Hire the Best Python Numpy Developers in California

More than 3,000 reviews on G2
Rating is 4.5 out of 5.
4.5/5
of Upwork by G2 peer reviewers
Masaki N.

San Diego, California

$90/hr
5.0
14 jobs

Let's make the world healthier! I am a data/research scientist with 10+ years of deep involvement in neuroscience, biomedical engineering, and clinical research. My background includes digital signal processing, machine learning, statistical modeling & testing, and research design. Successfully-completed projects: 1. Automatic EEG artifact detection and editing 2. Time-series action recognition using acoustic and accelerometric data 3. Heartbeat-related ERP (HEP) visualization 4. ABX testing on food samples 5. Designing wearable sensors 6. Human performance analysis using PPG and GSR data 7. Heart-rate variability (HRV)-based clinical diagnosis 8. Implementing an online EEG/SSVEP-based brain-computer interface (BCI) 9. Automatic sleep-stage classification using deep neural network 10. Unsupervised clustering (Kmeans, UMAP) clinical data for individualized medicine 11. Academic research (50+ peer-reviewed articles, 3000+ citations, 100+ peer-reviews) Skillset: - Programming: Python, MATLAB, R, BigQuery - ML libraries: Scipy, Scikit-Learn, Pytorch, Pandas, Numpy - Data visualization: Matplotlib, ggplot2, Tableau - Electrophysiology: EEG (research-grade/wearable), ECG, EMG, EOG, PPG, GSR, accelerometer - Data acquisition: LabStramingLayer (LSL) - EEG analysis: EEGLAB, MNE - Version control: Github - Editing: LaTeX, BibTex

  • Python
  • Logistic Regression
  • Machine Learning
  • Python Scikit-Learn
  • MATLAB
  • Linear Regression
  • R
  • Tableau
  • Time Series Analysis
  • A/B Testing
  • Data Analysis
  • Data Visualization
  • Statistical Analysis
  • Scientific Writing
  • Biomedical Engineering
Rosany T.

San Clemente, California

$75/hr
4.7
52 jobs

⌚ Available from 6am - 11 pm Pacific time 🚀 Skyrocket Your Business with Cutting-Edge AI Solutions! 🚀 🇺🇸🇪🇸 Bilingual I help businesses transform AI from an experiment into a measurable business advantage. Whether you need an AI-powered chatbot, a production-grade RAG system, intelligent automation, predictive analytics, or a scalable machine learning platform. I’ve worked across Generative AI, Data Science, Machine Learning, Analytics, and Data Engineering to help organizations automate workflows, improve decision-making, reduce operational costs, and create new revenue opportunities. What I Can Help You Build 🤖 Generative AI & LLM Solutions * RAG (Retrieval-Augmented Generation) systems * AI Agents & multi-agent workflows * GPT-4, Gemini, Claude, Llama, and Mistral applications * Custom copilots and knowledge assistants * Prompt engineering and model optimization * LLM evaluation, monitoring, and deployment 💬 AI Chatbots & Virtual Assistants * Customer support automation * Internal knowledge assistants * Conversational AI platforms * Dialogflow, Vertex AI, Botpress, and RASA solutions * CRM, API, and database integrations 📊 Data Science & Advanced Analytics * Predictive modeling and forecasting * Customer and business intelligence analytics * Dashboard development (Power BI, Tableau, Looker Studio) * Statistical analysis and experimentation * End-to-end machine learning pipelines 🔁 Data Engineering & Cloud Architecture * ETL/ELT pipeline development * Data warehouses and lakehouses * Snowflake, BigQuery, Redshift, and Databricks * Data quality, governance, and orchestration * Scalable cloud-native architectures 👁️ Computer Vision & NLP * OCR and document intelligence * Image classification and object detection * Sentiment analysis and text mining * Custom NLP workflows and automation Core Technologies AI & ML: OpenAI, GPT-4, Gemini, Claude, Llama, Mistral, LangChain, Hugging Face, TensorFlow, PyTorch Data & Analytics: Python, SQL, Spark, Tableau, Power BI, Looker Studio, dbt Cloud & Data Platforms: AWS, Google Cloud, Azure, Snowflake, BigQuery, Redshift, Databricks If you’re looking for a partner who can bridge business goals with technical execution and deliver production-ready AI solutions, let’s discuss your project.

