Senior Modelling Software Engineer - Chronos

Responsibilities

• Manage on-time delivery of robust and scalable model features.
• Coach, mentor and line manage junior colleagues, supporting their development and engagement.
• Design, implement, and maintain Python modules/packages in the modelling codebase.
• Innovate in wider software architecture and data orchestration to improve scalability and developer experience.
• Improve code quality and developer experience by refactoring for clarity, strengthening interfaces and simplifying implementations.
• Champion automated testing and TDD; driving the adoption of modern, agentic-first software engineering practices in the model development team.
• Lead constructive and empathetic code reviews and technical design discussions.

Preferred

• Experience in DevOps/Infrastructure development including containers and CI/CD.
• An interest in working in the energy/decarbonization sector.
• Experience engaging with internal stakeholders and colleagues in other teams.
• Experience developing software for modelling, simulation or mathematical optimisation.

Key Responsibilities

Skills, Knowledge and Expertise

Required attributes

Professional Python experience (

• 6+ years) in a team‑based software environment, delivering components used by other teams, user groups or customers.
• Experience managing and mentoring junior colleagues.
• Demonstrable experience in applied software architecture and design patterns.
• Disciplined experience of Test Driven Development and Continuous Delivery.
• Experience stewarding internal libraries, packaging and dependency management at scale.
• Experience in effective and efficient agentic-first development.

Some of the benefits we include are

• Private Medical Insurance
• Dental Insurance
• Parental Support
• Salary-Exchange Pension
• Employee Assistance Programme (EAP)
• Local Oxford Discounts
• Cycle-to-work Scheme

Flu Jabs

At AER, we are committed to offering flexibility in the way we work. Most of our roles are hybrid with a mix of in-office/home working and potentially adjustable working hours. Let’s discuss what works for you and AER during the interview process.

The Company is committed to the principle that no employee or job applicant shall receive unfavourable treatment on grounds of age, disability, gender reassignment, race, religion or belief, sex, sexual orientation, marriage or civil partnership, pregnancy, and maternity.

To apply, please submit your Résumé / CV, a personal summary, your salary expectations and please inform us of your notice period.

Unfortunately, we are unable to accept applications via email, telephone, or social media platforms. To be considered for this position, please submit your application using the link provided. Applications submitted through any other channel will not be reviewed.