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Katrin T.
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Katrin T.

Ph.D. Mathematician | High-End Technical Writer | Developer Docs

Are you looking for someone who can bridge the gap between complex engineering and crystal-clear documentation? I help technology companies, Tier-1 suppliers, and software teams transform chaotic codebases and intricate systems into structured, high-quality developer docs. As a Ph.D. Mathematician and former Senior Automotive Software Engineer (8+ years of industry experience), I don’t just write—I deeply understand the underlying code, architecture, and regulatory requirements (including ISO 26262 / ASIL B). What I bring to your project: • Docs-as-Code & Frameworks: Expert in the Diátaxis framework, Markdown, and Git-based documentation workflows. • Technical Depth: Professional experience in MATLAB/Simulink, Stateflow, and Python automation (including custom ARXML parsers). • Information Architecture: Transforming complex mathematical algorithms and system workflows into intuitive manuals and API guides. • High Security: Operating from a physically secured, fully encrypted, hardware-firewall-protected remote infrastructure. Proof of Work: Feel free to ask for my public GitHub portfolio, which features production-ready Python automation scripts, proprietary parsers, and live examples of Diátaxis-structured documentation.

🇨🇷Pavas, Costa Rica$55/hr100% JSS5.00 (1)Since Jun 2026

Earnings and projects

MRR
$705

Last 6 months ÷ 5.2 months active (since Jun 2026)

World#63,292 / 412k
🇨🇷Country#94 / 515
Revenue, last 30 days
$0

Last 6 months: $3.7k

Total earnings
$3.7k

Billed in all: $4.2k

World#280,557 / 412k
🇨🇷Country#349 / 515
Per project
$1.8k

$1.8k in the last 6 months

World#81,759 / 412k
🇨🇷Country#160 / 515
Projects, last 6 months
2
100% fixed0% hourly
World#88,918 / 412k
🇨🇷Country#68 / 515
Projects in all
2
100% fixed0% hourly
World#328,886 / 412k
🇨🇷Country#353 / 515

Earnings, last 30 days

$4.2kNothing earned in the last 30 daysBilled in all, before Upwork's fee · drag across the chart to see what was earned in any stretch
$4,150$4,200$4,250$4,300Oct 8Oct 23Nov 7

Skill rankings: Top 9% in Simulink

Ranked by MRR among everyone on Upwork with the skill.

  1. #18Simulink198 freelancers · 🇨🇷 #1Top 9%
  2. #20Markdown88 freelancers · 🇨🇷 #1Top 23%
  3. #37Technical Manual223 freelancers · 🇨🇷 #1Top 17%
  4. #48API Documentation268 freelancers · 🇨🇷 #1Top 18%
  5. #62Software Documentation347 freelancers · 🇨🇷 #1Top 18%
  6. #84Information Architecture723 freelancers · 🇨🇷 #1Top 12%
  7. #86Algorithm Development615 freelancers · 🇨🇷 #2Top 14%
  8. #120Atlassian Confluence604 freelancers · 🇨🇷 #2Top 20%