Full Stack Developer with Java

ING Hubs Poland is hiring!

The expected salary for this position: 15 000 - 22 000 PLN gross.

The financial ranges specified in the announcement are adjusted and may differ from the range specified in the remuneration regulations.

Your Day-to-Day:  

• Build and evolve user-facing applications that provide sustainability insights, portfolio steering capabilities and emissions-related decision support. 

• Develop backend services, APIs and integrations that enable the collection, processing and delivery of sustainability-related data. 

• Collaborate closely with Product Owners, UX Engineers, Data Analysts, Data Engineers and business stakeholders to transform complex sustainability requirements into scalable digital products.  

• Contribute to technical design and architectural decisions, ensuring solutions remain scalable, maintainable and aligned with long-term product goals. 

• Support the evolution of the web application landscape as the platform expands across business domains and sustainability sectors. 

• Implement automated testing, monitoring and continuous delivery practices to ensure high-quality software delivery.  

• Improve engineering standards, reduce technical debt and continuously enhance platform reliability and maintainability. 

• Work with data-intensive solutions, visualizations and business workflows that help users understand sustainability performance and climate-transition metrics. 

• Mentor colleagues, share knowledge and contribute to raising the engineering maturity of the team.  

• Actively challenge existing solutions and identify opportunities for continuous improvement across products, processes and technology. 

Who are we looking for? 

• Bachelor's degree in Computer Science, Software Engineering, Information Technology, Computer Engineering or a related technical discipline (required). 

• Master's degree in a related field is considered a strong advantage. 

• Relevant professional certifications in software engineering, cloud technologies, DevOps or solution architecture are considered a plus. 

• Extensive experience designing, developing and maintaining modern software applications. 

• Strong experience across both front-end and back-end development. 

• Experience building scalable web applications and distributed systems. 

• Strong proficiency in Java, Kotlin or other JVM-based technologies. 

• Experience with modern front-end frameworks and technologies, preferably React and TypeScript. 

• Experience designing and integrating REST APIs and service-based architectures. 

• Strong understanding of software engineering principles, object-oriented design, design patterns and clean code practices. 

• Experience with relational databases and data-driven applications. 

• Experience implementing automated testing strategies and quality assurance practices. 

• Familiarity with CI/CD pipelines and modern software delivery methodologies. 

• Experience working in Agile and multidisciplinary teams. 

• Excellent problem-solving, communication and stakeholder-management skills. 

• Ability to take ownership of complex topics from discovery through implementation and operational support. 

• Demonstrated ability to mentor engineers and positively influence technical decisions. 

Nice to Have: 

• Experience with cloud-native architectures, containerisation and Kubernetes-based platforms. 

• Experience working with data-intensive products, analytics platforms or reporting solutions. 

• Experience building products involving sustainability, ESG, climate or regulatory domains. 

• Familiarity with Azure DevOps or similar engineering toolchains. 

• Experience contributing to technical roadmaps, architecture evolution and platform strategy. 

• Understanding of data engineering concepts, data pipelines and large-scale data processing. 

• Experience working within large, international organisations and cross-border teams. 

The role naming convention in the global ING job architecture will be “Engineer IV”.