{"id":2406004,"url":"https://alion.io/job/syone-senior-pl-sql-developer","title":"Senior PL-SQL Developer","company":{"id":2555720,"name":"Syone","domain":"syone.com","url":"https://alion.io/company/syone","size_band":"51-200","is_staffing_agency":false,"employer_type":"services","is_intermediary":false,"listed_via":null,"ats_vendor":"Deel","truth_index":{"grade":"B","score":75,"open_postings":4,"ghost_share":0,"stale_share":1,"repost_share":0,"time_to_fill_p50_days":null,"computed_at":"2026-10-14T06:34:16Z"}},"role":"Data Science","role_family":"Data Science","seniority":"senior","employment_type":"full_time","work_mode":"hybrid","remote_scope":null,"remote_scope_basis":null,"remote_working_hours":null,"hiring_geo_confidence":"structured","locations":["Lisbon, Portugal"],"countries":["PT"],"hiring_countries":[],"hiring_countries_total":0,"salary":null,"salary_estimate":{"min_usd":36000,"max_usd":92000,"period":"year","method":"global_role_cell_scaled_by_country","sample_n":2157},"experience_years_min":6,"visa_sponsorship":false,"relocation_package":false,"has_equity":false,"technologies":[{"name":"Agile","optional":false},{"name":"CI/CD","optional":false},{"name":"GDPR","optional":false},{"name":"Kanban","optional":false},{"name":"Oracle","optional":false},{"name":"Scrum","optional":false},{"name":"SQL","optional":false}],"status":"live","first_seen_at":"2026-09-29T18:10:37Z","employer_posted_date":"2026-09-29","last_verified_at":"2026-10-14T22:49:13Z","board_verified":true,"closed_at":null,"days_open":15,"trust":{"level":"ok","repost_count":null,"flags":[],"days_open":15},"description":"Job details\nWe are looking for Senior PL-SQL Developer to join our team in Porto. In this role, you will be responsible for driving end-to-end application development-covering new features, system evolutions, and continuous application support. The ideal candidate possesses a strong passion for SQL engineering, deep expertise in query performance tuning, and a proactive mindset.\nMain Tasks and Responsabilities:\nEnd-to-End Application Development: Take ownership of the full software development lifecycle (SDLC), including requirements analysis, architectural design, coding, testing, and production deployment.\n\nRequirements Refinement: Analyze and understand business needs, maintaining a critical vision to propose proactive, innovative solutions.\n\nAdvanced Database Engineering: Design and build complex queries, ensuring high database performance, code scalability, and optimized index/partition strategies.\n\nQuality Assurance: Implement regular testing cycles using Test-Driven Development (TDD) practices to enforce code quality and stability.\n\nApplication Support & Maintenance: Diagnose, troubleshoot, and resolve critical technical challenges and environment issues.\n\nOperational Availability: Participate in on-call activities to guarantee application reliability and business continuity.\n\nWhat you will need to bring:\nOracle PL/SQL Expertise: At least 6 years of professional experience operating as a dedicated Oracle PL/SQL developer handling complex database ecosystems.\n\nAdvanced SQL Proficiency: Exceptional skills in performance optimization, rewriting legacy SQL code, and structuring highly complex database queries.\n\nAgile Methodologies: Complete comfort working within dynamic project environments using Scrum and Kanban frameworks.\n\nDevOps Infrastructure: Hands-on experience with modern code versioning workflows, along with continuous integration and continuous deployment (CI/CD) pipelines.\n\nTesting Standards: Strong practical background in Test-Driven Development (TDD) methodologies.\n\nLanguage Proficiency: Fluent English (minimum B2 level) is strictly mandatory for seamless communication within a culturally diverse team environment.\n\nWhat can Syone offer:\nIntegration in an organization with profound and sustained growth and involvement in pioneering projects with innovative technological solutions;\n\nStrong IT training plans;\n\nProfessional evolution with intervention in ambitious technological projects, both national and internationally;\n\nOpportunity to work on a large-scale international infrastructure migration project;\n\nIntegration in a multidisciplinary and technically challenging environment.\n\nBy applying, you accept our GDPR policies. Your personal data in your CV and documents will be used solely for processing your application at SYONE. SYONE, S.A. (NIPC 504729624) is the data controller, located at Rua Alfredo da Silva, 8-A, Edifício Stern, Piso 3D, 2610-016 Amadora. We will use your data to tailor your application to relevant vacancies and for potential employment contracts. If selected, your data will be kept during your employment and for at least two years after. If not selected, your data will be kept for two years for future vacancies and then deleted, except for your contact details. You can exercise your rights (access, rectification, erasure, etc.) by emailing . Your data may be shared with our HR service providers and will be stored securely. You can withdraw your consent at any time. We will not use your data for other purposes without your express consent. 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