Public evidence index · assembled 2026-09-17 · revision 4

Jane Manchun Wong

Hong Kong–born, San Francisco–based security researcher and self-taught app researcher who reverse-engineers public app builds to reveal unreleased features — the definitive leaker of the social-app industry, later a Meta engineer on Instagram and Threads.

Also known as @wongmjane, Jane Wong, 黃文津

This index is partial, source-bounded, dated, and revisable. It is published by @ben, not by the subject. Claims cite their sources; contradictions are preserved rather than resolved.

Jane Manchun Wong is the researcher who made "it was in the code" a reporting beat. Working from Hong Kong and later San Francisco, she reverse-engineers the public builds of the world's biggest apps — Twitter, Instagram, Facebook, Snapchat, Spotify, LinkedIn, and more — to surface features the companies have not announced, publishing screenshots and mock-ups under her handle @wongmjane. The BBC called her "the woman scooping Silicon Valley"; MIT Technology Review called her work keeping tech "on its toes"; Casey Newton put it plainly: "there's no such thing as a secret beta anymore."

Origins and method

Wong was born in British Hong Kong in April 1994 and grew up there, a self-taught coder whose origin story is a seven-year-old replacing Windows with Linux to defeat parental controls. She studied computer science at UMass Dartmouth but left a few months before graduating because of medical issues — a decision she has said she regrets. Her method needs no insider access: she decompiles shipped mobile apps and reads public client-side code for dormant, flag-gated features, then documents what she finds. When the finding is a security risk rather than a feature, she routes it through bug-bounty programs first — her April 2020 write-up on reporting a private-API abuse path in the unreleased Messenger Rooms is the canonical example.

The scoop era

Her first documented discovery came in October 2017 — a Facebook résumé feature, surfaced via Matt Navarra — and her first self-posted "finding" followed on May 4, 2018: "Twitter is working on End-to-End Encrypted Secret DM!" What followed was a near-daily feed of discoveries that became infrastructure for tech journalism: Facebook Dating's homepage and a nearby-friends map in 2018, Instagram's hidden like counts in April 2019 (confirmed by Adam Mosseri about twelve days later), dark modes across apps, Twitter's tipping feature, and in May 2021 the name, price, and feature set of Twitter Blue weeks before launch. By October 2019, CNBC reported that Facebook employees themselves watched her feed to learn what other teams were building. Engineers began leaving "Hi, Jane" messages in code; one Instagram experiment was literally named "What's up Jane." The work was not free for her: she has described depression, harassment, and being treated as "an emotional punching bag" by users angry at features she merely reported. Recognition accumulated anyway — Tatler's Gen.T list in 2020, Forbes's 30 Under 30 (2022, Social Media) announced December 2021, and the MIT Technology Review profile in April 2022.

The Meta chapter

In June 2023 she crossed the wall: she joined Meta to work on Instagram and Threads — the flagship app of a company whose roadmap she had spent years leaking — relocating to San Francisco and announcing it on Threads on launch day, July 5. The hire was celebrated publicly by CTO Andrew Bosworth (already reportedly a member of Meta's internal Jane Manchun Wong fan club) and Instagram head Adam Mosseri. As a Threads team member she shared in the product's 2024 Webby win for Best Mobile User Interface. The chapter ended on October 16, 2024, when a Meta reorganization eliminated her role alongside cuts at Instagram, WhatsApp, and Reality Labs. Weeks later she announced a senior software engineer role at an unnamed Los Angeles startup — a post now unavailable, its date inconsistent even within Wikipedia.

After Meta

The hiatus ended loudly. In April 2025 she surfaced Figma's in-development Claude-powered AI app maker and "Figma Sites." In December 2025 she published her most technically striking disclosure: the complete 1,200-line system prompt for Waymo's unreleased Gemini ride assistant, recovered from the public app build — proof her method generalizes past social apps. By mid-2026 she had turned it on her own city, building a "radar" that scans San Francisco permits, business registrations, and health filings to scoop restaurant and retail openings — the Animate pop-up in Japantown, Stella Wang's Numb, the Corgi Cafe site — and telling the San Francisco Standard she has not ruled out shipping it publicly. A Twitter design patent granted in 2023 even cites her tweeted screenshot as prior art: the legal record now treats her findings as part of the state of the art.

