Full Stack Developer (Expert) – Java & Cloud Migration

Are you a seasoned technology professional who loves solving complex problems, leading teams, and turning legacy systems into modern, high-performing solutions? We're looking for a Full Stack Developer (Expert) to help drive an exciting mainframe modernisation initiative, migrating legacy applications into modern Java and cloud-based environments.

This is your opportunity to combine technical expertise, strategic thinking, Agile leadership, and cloud innovation while working on complex, enterprise-level systems.

What You'll Be Doing:

• Lead the modernisation and migration

of legacy mainframe applications to modern Java-based solutions.

• Help design and refine migration

strategies for converting COBOL and PL/1 applications into Java.

• Analyse existing systems, identify

dependencies, assess risks, and develop practical migration plans.

• Work with cloud and infrastructure

teams to map legacy components to suitable cloud services.

• Drive the delivery of complex

projects, keeping timelines, budgets, quality, and business requirements on track.

• Lead and support Agile feature teams,

encouraging collaboration, transparency, and continuous improvement.

• Work closely with stakeholders,

Product Owners, developers, testers, and external suppliers to turn business requirements into workable solutions.

• Oversee system integration, testing,

parallel runs, implementation, and quality assurance.

• Ensure solutions meet performance,

security, data integrity, and compliance requirements.

• Troubleshoot complex technical issues

and provide second-level support when required.

• Champion DevOps automation, modular

architecture, and efficient development practices.

• Keep documentation up to date and

share knowledge through coaching, training, and knowledge-transfer sessions.

• Monitor migrated

applications and continuously improve cloud performance, cost, and efficiency.

Requirements

You'll need a strong technical foundation, combined with the confidence to guide teams and make important architectural and delivery decisions.

Essential technical experience:

• Strong Java development skills,

including object-oriented programming, multithreading, collections, generics, and exception handling.

• Extensive experience with Java

frameworks, particularly Spring, Spring MVC, and Spring Boot.

• At least 10 years' experience in IT,

Software Development, or DevOps, with 10+ years in a relevant programming language.

• Strong project delivery and project

management capabilities.

• Experience with Agile methodologies

and managing work across multiple Agile teams.

• Knowledge of system integration,

requirements analysis, technical planning, and solution design.

• Experience coordinating development

and support environments.

• Proficiency in Agile tools such as

Jira, Confluence, X-Ray, and Bitbucket.

• Experience with DevOps, transition

management, and problem, incident, and change management.

• Resource planning, budget management,

and technical team leadership experience.

• Previous exposure to a finance

function, either directly or through supporting a finance-focused team.

Additional technical experience that will give you an edge:

• AWS or Azure cloud architecture and

services.

• Serverless development, including AWS

Lambda.

• Kafka, streaming services, and

publish/subscribe (Pub/Sub) technologies.

• Docker, Kubernetes, and OpenShift.

• Mainframe technologies and databases,

including COBOL, PL/1, DB2, IMS, and J2EE.

• Mainframe-to-Java code conversion

tools such as Astadia, Heirloom, or BlueAge.

• Cloud-based architecture for legacy

application migration.

• Testing frameworks such as JUnit or

TestNG, along with automated and integration testing.

• Hibernate or other ORM frameworks.

• Modern front-end technologies such as

Angular, React, or Vue.js.

• Performance optimisation,

debugging, high availability, and security best practices.

Qualifications & Certifications

• A relevant IT, Business, or

Engineering qualification.

• At least one recognised advanced

Scrum or Agile certification, such as Professional Scrum Master II, Advanced Certified ScrumMaster, Certified SAFe Advanced Scrum Master, Leading SAFe Agilist, or Scaled Professional Scrum.

• A Scrum Master certification and

project management qualification would be advantageous.

Benefits

• Work on a complex, global-scale

technology modernisation initiative.

• Collaborate with international teams

and experienced technology professionals.

• Enjoy a flexible working model

combining remote and on-site work.

• Benefit from a flexible working

arrangement of 1,960 hours over a 12-month period.

• Be part of a fast-paced, energetic

environment that values innovation and teamwork.

• Gain exposure to modern cloud

technologies, enterprise architecture, and large-scale migration projects.