Mainframe Consultant at E-Frontiers, London, £600-£800 per day

Mainframe Assembly & AI Modernisation Consultant

Contract: 6 months
Location: London - Hybrid
Engagement: Outside IR35
Rate: £600-£800 DOE

We are seeking an experienced Mainframe Assembly & AI Modernisation Consultant for a six-month engagement with a leading global financial services organisation.

This is a specialist consulting opportunity combining deep Mainframe Assembly expertise with emerging AI-assisted development technology, including Amazon Kiro. You will play a key role in analysing and modernising Legacy banking systems, while working directly with senior client stakeholders to drive transformation.

• Analyse, review and modernise Legacy Mainframe applications, with a strong focus on Assembly language.

• Use Amazon Kiro and AI-assisted development techniques to support code analysis, transformation and rewriting.

• Advise clients on Legacy technology modernisation approaches and identify opportunities to improve existing systems.

• Engage with senior business and technology stakeholders, facilitating discussions, gathering requirements and presenting technical recommendations.

• Take ownership of project deliverables, manage expectations and drive progress through to successful completion.

• Extensive hands-on experience with Mainframe environments and Mainframe Assembly language.

• Practical experience using Amazon Kiro, ideally within AI-assisted code transformation or Legacy modernisation projects.

• Background in management consultancy, technology consulting or professional services, with experience delivering projects for external clients.

• Strong stakeholder management and communication skills, with the confidence to engage senior-level audiences in complex banking environments.

• A proactive, autonomous consultant who can combine technical expertise with commercial awareness and take ownership of client delivery.

If you have a strong Mainframe Assembly background and experience applying AI to Legacy code modernisation, we would love to hear from you. Apply today with your latest CV to discuss this opportunity.