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September 3, 2026
Lead Solutions Architect - CREST New Technology
Senior • On-site
Krakow, Poland
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Description
CREST is being evaluated for an incremental, multi-year migration from COBOL programs on the HPE NonStop Guardian platform to technology that can run on commoditised Linux platforms. The target solution will be Java-based and use Event Hub technology, such as Kafka, to integrate migrated services with the non-migrated legacy CREST system. Migrated services must be platform-independent to run in OpenShift Linux environments.
Responsibilities
- Define options and recommend migration from legacy systems to an event-driven, service-focused architecture in collaboration with enterprise architecture, application architects and other stakeholders.
- Deliver coherent end-to-end IT solutions that meet functional and non-functional requirements.
- Ensure solutions align with enterprise engineering and architecture standards.
- Ensure end-to-end delivery consistency across platforms and teams, including solution walkthroughs with delivery teams.
- Collaborate with security to ensure the solution meets security standards.
- Establish infrastructure requirements and work with infrastructure teams on technical and infrastructure design.
- Establish solution architecture and design guidelines, patterns and standards for the new technology stack.
- Establish prototypes and proofs of concept for key components of the proposed architecture.
- Establish estimation principles for migration-program phases and proof-of-concept exercises.
- Lead implementation of prototypes and follow-on work.
- Present solution architecture and plans to management, customers and team members.
- Act as the technical authority for the solution under the new technology stack.
Requirements
- Demonstrable solution architecture skills and experience.
- Strong systems-development experience across inception, budgeting, architecture, design, development, testing, live implementation and post-implementation support.
- Strong experience implementing Event Hub technology, such as Kafka, and modern architectures, including service-oriented and microservices architectures.
- Experience leading implementation of platform-independent and database-independent applications.
- Experience working with financial-market infrastructure and/or regulated environments.
- Strong analytical and systems architecture/design skills.
- Database design skills using technologies such as Oracle and SQL Server.
- EDA technology experience, including Kafka.
- OpenShift and containerisation skills.
- Hands-on object-oriented design and Java programming skills.
- Ability to motivate, mentor, coach and lead colleagues.
- Ability to work independently, meet agreed timescales, identify and solve problems, and adapt to a dynamic environment.
- Strong written, oral, communication and presentation skills.
- Ownership and accountability for project work.
Nice to have
- Messaging standards: ISO 15022, ISO 20022 and JSON.
- Agile development experience.
- IBM MQ.
- Angular framework.
- HPE NonStop.
- Knowledge of CREST settlement systems.
Benefits and ways of working
- Work with supportive, engaged colleagues in an international environment.
- Learning and development environment focused on knowledge sharing and training.
- Competitive salary and comprehensive benefits.
- Hybrid working model with office attendance 8 days per month and remote-working options.
- Inclusive workplace that values diversity and provides accommodations where needed.
Team
The Group Business Solutions division delivers reliable and sustainable IT solutions for financial securities markets. Technical teams develop new solutions, improve existing applications, deploy controlled production changes and provide application production support.
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