Stack Exchange Network

Stack Exchange network consists of 174 Q&A communities including Stack Overflow, the largest, most trusted online community for developers to learn, share their knowledge, and build their careers.

Visit Stack Exchange
Make your voice heard. Take the 2019 Developer Survey now
6,920
reputation
1
17
26

doug

i build Systems & Tools for Analysis, Prediction, Visualization, & Simulation.

i also design, code, and deploy complete distributed and (horizontally) scalable Machine Learning-based applications (e.g., anti-fraud filter, recommendation engine, monitoring/anomaly detectors), often in the service layer decoupled from the main app.

Techniques:

  • Machine Learning
    • decision tree (CART/C4.5) & random forest
    • deep learning (multi-layer perceptron)
    • support vector machine (SVM/SVR)
    • kNN/kdtree
    • probabilistic graphical models (eg, Bayesian Net, Markov Random Field)
  • Dimension Reduction Techniques
    • spectral decomposition (PCA & kPCA, kLDA)
    • Kohonen Map (self-organizing map)
  • ETL pipelines
    • akka stream
    • Apache Spark
    • Kafka/Zookeeper
  • Social Network Analysis & Visualization
    • using graph theoretic techniques for
      • community detection
      • identify members essential for network health/growth
      • identify nascent sub-communities
      • particular fluency in NetworkX, GraphViz
  • Analysis & Modeling of Time Series
    • decomposition
    • forecasting
    • anomaly detection
  • Optimization
    • combinatorial optimization
    • csp
  • Numerical Methods
    • matrix decomposition
    • monte carlo techniques
    • Gaussian quadrature,
    • finite difference methods
  • Persistence
    • redis
    • postgres
  • Geo-Spatial Data Modeling, Persistence, & Computation
    • postgis (storage, query, computation)

toolchain:

  • scala
  • scalaz
  • akka & akka-stream
  • python
  • NumPy + SciPy + Matplotlib + pandas
  • cython
  • R

  • vagrant

  • git (& gitHub)

  • travis ci

No recruiters

23
answers
4
questions
~951k
people reached

Top Tags (51)

Score 395
Posts 3
Posts % 11
Score 78
Posts 4
Score 28
Posts 3
Score 15
Posts 3
Score 13
Posts 3
Score 13
Posts 2

Top Posts (27) All Questions Answers | Votes Newest

View all questions and answers

Badges (44)

Gold

1

Rarest

Silver

17

Rarest

Bronze

26

Rarest