AI-Driven .Net Software Engineer (Security Clearance Required)

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Block 3 is a dynamic organization committed to leveraging data to drive innovation and growth. We are seeking a highly skilled and cleared Full Stack .Net Developer with robust development knowledge to join our growing team in Northern Virginia/Washington Metro area. This individual will be responsible for being on a small software team transforming counter-intelligence data into a unified and predictive enterprise that will keep the US ahead of our adversaries.

More about Block 3 :

Our mission is to advance defense cybersecurity and counterintelligence (CI) through a culture of relentless innovation, teamwork, and mission-driven excellence. Our team is built around professionals from Special Operations, Intelligence, and Cyber Warfare communities and we specialize in advanced adversary defeat, managed detection and response, cyber threat intelligence, and operational technology security. Our culture is defined by intellectual curiosity and collaboration, uniting data scientists, AI experts, and CI specialists in a dynamic environment that pursues bold ideas and rapid innovation. We foster a workplace where employees are empowered to challenge conventions, driving advancements in proactive threat prevention that keep pace with sophisticated attacks. This has produced software like AxIS, the first commercially available counterintelligence mission management solution that incorporates AI at all stages of the CI lifecycle from collections to operations.

Full Stack Developer

• Clearance: Active Top Secret Security Clearance and US Citizenship required
• Location: Northern Virginia with likely remote opportunities
• Salary Range: $125,000+
• Experience: 2+ Years

General : Need someone to join a fast-moving team developing first of its kind commercial software product. Our product - Advanced Intelligence System - Counterintelligence (AxIS) - is critical for national security against advanced cyber adversaries like China. You will join a start-up environment where you are empowered to make quick decisions that push the envelope. Must love the mission and the idea of creating something that's new and elite. Must not be afraid to speak up or to take chances, and are foremost a great teammate. Big plus : Able to show outstanding AI/data work in side projects you are passionate about.

Responsibilities:

• Design, develop, and integrate generative & cognitive AI capabilities (e.g., LLMs, diffusion models) into web-based mission management platforms to enhance user experience and operational effectiveness.
• Architect AI-driven features that synthesize and contextualize data from multiple sources, enabling intelligent decision support and real-time situational awareness.
• Develop algorithms and pipelines to correlate structured and unstructured data, extracting actionable insights and generating contextual outputs for users.
• Collaborate with frontend and backend development teams to seamlessly embed AI functionalities into existing and new web application workflows.
• Evaluate and fine-tune AI models to meet performance, accuracy, and latency requirements within secure and operationally constrained environments.
• Stay current with advancements in generative & cognitive AI, machine learning, and data fusion technologies to continuously evolve system capabilities.

Benefits :

• 401(k) matching
• Dental insurance
• Flexible schedule
• Health insurance
• Health Savings Account (HSA)
• Life insurance
• Paid time off
• Parental leave
• Professional development assistance
• Referral program
• Retirement plan
• Vision insurance

Job Type: Full-time

Pay: $125,000.00 - $150,000.00 per year

Benefits:

• 401(k)
• 401(k) matching
• Dental insurance
• Health insurance
• Life insurance
• Paid time off
• Vision insurance

Schedule:

• 8 hour shift

People with a criminal record are encouraged to apply

Work Location: Hybrid remote in Clifton, VA 20124