  • Python
  • Data Analytics
  • Statistical Analysis
  • Machine Learning
  • Computer Vision
  • Deep Learning
  • Natural Language Processing
  • Generative AI
  • Generative AI Prompt Engineering
  • LLM Prompt Engineering
  • ChatGPT
  • Generative Model
  • Generative AI Prompt
  • Edge AI
  • JavaScript
Eugene K.

San Diego, California

$37/hr
4.9
96 jobs

I have 8 years of experience in Python development and my skills are listed below: - Web scrapers, bots, automation, web automation, scripting, API scripts, ETL; - Data extraction, data cleaning, data processing, data transformation; - Backend development, web apps with Flask, Django; - Frontend coding with HTML, CSS, Js; - Covering UI with selenium tests.

  • Python
  • Selenium
  • Data Scraping
  • pandas
  • JavaScript
  • API
  • Data Processing
  • Data Transformation
  • Flask
  • MySQL
  • Bot Development
  • Automation
  • SciPy
  • Matplotlib
  • Python Scikit-Learn
Michael S.

Belmont, California

$200/hr
4.6
22 jobs

Machine learning scientist/engineer with hands-on expertise in deep learning, computer vision, time series, data analysis, computational science, mathematical modeling, computer simulations, algorithm development, and software development. ML -- computer vision: segmentation, classification, object detection, e.g., ViT, R-CNN, unet, yolo ML -- time-series: recurrent neural networks, convolutional neural networks, e.g., LSTM, GRU, CNN ML -- general: classification, regression, prediction Development of end-to-end ML pipelines: pre-processing, model development, post-processing, model evaluation, hyper-parameter turning, model deployment Applications: Medical imaging and devices, biofluids, fluid dynamics, combustion, renewable energy, computational engineering. Technical/non-technical writing: Patents, proposals, white papers, peer-reviewed papers, presentations. Education: PhD -- Applied Math (Cornell), Postdoctoral Fellow -- Chemical Engineering (MIT) Programming: Python, C++, Java, Matlab Machine Learning: Keras, Pytorch, Scikit-learn, TensorFlow NLP: NLTK, OpenNLP Computer Vision: OpenCV, Pillow, Pydicom, SimpleITK Data Science: Matplotlib, Numpy, Pandas, Scipy, Seaborn CAD/CFD: Ansys, Gmsh, OpenCascade, OpenFOAM, Overture, Rhino3D Misc: Amazon/Google cloud, DICOM, Git, Jira, UNIX tools/admin

  • Python
  • Deep Learning
  • Machine Learning
  • TensorFlow
  • Computer Vision
  • Python Scikit-Learn
  • SciPy
  • Image Processing
  • Object Detection
  • Convolutional Neural Network
  • Mathematics
  • Algorithm Development
  • Computational Fluid Dynamics
  • DICOM
Micah L.

Encinitas, California

$275/hr
5.0
47 jobs

Enterprise Software Architect and Fractional CTO passionate about solving intricate problems and skillfully mastering complex technical challenges. Creative thinker innovating digital tools, building blocks, and abstractions that segue into powerful, connected, and elegant systems. Expert at solving multifaceted, robust technical difficulties while maintaining a friendly, responsive, and business-oriented approach to projects. Understands both the full technical scope and business-side of obstacles with a knack for big-picture problem solving. Expert-Vetted on UpWork and Top Rated Plus with a 100% Job Success Score.

