Senior Software Engineer - Java/Spring/AWS

Zinkworks partners with leading Telecommunications and Financial Services organizations to modernize legacy systems, migrate mission-critical platforms to the cloud, and engineer AI-driven automation. From OSS transformation to rApp development and network intelligence, our teams simplify complexity and turn it into competitive advantage. Based in Ireland and operating across the EU, UK, and US, Zinkworks combines deep domain expertise with delivery excellence to help clients modernize faster and operate smarter.

We are seeking an experienced Senior Software Engineer to join our team at Zinkworks. You will be working with one of our leading financial services clients to deliver scalable, high-performance solutions.

This role is part of a strategic programme focused on modernizing the client’s mainframe capability. You will play a key role in transforming existing functionalities into modern JSON-based services, enabling improved performance, flexibility, and integration across their technology stack.

As a senior member of the team, you’ll provide technical leadership, mentor junior engineers, and influence architectural decisions to ensure high-quality delivery.

• Design, develop, and maintain robust and secure Java-based applications.

• Work with Spring and Spring Batch frameworks to deliver high-performance services.

• Build and deploy solutions in AWS using Lambdas, EC2, and other cloud-native services.

• Transform legacy functionalities to support mainframe modernization.

• Ensure scalability, performance, and reliability across distributed systems.

• Collaborate closely with cross-functional teams including architects, testers, and DevOps engineers.

• Participate in code reviews, provide technical guidance, and mentor junior developers.

• Support continuous integration and deployment pipelines to ensure efficient delivery.

• Troubleshoot production issues and contribute to root cause analysis.

• Work in an Agile/Scrum environment, contributing to sprint planning, estimation, and retrospectives.

• 5+ years of professional software development experience.

• Strong expertise in Java and the Spring Framework. Versions Java 17+ & Spring 3.X+

• Hands-on experience with Spring Batch for large-scale data processing, Spring Integration and Spring Kafka.

• Solid background in AWS services, particularly Lambdas, EC2, EKS, Keystore and others.

• Knowledge of S3 (or willingness to upskill quickly).

• Experience with RESTful APIs and microservices architecture.

• Familiarity with CI/CD pipelines and DevOps best practices.

• Understanding of relational and non-relational database concepts. PostgreSQL and H2.

• Excellent problem-solving, debugging, and analytical skills.

• Strong communication skills and the ability to work effectively in a collaborative environment.

• This role will require visits to the client site 1 week per month in Galway City

• Experience with Ansible for automation and configuration management.

• Familiarity with containerisation technologies like Docker or Kubernetes.

• Exposure to financial services or highly regulated environments.

• Knowledge of security best practices for cloud-native applications.

At Zinkworks, we are deeply committed to fostering a culture of diversity, inclusion, and belonging. We believe that our strength lies in the unique backgrounds, perspectives, and experiences of our team members. By embracing an inclusive environment, we empower innovation and collaboration across all levels of our organisation. Based in Ireland, we are proud to support and engage with our local communities through meaningful initiatives that promote equity and opportunity. Our commitment extends beyond the workplace, as we actively contribute to creating a more inclusive and connected society for all.