Contract Role: Mainframe Performance and Capacity Analyst - Banking - Inside IR35

Location: UK (Remote) or Denmark (Hybrid - 10 days/month onsite)

Rate: £475-£575/day (Inside IR35, via umbrella)

Duration: 6 months+

Start: ASAP

Client: Global Consultancy, End Client in the Banking Sector

Salt is working with a global consultancy delivering high-level Mainframe optimisation services to a major banking client. We are recruiting an experienced Mainframe Performance and Capacity Analyst to support proactive tuning and capacity planning across critical z/OS environments.

This role sits within a Performance Competence Centre, with responsibility for system and application performance diagnostics, workload forecasting, and tooling optimisation.

• Monitor, analyse, and tune Mainframe system and application performance
• Conduct capacity forecasting and support infrastructure provisioning
• Lead performance data analysis and reporting using SMF, RMF, WLM
• Develop and maintain custom tooling and dashboards
• Liaise with technical teams to prevent capacity-related issues
• Create documentation, reports, and performance improvement plans

• 7+ years' experience in Mainframe performance tuning and capacity planning
• Strong knowledge of SMF, RMF, WLM, and performance management tooling (APA, MXG, SAS)
• Ability to analyse batch and online application performance
• Comfortable working in high-availability banking environments

• Experience with ELK stack or in-house dashboarding tools
• Coding experience in REXX, Python, Assembler, or PL/1
• Familiarity with z/OS system internals and workload behaviours

• UK-based contractors: Fully remote. Must work via umbrella (inside IR35)
• Denmark-based contractors: Hybrid model, 10 days/month onsite
• Background checks to be completed post-onboarding

*Rates depend on experience and client requirements