13 of 13 Mainframe Jobs in London

large-scale system projects. This will include: Reviews, analysing, and modifying programming systems including encoding, testing, debugging and installing for a large-scale Mainframe computer system. Essential Duties and Responsibilities for the Senior C++ Developer/Software Engineer: Maintains project estimates and project management timelines for multiple major projects. Verifies ...

Mainframe Engineer Hybrid Working – London – 2 days a week on site. Financial Services Lorien's leading banking client is looking for a n experienced Mainframe Engineer, this person will support the test environments to enable delivery of features to mobile/online banking customers. The person will have hands … experience with Mainframe Technologies such as CICS and DB2, along with an understanding of AWS Services This role is based in London. This role will be Via Umbrella. Working in a Hybrid Model of 1 day a week on site. Key Responsibilities: Provide expert support and timely resolution of environment ...

Architect to spearhead a high-stakes transition of their core transaction engine. You will essentially be the primary architect bridging the gap between legacy mainframe foundations and modern target p click apply for full job details ...

need a specialist who understands that migrating a payment engine is a high-wire act. You will own the bridge between our legacy Mainframe and target platforms, ensuring that every message from legacy MT to modern MX flows with 100% integrity. Core Responsibilities Architectural Ownership: Lead the 'Strangler Fig' migration ...

Title Client Development Partner - Analytics Location Central London - Mainframe (Hybrid) Department Growth Reporting To Amanda Barnard (currently on maternity leave – report directly to Emily Swann) Job Purpose To grow Advanced Analytics non‐recurring revenue bookings within the FMCG, Foods and Fashion client areas while strengthening Worldpanel’s overall position ...

Urgent contract opportunity with a leading German client for a Mainframe Modernization Specialist , working remotely from the UK (aligned to German business hours). Role Overview: Location: Remote (UK-based) Contract: Inside IR35 Start: Immediate Key Requirements: Strong experience in mainframe re-hosting/modernization Hands-on migration of COBOL ...

Urgent contract opportunity with a leading German client for a Mainframe Modernization Specialist , working remotely from the UK (aligned to German business hours). Role Overview: Location: Remote (UK-based) Contract: Inside IR35 Start: Immediate Key Requirements: Strong experience in mainframe re-hosting/modernization Hands-on migration of COBOL ...

Rate Inside IR35 Remote, with occasional travel to London, Manchester, Newcastle Role Purpose The Principal Engineer will provide senior technical leadership for a complex mainframe modernisation programme characterised by a large case load, high throughput, and significant scalability and resilience requirements. The role is accountable for shaping and assuring solution … including Kubernetesbased platforms. Deep handson experience with Java, Spring Boot, and Node.js, building scalable and resilient backend services. Experience modernising or integrating with mainframe or legacy enterprise systems in highvolume environments. Proven ability to enforce engineering standards and operate effectively within highgovernance, regulated, or public sector contexts. Strong understanding ...

Architect to spearhead a high-stakes transition of their core transaction engine. You will essentially be the primary architect bridging the gap between legacy mainframe foundations and modern target platforms. This ideal candidate for this role will be someone who understands the granular detail of how a message moves from … Essential Skills UK Payment Rails: Expert-level BACS & Faster Payments (FPS) . Global Messaging: SWIFT & SEPA mastery, including ISO 20022 (MT/MX) . Mainframe Core: IBM DB2 specialist (Query Optimisation, Partitioning, Archiving). Data Migration: Hands-on Extraction , Mapping , and Lineage for high-throughput systems. Risk & Governance: CASS ...

Architect to spearhead a high-stakes transition of their core transaction engine. You will essentially be the primary architect bridging the gap between legacy mainframe foundations and modern target platforms. This ideal candidate for this role will be someone who understands the granular detail of how a message moves from … Essential Skills UK Payment Rails: Expert-level BACS & Faster Payments (FPS) . Global Messaging: SWIFT & SEPA mastery, including ISO 20022 (MT/MX) . Mainframe Core: IBM DB2 specialist (Query Optimisation, Partitioning, Archiving). Data Migration: Hands-on Extraction , Mapping , and Lineage for high-throughput systems. Risk & Governance: CASS ...

part in transitioning legacy platforms to new architectures while minimising risks to business-critical payment processing. Key Responsibilities: Own data and technical architecture bridging mainframe and target platforms Define data mappings, extraction approaches, and migration controls Support safe, controlled execution of payments migrations within regulated environments Identify, document, and escalate … standard implementations Ability to reconcile documented designs with actual system behaviour Comfortable delivering within constraints rather than ideal-state redesigns Technical Familiarity Mainframe-integrated architectures Messaging technologies such as IBM MQ and MT/MX translation layers Communication & Stakeholder Management Ability to engage confidently with subject matter experts, engineers ...

global technology services provider seeks a skilled Solution Architect to deliver pre-sales support for mainframe application modernization solutions. The role requires expertise in mainframe systems, cloud technologies, and strong communication skills. You will engage with clients to design and present end-to-end modernization strategies and serve ...

need a specialist who understands that migrating a payment engine is a high-wire act. You will own the bridge between our legacy Mainframe and target platforms, ensuring that every message from legacy MT to modern MX flows with 100% integrity. Core Responsibilities Architectural Ownership: Lead the 'Strangler Fig' migration … enforce CISA-aligned audit frameworks and CASS regulatory controls to ensure zero-loss migration. Pragmatic Legacy Integration: Navigate the 'documented vs. actual' reality of Mainframe systems, building executable solutions within existing technical constraints. Technical Requirements Payments Flow Expertise: Ability to demonstrate design leadership across the full lifecycle: Gateway/Connectivity ...