iSeries Development Lead

IntaPeople; Cardiff; Hybrid; GBP 58,000 - 62,000; Full time

Job summary

A technology company is seeking an experienced iSeries Development Lead to guide a small team in maintaining and modernising core processing systems. The candidate should have a strong background in RPG, COBOL, Java, or .NET, with experience in the AS400 environment. This hybrid role requires clear communication and the ability to manage both technical decisions and a team effectively. Additional benefits include 25 days of annual leave and a robust pension scheme.

Benefits

25 days annual leave plus 16 additional days

28% Pension

Hybrid working policy

Supportive working culture with opportunities to develop skills

Interest in Welsh language welcomed

Qualifications

• Strong experience developing in RPG, COBOL, Java or .NET.
• Understanding of the AS400 environment (CL, DDS, DB2, etc.).
• Ability to design specs, analyse systems and support testing and user journeys.
• Experience working with data processing, integrations, and legacy modernisation.
• Clear communication skills and confidence dealing with a range of stakeholders.
• Experience leading or mentoring developers is an advantage.

Responsibilities

• Leading the maintenance and modernisation of iSeries systems.
• Acting as the lead developer for RPG and COBOL work.
• Designing and delivering new features, integrations, and system updates.
• Overseeing data processing workloads and ensuring outputs are accurate and delivered on time.
• Reviewing external software and making sure integrations meet internal standards.
• Producing clear technical specs and documentation.
• Working with internal teams to shape solutions.
• Keeping project leads updated on progress and managing priorities within the team.
• Supporting users and improving existing processes.
• Line managing the iSeries team including workload planning and development.

Skills

RPG

COBOL

Java

.NET

AS400 environment

Clear communication

Mentoring developers

Job description

iSeries Development Lead

Salary: £58,000 - £62,000
Contract: Permanent, full-time
Location: Hybrid (regular travel to Cardiff required)

We re looking for an experienced iSeries specialist to lead a small development team and keep key exam processing systems running smoothly. It s a hands-on role where you ll guide technical decisions, support a team of five developers and make sure core applications stay reliable for users across the organisation.

What you ll be doing

• Leading the maintenance and modernisation of iSeries systems
• Acting as the lead developer for RPG and COBOL work
• Designing and delivering new features, integrations and system updates
• Overseeing data processing workloads and ensuring outputs are accurate and delivered on time
• Reviewing external software and making sure integrations meet internal standards
• Producing clear technical specs and documentation
• Working with product, BI, research, developers and other internal teams to shape solutions
• Keeping project leads updated on progress and managing priorities within the team
• Supporting users, explaining technical changes in plain language and improving existing processes
• Line managing the iSeries team including workload planning, development and pastoral support

What you ll need

• Strong experience developing in RPG, COBOL, Java or .NET
• Understanding of the AS400 environment (CL, DDS, DB2 etc)
• Ability to design specs, analyse systems and support testing and user journeys
• Experience working with data processing, integrations and legacy modernisation
• Clear communication skills and confidence dealing with a range of stakeholders
• Experience leading or mentoring developers is an advantage

What s on offer

• 25 days annual leave plus 16 additional days
• 28% Pension
• Hybrid working policy
• Supportive working culture with opportunities to develop skills
• Welsh language skills not required, but an interest in learning is welcomed

How to apply

Applications are open to candidates across the UK, though regular time on-site in Cardiff is needed. Closing date is Sunday 11 January 2026 with interviews planned for the following week.