Staff Engineer: Revenue Cycle & AI-Driven Backend

F-Prime Capital; Portland (OR); On-site; USD 160,000 - 200,000; Full time

Benefits offered by this job

PTO 3 weeks

Holiday schedule

Free therapy coverage

Medical/Dental/Vision

HSAs & FSA options

Disability & Life insurance

Parental Leave

401(k) match

Job summary

SonderMind is seeking a Staff Engineer to own end-to-end features across backend services, agentic frameworks, AI Pipelines, and front end. You’ll design scalable systems and lead architectural decisions with product, design, and QA collaboration.

Ideal candidates have 8+ years building web services, strong Ruby/Rails, TS/Node, Python expertise, and a solid API/PostgreSQL foundation, plus a mindset for continuous improvement and ambiguity-driven environments.

Qualifications

• 8+ years building web services or full-stack applications.
• Strong hands-on experience in Ruby/Rails, TypeScript/Node, Python or similar backends.
• Deep understanding of APIs, PostgreSQL, and some performance tuning.
• Proven ability to balance short-term delivery with long-term technical investments and continuous improvement of quality.
• Comfortable working in a fast-paced, ambiguous environment where requirements evolve over time.
• Excellent problem-solving, communication, and collaboration skills.
• Some knowledge of AI/ML is desired but not a requirement.
• Experience with LLMs or AI-driven toolchain (Langchain/Langgraph) is highly desirable.

Responsibilities

• Design, build, and maintain scalable Ruby/Rails, TypeScript/Node, and Python services and RESTful or gRPC APIs that integrate with agentic GenAI systems.
• Optimize MongoDB and PostgreSQL queries and service performance.
• Collaborate with cross-functional squads to define requirements and deliver features.
• Work on AI Agents, MCP servers and various other AI enabled tools and frameworks and so must be comfortable working with ambiguity and rapidly evolving technologies.
• Identify and drive process, architecture, and toolchain improvements.
• Mentor junior engineers (code reviews, pair-programming etc).
• Serve as a technical lead for complex projects, balancing scope, risk, and not compromising deliverable quality.

Skills

8+ years web services

Ruby/Rails

TypeScript/Node

Python

APIs

PostgreSQL

Performance tuning

AI/ML knowledge

Tools

MongoDB

PostgreSQL

Job description

SonderMind is seeking a Staff Engineer to own end-to-end features across backend services, agentic frameworks, AI Pipelines, and front end. You’ll design scalable systems and lead architectural decisions with product, design, and QA collaboration.

Ideal candidates have 8+ years building web services, strong Ruby/Rails, TS/Node, Python expertise, and a solid API/PostgreSQL foundation, plus a mindset for continuous improvement and ambiguity-driven environments.