Senior Software Engineer

• We’re looking for a full-time Senior Software Engineer to join us in our mission of bringing the ION Factory OS to next-generation hardware builders around the globe. We are looking for engineers who leverage AI coding tools to build end-to-end features with unprecedented speed and quality
• Our newest recruit will join the First Resonance team full-time in Los Angeles, CA (HQ in El Segundo) as a foundational member of our product team
• End-to-End Feature Ownership: Use AI-augmented workflows (Claude) to build and deploy full-stack features using Python (Backend) and Next.js/TypeScript (Frontend)
• API & Data Architecture: Develop high-performance GraphQL mutations and queries; design relational database models in Postgres that reflect complex industrial processes
• Cloud Infrastructure: Build and maintain scalable services on AWS, leveraging modern infrastructure patterns
• AI-Driven Productivity: Lead the team in adopting AI tools to automate boilerplate, refactor legacy logic, and accelerate the “idea-to-production” cycle
• Technical Leadership: Write design specifications and diagrams (UML/System Flow) that guide both human teammates and AI agents
• Reliability: Drive code-level architecture, modularity, and comprehensive testing (Pytest, Jest) to ensure ion remains mission-critical for our customers

Benefits

• Medical, dental & vision
• Generous life and disability insurance for you and your family
• Flexible PTO
• 401K retirement plan with employer match
• Other financial benefits and services to give you financial peace of mind
• Equity
• Up to 16 weeks of parental leave
• Flexible spending accounts
• Work-from-home setup
• Remote & hybrid options (role dependent)
• Amazing office in Downtown LA

• API Design: Strong experience with GraphQL and architectural patterns like Domain Driven Design (DDD) or Event-Driven systems
• Cloud & Infra: Hands-on experience with AWS ecosystem and deploying multi-tenant SaaS environments
• AI-Native Workflow: You are “pro-AI” and actively use coding assistants to increase your output and code quality
• Backend Mastery: Expert-level Python skills with a deep understanding of ORMs (e.g., SQLAlchemy) and asynchronous processing
• Modern Frontend: Proficiency in TypeScript, React, and Next.js
• Problem Solver: You enjoy collaborating across departments and “flexing your creative muscle” to solve hardware-world problems with software
• 6+ years of technical experience: You’ve built and scaled production-grade software
• Experience writing complex ETL processes for industrial data
• Experience building manufacturing tools or working in high-stakes industrial environments
• Experience with Infrastructure as Code (Terraform, CDK)