What she says it means

Wong insists her work is not leaking — "leaks" come from employees, she says, while she reads "publicly available data and code." The mission, in her telling, is transparency: people who use these apps deserve to know what is being built behind the scenes, and "if they had been [transparent] before, I wouldn't have to do this." She also insists it is not the point of her life: she has wanted to be a software engineer since age six, wants to create things, and has said she will stop when her curiosity is satisfied.

What the record does not settle

The profile trail contradicts itself on her birth year (1994 by her own account; reported ages implying 1995–96). Her Meta title is variously reported. Her current employer is unconfirmed, with her own bio now listing "startups" in the past tense. This index preserves those seams rather than smoothing them.

This index was compiled from public sources and does not imply the subject's endorsement. Citations live in the packet's source catalog.

Timeline by topic

Topics follow the event kinds supplied in this index. Each entry links to its full record in the chronological timeline. Dates retain the precision supplied by the publisher.

Birth (1)
  1. Born in British Hong Kongbirth[19][20]
Roles (2)
  1. Software engineer at Meta on Instagram and Threadsrole[8][19][35]
  2. Announces move to an unnamed Los Angeles startuprole[19][9]
Projects (1)
  1. Builds a San Francisco 'openings radar'project[39]
Publications (2)
  1. Messenger Rooms bug-bounty write-uppublication[6][10]
  2. Publishes Waymo's unreleased Gemini ride-assistant system promptpublication[5][32]
Awards (4)
  1. Tatler Gen.T Leaders of Tomorrowaward[2]
  2. Forbes 30 Under 30 (2022 list), Social Mediaaward[17][19][2]
  3. Threads Web wins Webby for Best Mobile User Interfaceaward[16][2]
  4. Named to SF Standard's SF 100 (The Thinkers)award[38]
Media (4)
  1. First press profiles: SCMP, The Next Web, SCMP podcastmedia[24][25][12]
  2. CNN and BBC profiles; freelance bug-bounty eramedia[22][21]
  3. CNBC: Facebook employees rely on her feedmedia[23]
  4. MIT Technology Review profilemedia[27]
Milestones (6)
  1. First discovery: Facebook's résumé featuremilestone[37][19]
  2. First 'finding' tweet: Twitter's encrypted Secret DMmilestone[27]
  3. Reveals Instagram's hidden-like-counts testmilestone[19][21]
  4. Scoops Twitter Bluemilestone[28][29]
  5. Reveals the Twitter edit button's immutable designmilestone[30]
  6. Reveals Figma's in-development AI app makermilestone[31]
Other events (4)
  1. Circumvents parental controls with Linuxother[19][24]
  2. Facebook Dating and nearby-friends map leaksother[19][24]
  3. Laid off in Meta reorganizationother[34][35][36]
  4. Judges the Outside LLMs AI & Music hackathonother[18][2]

Timeline

  1. Born in British Hong Kongbirth

    Grew up in Hong Kong; Chinese name 黃文津. Early press profiles give ages implying a slightly later birth year — see openQuestions.

    [19][20]
  2. Circumvents parental controls with Linuxother

    At about seven she replaced Windows with Linux on the family computer to defeat her parents' controls — the anecdote she gives for the start of her self-taught path.

    [19][24]
  3. First discovery: Facebook's résumé featuremilestone

    As a UMass Dartmouth undergrad, she spotted Facebook testing a LinkedIn-style 'work histories' résumé feature; screenshots surfaced via Matt Navarra and Facebook confirmed the test.

    [37][19]
  4. Facebook Dating and nearby-friends map leaksother

    Published screenshots of Facebook Dating's homepage before release and revealed a map feature showing nearby friends' locations.

    [19][24]
  5. First 'finding' tweet: Twitter's encrypted Secret DMmilestone

    Shortly after midnight she posted 'Twitter is working on End-to-End Encrypted Secret DM!' — the start of the near-daily findings feed.

