Python Developer

Title: Software Engineer (Python Developer)

Location: London, UK

Employment Type: Contract

Duration: Long Term

Overview:

We are seeking a skilled Software Engineer with strong programming expertise in Python and hands-on experience in data manipulation, analysis, and software engineering best practices. The ideal candidate will be passionate about clean, maintainable code and capable of building scalable, efficient solutions.

Key Responsibilities:

• Develop, test, and maintain Python-based applications and scripts.
• Perform data cleaning, transformation, and analysis using Pandas and NumPy.
• Design and implement modular, reusable, and testable code following best practices.
• Collaborate with cross-functional teams to integrate data and software components.
• Utilize version control tools (Git) for code collaboration and management.
• (Optional) Build and enhance interactive dashboards using Plotly Dash for data visualization.
• Work with REST APIs to fetch and send data between front-end and back-end systems.

Required Skills & Experience:

1. Python Programming

• Strong understanding of functions, classes, and object-oriented programming (OOP).
• Experience with list comprehensions, generators, and error handling.
• Proficiency in managing virtual environments and package dependencies using tools like pip and venv.

2. Data Manipulation & Analysis

• Hands-on experience with Pandas and NumPy (knowledge of Polars is a plus).
• Skilled in data cleaning, preprocessing, handling missing values, and performing complex data operations such as grouping, merging, pivoting, and aggregations.
• Working knowledge of SQL for data extraction and manipulation.

3. Software Engineering Best Practices

• Strong grasp of version control (Git) workflows.
• Experience writing unit tests (e.g., using pytest).
• Ability to write clean, well-documented, and modular code.
• Familiarity with linters, code formatters, and documentation standards (docstrings).

4. (Preferred) Plotly Dash

• Experience creating interactive dashboards using Dash and Plotly Graph Objects.
• Proficiency with callbacks, layouts, and component integration (Dropdowns, Sliders, Graphs, Tables).
• Knowledge of HTML/CSS integration within Dash apps.

(Note: Plotly Dash experience is a plus; candidates proficient in Python, Data Manipulation, and Software Engineering practices can learn Dash during the engagement.)