Full Stack Developer - Java/React

About Zinkworks

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.

The Role

Zinkworks is seeking a Senior Full Stack Developer to join our growing engineering team. In this role, you will be responsible for designing, developing, testing, supporting, and troubleshooting high-quality software solutions across the technology stack. You will work in a fast-paced Agile environment, contributing to the delivery of scalable applications, APIs, and microservices while helping drive engineering excellence across development, testing, and operational automation.

This is an exciting opportunity for a hands-on engineer with strong Java and modern frontend experience, a passion for solving complex technical problems, and an interest in cloud-native development practices.

Key Responsibilities

• Design, develop, test, and maintain scalable software solutions across backend and frontend systems

• Build and enhance APIs and microservices using modern Java-based frameworks

• Develop responsive frontend applications using React

• Support end-to-end software delivery, including troubleshooting and resolving complex issues across the technology stack

• Contribute to automated testing strategies across UI and API layers

• Work with CI/CD pipelines to support efficient, reliable software delivery

• Collaborate with cross-functional teams in Agile delivery environments including Scrum and Kanban

• Contribute to software design, development standards, and operational automation best practices

• Support observability and monitoring efforts to ensure application reliability and performance

• Participate in container-based development and deployment practices

• Continuously improve engineering processes, code quality, and team delivery capability

The Expertise You Have

• Bachelor’s degree in Computer Science or a related discipline

• 6–9 years of hands-on experience as a Software Engineer

• Strong proficiency in Java 17+, React, Spring, and Spring Boot

• Solid experience developing RESTful services, APIs, and microservices

• Exposure to test automation tools and frameworks, including:

  • Hammer and CallMaster for frontend testing

  • RestAssured

  • Cucumber Java BDD

  • Insomnia for API testing

• Exposure to observability and monitoring tools such as Splunk

• Experience working with CI/CD pipelines and tools such as Jenkins or similar

• Expertise in Agile delivery methodologies such as Scrum and Kanban

• Strong understanding of software design, development, testing, and operational automation

• Familiarity with Docker, Kubernetes, and container-based development/deployment practices is an advantage

• Familiarity with NoSQL databases such as MongoDB and DynamoDB is a plus

• Ability to troubleshoot complex data and application issues across the end-to-end technology stack

• Hands-on experience with Azure or AWS, or a strong demonstrated interest in building cloud expertise through certifications or training

• Demonstrated experience owning engineering outcomes across design, development, testing, support, and troubleshooting

• Proven ability to work independently and professionally

• A self-starter mindset with curiosity, collaboration, innovation, and a strong desire to learn continuously

Inclusion & Diversity at Zinkworks

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.