    [27]
  6. First press profiles: SCMP, The Next Web, SCMP podcastmedia

    Zen Soo's SCMP profile, The Next Web's 'engineering detective' feature, and an Inside China Tech podcast episode introduced her method to a wide audience.

    [24][25][12]
  7. CNN and BBC profiles; freelance bug-bounty eramedia

    CNN ('This 24-year-old finds unreleased features') and the BBC ('The woman scooping Silicon Valley') profiled her; she told the BBC she spent up to 18 hours a weekend on code alongside paid bug-bounty work.

    [22][21]
  8. Reveals Instagram's hidden-like-counts testmilestone

    Reported Instagram was testing hiding like counts; Adam Mosseri confirmed the experiment about twelve days later — the scoop that defined her beat.

    [19][21]
  9. CNBC: Facebook employees rely on her feedmedia

    Reported that Facebook employees turned to the Hong Kong researcher's posts to learn what other internal teams were building.

    [23]
  10. Tatler Gen.T Leaders of Tomorrowaward

    Named to Tatler Asia's Gen.T list (Hong Kong, Technology).

    [2]
  11. Messenger Rooms bug-bounty write-uppublication

    Published her account of reporting a private-API abuse risk in Facebook's unreleased Messenger Rooms through the bug-bounty program.

    [6][10]
  12. Scoops Twitter Bluemilestone

    Revealed the name, $2.99 price, and feature set of Twitter's in-development subscription weeks before launch.

    [28][29]
  13. Forbes 30 Under 30 (2022 list), Social Mediaaward

    Named to the Forbes 30 Under 30: Social Media list published December 2021; Tatler's Asia's Most Influential list followed the same year.

    [17][19][2]
  14. Reveals the Twitter edit button's immutable designmilestone

    Found code showing edits would create a new tweet linked to prior versions rather than mutating the original — matching the design Twitter later shipped.

    [30]
  15. MIT Technology Review profilemedia

    Tanya Basu's profile, 'Spilling Silicon Valley's secrets, one tweet at a time,' documented her method, the harassment costs, and Meta's internal fan club.

    [27]
  16. Software engineer at Meta on Instagram and ThreadsroleMetaSan Francisco

    Relocated from Hong Kong to San Francisco to join Meta; announced on Threads on launch day, July 5, 2023. The hire was celebrated publicly by Bosworth and Mosseri.

    [8][19][35]
  17. Threads Web wins Webby for Best Mobile User InterfaceawardMeta / Threads

    The Threads team's web client won a 2024 Webby; Wong lists it among her honors as a team member.

    [16][2]
  18. Laid off in Meta reorganizationotherMeta

    Her role was eliminated in cuts across Instagram, WhatsApp, and Reality Labs; she announced it publicly on Threads.

    [34][35][36]
  19. Announces move to an unnamed Los Angeles startuproleLos Angeles

    Posted that she was joining an LA startup as a senior software engineer. Wikipedia's article text dates the move December 2024 while citing the post to October 24, 2024; the post is now unavailable.

    [19][9]
  20. Judges the Outside LLMs AI & Music hackathonotherSan Francisco

    Listed as a judge for the AI & Music hackathon at Outside Lands Festival.

    [18][2]
  21. Reveals Figma's in-development AI app makermilestone

    Post-Meta return to form: she surfaced Figma's Claude-powered AI app builder and 'Figma Sites' before announcement.

    [31]
  22. Named to SF Standard's SF 100 (The Thinkers)award

    The San Francisco Standard's influence list cited her for finding 'big tech's cheat codes.'

    [38]
  23. Publishes Waymo's unreleased Gemini ride-assistant system promptpublication

    Recovered the 1,200-line 'Waymo Ride Assistant Meta-Prompt' from the mobile app and published it with analysis; covered by TechCrunch and The Verge.

    [5][32]
  24. Builds a San Francisco 'openings radar'projectSan Francisco

    Applied her method to public city permits, registrations, and health filings to surface new restaurants and shops early — scooping the Animate pop-up, Numb, and the Corgi Cafe site.