  • Python
  • Performance Optimization
  • Django
  • Celery
  • Software Consultation
  • SQL
  • Software Architecture & Design
  • Application Integration
  • React
  • TypeScript
  • Software Architecture
  • Enterprise Software
  • Enterprise Software Development
  • Enterprise Resource Planning
  • Enterprise Architecture
  • Bot Development
  • Slack
  • PostgreSQL
  • JavaScript
  • Python Asyncio
  • SQLAlchemy
  • Redis
Cameron A.

Oakland, California

$55/hr
4.8
3 jobs

With years of experience in Python, Java, and Linux, I am passionate about leveraging technology to solve complex problems in the realm of data science, machine learning, and web scraping. I specialize in transforming raw data into valuable insights by building efficient workflows for data wrangling, cleaning, and analysis, often using tools like SQL, Jupyter, and Matplotlib. Since earning my BA, I have deepened my knowledge in computer science, earning certifications in topics such as machine learning and Python while working on advanced Java projects with frameworks like Spring and Spring Boot. Key Skills & Expertise: Web Scraping & Automation: Proficient in building scalable web scraping solutions using tools like Scrapy, with extensive experience in handling large-scale data extraction projects. Natural Language Processing (NLP): Expertise in designing custom pipelines for Named Entity Recognition (NER) and fine-tuning pre-trained NLP models using frameworks such as Hugging Face and GPT technologies. Machine Learning: Hands-on experience with supervised learning, data preprocessing, model training, and deployment, ensuring that machine learning models are optimized for real-world use cases. Cloud Infrastructure: Adept at deploying scalable data processing pipelines and distributed tasks on cloud platforms like AWS, ensuring seamless integration and efficient data extraction at scale. Data Analysis & Visualization: Experienced in wrangling and analyzing large datasets, delivering actionable insights using SQL, Jupyter, Matplotlib, and other visualization tools. What I Bring to the Table: A unique blend of software development, data engineering, and machine learning expertise. A focus on delivering high-quality, scalable solutions for complex data problems. A commitment to continuous learning and staying up-to-date with the latest tools and technologies in the field. Let’s work together to turn your data into actionable insights!

  • Python
  • SQL
  • IBM SPSS
  • Machine Learning
  • Arduino
  • PyCharm
  • Git
  • Java
  • Matplotlib
  • JetBrains IntelliJ IDEA
  • Jupyter Notebook
  • Software
  • Spring Boot
  • Linux
  • Docker

How it works

Post a job for freePost a job

Tell us what you need. Create your own job post or generate one with AI then filter talent matches.

Hire top talent fast

Consult, interview, and hire quickly, so you can meet the freelancers you're excited about.

Collaborate easily

Use Upwork to chat or video call, share files, and track project progress right from the app.

Payment simplified

Manage payments in one place with flexible billing options. Only pay for approved work, hourly or by milestone.

Don't just take our word for it

How do I hire a Python Numpy Developer in California on Upwork?

You can hire a Python Numpy Developer in California on Upwork in four simple steps:

  • Create a job post tailored to your Python Numpy Developer project scope. We'll walk you through the process step by step.
  • Browse top Python Numpy Developer talent on Upwork and invite them to your project.
  • Once the proposals start flowing in, create a shortlist of top Python Numpy Developer profiles and interview.
  • Hire the right Python Numpy Developer for your project from Upwork, the world's largest work marketplace.

At Upwork, we believe talent staffing should be easy.

How much does it cost to hire a Python Numpy Developer?

Rates charged by Python Numpy Developers on Upwork can vary with a number of factors including experience, location, and market conditions. See hourly rates for in-demand skills on Upwork.

Why hire a Python Numpy Developer in California on Upwork?

As the world's work marketplace, we connect highly-skilled freelance Python Numpy Developers and businesses and help them build trusted, long-term relationships so they can achieve more together. Let us help you build the dream Python Numpy Developer team you need to succeed.

Can I hire a Python Numpy Developer in California within 24 hours on Upwork?

Depending on availability and the quality of your job post, it's entirely possible to sign up for Upwork and receive Python Numpy Developer proposals within 24 hours of posting a job description.