Software Engineer - DC

Washington, D.C., District of Columbia, United States

As a Software Engineer
, you will build the core systems that secure end‑to‑end mobile communications. Your work will directly impact how users are protected across the communications stack—from device‑level safeguards to hardened network infrastructure.

You’ll help develop systems that detect and mitigate malicious signaling attacks, identify fake cell towers, prevent spam and smishing campaigns, and deliver transparent security protections to users. This is high‑impact engineering with real‑world consequences.

Design & Integrate: Build foundational telecommunications infrastructure that ensures secure, resilient connectivity.

Own the Lifecycle: Take end‑to‑end ownership of critical components—from design through deployment.

Raise the Bar: Contribute to high engineering standards through code reviews and best practices.

Enable Scale: Develop reliable, high‑performance systems that empower other teams to build securely and efficiently.

4+ years of professional software engineering experience

Strong foundation in Computer Science or related technical field

Fluency in Golang, Rust, Java/Kotlin, or Python

Solid understanding of algorithms, data structures, distributed systems, and cloud infrastructure

Strong written and verbal communication skills

US Citizenship (Required) / Active U.S. security clearance or eligibility

• Conduct business negotiations in Mandarin
• Maintain strong relationships with Taiwan‑based partners (50% travel)

Mission‑driven work at the intersection of privacy, security, and national resilience

Real ownership and autonomy

Fast‑moving, builder‑oriented culture

Backed by top‑tier investors

Opportunity to shape foundational infrastructure in a critical domain