Working hours: 35 hours per week, Monday to Friday

Duration: 12 month fixed term contract

Location: Gloucester

Job Ref: 204355

About the role

Benefact Group are looking for a Senior Developer to join our Gloucester office.

We’re upgrading our IBM Power hardware and operating system in 2026 and looking for someone who can represent the development teams in the process, ensuring a problem free quality migration for the core company platform.

Why join us?

Join a collaborative and inclusive culture that’s committed to making a difference and building a more sustainable future. Ranked amongst the UK's top 50 Best Large Companies to Work For in 2024, we offer fantastic career and development opportunities within a rapidly growing, innovative Group — where all profits go to charity and good causes.

What you'll be doing

• Pre-Upgrade Assessment - Review existing applications and dependencies to ensure compatibility with the new IBM Power hardware and OS levels
• Code Remediation - Update or refactor application code to align with new compiler versions, libraries, and review performance enhancements introduced by the upgrade
• Testing & Validation – Work with the Test team to cover functional and performance testing in upgraded environments to confirm stability and compliance with business requirements
• Automation & Deployment Scripts - Develop or update scripts for automated builds, deployments, and configuration management to streamline migration
• Post-Upgrade Support - Troubleshoot issues, optimize performance, and ensure smooth integration with other systems after the upgrade

What you'll need to have

• IBM Power i System Knowledge - Understanding IBM Power architecture, OS versions and related system utilities.
• Programming Expertise - Proficiency in languages commonly used on IBM Power systems, such as RPG and CL, and integrations like HATS, Java or Python.
• Server, Database and Middleware Familiarity - Experience with IWS, Websphere, DB2 for i, SQL tuning, and middleware components that interact with IBM Power environments.
• Upgrade & Migration Tools Knowledge - Familiarity with tools like IBM Navigator for i, BRMS, and scripting for automation during migration and testing.

What we offer

• A competitive salary - let's discuss it
  
• Hybrid working
  
• Group Personal Pension - up to 12% employer contribution
  
• Generous annual bonus scheme between 6% and 24%
  
• 25 days annual leave plus bank holidays, and a holiday buy and sell scheme
  
• An array of health and wellbeing benefits, including private healthcare, income protection and life assurance
  
• £200 annual personal grant to a charity of your choice
  
• Encouraged to take at least one volunteering day per year
  
• Employee Assistance Programme
  
• Full study support to gain professional qualifications
• Access to virtual GP
• Enhanced maternity and paternity pay

Hear from the hiring manager

"Be part of a high-performing team delivering a seamless IBM Power upgrade—your input and technical insight will make the difference."

About us

Benefact Group is a unique international financial services Group made up of over 30 businesses. We are owned by a charity and have been the 3rd largest UK corporate donor over a decade*, having given away £250 million since 2014. We have ambitious plans to become the UK’s number one corporate donor, with strategic objectives in place to double the Group’s size.

We believe it’s essential to attract, empower, grow and reward talented people, offering fantastic opportunities for career and personal development. Our giving ethos, 135-year history and the diversity of what we do, has enabled us to build a culture of kindness, great ambition, and of passionate people driven to do better and be better. 

At Benefact Group, we are committed to creating an inclusive culture and building an environment where each and every one of us feels valued and respected. We are a community made up of people with a range of different backgrounds, abilities, perspectives, beliefs and interests and we value the strength this brings to us as a Group. We welcome applications from everyone.

If you need any additional support during the recruitment process, then please let us know.

*Directory of Social Change’s UK Guides to Company Giving 2017-26