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# Python Developer

- **Company:** OpenSourced
- **Location:** Hertfordshire, United Kingdom
- **Experience:** Expert
- **Salary:** £60,000 - £75,000
- **Contract:** Permanent contract
- **Skills:** Clean Code Principles, Automation of Tests, Software Quality, Computer Programming, Databases, Python (Programming Language), Commercial Software, Software Architecture, Software Engineering, Software Systems, Software Quality Assurance (SQA), Test-Driven Development (TDD)
- **Published:** October 29, 2026
- **Apply:** https://www.adzuna.co.uk/jobs/details/5944891623

## About the Role

We're working with an established, technology-driven organisation looking to appoint an experienced Senior Software Engineer (Python) to join its engineering team. This is an opportunity for a talented, hands-on software engineer who enjoys solving complex technical challenges, building reliable and scalable applications, and having a genuine influence on technical decisions.

You'll play a key role in the design, development, testing and ongoing improvement of business-critical software solutions, working closely with engineers, product teams and wider stakeholders. The business is looking for someone who can combine strong Python development skills with sound engineering principles, technical ownership and a collaborative approach., We're particularly interested in experienced software engineers with strong Python expertise and a track record of delivering complex software solutions., * Strong commercial software engineering experience, with Python as a core programming language.

 * Proven experience designing and developing reliable, scalable applications.
 * Solid understanding of software architecture, design principles and engineering best practices.
 * Strong experience with automated testing, TDD and software quality assurance.
 * Familiarity with modern development frameworks, databases and deployment processes.
 * Experience working in complex technical environments.
 * Ability to investigate and resolve challenging technical issues independently.
 * Experience collaborating with Product Owners, engineering teams and wider business stakeholders.
 * Confidence influencing technical decisions and providing guidance to other developers.
 * Excellent communication and problem-solving skills.

What Makes You a Good Fit?

You'll be someone who enjoys writing clean, maintainable code and takes pride in delivering software that performs reliably.

You'll be comfortable working independently, taking responsibility for technical outcomes and contributing to wider engineering discussions.

Above all, you'll bring a practical, solutions-focused mindset and the ability to balance technical quality with business priorities.

## Description

As a Senior Software Engineer, you'll take responsibility for delivering high-quality software solutions across complex technology environments., * Designing, developing and maintaining reliable, scalable applications using Python.

 * Taking ownership of software design, implementation, testing and ongoing operation.
 * Developing and enhancing existing products, services and internal tooling.
 * Tackling complex technical problems and delivering practical, maintainable solutions.
 * Applying test-driven development (TDD), automated testing and software quality best practices.
 * Collaborating with Product Owners, Product Managers and other stakeholders to deliver technical roadmaps.
 * Contributing to architectural decisions, technical planning and continuous improvement.
 * Providing technical guidance, mentoring and support to other engineers.
 * Ensuring software changes are delivered effectively, with consideration for reliability, performance and long-term maintainability.