Senior Java Engineer – Liferay Specialist

We are #OPAP!We are the leading gaming company in Greece and one of the most respected in the industry worldwide, with 67 years of history. Our vision is to provide best in class entertainment across retail & online in a safe & responsible way, while generating sustainable value to all stakeholders & giving back to society. Customer centricity, digital orientation, agility, people engagement, and social contribution are embedded in our DNA, fostering a culture that is open, inclusive, adaptive and growth-oriented. Our recently redesigned values focus on Doing what is right, Winning together, and Thinking differently!At OPAP, we have been recognized as a Top Employer in Greece for 3 consecutive years, in 2023, 2024 & 2025! A certification that underlines our commitment to providing a workplace that stands out.So, what’s the challenge...The Senior Software Engineer is a key member of a cross-functional agile team, responsible for designing, developing, and delivering scalable and secure digital solutions using the Liferay DXP platform. This role bridges the gap between business needs and technical implementation, ensuring high-quality, maintainable code and seamless user experiences across complex enterprise environments.Your day to day will include:Designing and implementing scalable, secure, and high-performance solutions using the Liferay Digital Experience Platform (DXP)Collaborating with cross-functional teams to define and deliver product features aligned with business goalsLeading or mentoring external development teams, ensuring adherence to best practices and architectural standardsParticipating in code reviews to identify bugs and improve overall software qualityDeveloping and refactoring existing applications based on architectural evolution, platform roadmap, and security standardsDocumenting software interventions and developments to support effective lifecycle managementWhat you need to succeed: BSc degree in Computer Science, Information Technology or another relevant field.MSc degree is desirableMinimum 3 years of experience with Liferay DXP (7.x), including portal development (JSR-286), customization, integration, and basic administration (user/role management, configuration, performance tuning)Strong knowledge of Liferay architecture: OSGi modules, Service Builder, theming, permissions framework, and frontend technologies (JSP, AlloyUI, React or other modern JS frameworks)Experience on Liferay version upgrades (eg. 7.2 - 7.4)Proven experience with Java (8–21+), combining modern features with legacy system support, and solid understanding of Clean Code and Clean Architecture principlesHands-on experience with Spring, Hibernate, RESTful APIs, Elasticsearch, and CI/CD tools in high-performance, scalable environmentsExperience deploying and managing Liferay in cloud (AWS, Azure) and on-premises infrastructuresBe able to provide detailed technical documentationExcellent collaboration and communication skills (written and verbal in Greek and English), with experience working in agile development teamsWhat’s in it for you?An award-winning working environment 🚀State of the art facilities including gym & restaurant 🏢Hybrid working model 💻Competitive salary package and bonus scheme 💸Health insurance coverage & Pension Plan 🙏Monthly food allowance 🍴Continuous learning with classroom/digital trainings by OpapAcademy 🎓Internal Career Opportunities 💼Well-Being Activities 💪OPAP Group is an equal opportunity employerDoes this sound like you? If yes, we would love to meet you!