Senior Software Engineer Software

Front Door Defense; Los Angeles, Northern (CA, KY); Hybrid; USD 160,000 - 190,000; Full time

Benefits offered by this job

Health insurance

Stock options

401K

Unlimited PTO

Hybrid schedule

Parental leave

Team outings

Open office El Segundo

Job summary

First Resonance in Los Angeles, CA is seeking a Senior Software Engineer to join our product team and help bring the ION Factory OS to life for hardware builders worldwide.

The role centers on building AI-assisted end-to-end features with Python on the backend and Next.js/TypeScript on the frontend, leveraging AI coding tools to accelerate development while maintaining quality and reliability.

Qualifications

• 6+ years of production-grade software experience.
• Proactively use AI coding tools to boost output and code quality.
• Advanced Python, ORM (SQLAlchemy) and async processing.
• Frontend mastery: TypeScript, React, Next.js proficiency.
• Cloud infra: AWS experience and multi-tenant SaaS deployment.

Responsibilities

• Own full-stack features using AI-augmented workflows (Python/TypeScript).
• Design GraphQL APIs and Postgres data models.
• Build scalable services on AWS for multi-tenant SaaS.
• Leverage AI tools to automate boilerplate and refactor legacy code.
• Create design specifications and UML/system diagrams.
• Improve reliability with tests (Pytest, Jest).

Skills

6+ years experience

AI-native workflow

Python

TypeScript

React

Next.js

GraphQL

AWS

Tools

SQLAlchemy

PostgreSQL

Pytest

Jest

Terraform

CDK

Job description

Senior Software Engineer

Build AI-assisted end-to-end features for industrial hardware manufacturing software

Location: Los Angeles, California

Compensation: $160,000 - 190,000 USD / year

About The Role

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.

Why This Role?

Are you excited by the opportunity to assist manufacturers working on eVTOLS, rockets, robots, and autonomous vehicles? We support companies tackling society's greatest challenges: climate change, space exploration, and autonomous transportation.

We pride ourselves on being fast learners and agile executors. If you want to play a key role in the future of hardware and Industry 4.0 by wielding the latest in AI-assisted development, come join us!

Responsibilities & Duties

• 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.

Qualifications & Skills

• 6+ years of technical experience: You've built and scaled production-grade software.

• 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.

• Cloud & Infra: Hands-on experience with AWS ecosystem and deploying multi-tenant SaaS environments.

• API Design: Strong experience with GraphQL and architectural patterns like Domain Driven Design (DDD) or Event-Driven systems.

• Problem Solver: You enjoy collaborating across departments and 'flexing your creative muscle' to solve hardware-world problems with software.

Desired Qualifications

• Experience with Infrastructure as Code (Terraform, CDK).

• Experience building manufacturing tools or working in high-stakes industrial environments.

• Experience writing complex ETL processes for industrial data.

Benefits & Perks

• Health & Wellness: Comprehensive medical, vision, dental, and life insurance.

• Ownership: Employee Stock Option Plan and 401K.

• Flexibility: Unlimited PTO and hybrid work schedule.

• Culture: Paid parental leave, team outings, group lunches, and an open office in El Segundo.