Senior Full-Stack Engineer — AI, Geospatial & Water Tech

Trinnex; Portland (OR); On-site; USD 120,000 - 170,000; Full time

Job summary

Trinnex seeks a Senior Full Stack Developer to build high-impact applications integrating sensor/IoT data, geospatial tech, ML, and AI-powered agents. You will influence technical direction across the full stack, implement scalable architectures, and collaborate with a cross-functional team to deliver production-ready solutions.

You’ll work on modern tech stacks, including agent orchestration, RAG, and contextual retrieval, while mentoring junior developers and ensuring quality across frontend,

Qualifications

• Proven experience designing and developing full stack web applications
• Proficiency with modern front‑end frameworks (React with Context API and Hooks)
• Experience with back‑end development using C#/.NET and JavaScript/TypeScript (Node.js, Next.js, Express)
• Solid understanding of API design, data integration, and system architecture
• Experience with geospatial technologies (ESRI, PostGIS, Mapbox)
• Ability to diagnose and solve complex technical problems
• Strong communication and collaboration skills
• Experience designing or contributing to agentic systems and multi‑agent workflows
• Understanding of RAG patterns, agent orchestration, and A2A communication
• Familiarity with AI development tools (Claude, Cursor)
• Proactive learning mindset

Responsibilities

• Design, develop, and maintain scalable frontend and backend applications
• Build and optimize REST, GraphQL, and other APIs
• Apply code quality, security, performance, and testing best practices
• Contribute to AI driven features, including agent-based workflows
• Support RAG, vector data access, and contextual retrieval
• Collaborate on architectures enabling agent orchestration and A2A communication
• Develop and execute automated testing strategies
• Deploy applications via CI/CD and collaborate with DevOps
• Troubleshoot complex issues across the stack
• Mentor juniors and support cross‑functional delivery

Skills

Full stack design

React

C#/.NET

JavaScript/TypeScript

API design

Geospatial tech

Complex problem solving

Communication

Agentic systems

RAG / A2A

AI tools familiarity

Learning new tech

Education

Bachelor's degree

Tools

CI/CD tooling

Kubernetes

GCP

Mapbox/PostGIS/ESRI

Job description

Trinnex seeks a Senior Full Stack Developer to build high-impact applications integrating sensor/IoT data, geospatial tech, ML, and AI-powered agents. You will influence technical direction across the full stack, implement scalable architectures, and collaborate with a cross-functional team to deliver production-ready solutions.

You’ll work on modern tech stacks, including agent orchestration, RAG, and contextual retrieval, while mentoring junior developers and ensuring quality across frontend,