Open to roles Daniel Nullmeyer · Trust & Safety Design Portfolio in progress

Designing trust at Scale
Safety // Platform // Systems

Daniel Nullmeyer
Daniel Nullmeyer
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Senior IC

Status

8+ years UX. Six years sole designer on Reddit’s Safety Experience team — designing at the intersection of ML, policy, and user-facing safety mechanics. Open to senior IC product design roles in Trust & Safety, AI/ML platforms, and integrity-adjacent product areas.

Location

Portland, OR · Remote-friendly

Contact

nullmeyerd@gmail.com
·  TRUST & SAFETY  ·  MODERATION TOOLING  ·  ML-POWERED SYSTEMS  ·  PLATFORM INTEGRITY  ·  SYSTEMS DESIGN  ·  TRUST & SAFETY  ·  MODERATION TOOLING  ·  ML-POWERED SYSTEMS  ·  PLATFORM INTEGRITY  ·  SYSTEMS DESIGN  ·
·  75K+ COMMENTS FILTERED DAILY  ·  100K+ COMMUNITIES PROTECTED  ·  6.2M ACCOUNT ACTIONS / YEAR  ·  121.4M DAILY USERS  ·  6 ML FILTERS SHIPPED  ·  75K+ COMMENTS FILTERED DAILY  ·  100K+ COMMUNITIES PROTECTED  ·  6.2M ACCOUNT ACTIONS / YEAR  ·  121.4M DAILY USERS  ·  6 ML FILTERS SHIPPED  ·
01 · Live Suite

The Filter Suite, recreated.

Reddit’s six-filter ML-powered moderator suite (2021–2026), interactive in vanilla HTML/CSS/JS. The production system shipped to 100,000+ communities; this version is a public-safe artifact you can actually click through.

• Live Interactive Switch filters →
Vanilla HTML / CSS / JS · zero frameworks
safety-filters-specs / preview-main.html

Each filter: working settings, functional toggles, dropdowns, tag inputs, FAQ accordions, and a live test-the-filter simulation. Interaction patterns, copy, and UX flows match what shipped in the Reddit mobile and web apps.

02 · Press
001 Engadget — “Reddit ‘revamped’ its block feature so blocking actually works” JAN 2022 002 Adweek — “Reddit Overhauls Blocking Experience” JAN 2022 003 Bloomberg — “Reddit’s IPO Success Hinges on Infamously Unruly User Base” MAR 2024 004 The Register — “Reddit moderators getting an assist from a new LLM tool” MAR 2024 005 Slashdot — “Reddit Will Now Use an AI Model To Fight Harassment” MAR 2024 006 New York Times — “Reddit’s I.P.O. Is a Content Moderation Success Story” MAR 2024
03 · Case Studies in Progress

Four case studies. In progress.

Six years of Trust & Safety design at Reddit doesn’t fit in a launch banner. Full case studies are being written and will land here through Q2 2026:

  • 01
    Moderator Filter Suite

    Reddit’s six-filter ML-powered moderator safety suite, including Reddit’s first LLM-powered moderation tool (Harassment Filter, Q1 2024). Deployed across 100,000+ active communities. Live prototype above ↑

  • 02
    Platform-Wide Blocking

    Redesign from one-sided mute to mutual blocking, shipped to hundreds of millions of users. Designed the moderator carve-out that preserved admin function while preventing surveillance abuse. Covered by Engadget and Adweek.

  • 03
    Reporting & Content Lifecycle

    End-to-end redesign of the reporting UX and content lifecycle across iOS, Android, mobile web, and desktop. The user-facing path feeding 6.2M+ account actions per year.

  • 04
    Internal Operator Tooling

    Enforcement features on Reddit’s internal admin actioning tool used by Trust & Safety agents for reports, escalations, and appeals. Behind 99,492 hateful-content suspensions (Q3 2023) and 828 Moderator Code of Conduct investigations at 98% actionability (H2 2024).

In progress · ETA Q2 2026

Hiring? Get in touch and I’ll share the deck or walk you through whichever project maps to your role.

Request case studies Or download the resume ↓