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Christian R.

Christian R.

Mathematical Optimization Expert (Ph.D.)

Thank you for visiting my profile! I’m looking forward to finding out how I can support you! Summary: + I help SMEs leverage optimization technology. + Over 14 years of experience applying operations research (OR) methods. + Deep expertise in building optimization-based solutions for hospitals, pharmacies, airlines, and airports. + Ph.D. from the Technical University of Munich (TUM). + Successfully worked as an OR expert in management consulting (Bain & Company). + Publications in top scientific journals (e.g., Transportation Science). + Native-like English, Native German, fluent Spanish. Favorite Problems: + Inventory/procurement analytics and optimization + Workforce planning and personnel scheduling + Scheduling + Network design optimization Methodological Skills: + Process simulation / digital twins + Demand forecasting + Linear problems (LP) + Integer problems (IP) + Mixed integer linear problems (MILP) + Non-linear problems + Heuristics and Meta-Heuristics + Recurring decisions + Decisions under uncertainty + Markov decision processes (MDP) + Reinforcement Learning (RL) + Dynamic programming + Data extraction, transformation, analysis, and visualization Selected Tools: + Solvers: Gurobi, CPLEX, Google’s OR-Tools, Coin-OR, HiGHS, GEKKO + Simulation: SimPy, SSJ + Machine learning: skikit-learn, XGBoost, PyTorch, TensorFlow + Data processing: Numpy, Pandas, PySpark, KNIME, SQL, Excel + VBA + Data visualization: Tableau, Grafana, Plotly/Dash, Matplotlib + Cloud: Google Cloud Platform (GCP), Amazon Web Services (AWS), Azure Talk soon! Christian

🇵🇾Asuncion, Paraguay$117/hr100% JSS5.00 (22)Since Jan 2021
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Earnings and projects

MRR
$0

Last 6 months ÷ 6

World#33,502 / 412k
🇵🇾Country#22 / 133
Revenue, last 30 days
$0
Total earnings
$114k

Billed in all: $119k

World#33,502 / 412k
🇵🇾Country#22 / 133
Per project
$3.4k
Projects, last 6 months
0
World#209,850 / 412k
🇵🇾Country#78 / 133
Projects in all
34

Across 42 contracts

45% fixed55% hourly
World#87,477 / 412k
🇵🇾Country#21 / 133

Earnings, last 30 days

$119kNothing earned in the last 30 daysBilled in all, before Upwork's fee · drag across the chart to see what was earned in any stretch
$116k$118k$120k$122kOct 8Oct 23Nov 7

Skills