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Yoshio Nomura
Yoshio Nomura

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Building an Extraction Node: Analyzing 400+ HN Job Listings (Python vs Node.js)

The Inefficiency of the Job Market

The modern technical job hunt operates on an asymmetrical information model. Candidates manually process unstructured text across disparate platforms, while corporations utilize automated applicant tracking systems to filter them out. The logical countermeasure is to construct a programmatic extraction pipeline to identify the true market signal.

To bypass the saturated and often misleading postings on mainstream corporate networks, the data source must be raw and developer-centric. This system utilizes the Hacker News "Who is Hiring" thread as the primary target for extraction.

Below is the architectural breakdown of how to build an extraction node to parse, categorize, and synthesize 400+ unstructured job listings into a structured dataset.

1. The Extraction Pipeline

Unstructured text from forums presents a parsing challenge. Traditional regex patterns fail when human formatting is inconsistent. The pipeline must operate in two phases: retrieval and synthesis.

Phase 1: Retrieval

Standard HTML parsing is sufficient for the initial extraction.

Python

import requests
from bs4 import BeautifulSoup
import json

def fetch_hn_thread(item_id: str) -> list:
    """Retrieves all top-level comments from an HN Who is Hiring thread."""
    url = f"https://hacker-news.firebaseio.com/v0/item/{item_id}.json"
    response = requests.get(url).json()

    comments = []
    if 'kids' in response:
        for child_id in response['kids']:
            child_url = f"https://hacker-news.firebaseio.com/v0/item/{child_id}.json"
            child_data = requests.get(child_url).json()
            if child_data and 'text' in child_data:
                comments.append(child_data['text'])

    return comments
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Phase 2: LLM Synthesis

Once the raw HTML strings are retrieved, an LLM endpoint (e.g., Llama 3 or a structured output API) is required to enforce a JSON schema on the unstructured text. This isolates specific variables: Role, Stack, Salary, Remote Status, and Visa Sponsorship.

Python

# System prompt engineering for deterministic output
schema_prompt = """
Extract the following fields from the job posting. 
Return ONLY valid JSON.
{
  "company": "string",
  "role": "string",
  "stack": ["string"],
  "remote": "Global" | "US Only" | "None",
  "visa_sponsorship": boolean,
  "salary_min": number | null,
  "salary_max": number | null
}
"""
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2. The Data Synthesis

Running this pipeline against the February 2026 data yielded over 400+ discrete technical roles. The empirical data contradicts several prevailing market narratives.

The Remote Distribution:

Global Remote: 37%

US-Only Remote: 22%

On-Site / Hybrid: 41%

Conclusion: Remote work is not dead, but it is heavily geofenced. Applying to roles without verifying the geographic constraint results in a 22% baseline failure rate for international candidates.

Visa Sponsorship Metrics:

Only 14% of the extracted listings explicitly offer visa sponsorship.

80% of these sponsorships are localized within AI Infrastructure and Fintech sectors.

The Technology Stack Premium:

Python backend roles currently demonstrate a 15% salary premium over equivalent Node.js roles within this dataset.

The market is signaling a rotation away from generalist JavaScript environments toward specialized, compute-heavy infrastructure languages (Python, Go, Rust).

3. Execution and Deployment

The architecture detailed above is sufficient for any engineer to reconstruct this pipeline locally. Maintaining local scripts for data extraction provides a compounding advantage in market awareness.

For those currently navigating the job market who require the immediate output without configuring the pipeline or absorbing the LLM inference costs, the compiled CSV dataset—containing the 400+ parsed roles, technology stacks, and verified global remote tags—is accessible here:
https://job-scrapper-ai.streamlit.app

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