Python Software Engineer

Due to progression, this role exists to replace a senior engineer within a well-established software company operating in the highly regulated energy sector.

Senior Python Software Engineer
Circa £56,000 + up to 15% bonus | Hybrid (2 days per month onsite, Southampton)

The software you'll work on is business critical. It must be reliable, auditable, and able to stand up to regulatory scrutiny. That shapes how engineering is done here: considered design, well-tested code, and a focus on doing things properly rather than quickly.

If you're a Python engineer ready to take on more responsibility, mentor others, and work in an environment where engineering discipline matters, this role is designed for you.

What you'll be working on
You'll join a software-led organisation, contributing to the design, development, and ongoing improvement of commercial systems used within a regulated energy environment.
Your work will include:

Building and maintaining Python-based services and applications
Writing clear, well-tested, and maintainable code
Contributing to design decisions and agreed technical standards
Reviewing code and helping raise engineering quality across the team
Supporting reliable releases in a cloud-hosted environment
You'll report directly to a Principal Software Engineer and work alongside experienced engineers who value clarity, quality, and pragmatic problem-solving.

What "senior" means here
This is not a people-management role.
Seniority is demonstrated through:

Sound technical judgement
Ownership of complex pieces of work
Mentoring and supporting less-experienced engineers
Leading by example in code quality, testing, and delivery
It's well suited to someone who may not yet hold a senior title, but is already operating at that level and ready to step up.

Essential experience

Commercial experience developing software with Python
Experience building and maintaining production systems
A strong approach to testing and code quality
Experience working in a cloud environment
AWS preferred, but Azure or GCP is equally acceptable
Working pattern and location (important)

Hybrid role with 2 days per month onsite
Office location:
Southampton, Hampshire
Candidates must be within a 2-hour commute

This is non-negotiable and intended to ensure effective collaboration when required.

Salary and benefits

Circa £56,000 base salary
Bonus up to 15% (personal and company performance)
25 days' annual leave plus bank holidays
Pension scheme (4% employer contribution when you contribute 5%)
Health care scheme (including dental and eye care)
EV car scheme (terms apply)
Free onsite gym
Employee Assistance Programme and wellbeing support
Paid volunteering day each year
Interested?
If you're a Python engineer looking to step into a senior-level role, working on meaningful software in a regulated environment, this is worth a conversation.

Apply directly or contact Chris Lynes at Spectrum IT Recruitment for a confidential discussion.

Spectrum IT Recruitment (South) Limited is acting as an Employment Agency in relation to this vacancy