Dropbox

Dropbox is a technology company that builds simple, powerful products for individuals and businesses. With over 700 million registered users worldwide, Dropbox offers file sync, sharing, online backup, cloud storage, collaboration tools, and more to st...

Internet Software & Services

Information Technology

1K-5K (3118)

Founded 2007

72 open positions

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Staff Fullstack Software Engineer, Core Performance

2 days, 15 hours ago

United States

Full-time

Lead

Full-stack Engineer

Software Development

CI/CD Go JavaScript Kotlin LLM Python React Swift

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Dropbox

Internet Software & Services

1K-5K

Founded 2007

View All Jobs 72

Description

Drive performance improvements for Dropbox’s web application by profiling React surfaces, identifying high-impact opportunities, and shipping measurable fixes.
Lead the broader performance initiative across iOS, Android, and desktop by coordinating with platform experts and setting technical strategy.
Own the full performance workflow from measurement and root-cause analysis through code changes and validation in production telemetry.
Build and maintain measurement, instrumentation, and regression-detection systems used by Core Engineering.
Write production code regularly in JavaScript and React, with additional backend work in Python and Go.
Set performance engineering standards across Core Engineering and mentor IC3 and IC4 engineers on profiling and performance-aware design.
Use AI tools in day-to-day engineering work and improve AI-assisted workflows across Core to increase engineering throughput.
Partner with engineering leaders, PMs, and designers to influence roadmaps and architectural decisions with performance as a product priority.

Requirements

BS, MS, or PhD in Computer Science or a related technical field involving coding, or equivalent technical experience.
Minimum of 12 years of software engineering experience, including 3+ years at the Senior level.
Hands-on experience improving performance in production web applications.
Experience profiling JavaScript and React surfaces and using flame graphs, heat maps, traces, and RUM data to identify root causes.
Experience using AI tooling and LLM-assisted workflows to accelerate performance work.
Experience optimizing AI-assisted engineering workflows for other engineers, including selecting tools and defining guardrails.
Production experience with modern backend services in Python or Go that support consumer-facing client surfaces.
Experience leading cross-cutting technical strategy across multiple teams or surfaces, including design docs, architecture, and execution to measurable outcomes.
Experience working on consumer-facing products and shipping changes that moved customer-visible metrics.
Strong written and verbal communication skills with a track record of influencing decisions outside a direct reporting line.
Preferred: experience profiling and improving native iOS applications in Swift, including startup time, scroll performance, and memory behavior.
Preferred: experience profiling and improving native Android applications in Kotlin, including startup time, scroll performance, and memory behavior.
Preferred: experience profiling and improving desktop client applications, including startup, IPC, and resource usage.
Preferred: experience building or owning performance regression-detection systems integrated into CI/CD.
Preferred: experience with RUM telemetry pipelines, sampling strategy, and statistically rigorous performance comparisons.
Preferred: track record of mentoring senior engineers and raising the technical bar across an engineering organization.
Ability to participate in on-call rotations if assigned to a services team.

Benefits

US salary range of $248,200–$335,800 in Zone 1, $223,400–$302,200 in Zone 2, and $198,600–$268,600 in Zone 3.
Exposure to senior leadership and the opportunity to build foundational systems with company-wide impact.
Opportunity to shape Dropbox’s performance discipline and grow into an org-level technical strategist.
Work that directly affects the experience of hundreds of millions of users.
Opportunity to build and influence AI-assisted engineering practices across Core.

Interested in this position?

Apply directly on the company website

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