# Carlos Alonso | Software Engineering (@calonso) on x

- id: koinon:creator:x_calonso
- url: https://koinonlink.com/kol/x/calonso
- schema_version: 1.4

## Identity
- platform: x
- handle: calonso
- platform_url: https://twitter.com/calonso
- website: https://icanfaang.com/fatal-interview-mistakes-free-guide/
- entity_type: creator
- person_id: Cross-platform identity not resolved for this creator.

## Reach
- followers: 1035
- following: 356
- posts_total: 3041
- posts_observed: 1
- posts_per_day: 0.463
- account_age_days: 6573
- verified: false
- size_tier: nano

## Engagement
- status: peak_post_only
- peak_post_engagement_rate: 0.00097
- best_post_interactions: 1
- 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: devtools
- category_confidence: 0.9
- category_source: derived_from_recent_content
- topics: high-paying tech jobs, remote-friendly tech roles, career transitions for software engineers, tech salary benchmarks, job application strategies, skills in backend, infra, and AI systems
- bio: I help you land a 6-figure tech job and perform at the top once you're in, so you have time for what really matters in life. Software @MongoDB Ex @aws & @amazon

## Audience (inferred)
- status: present
- description: Software engineers and tech job seekers aiming for high-paying roles, especially in backend, infrastructure, and AI-related fields
- roles: content
- seniority: practitioner
- pain_points: Applying to too many jobs without getting noticed due to lack of targeting, Struggling to find remote-friendly or international tech roles that match their skill set, Having difficulty negotiating higher salaries without enough market data on compensation, Lacking clear guidance on how to transition between companies effectively to boost pay
- posts_analysed: 6
- confidence: 0.4

## Commercial (inferred)
- audience_buyer_fit: 0.9
- promotion_intent: 0.6
- open_to_collaboration: false
- contact: Koinon does not publish creator contact details.

## Quality signals
- authenticity_score: 48
- authenticity_basis: engagement_observed
- credibility_score: 48
- flagged_for_review: false
- koinon_bd_grade: B — 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_calonso#720d6df6] 10 top tech hot roles this week. EU, US and remote-friendly. Backend, infra, platform, AI, SRE, security and distributed systems. Thread: (https://twitter.com/calonso/status/2072996990548385820)
- [x_calonso#50ceb3cb] 1/7 I applied to every open role at Apple. That was the problem. I thought volume would make me visible. Instead, it made me easy to ignore.
- [x_calonso#16a86fe0] 10 top tech hot roles this week. EU / US / remote-friendly roles across: Backend. Infra. Platform. AI infra. SRE. Distributed systems. Security. Data platforms. Here’s the list:
- [x_calonso#a184d174] Cambiar de empresa es la forma más rápida de incrementar tu salario. Ojo eso si con no tener tiempo suficiente para adquirir experiencia relevante,puede pasar factura en las entrevistas más adelante. Cambiar en cuanto ya se ha aprendido la mayoría de lo que esa empresa ofrece.
- [x_calonso#33160699] You trade time for money, right? Why not maximise it? It all starts with this amazing salaries report for tech in Spain that @borjaperfra recently publishe

## 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=20, method=llm_persona_from_recent_content
- audience.roles: source_type=ai_inferred, confidence=0.4, freshness_days=20, method=llm_persona_from_recent_content
- audience.seniority: source_type=ai_inferred, confidence=0.4, freshness_days=20, method=llm_persona_from_recent_content
- commercial.audience_buyer_fit: source_type=ai_inferred, confidence=0.6, freshness_days=80, 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=80, method=llm_scorer
- quality.anomaly_flags: source_type=heuristic, confidence=0.5, freshness_days=112, 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=80, 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=112, 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=112, method=platform_profile

## Freshness
- profile_checked_days_ago: 112
- content_analysed_days_ago: 80
- audience_updated_days_ago: 20

## AI retrieval
- indexing_requests: 12
- 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_calonso
- Request removal: https://koinonlink.com/claim?k=x_calonso
- Terms: https://koinonlink.com/for-ai