identifying and mitigating malicious signaling attacks that threaten user privacy. You will build and maintain the signaling firewall and other security primitives that protect the network from exploitation and abuse. You will implement detection for fake base stations, also known as cell-site simulators, to safeguard our users from unauthorized surveillance. You will design robust APIs and primitives that abstract complexity so other engineers can deliver impactful features quickly and safely. You will work cross-functionally with product, security, and infrastructure teams to solve ambiguous, high-stakes problems that have direct impact on national security, journalists, parents, and everyday users who value privacy.

Key facts

What you'll do

• Design and integrate core telecommunications infrastructure to provide secure cellular service and ensure end-to-end data integrity.
• Own the complete software lifecycle for foundational stack components, including discovery, design, implementation, testing, and maintenance.
• Develop and maintain guidelines and participate in code reviews to uphold high coding standards and enable knowledge sharing.
• Build reliable, performant, and scalable systems that enable other product teams to ship features without deep telecom expertise.
• Build and maintain a signaling firewall to identify and mitigate malicious signaling attacks that compromise user privacy.
• Detect and prevent spam and smishing campaigns across the network and user devices.
• Detect fake base stations (cell-site simulators) and build mechanisms to alert users and protect communications.
• Design and deliver robust APIs and primitives that abstract infrastructure complexity for rapid and safe product development.
• Collaborate with security and infrastructure teams to solve ambiguous, high-impact problems in a rapidly evolving environment.
• Contribute to mission-critical features that protect national security professionals, journalists, parents, and privacy-conscious users.
• Implement monitoring and alerting systems that notify users when they may be targeted by hackers or nation-state actors.
• Work cross-functionally to align platform capabilities with product goals, privacy requirements, and regulatory constraints.
• Optimize systems for resiliency, availability, and performance under real-world network conditions.
• Document architectures, interfaces, and operational procedures to ensure maintainability and onboarding efficiency.
• Participate in on-call rotations to support production systems and respond to incidents quickly.
• Drive technical discovery and prototyping to validate new privacy and security approaches at scale.

Requirements

• You hold a Bachelor's or Master's degree in Computer Science, Engineering, or a related technical field, or have equivalent practical experience.
• You have 3+ years of professional software engineering experience building and operating production systems.
• You are proficient in at least one modern systems or high-level programming language such as Go, Rust, Python, or Java.
• You have hands-on experience with networking protocols including TCP, UDP, DNS, TLS, and core cellular protocols.
• You understand secure systems design, cryptography fundamentals, and privacy-preserving architectures.
• You have experience building or operating distributed systems, microservices, or cloud-native platforms.
• You are comfortable working with databases, caching layers, and message queues in high-throughput environments.
• You have a strong grasp of software development practices including testing, debugging, logging, and observability.
• You can read and interpret technical specifications, RFCs, and standards documents relevant to telecom and security.
• You are able to obtain the necessary security clearances or complete background checks as required for access to sensitive infrastructure.
• You are authorized to work in the United States and do not require sponsorship for the position at this time.
• You can demonstrate experience collaborating with cross-functional teams in fast-paced, mission-critical environments.
• You have a strong commitment to ethical engineering, user privacy, and responsible disclosure practices.
• You are comfortable learning new technologies and adapting to evolving priorities in a dynamic startup environment.
• You communicate clearly and constructively with both technical and non-technical stakeholders.
• You are comfortable working asynchronously across time zones while remaining responsive during critical incidents.

Practical notes

Hours

Full-time based in New York, NY.

Travel

No travel requirements specified.

Visa

Candidates must be authorized to work in the United States and do not require sponsorship at this time.

Deadlines

No application deadline specified. Apply as soon as possible to be considered.