    [39]

Themes

Works and projects

Appearances

Relations

Claims

Sources

  1. Jane Manchun Wong — personal sitewongmjane.com · subject controlled · webpage · accessed 2026-09-17T00:00:00Z
  2. About — Jane Manchun Wongwongmjane.com · subject controlled · webpage · accessed 2026-09-17T00:00:00Z

    The subject's own biography page; its honors and press lists are self-curated.

  3. Jane Manchun Wong (@wongmjane) on XX · subject controlled · webpage · accessed 2026-09-17T00:00:00Z

    Her primary publication channel for unreleased-feature findings.

  4. Jane Manchun Wong (@wongmjane) on ThreadsThreads · subject controlled · webpage · accessed 2026-09-17T00:00:00Z

    Bio at access time reads 'hacker, writer, engineer, builder — prev: Threads, Instagram, startups'.

  5. Waymo Is Working on a Gemini AI Assistant. Here's the System Promptwongmjane.com · 2025 · first person · article · accessed 2026-09-17T00:00:00Z
  6. Messenger Rooms Bug Bounty Write-upwongmjane.com · 2020 · first person · article · accessed 2026-09-17T00:00:00Z
  7. Facebook hides like counts in experiment, toowongmjane.com · 2019 · first person · article · accessed 2026-09-17T00:00:00Z
  8. Personal News — I've joined Meta to work on Threads, an app built by @instagram!Threads · 2023 · first person · webpage · accessed 2026-09-17T00:00:00Z

    Her own announcement of the Meta hire, posted the day Threads launched.

  9. Personal news: I'm joining a startup in Los Angeles as a senior software engineer!Threads · 2024 · first person · webpage · accessed 2026-09-17T00:00:00Z

    Cited by Wikipedia with this date; the post returned unavailable at access time, and Wikipedia's article text says December 2024.

  10. Jane Manchun Wong — Engineer, security researcherUses This · 2020 · interview · article · accessed 2026-09-17T00:00:00Z
  11. My Internet: Jane Manchun WongEmbedded · 2022 · interview · article · accessed 2026-09-17T00:00:00Z
  12. Inside China Tech: The woman 'scooping' apps and exposing the secrets of Facebook, Twitter and moreSouth China Morning Post · 2018 · interview · audio · accessed 2026-09-17T00:00:00Z
  13. Q&A with the hacker that scooped Twitter's in-app tipping featureIndie Hackers · interview · article · accessed 2026-09-17T00:00:00Z

    Q&A in which she describes starting app research during college finals and names bug-bounty hunter Philippe Harewood as an influence.

  14. 「拆app達人」黃文津 揭露隱藏功能 推動更善良網絡世界Ming Pao · 2021 · interview · article · accessed 2026-09-17T00:00:00Z

    Chinese-language feature interview; listed on the subject's own press page.

  15. USD978895S1 — Display screen with graphical user interfaceUSPTO via Google Patents · 2023 · primary record · webpage · accessed 2026-09-17T00:00:00Z

    Twitter, Inc. design patent; her tweeted screenshot of an unreleased feature is cited as prior art.

  16. Threads Web — Best Mobile User Interface, 2024 Webby AwardsWebby Awards · 2024 · primary record · webpage · accessed 2026-09-17T00:00:00Z

    Awarded to the Threads Web product; Wong lists it among her honors as a member of the Threads team.

  17. Jane Manchun Wong — Forbes 30 Under 30 profileForbes · primary record · webpage · accessed 2026-09-17T00:00:00Z

    Forbes's official profile for its 2022 30 Under 30: Social Media list, published December 2021.

  18. Outside LLMs — AI & Music Hackathon at Outside LandsDevpost · 2025 · primary record · webpage · accessed 2026-09-17T00:00:00Z

    Hackathon page listing her as a judge.

