Senior Full Stack Software Engineer

About Us

Red Cell Partners is an incubation firm building and investing in rapidly scalable technology-led companies that are bringing revolutionary advancements to market in three distinct practice areas: healthcare, cyber, and national security. United by a shared sense of duty and deep belief in the power of innovation, Red Cell is developing powerful tools and solutions to address our Nation’s most pressing problems.

ABOUT DEFCON AI

DEFCON AI is a modeling, simulation, and analysis (MS&A) company that provides cutting-edge technology solutions for generating operationally relevant insights for the next generation of logistics and mobility decision making. An AI- driven software incorporating an intelligent agent within a simulation environment — DEFCON is the next driving force in defining how logistics disruptions are handled.

We are a team of mission-focused, world-class AI Engineers, mobility, and logistics experts (and some business folks) who are leveraging big data and cutting-edge technology to develop the next generation of technologies for addressing how our partners can better prepare for contested mobility disruptions. Together, we are building much needed solutions to address our Nation's pressing challenges in the areas of logistics and mobility. 

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 real autonomy and real impact. You’ll have end-to-end ownership of features and meaningful input into technical decisions, quality standards, and delivery practices working in a remote-first environment.

Core Tech Stack:

• Frontend : React 19, TypeScript, Vite-based React apps, Tailwind CSS, SignalR
• Backend: .NET 9 (C#), Minimal APIs, Entity Framework Core
• Async Processing: RabbitMQ, Redis (for scale-out and caching)
• Data and Storage: PostgreSQL, Amazon S3

What You’ll Do

• Shape the product architecture end-to-end. You’ll design and ship modular .NET services and modern React frontends that stay fast, reliable, and elegant across a wide range of real-world customer environments.
• Own the data foundation. You’ll design high-performance PostgreSQL schemas and craft EF Core queries that serve as the source of truth for business logic, permissions, and RBAC—balancing correctness, clarity, and scale.
• Engineer for performance at scale. You’ll build smart caching layers with Redis and leverage S3 for large artifacts, keeping our Web Gateway lean, responsive, and built to grow.
• Drive technical direction through RFCs. You’ll author and collaborate on design proposals that define data contracts and API boundaries, making our .NET platform and Python-based solver runners work together seamlessly.
• Ship with product and design, not in a silo. You’ll partner closely with product and design to turn real customer problems into thoughtful technical solutions—and deliver them in tight, iterative releases.
• Use AI as a force multiplier (responsibly). You’ll leverage tools like Claude Code and GitHub Copilot/Cursor to move faster and refactor with confidence, while keeping security, quality, and maintainability non-negotiable.
• Hold the quality bar high. You’ll help set the standard through great code reviews, automated testing, and pragmatic engineering practices that keep the codebase a joy to work in.

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, advisory-lock coordination patterns
• Prior work on ATO-evidence-bearing audit implementations (DoW, fintech regulatory audit, HIPAA-equivalent scale)
• Ability to architect AWS KMS integration with envelope encryption; HSM (PKCS#11) integration familiarity

Nice to Have (Preferred)

• Prior DoW / federal ATO submission experience
• NIST SP 800-53 AU family control implementation experience
• Prior DoW ATO experience on CDS integrations, familiarity with Radiant Mercury / ISSE Guard / EverFox / Forcepoint WebShield, knowledge of the ISSE approval workflow.

Other Qualifications

• Analytical Aptitude: Possess keen analytical and problem-solving skills, coupled with the capability to understand complex software challenges and collaborate toward viable solutions. 
• Effective Communication: Skilled in distilling technical complexities into comprehensible terms for varied audiences.
• Adaptive Nature: Resilience and adaptability in the face of an ever-changing tech landscape, with a knack for rapidly integrating new technologies and methodologies. 
• Agile Methodology Experience: An understanding and hands-on experience with agile development methodologies and version control tools.
• Agility in Tech: Demonstrated adaptability in the fast-paced tech landscape, continually embracing and integrating new technologies and methodologies. 
• Education: While formal education in Computer Science or related fields is a plus, DefconAI values hands-on experience and demonstrable skills above all. Candidates with 6+ years of relevant experience will be considered regardless of their academic pedigree. 
• Continuous Learner: A commitment to perpetually update one's skill set, staying aligned with the latest in technology trends and best practices.

What We Offer: 

• A fully remote, results-based environment
• Competitive salary, bonus, and equity package
• 100% employer paid, comprehensive health insurance including medical, dental, and vision for you and your family
• Unlimited PTO, with your manager’s approval
• Flexible work environment where you manage your work day
• 14 weeks of fully-paid parental leave

Salary range : $155,000-$215,000. This represents the typical salary range for this position based on experience, skills, and other factors.

#LI-RCP

Our Red Cell Partners Benefits:

For full-time roles

• Career track opportunity with potential for rapid advancement with strong performance as the firm grows 
• 100% employer paid, comprehensive health care including medical, dental, and vision for you and your family.
• Paid maternity and paternity for 14 weeks at employees' normal pay.
• Unlimited PTO, with management approval.
• Opportunities for professional development and continued learning.
• Optional 401K, FSA, and equity incentives available.
• Mental health benefits are available through Tara Mind .
• Cost effective GLP-1 solutions available through  Crux .

We’re an Equal Opportunity Employer: You’ll receive consideration for employment without regard to race, sex, color, religion, sexual orientation, gender identity, national origin, protected veteran status, or on the basis of disability.

Applicant Data Disclosure

By submitting an application, you acknowledge that Red Cell Partners, LLC ('Red Cell') uses third-party service providers to facilitate its recruitment and hiring processes. These providers include applicant tracking systems, candidate verification platforms, and fraud detection tools (collectively, 'Hiring Platforms'). Your application materials, including your résumé, cover letter, work samples, responses to application questions, and any other information you submit, may be transmitted to and processed by these Hiring Platforms for the following purposes:

• Managing and administering your application throughout the hiring process;

• Verifying the accuracy and authenticity of application materials, including by cross-referencing information you provide against publicly available sources and proprietary databases;
• Identifying indicators of potentially fraudulent, fabricated, or materially misleading application content, including but not limited to discrepancies between submitted materials and publicly available professional profiles, geographic anomalies, and fabricated work histories.

Applications that are flagged through this process as containing indicators of fraud or material misrepresentation may be declined from further consideration. If you have questions about the status of your application or the evaluation process, please contact  talent @redcellpartners.com . 

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For more information about how your data is used, please refer to our Privacy Policy and Applicant Privacy Notice .