MLA 006 Salaries for Data Science & Mach...

Global and Regional Salary Differences

• Median Global Salary: $90,000 USD, up from $85,000 the previous year.
• Regional Breakdown:
  • United States: $112,000 median; California leads at $134,000.
  • Western Europe: $57,000—about half the US median.
  • Australia & New Zealand: Second after the US.
  • Eastern Europe: Below $30,000.
  • Asia: Wide interquartile salary range, indicating high variability.

Demographic and Personal Factors

• Gender: Women's median salaries are $8,000 lower than men's. Women make up 20% of respondents but are increasing in number.
• Age & Experience: Higher age/experience correlates with higher salaries, but the proportion of older professionals declines.
• Education: Nearly all respondents have at least a master's; PhD holders earn only about $5,000 more than those with a master's.
• Negotiation Skills: Self-reported strong salary negotiation skills are linked to $45,000 higher median salaries (from $70,000 for lowest to $115,000 for highest bargaining skill).

Industry, Company, and Role

• Industry Impact:
  • Highest salaries found in search/social networking and media/entertainment.
  • Education and non-profit offer the lowest pay.
• Company Age & Size:
  • Companies aged 2–5 years offer higher than average pay; less than 2 years old offer much lower salaries (~$40,000).
  • Large organizations generally pay more.
• Job Title:
  • "Data scientist" and "data analyst" titles carry higher medians than "engineer" titles by around $7,000.
  • Executive titles (CTO, VP, Director) see the highest pay, with CTOs at $150,000 median.

Tools, Languages, and Technologies

• Operating Systems:
  • Windows: 67% usage, but declining.
  • Linux: 55%; Unix: 18%; macOS: 46%; Unix-based systems are rising in use.
• Programming Languages:
  • SQL: 64% (most used for database querying).
  • Python: 63% (most popular procedural language).
  • R: 54%.
  • Others (Java, Scala, C/C++, C#): Each less than 20%.
  • Salary difference across languages is minor; C/C++ users earn more but not enough to outweigh the difficulty.
• Databases:
  • MySQL (37%), MS SQL Server (30%), PostgreSQL (28%).
  • Popularity of the database has little impact on pay.
• Big Data and Search Tools:
  • Spark: Most popular big data platform, especially for large-scale data processing.
  • Elasticsearch: Most common search engine, but Solr pays more.
• Machine Learning Libraries:
  • Scikit-learn (37%) and Spark MLlib (16%) are most used.
• Visualization Tools:
  • R's ggplot2 and Python's matplotlib are leading choices.

Key Salary Differentiators (per Machine Learning Analysis)

• Top Predictors (explaining ~60% of salary variance):
  • World/US region
  • Experience
  • Gender
  • Company size
  • Education (but amounting to only ~$5,000 difference)
  • Job title
  • Industry
• Lesser Impact: Specific tools, languages, and databases do not meaningfully affect salary.

Summary Takeaways

• The greatest leverage for a higher salary comes from geography and individual negotiation capability, with up to $45,000 differences possible.
• Role/title selection, industry, company age, and size are also significant, while mastering the most commonly used tools is essential but does not strongly differentiate pay.
• For aspiring data professionals: focus on developing negotiation skills and, where possible, optimize for location and title to maximize earning potential.