Senior Full Stack Software Engineer

Role Overview

Senior Full Stack Software Engineer (Senior individual contributor)

Design, build, and scale modern web applications end-to-end in a remote-first environment. You’ll work across frontend UI, backend services/APIs, asynchronous processing, and data layers—delivering reliable, secure features with long-term maintainability.

Core Tech Stack

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

What You’ll Do

• Shape product architecture end-to-end by designing and shipping modular .NET services and modern React frontends.
• Own the data foundation: design high-performance PostgreSQL schemas and build EF Core queries that serve as source-of-truth for business logic, permissions, and RBAC.
• Engineer for performance at scale using Redis caching and S3 for large artifacts.
• Drive technical direction via RFCs: author and collaborate on design proposals defining data contracts and API boundaries.
• Work iteratively with product and design to translate customer problems into technical solutions.
• Use AI responsibly (Claude Code, GitHub Copilot/Cursor) to accelerate development while keeping security, quality, and maintainability high.
• Maintain a high quality bar through strong code reviews, automated testing, and pragmatic engineering practices.

Required Qualifications

• 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, and chain continuity verification.
• Fluency with PostgreSQL transactional guarantees for audit writes and advisory-lock coordination patterns.
• Prior work implementing ATO-evidence-bearing audits (e.g., DoD, fintech regulatory audits, or HIPAA-equivalent scale).
• Ability to architect AWS KMS integration with envelope encryption; familiarity with HSM (PKCS#11) integration.

Nice to Have

• Prior DoD / federal ATO submission experience.
• NIST SP 800-53 AU family control implementation experience.
• Prior DoD ATO experience on CDS integrations and familiarity with ISSE approval workflow/tools (Radiant Mercury / ISSE Guard / EverFox / Forcepoint WebShield).

Other Qualifications

• Strong analytical and problem-solving skills with ability to collaborate on complex system challenges.
• Ability to communicate technical concepts to varied audiences.
• Resilience and adaptability in a changing technical landscape.