Senior Python Developer

Senior Python Developer

Python Application Development & AWS

Location: UK (Remote)

Contract Type: Outside IR35

Start Date: November 2026

Rate: Dependent on Experience

Security Clearance: Active SC Clearance is required

Eligibility: Candidates must be based in the UK and hold the right to work in the UK.

Overview

A leading technology consultancy is seeking an experienced Senior Python Developer to join a high-profile digital transformation programme. This role focuses on the design, development and enhancement of modern, cloud-based applications, with Python serving as a core technology across both backend and middleware services.

This is a software engineering position requiring an individual with substantial experience building production-grade applications rather than data science or analytics-focused solutions. Successful candidates will have a strong understanding of application architecture, API development, cloud technologies, testing and modern engineering best practices.

Key Responsibilities

• Design, develop and maintain robust Python applications and services within a modern cloud environment.
• Develop backend and middleware components including business logic, integrations and RESTful APIs.
• Support the integration of front-end applications with backend services to deliver seamless user experiences.
• Translate business and technical requirements into scalable, maintainable and reusable software solutions.
• Design and implement secure, high-performing APIs and enterprise integrations.
• Develop solutions that interact with databases, third-party services and internal business systems.
• Build, deploy and support application components within AWS environments.
• Develop comprehensive automated tests to ensure quality, stability and maintainability.
• Troubleshoot and resolve complex application, integration and performance issues.
• Participate in code reviews and contribute to engineering standards, documentation and best practices.
• Work closely with architects, testers, product owners and other developers within agile delivery teams.
• Provide technical guidance and support to colleagues where appropriate.

Essential Skills & Experience

• Extensive commercial experience developing production-grade applications using Python.
• Strong background building web applications, backend services and middleware solutions.
• Experience designing and developing secure REST APIs, including authentication, authorisation and error handling.
• Strong understanding of multi-tier application architecture and application design principles.
• Experience integrating user interfaces with backend services and APIs.
• Strong AWS experience, including application deployment and operation within cloud-native environments.
• Solid understanding of software engineering principles including object-oriented design, reusable code, design patterns and application security.
• Experience implementing automated testing and developing maintainable, testable software.
• Strong knowledge of Git, CI/CD pipelines and modern development practices.
• Experience working within Agile teams and collaborating across multidisciplinary delivery functions.
• Ability to take ownership of complex technical components from design through development, testing and deployment.

Candidate Profile

The ideal candidate will be a senior software engineer with deep Python expertise and a proven track record delivering enterprise-grade applications. You will be comfortable working across the full software development lifecycle, contributing to architectural decisions, solving complex technical challenges and delivering high-quality solutions within a collaborative cloud-first environment.