Senior Integration Developer (IBM ACE / IIB) – Banking – London

Location

London, UK (Hybrid)

Working Pattern: 8 days onsite per month, remainder remote

Engagement: Umbrella company only

RATE: £500 – £600

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The Opportunity

We are looking for an experienced Senior IBM App Connect Enterprise (ACE) / IBM Integration Bus (IIB) Developer to join a highly skilled engineering team responsible for delivering and supporting enterprise integration and messaging solutions within a complex financial services environment.

This is an excellent opportunity to work on business-critical systems, designing, developing and maintaining high-performance integration services that support large-scale transaction processing. You’ll be involved throughout the full software development lifecycle, working closely with analysts, developers and business stakeholders to deliver robust, scalable and high-quality solutions.

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Responsibilities

As a Senior IBM ACE / IIB Developer, you will:

• Design and develop integration solutions using IBM App Connect Enterprise (ACE) / IBM Integration Bus (IIB).

• Produce detailed technical designs and program specifications from high-level functional requirements.

• Develop, test and deploy high-quality integration services and message flows.

• Configure and develop solutions using IBM MQ.

• Produce deployment documentation and automated deployment scripts.

• Create and execute unit and subsystem test plans.

• Support application integration and production deployments.

• Participate in code reviews, design reviews and technical discussions.

• Perform proof-of-concepts to validate solution designs and meet performance and throughput requirements.

• Troubleshoot production issues and provide ongoing application support.

• Work collaboratively within Agile delivery teams to deliver solutions on time and to a high standard.

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Essential Skills & Experience

• Strong commercial experience with IBM App Connect Enterprise (ACE v12) or IBM Integration Bus (IIB v10+).

• Experience developing and supporting IBM MQ / WebSphere MQ solutions.

• Strong SQL and PL/SQL skills with Oracle databases.

• Experience working with Oracle database design.

• Good knowledge of Linux (RHEL) environments.

• Experience with XML and JSON message formats.

• Strong understanding of enterprise integration and messaging architecture.

• Experience across the full Software Development Lifecycle (SDLC).

• Ability to produce high-quality technical documentation and solution designs.

• Strong analytical and problem-solving skills.

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Desirable Skills

Experience with any of the following would be advantageous:

• SWIFT ISO 15022 and/or ISO 20022 messaging standards.

• Financial services, banking, payments or capital markets.

• C#

• .NET

• Java

• C++

• Linux Shell Scripting

• REST APIs

• Performance tuning and optimisation of integration solutions.

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What We’re Looking For

We’re looking for someone who is:

• A collaborative team player with excellent communication skills.

• Self-motivated and able to work independently.

• Passionate about delivering high-quality software.

• Comfortable working within a fast-paced Agile environment.

• Meticulous, organised and detail-oriented.

• Able to manage multiple priorities while maintaining high technical standards.

• Keen to learn new technologies and broaden their technical expertise.

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Working Arrangements

• Location: London

• Hybrid: 8 days onsite per month, remainder remote.

• Engagement: Umbrella company only.

If you’re an experienced IBM ACE / IIB professional looking to work on complex enterprise integration platforms within a collaborative and technically challenging environment, we’d be delighted to hear from you.

*Rates depend on experience and client requirements