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# frontend leaning Full-Stack Software Engineer

- **Company:** Ethos Technologies Inc.
- **Location:** San Francisco, CA, United States
- **Experience:** Experienced
- **Salary:** $96,000 - $169,000
- **Contract:** Permanent contract
- **Skills:** HTML, A/B Testing, Application Programming Interfaces (APIs), Architectural Patterns, Unit Testing, Cascading Style Sheets (CSS), Code Review, Data Structures, Cursor, Software Design Patterns, Distributed Systems, Monitoring of Systems, Python (Programming Language), Node.Js, Microsoft Copilot, Salesforce.Com, Software Engineering, Twilio, TypeScript, Web Applications, Web Usability, Data Logging, ReactJS, Claude Code, Backend, Agentic-AI, Webpack, Build Tools, Web Technologies, Optimizely, Web Api
- **Published:** October 30, 2026
- **Apply:** https://startup.jobs/full-stack-engineer-frontend-leaning-ethos-life-9639293

## About the Role

* 2-5 years of relevant experience in a software engineering role
 * Full stack engineering experience in Javascript, Typescript, Node or Python
 * Experienced with software engineering best practices - design patterns, code reviews, unit and integration testing, etc.
 * Ability to communicate technical specifications both verbal and written
 * Understanding of security, common attacks and defenses
 * Experience shipping features behind an A/B testing or feature flag platform, such as Optimizely
 * Ability to succinctly communicate technical specifications both verbal and written
 * Command over front-end web technologies such as HTML, CSS and React
 * Familiar with optimizing Core Web Vitals and loading speed performance
 * Experience building complex architecture systems from the ground up, experience with backend architectural patterns of large, high-scale web applications
 * Expert at leveraging agentic coding tools (e.g., Claude Code, Cursor, Copilot) to accelerate development workflows and improve engineering productivity
 * Ability to design clean APIs and understanding of performance issues
 * Knowledge of mobile first responsive styling methodologies
 * Experience working with third-party lifecycle communication infrastructure, including platforms like Iterable, Twilio, Salesforce, and Regal, to orchestrate multi-channel customer engagement
 * Solid CS fundamentals - including data structures and algorithms
 * Understanding of security, common attacks and defenses
 * Knowledge of build systems configurations and setup - such as Webpack
 * Experience with infrastructure, distributed systems, and deploying apps into a high-scale environment with integrated logging and monitoring technologies

## Description

As a frontend leaning Full-Stack Software Engineer, you'll work across the stack and be responsible for building scalable platform services and systems. You'll work closely with other engineers to build and ship key features. We are detail oriented and value clean, modular, and high-performing code. You'll help architect and build our internal standards and frameworks. You are preferably located in San Francisco or willing to relocate. This is a hybrid role with at least 2 days in office and 3 days remote each week., * Design, build and maintain complex fullstack systems

 * Collaborate with other engineers, PMs and non-technical stakeholders to develop and ship features
 * Design, build, and maintain our API's
 * Find and solve performance issues
 * Participate in code reviews
 * Communicate best practices to the team
 * Write engineering requirements documents