{"id":2694432,"url":"https://alion.io/job/qualco-java-backend-engineer","title":"Java Backend Engineer","company":{"id":55578,"name":"QUALCO","domain":"qualco.tech","url":"https://alion.io/company/qualco","size_band":"51-200","is_staffing_agency":false,"employer_type":"direct","is_intermediary":false,"listed_via":null,"ats_vendor":"Workable","truth_index":{"grade":"B","score":84,"open_postings":6,"ghost_share":0,"stale_share":0.833,"repost_share":0,"time_to_fill_p50_days":21,"computed_at":"2026-10-16T05:45:00Z"}},"role":"Backend","role_family":"Backend","seniority":null,"employment_type":null,"work_mode":"on_site","remote_scope":null,"remote_scope_basis":null,"remote_working_hours":null,"hiring_geo_confidence":"structured","locations":["Athens, Greece"],"countries":["GR"],"hiring_countries":[],"hiring_countries_total":0,"salary":null,"salary_estimate":null,"experience_years_min":null,"visa_sponsorship":false,"relocation_package":false,"has_equity":false,"technologies":[{"name":"Apache Kafka","optional":false},{"name":"Git","optional":false},{"name":"Java","optional":false},{"name":"JAX","optional":false},{"name":"MS SQL","optional":false},{"name":"MySQL","optional":false},{"name":"Oracle","optional":false},{"name":"Spring Boot","optional":false},{"name":"AI Agents","optional":true},{"name":"CI/CD","optional":true},{"name":"Claude Code","optional":true},{"name":"Copilot","optional":true},{"name":"Cursor","optional":true},{"name":"Docker","optional":true},{"name":"GDPR","optional":true},{"name":"Gradle","optional":true},{"name":"Kubernetes","optional":true},{"name":"Reactive Programming","optional":true}],"status":"live","first_seen_at":"2026-10-16T09:46:14Z","employer_posted_date":"2026-10-16","last_verified_at":"2026-10-16T18:17:12Z","board_verified":true,"closed_at":null,"days_open":0,"trust":{"level":"ok","repost_count":null,"flags":[],"days_open":0},"description":"At Quento Technologies S.A., the ICT arm of the Qualco Group, we deliver comprehensive and innovative solutions across AI, Digital Engineering, Cloud, and Cybersecurity, helping businesses accelerate digital transformation. With a presence in Greece, Luxembourg, and Belgium, and backed by the expertise of the Qualco Group, we combine deep technical knowledge with strategic partnerships to support business growth.\nAt Quento Technologies S.A. we empower our people to innovate and lead in delivering transformative ICT solutions to our clients worldwide.\nQuento Technologies S.A. seeks a highly motivated Java Backend Engineer to to be engaged in the following projects: Player Account Management (PAM), Janus (Retail - PAM), Financial Applications (CPP, CPF, HWS, e-procurement) and TORA applications.\nYour responsibilities will entail:\nDesign, develop, test, and maintain high-quality Java applications and services;\nParticipate in the full software development lifecycle, from requirements analysis and design through implementation and delivery;\nDevelop and integrate RESTful APIs and backend services;\nContribute to the design and evolution of scalable, reliable, and maintainable software solutions;\nWrite clean, efficient, well-tested, and reusable code following development best practices;\nTroubleshoot, analyze, and resolve technical issues, ensuring application performance and stability;\nCollaborate closely with developers, architects, product teams, and other stakeholders;\nParticipate in code reviews and contribute to improving development standards and engineering practices;\nSupport continuous improvement by exploring new technologies, tools, and development approaches;\nContribute to technical documentation and knowledge sharing within the team;\nEnsuring that all activities and duties are carried out in full compliance with regulatory requirements and supporting the continued implementation of the Group Anti-Bribery and Corruption Policy.\nRequirements\nUniversity degree in Computer Science, Engineering, or a related field;\nVery good knowledge of Java;\nExperience in at least 3 of the following frameworks/specifications: Spring, Spring Boot, JEE/Jakarta EE, JAX-RS, JPA, JDBC;\nExperience with at least one testing framework;\nGood understanding of distributed systems;\nGood understanding of the HTTP protocol;\nExperience in designing and implementing relational database systems (Oracle / MySQL / MS SQL Server);\nExperience with message brokers such as Kafka, AMQP;\nKnowledge of RESTful API design principles;\nStrong analytical, problem-solving and organizational skills;\nExperience in version control (Git).\nNice to Have\nGood understanding of system resiliency and cloud-native architecture;\nUnderstanding of reactive programming;\nKnowledge of containerization (Docker);\nSome knowledge of container orchestration (Kubernetes);\nExperience with the ELK stack;\nExperience with Java build tools such as Gradle;\nHands-on experience with agentic coding tools (e.g., Claude Code, GitHub Copilot agent mode, Cursor) across the SDLC: code generation, refactoring, test creation and code review;\nAbility to work effectively with AI coding agents: writing clear task specifications and prompts, reviewing and validating AI-generated code for correctness, security and performance, and keeping human accountability for what is merged;\nFamiliarity with integrating AI-assisted workflows into team practices (CI/CD pipelines, pull-request reviews, documentation generation) while following secure-coding and data-protection guidelines.\nBenefits\nYour Life @ Qualco Group\nOn top of challenging work environment, we are offering:\nCompetitive compensation, ticket restaurant card, and annual bonus programs\nCutting-edge IT equipment, mobile and data plan\nModern facilities, free coffee and beverages, indoor parking, and company bus\nPrivate health insurance, onsite occupational doctor, and workplace counselor\nFlexible working model, hybrid benefits & home equipment benefits\nOnsite gym, wellness facilities, and ping pong room\nCareer and talent development tools\nMentoring, coaching, personalized annual learning and development plan\nEmployee referral bonus, regular wellbeing, ESG and volunteering activities\nYour race, gender identity and expression, age ethnicity or disability make no difference in Quento Technologies S.A. We want to attract, develop, promote, and retain the best people based only on their ability and behavior.\nDisclaimer: Quento Technologies S.A. collects and processes personal data in accordance with the EU General Data Protection Regulation (GDPR). We are bound to use the information provided within your job application for recruitment purposes only and not to share these with any third parties. 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