Fullstack Developer
About The Position
Manifest OS is an AI-native company on a mission to replace the billable hour and make legal services more accessible for American businesses and consumers. We power the next generation of AI-native law firms with one unified global brand, a proprietary technology platform, and a centralized back office — enabling lawyers to eliminate the administrative burden and focus on delivering exceptional outcomes for their clients. Manifest OS has raised a $60M Series A from Menlo Ventures, Kleiner Perkins, First Round, and Quiet Capital. We're looking for a backend-focused Senior Fullstack Developer to help build the legal tech platform powering the next generation of AI-native law firms. You'll own the development of secure client portals and enterprise-grade systems — from architecture to production. This role sits on a 20+ person senior engineering team that moves quickly and builds with AI at every layer.
Requirements
- 7+ years of fullstack development with strong Node.js and TypeScript expertise
- Proven track record delivering features that produce measurable business outcomes
- Experience building production APIs with monitoring, error handling, and documentation
- Strong PostgreSQL or relational database design skills
- Hands-on cloud platform experience — GCP preferred, AWS or Azure acceptable
- Daily use of AI coding tools (Cursor, Copilot, or similar) for 50%+ of your workflow
Nice To Haves
- Experience at AI-native companies such as Cursor, Replit, Vercel, or similar
- Background building client portals, CRMs, or case management systems
- Python knowledge for AI/ML tooling and integration
- Familiarity with legal tech or other regulated industries
Responsibilities
- Build and ship full-stack features end-to-end across our legal tech platform
- Design and maintain production-grade APIs with proper error handling and documentation
- Architect secure client portals and case management systems with complex permissions
- Integrate LLMs and AI workflows into document processing and automation features
- Contribute to database design and backend architecture using PostgreSQL
- Deploy and manage services on cloud infrastructure, preferably GCP
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What This Job Offers
Job Type
Full-time
Career Level
Senior
Education Level
No Education Listed
