# David (@justddev) on x

- id: koinon:creator:x_justddev
- url: https://koinonlink.com/kol/x/justddev
- schema_version: 1.4

## Identity
- platform: x
- handle: justddev
- platform_url: https://twitter.com/justddev
- entity_type: creator
- person_id: Cross-platform identity not resolved for this creator.

## Reach
- followers: 5119
- following: 479
- posts_total: 6812
- posts_observed: 6
- posts_per_day: 11.625
- account_age_days: 586
- verified: true
- size_tier: nano

## Engagement
- status: peak_post_only
- peak_post_engagement_rate: 0.0084
- best_post_interactions: 43
- measurement_source: x_post_interactions
- measurement_formula: interactions on one post — likes, or likes + reposts + replies depending on the discovery path (the two are not distinguishable in the stored data)
- comparable_pool: peak_interactions
- status_note: We have only the single best observed post, so no mean exists. peak_post_engagement_rate is an UPPER BOUND, systematically higher than an average — never compare it against an average rate.
- unit_note: engagement_rate and peak_post_engagement_rate are ratios (0-1); avg_interactions_per_post and best_post_interactions are absolute counts. Read status before reading any number: a null rate has several different causes and status says which one applies here.

## Content
- category: software
- subcategory: app
- category_confidence: 0.95
- category_source: derived_from_recent_content
- topics: iOS app development, side project building, marketing automation, indie hacking, game development experiments
- bio: building iOS apps until they pay more than my day job. documenting as I go

## Audience (inferred)
- status: present
- description: Indie iOS developers and side-project builders who have a 9-5 job and document their app launches and experiments
- roles: dev
- seniority: practitioner
- pain_points: App Store rejections delaying releases, Zero views on new accounts hurting growth, Choosing the right tech stack for side projects, Manually scaling marketing without reliable tools
- posts_analysed: 6
- confidence: 0.4

## Commercial (inferred)
- audience_buyer_fit: 0.9
- promotion_intent: 0.8
- open_to_collaboration: false
- contact: Koinon does not publish creator contact details.

## Quality signals
- authenticity_score: 70
- authenticity_basis: engagement_observed
- credibility_score: 70
- flagged_for_review: false
- koinon_bd_grade: A — measures Koinon partner-outreach fit, not creator quality
- interpretation: Signals for triage, not verdicts. A flag means the profile is worth a manual check.

## Evidence
- [x_justddev#b37421ea] is there a better way to start friday than hitting the gym? don’t think so https://t.co/ctq7e2JBXh (https://twitter.com/justddev)
- [x_justddev#9c340602] decided to join shipaton this year first time ever building a game god this is fun https://t.co/P8V81rD9Ri
- [x_justddev#849d9e3a] it’s been a while since I built anything that wasn’t a mobile app outside my 9–5 is next.js still the go-to or did I sleep through another framework taking over? https://t.co/N0BSxx1W4K
- [x_justddev#2c9e2c36] experimenting with marketing on autopilot again the results were pretty promising last time wanna try scaling it a bit further might even build my own scheduler to bring the costs down to $0 https://t.co/St01Zf8Mzm
- [x_justddev#e2cdf17e] the app update is finally approved! took a week and 3 rejections but we got there pretty curious to see if all these changes make any difference to conversions https://t.co/U3ADxmhety
- [x_justddev#e977c127] hit 0 views for the third time on a fresh US account the other two accounts on the same device ar

## Provenance
Every inferred field below carries how it was produced. Facts stay facts; inferences stay inferences.

- audience.description: source_type=ai_inferred, confidence=0.4, freshness_days=77, method=llm_persona_from_recent_content
- audience.roles: source_type=ai_inferred, confidence=0.4, freshness_days=77, method=llm_persona_from_recent_content
- audience.seniority: source_type=ai_inferred, confidence=0.4, freshness_days=77, method=llm_persona_from_recent_content
- commercial.audience_buyer_fit: source_type=ai_inferred, confidence=0.6, freshness_days=77, method=llm_scorer — Relative signal within Koinon indexing, not a market-wide score.
- commercial.promotion_intent: source_type=ai_inferred, confidence=0.6, freshness_days=77, method=llm_scorer
- quality.anomaly_flags: source_type=heuristic, confidence=0.5, freshness_days=111, method=profile_snapshot_and_engagement_ratio_heuristic — Means "worth a manual check", NOT confirmed fraud. Flags can be wrong and are not a verdict about the person.
- quality.authenticity_score: source_type=heuristic, confidence=0.5, freshness_days=77, method=Profile-shape heuristic from a single snapshot (follower count, following ratio, account age, posting volume, verification), reduced for engagement red flags where post engagement was collected. Where only a follower count is available the score saturates at 58. — The input set differs by platform; do not compare this score across platforms.
- quality.koinon_bd_grade: source_type=ai_inferred, confidence=0.5, freshness_days=111, method=llm_partner_fit_classifier + fit_score >= 0.6 AND authenticity >= 60 => A; fit_score >= 0.4 AND authenticity >= 45 => B; else C. authenticity < 30 or a promotional-pattern flag => quarantine. — Koinon partner-outreach fit, not creator quality.
- reach.followers: source_type=observed, confidence=0.95, freshness_days=111, method=platform_profile

## Freshness
- profile_checked_days_ago: 111
- content_analysed_days_ago: 77
- audience_updated_days_ago: 77

## AI retrieval
- indexing_requests: 9
- user_triggered_requests: 0
- note: Being indexed in bulk is not the same as being retrieved to answer a question.

## This profile
- Claim or correct: https://koinonlink.com/claim?k=x_justddev
- Request removal: https://koinonlink.com/claim?k=x_justddev
- Terms: https://koinonlink.com/for-ai