Two Six Technologies · 1 hour ago
Principal Software Engineer
Arlington, VA
Full-time
Hybrid
Lead/Staff
$179K/yr - $269K/yr
10+ years expTwo Six Technologies is seeking an experienced Principal Software Engineer to work on multi-domain platforms serving critical national security functions using cutting-edge modern frameworks. The role involves driving technical strategy for distributed systems, managing developers, and enhancing operational efficiency while leading a team of engineers.
Cyber SecurityInformation TechnologyNetwork Security
No H1B
Security Clearance RequiredU.S. Citizen Only
Responsibilities
Drive the end-to-end technical strategy for distributed systems, from architecture and framework selection to implementation and optimization, while leading engineers and enforcing engineering best practices
Partner with technical leadership to improve developer ergonomics, software quality, and security and help enforce engineering policy
Enhance operational efficiency by improving processes, implementing scalable solutions, and effectively managing expectations through adept change management
Brief technical and programmatic designs, roadmaps, and accomplishments to internal and external audiences
Design and implement complex platform architectures including, but not limited to, distributed or decentralized topologies, scalable and efficient data fabric, APIs, message queuing and event streaming, secure authentication and authorization, and containerization and orchestration
Manage developers to deliver capabilities and integrations according to business strategy
Play a key role in hiring and mentoring more junior engineers and helping align tasks with their career goals
Qualification
Required
Bachelor's degree in Computer Science, Engineering, or related field and 10+ years in professional software engineering, with at least 5+ years in a systems, platform, or infrastructure leadership role. In lieu of degree, comparable experience will be considered
Expert level proficiency in one or more prominent languages, such as C/C++, Go, Rust, Python, Java, etc. and the ability to flexibly work across languages as dictated by program requirements
Proven experience designing and implementing distributed systems including CAP trade-offs, synchronization strategies, distributed messaging models, and partition tolerance
Experience with secure systems design, including public key cryptography, certificate based authentication (mTLS, etc), trust boundaries, and threat modeling
Ability to lead a program's architecture and technical direction, including writing and defending design documents, making principled tradeoffs under ambiguity, and mentorship of senior and mid-level engineers
Eligibility and willingness to obtain and maintain a government security clearance up to TS/SCI
Preferred
Experience using Git and Jira in a development workflow
Experience with peer-to-peer decentralized technologies such as libp2p and distributed hash tables
Experience with relational database design and developing applications using Postgres, SQLite, etc
Experience with Pub/Sub messaging systems and distributed logs (Kafka, NATS, etc.)
Active TS government security clearance with SCI eligibility
Company
Two Six Technologies
Two Six Technologies provides cybersecurity and technology solutions for national security customers.
501-1000 employees
Funding
Current Stage
Late StageTotal Funding
$54.56M2026-01-05Series Unknown· $10M
2024-01-30Series Unknown· $2.2M
2023-10-16Series Unknown· $8.73M
Leadership Team
Bob Kwaja
Chief Financial Officer
Richard Housley
Chief Scientist, Reverse Engineering
Recent News
Bizjournals.com Feed (2025-11-12 15:43:17)
2026-01-11
Two Six Technologies
2025-10-28
Two Six Technologies
2025-09-15
Company data provided by crunchbase