Senior Application Developer

IBM; Abbots Worthy; On-site; GBP 60,000 - 80,000; Full time

Job summary

A global technology company in the UK is seeking a Senior Application Developer to design enterprise integration solutions. You will lead development initiatives and work with technologies like webMethods and MuleSoft. Ideal candidates have strong cloud integration skills and a background in API management. This role offers excellent career growth in a diverse environment.

Benefits

Training opportunities

Promotion opportunities

Work-life balance support

25 days holiday

Private medical and dental cover

Qualifications

• Experience in cloud integration and middleware technologies.
• Strong background in enterprise integration, API management and cloud solutions.
• In-depth knowledge of web services (SOAP, REST, HTTP) and related security standards.

Responsibilities

• Design and develop complex EAI and API integration flows across cloud and on-prem environments.
• Lead technical design sessions and provide guidance on architecture and implementation.
• Perform data mapping, transformation, and performance optimisation of integrations.

Skills

cloud integration

middleware technologies

webMethods

MuleSoft Development

IBM Integration Bus

APIs

SOAP and RESTful services

data transformation

security protocols

agile methodologies

Education

Valid right to work in the UK

Tools

IBM DataPower

webMethods

API Connect

Job description

We are seeking a Senior Application Developer - EAI to architect and deliver enterprise‑grade integration solutions across complex digital ecosystems. You will play a key role in designing message flows, APIs, and middleware solutions using technologies such as IBM IIB, MuleSoft, webMethods, and IBM DataPower. Your expertise in SOAP and RESTful services, data transformation, and security protocols will drive scalable and resilient integrations across on‑premise and cloud environments. You’ll lead development initiatives, mentor junior developers, and ensure adherence to architectural best practices. This is an exciting opportunity to shape integration strategies that enable agile and connected business operations.

Responsibilities

• Design and develop complex EAI and API integration flows across cloud and on‑prem environments.
• Lead technical design sessions and provide guidance on architecture and implementation.
• Perform data mapping, transformation, and performance optimisation of integrations.
• Oversee integration testing, deployment, and production support.
• Collaborate with business stakeholders to translate requirements into scalable technical solutions.

Qualifications

• Experience in cloud integration and middleware technologies.
• Specialised in webMethods on‑Premise and Cloud B2B integrations, MuleSoft Development, IBM Integration Bus, IBM DataPower, WebSphere Cast Iron and API Connect with a strong background in enterprise integration, API management and cloud‑based solutions.
• Expertise in solution architecture consulting, pre‑sales activities, due diligence and proof‑of‑concept (PoC) execution. Adept at working in agile environments, leading cross‑functional teams and ensuring seamless integration of systems.
• Experienced in technical leadership, troubleshooting and optimising technology stacks to enhance operational efficiency.
• Strong background in enterprise integration, middleware and cloud‑based solutions.
• Proficiency with one or more tools: IBM Integration Bus, MuleSoft, webMethods, IBM DataPower, or API Connect.
• In‑depth knowledge of web services (SOAP, REST, HTTP), SSL/TLS and related security standards.
• Skilled in troubleshooting complex system integrations and optimising technology stacks.
• Proven ability to work effectively in agile and cross‑functional teams.
• You must have the valid right to work in the UK, be a resident in the UK and have been living continuously in the UK for the last 5 years. You must be able to hold or gain a UK government security clearance.

Preferred Experience

• Experience with hybrid integration architectures.
• Exposure to solution design and pre‑sales technical consulting.
• Familiarity with containerisation or DevOps pipelines.
• Certification in relevant middleware or cloud platforms.

Benefits

• Many training opportunities from classroom to e‑learning, mentoring and coaching programs and the chance to gain industry recognised certifications.
• Regular and frequent promotion opportunities to ensure you can drive and develop your career with us.
• Feedback and checkpoints throughout the year.
• Diversity & Inclusion as an essential and authentic component of our culture through our policies and process as well as our Employee Champion teams and support networks.
• A culture where your ideas for growth and innovation are always welcome.
• Internal recognition programmes for peer‑to‑peer appreciation as well as from manager to employees.
• Tools and policies to support your work‑life balance from flexible working approaches, sabbatical programmes, paid paternity leave, maternity leave and an innovative maternity returners scheme.
• More traditional benefits, such as 25 days holiday (in addition to public holidays), private medical, dental & optical cover, online shopping discounts, an Employee Assistance Programme, life assurance and a group personal pension plan of an additional 5% of your base salary paid by us monthly to save for your future.

Equal Opportunity Employer

IBM is committed to creating a diverse environment and is proud to be an equal‑opportunity employer. All qualified applicants will receive consideration for employment without regard to race, colour, religion, sex, gender, gender identity or expression, sexual orientation, national origin, caste, genetics, pregnancy, disability, neurodivergence, age, veteran status or other characteristics. IBM is also committed to compliance with all fair employment practices regarding citizenship and immigration status.

About IBM CIC

At IBM CIC, we provide technical and industry expertise to a wide range of public and private sector clients in the UK. A career in IBM CIC means you’ll have the opportunity to work with leading professionals across multiple industries to improve the hybrid cloud and AI journey for the most innovative and valuable companies in the world. You will get the chance to deliver effective solutions, driving meaningful business change for our clients, using some of the latest technology platforms. Curiosity and a constant quest for knowledge serve as the foundation to success here. You’ll be encouraged and supported to constantly reinvent yourself, focusing on skills in demand in an ever‑changing market.