  19. Jane Manchun WongWikipedia · reference · article · accessed 2026-09-17T00:00:00Z
  20. Jane Manchun Wong (Q63385151)Wikidata · reference · dataset · accessed 2026-09-17T00:00:00Z
  21. Jane Manchun Wong: The woman scooping Silicon ValleyBBC News · 2019 · reporting · article · accessed 2026-09-17T00:00:00Z
  22. This 24-year-old finds unreleased features in your favorite appsCNN Business · 2019 · reporting · article · accessed 2026-09-17T00:00:00Z
  23. Facebook employees turn to Hong Kong hacker for info on internal projectsCNBC · 2019 · reporting · article · accessed 2026-09-17T00:00:00Z
  24. Jane Wong uncovers hidden app features tech giants want to keep secretSouth China Morning Post · 2018 · reporting · article · accessed 2026-09-17T00:00:00Z
  25. Meet the 23-year-old engineering detective behind the biggest leaks in techThe Next Web · 2018 · reporting · article · accessed 2026-09-17T00:00:00Z
  26. This rogue hacker digs up unreleased features on Instagram, Facebook, and SpotifyBusiness Insider · 2020 · reporting · article · accessed 2026-09-17T00:00:00Z
  27. Spilling Silicon Valley's secrets, one tweet at a timeMIT Technology Review · 2022 · reporting · article · accessed 2026-09-17T00:00:00Z
  28. Twitter may be working on Twitter Blue, a subscription service that would cost $2.99 per monthThe Verge · 2021 · reporting · article · accessed 2026-09-17T00:00:00Z
  29. Twitter mulling paid service called Twitter Blue, finds researcherThe Guardian · 2021 · reporting · article · accessed 2026-09-17T00:00:00Z
  30. Twitter's upcoming edit feature may keep track of tweet historyThe Verge · 2022 · reporting · article · accessed 2026-09-17T00:00:00Z
  31. Figma is working on an AI app makerThe Verge · 2025 · reporting · article · accessed 2026-09-17T00:00:00Z
  32. Waymo is testing Gemini as an in-car AI assistant in its robotaxisTechCrunch · 2025 · reporting · article · accessed 2026-09-17T00:00:00Z
  33. The Verge Installer No. 95 — Screen ShareThe Verge · 2025 · reporting · article · accessed 2026-09-17T00:00:00Z

    Screen-share feature in which she recommends a photo-browsing tool.

  34. Meta lays off employees across multiple teamsTechCrunch · 2024 · reporting · article · accessed 2026-09-17T00:00:00Z
  35. Meta is laying off employees at WhatsApp, Instagram, and moreThe Verge · 2024 · reporting · article · accessed 2026-09-17T00:00:00Z
  36. Meta lays off staff at WhatsApp and Instagram to align with 'strategic goals'Associated Press · 2024 · reporting · article · accessed 2026-09-17T00:00:00Z
  37. Facebook Is Taking Aim at LinkedIn Again By Testing a Résumé FeatureAdweek · 2017 · reporting · article · accessed 2026-09-17T00:00:00Z
  38. SF 100 List — Jane Manchun WongThe San Francisco Standard · 2025 · reporting · webpage · accessed 2026-09-17T00:00:00Z

    SF 100 'The Thinkers' entry: 'she finds big tech's cheat codes, and she's happy to share them.'

  39. The Waggle: 'There's a new sleuth in town' (SF openings radar)The San Francisco Standard · 2026 · reporting · article · accessed 2026-09-17T00:00:00Z

    One item in the paper's gossip column reports her permit-scanning 'openings radar' for new San Francisco restaurants and shops.

  40. wongmjane.com — Wayback Machine capture, September 28, 2019Internet Archive · 2019 · archive · webpage · accessed 2026-09-17T00:00:00Z

    Capture of her site near the peak of the daily-scoop era, before the Meta years.

Coverage and method

Scope as of
Coverage supplied by the publisher
  • biography
  • work
  • method
  • beliefs
  • media
  • career
Method
public-person-index-v1
Tool
soulscrape
Contributors
  • Soulscrape research workflow
Assembled
Human review
No review status or review date is supplied. An assembly timestamp does not establish human review.
Open questions
See the supplied open questions

Open questions