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Phonely

Software Engineer Intern

San Francisco, California
Level
Intern
Work type
On-site · San Francisco

Not stated in the posting: salary, visa.

Open. First seen 8 May 2026.

About the role

Software Engineer Internship
This is a high-impact internship where you’ll write real code, ship features, and see your work in production.
Note: This is an in-office role, 5 days a week in San Francisco.
What You’ll Do

  • Investigate and troubleshoot real customer issues across frontend and backend systems
  • Work closely with customers and internal teams to diagnose bugs, performance bottlenecks, and reliability problems
  • Build internal tooling and dashboards to improve debugging, monitoring, and operational workflows
  • Help monitor production systems and support incident response efforts
  • Assist engineers in identifying root causes and shipping fixes quickly
  • Build and maintain components for high-performance web applications using React and Next.js
  • Collaborate with engineers to integrate APIs, real-time systems, and observability tooling
  • Improve UI/UX by building responsive and user-friendly interfaces
  • Support performance optimization efforts across rendering, caching, and latency
  • Write clean, maintainable, and well-documented code
  • Participate in code reviews, team discussions, and product development

Qualifications

  • Currently pursuing or recently completed a degree in Computer Science or related field
  • Experience with JavaScript/TypeScript and modern frontend frameworks (React preferred)
  • Familiarity with Next.js or willingness to learn quickly
  • Strong problem-solving and debugging skills
  • Comfortable investigating technical issues and working through ambiguous problems
  • Basic understanding of APIs, async programming, and web fundamentals
  • Exposure to full-stack development through projects, coursework, or internships
  • Strong communication skills and ability to work directly with customers and teammates
  • Eagerness to learn quickly in a fast-paced environment

Nice to Have

  • Experience with backend development (Python or Node.js)
  • Familiarity with cloud platforms (AWS, GCP)
  • Experience with observability or monitoring tools
  • Familiarity with databases (Firebase, Supabase, or similar)
  • Interest in AI, real-time systems, infrastructure, or voice technologies

What You’ll Gain

  • Real-world experience debugging and operating production systems
  • Hands-on exposure to customer-facing engineering and issue investigation
  • Mentorship from experienced engineers
  • Experience working with modern infrastructure, observability, and AI systems
  • Opportunity to make meaningful contributions to a fast-growing company

Our Tech Stack

  • Frontend: React, Next.js, TypeScript
  • Backend: Python, microservices, async systems
  • Cloud & Infra: AWS, GCP, Kubernetes, Redis
  • Databases: Firebase, Supabase
  • Observability: Datadog, logging, metrics, tracing

What this role asks for

Particular to this role

Node.js · React · TypeScript

Rare in Phonely's other 8 open postings.

Standard for software engineering roles

Python

Common in software engineering postings at any company.

Read against Phonely's other open postings on this site.

The team: Engineering

This role is one of 5 open in Engineering.

WHAT THE TEAM WORKS WITH, ACROSS ITS POSTINGS

AWS (4 of 5), CI/CD (4 of 5), Datadog (4 of 5), Firebase (4 of 5), GCP (4 of 5), JavaScript (4 of 5), Kubernetes (4 of 5)

OTHER ROLES ON THIS TEAM

From the team and dates on Phonely's own job board.

Salary context

10 other open postings titled Software Engineer Intern state a salary: median USD 122,400 to USD 124,800 a year.

See Software Engineer salaries in San Francisco →

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