About Us

Red Cell Partners is an incubation firm building and investing in rapidly scalable technology-led companies in healthcare, cyber, and national security. United by a shared sense of duty and belief in innovation, Red Cell develops powerful tools to address our Nation’s most pressing problems.

About DEFCON AI

DEFCON AI is a modeling, simulation, and analysis (MS&A) company providing cutting-edge technology solutions for operationally relevant insights in logistics and mobility decision-making. Our AI-driven software incorporates intelligent agents within simulation environments, redefining how logistics disruptions are managed.

We are a mission-focused team of AI engineers, mobility and logistics experts, and business leaders leveraging big data and advanced technology to prepare partners for contested mobility challenges.

About the Role

We’re hiring a Senior Full Stack Software Engineer to design, build, and scale modern web applications end-to-end. You’ll work across frontend UI, backend services, APIs, asynchronous processing, and data layers—shipping features that are reliable, secure, and built to last.

This is a senior individual contributor role with autonomy and impact. You’ll own features end-to-end, influence technical decisions, and set quality standards in a remote-first environment.

Core Tech Stack

Frontend: React 19, TypeScript, Vite, Tailwind CSS, SignalR
Backend: .NET 9 (C#), Minimal APIs, Entity Framework Core
Async Processing: RabbitMQ, Redis
Data & Storage: PostgreSQL, Amazon S3

What You’ll Do

Shape product architecture end-to-end with modular .NET services and modern React frontends
Design high-performance PostgreSQL schemas and EF Core queries for business logic and RBAC
Engineer caching layers with Redis and leverage S3 for large artifacts
Drive technical direction through RFCs, defining data contracts and API boundaries
Collaborate with product and design to deliver thoughtful solutions in iterative releases
Use AI tools (Claude Code, GitHub Copilot, Cursor) responsibly to accelerate development
Maintain high-quality standards through code reviews, automated testing, and best practices

What We’re Looking For (Required)

Production experience with hash-chained audit, Merkle-tree sealing, and cross-language evidence parity (C# + Python)
Depth in cryptographic evidence pipelines (HMAC integrity, signed checkpoints, chain continuity verification)
Fluency in PostgreSQL transactional guarantees for audit writes and advisory-lock coordination
Prior work on ATO-evidence-bearing audit implementations (DoW, fintech, HIPAA-equivalent scale)
Ability to architect AWS KMS integration with envelope encryption; HSM (PKCS#11) familiarity

Nice to Have

Prior DoW/federal ATO submission experience
NIST SP 800-53 AU family control implementation
Experience with CDS integrations and ISSE approval workflows (Radiant Mercury, EverFox, Forcepoint WebShield)

Other Qualifications

Strong analytical and problem-solving aptitude
Effective communication skills to distill technical complexities
Resilience and adaptability in fast-paced environments
Hands-on agile methodology experience
6+ years of relevant experience (formal CS education a plus, but not required)
Commitment to continuous learning and skill development

What We Offer

Fully remote, results-based environment
Competitive salary ($155,000–$215,000), bonus, and equity package
100% employer-paid health insurance (medical, dental, vision) for you and your family
Unlimited PTO with manager approval
Flexible work environment
14 weeks fully-paid parental leave

Equal Opportunity

Red Cell Partners is an Equal Opportunity Employer. Employment decisions are based on merit, qualifications, and business needs. We prohibit discrimination based on race, sex, color, religion, sexual orientation, gender identity, national origin, veteran status, or disability.

This role is ideal for an engineer who thrives at the intersection of full-stack development, cryptographic audit systems, and mission-critical national security applications.

Senior Full Stack Software Engineer