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Noah Sheldon
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Hire Python Developer in London

Expert Python development services for web applications, data science, and AI systems

As a senior Python developer based in London, I specialize in building scalable, efficient applications across web development, data science, and AI domains. With over 6 years of experience working with companies like BNP Paribas, Definitive Healthcare, and Principal Financial, I bring proven expertise to your Python development needs.

Why Choose My Python Development Services

  • Proven Track Record: Successfully delivered projects for top financial and healthcare institutions
  • Full-Stack Expertise: Python backend development integrated with modern frontend technologies
  • Domain Knowledge: Deep experience in fintech, healthcare, and SaaS applications
  • Best Practices: Clean code, testing, and documentation following industry standards
  • Scalability Focus: Architecture designed for growth and performance

Python Development Expertise

My Python development skills span multiple frameworks and use cases:

Web Development

  • FastAPI: Modern, fast web API development with automatic documentation
  • Django: Comprehensive full-stack web applications with ORM and admin interface
  • Flask: Lightweight applications requiring custom architecture
  • Async Frameworks: High-performance asynchronous applications

Data Science and Analysis

  • Pandas & NumPy: Data manipulation and numerical computing
  • Scikit-learn: Machine learning and predictive modeling
  • Matplotlib & Seaborn: Data visualization and reporting
  • Scientific Computing: Complex mathematical and statistical analysis

AI and Machine Learning

  • TensorFlow & PyTorch: Deep learning model development and deployment
  • OpenAI Integration: LLM applications and AI agents
  • Natural Language Processing: Text analysis and language models
  • Computer Vision: Image recognition and processing systems

Data Pipelines and ETL

At Definitive Healthcare, I built sophisticated data pipelines using Python for healthcare analytics, demonstrating my ability to handle complex data processing workflows at scale.

Project Examples

BNP Paribas - Trade Compression System

Built Python-based algorithms for financial trade optimization, processing thousands of trades per second with sub-second latency. The system reduced capital requirements by optimizing financial positions while maintaining risk controls.

Definitive Healthcare - ML Data Pipelines

Architected and developed Python-based machine learning pipelines to process complex healthcare datasets. The system handled millions of records daily with 99.9% accuracy, enabling advanced analytics for healthcare clients.

xThreads.app - AI Content Generation

Implemented Python-based AI systems for automated social media content creation. The system uses OpenAI models to generate brand-consistent content while maintaining quality and engagement metrics.

Python Development Services Offered

Custom Application Development

From web applications to data processing systems, I build custom Python solutions tailored to your specific business needs. My approach focuses on maintainability, performance, and scalability.

API Development and Integration

I create robust APIs that connect systems and enable efficient data flow. Whether building RESTful services or GraphQL endpoints, I ensure your APIs are secure, performant, and well-documented.

Data Science and Analytics Solutions

Transform your data into actionable insights with custom analytics solutions. I build end-to-end data science workflows including data processing, modeling, and visualization.

AI and Machine Learning Implementation

Implement cutting-edge AI solutions to solve complex business problems. From predictive modeling to natural language processing, I help you leverage machine learning for competitive advantage.

Development Process

1. Requirements Analysis

Understanding your business needs and technical requirements to define the optimal Python solution for your use case.

2. Architecture Design

Creating a scalable architecture that uses the right Python frameworks and tools for your specific requirements.

3. Development and Testing

Following test-driven development practices with comprehensive automated testing to ensure code quality and reliability.

4. Deployment and Monitoring

Implementing CI/CD pipelines and monitoring solutions to ensure your application runs smoothly in production.

Python Stack and Technologies

  • Frameworks: FastAPI, Django, Flask, AIOHTTP
  • Databases: PostgreSQL, MongoDB, Redis, SQLAlchemy
  • Deployment: Docker, Kubernetes, AWS, Google Cloud
  • Testing: Pytest, Unittest, Integration testing
  • DevOps: Jenkins, GitHub Actions, Monitoring (DataDog, Prometheus)

Engagement Models

  • Full-Project Development: Complete project ownership from conception to deployment
  • Team Augmentation: Join your existing team as a senior Python developer
  • Consulting: Technical guidance and architecture reviews
  • Contract Work: Fixed-duration engagements for specific deliverables

Availability and Next Steps

I am currently available for freelance and contract Python development projects in London. Whether you need a complete web application, a machine learning system, or data science solution, I can help you achieve your goals.

Contact me today to discuss your Python development needs and how my expertise can help your business succeed.

© 2026 Noah Sheldon. All rights reserved.

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