# Software Engineer, Internal Tools

**Company:** [Sesame](https://hotfix.jobs/companies/sesame)
**Location:** San Francisco, CA
**Role:** Fullstack Engineering
**Salary:** $175k – $280k/yr
**Experience:** 4+ years
**Skills:** React, Python, JavaScript, Cloud Computing, ML Infrastructure, Full-Stack Development, AWS, GCP, Data Pipelines, UI/UX Design
**Posted:** 2026-01-20

> Build and maintain React-based web tools and Python infrastructure for ML data pipelines and internal developer productivity at a voice AI startup. Collaborate with ML engineers and researchers, focusing on usability, reliability, and cloud deployment. Requires 4+ years full-stack experience.

## Job Description

## Responsibilities
- Rapidly prototype and build internal tools for a variety of functions.
- Work on our ML infrastructure, internal tooling, and data management.
- Improve our developer productivity and our application reliability by investing in developer tooling and practices.
- Develop custom internal tools and integrations where needed for more complex workflows.
- Consult with research teams to deeply understand their workflows and identify opportunities for automation.
- Maintain and iterate on tools based on user feedback to continually improve utility.
- Monitor tool reliability and be available to troubleshoot issues.
- Advocate for interfaces, APIs, and UX designed for usability.

## Required Qualifications
- 4+ years building production full-stack software with a focus on usability
- Strong communication skills
- Start-up mindset
- **Proficiency with modern web development stacks**
- **Experience with cloud technologies**
- Experience working with ML research teams
- Demonstrated a focus on reliability and iterative improvement
- Experience building internal tools
- Experience balancing trade-offs while maintaining security, privacy, and reliability standards
- Knowledge of security and privacy best practices

## Benefits
- 401(k) max employer match: 3.5% of compensation
- 100% employer-paid health, vision, and dental benefits for you and your dependents
- Unlimited PTO and sick time
- Flexible spending account with employer matching up to $1,650/year (medical FSA)
- Guardian Employee Assistance Program (EAP)
- Opportunity to share in the company's success with competitive stock options

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**Apply:** https://hotfix.jobs/jobs/e93591c9-e931-4724-b78b-030cad3746c6
**Canonical:** https://hotfix.jobs/jobs/e93591c9-e931-4724-b78b-030cad3746c6