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Senior Staff Software Engineer, Client Architecture at Reddit · LumiJobs

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Reddit· Posted Jul 13, 2026

Senior Staff Software Engineer, Client Architecture

Remote - United Statesfull timeRemote

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senior

$233k–$326k

H1B: yes

Reddit The Senior Staff Software Engineer at Reddit owns the cross-client architecture for content creation across Web, iOS, and Android platforms. This role involves defining shared contracts, enhancing video and media capabilities, and integrating AI to inspire user contribution.

Responsibilities

Own the cross-client architecture: Define the shared contracts that Web, iOS, and Android build against, including our rich content model, GraphQL schemas, and shared UI primitives. A feature should be designed once and shipped natively everywhere, not built three bespoke ways.
Make video and media first-class: Set the client architecture for video creation, editing, drafts, and upload, built to survive bad networks, app restarts, and lower-end devices.
Bring new formats to every user: Establish how new contribution formats plug natively into the composers on every client, including formats that started on our Developer Platform. Unblock execution on the pillar's highest-upside bets.
Drive experimentation rigor: Partner with Data Science on metric strategy for net-new features. Give engineers a clear recipe for designing and reading experiments, and make the call to iterate or kill when results come back flat.
Bring AI into contribution thoughtfully: Shape where LLMs help people create, from inspiration at the start of the journey to routing and labeling at the end, while the content itself stays human. Model effective use of AI-assisted development tools, with rigorous judgment over what they produce.
Lead beyond your team: Write the technical direction and get partner teams to adopt it: client platform, search, feeds, trust and safety, and the developer platform. Negotiate priorities and migrations, and mentor senior and staff engineers on every client.
Raise the bar on client performance and reliability: Own composer success rates, latency, and crash budgets across platforms. Spot recurring pain points across technical designs and fix them at the root.

Qualification

Client Architecture ExpertiseDomain ExpertiseCommunicationDemonstrated ability to lead largeBrowser engine

Required

10+ years of professional software engineering experience with a proven track record as a Senior Staff Engineer or Principal Engineer on consumer-facing mobile or web client applications.
Client Architecture Expertise: Deep mastery of modern web architecture (e.g., React, TypeScript, advanced state management) with strong architectural command of native mobile paradigms (iOS/Swift, Android/Kotlin) to define unified client APIs and lead cross-platform engineering standards.
Domain Expertise: Demonstrated track record of solving hard client-side performance and rendering bottlenecks at scale, building highly interactive features such as zero-latency rich-text editors, asynchronous media processing pipelines, or real-time state synchronization systems.
Communication: Exceptional written and verbal communication skills. Ability to influence VP-level technical direction and navigate strict tradeoffs between performance, reliability, and business impact without directly managing the engineers involved.
Demonstrated ability to lead large, cross-functional engineering initiatives that balance technical excellence with aggressive growth targets.

Preferred

Experience with contribution and creation surfaces: composers, editors, rich text and document models, media and video pipelines, offline drafts and sync.
Browser engine, framework internals, or notable open source contributions.
Building product surfaces on top of LLMs, including handling latency and unpredictable responses in the UI.

Benefits

Dental
Vision
401(k)
Equity/RSU
Parental Leave
Wellness

Company

View company page

1001-5000 employees

Social Media

Founded 2005

Source: greenhouse

Active within the past hour

Remote-friendly

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Must-Have Skills for This Role

GraphQLWebiOSAndroidAIVideo creation

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