{"id":2908301,"url":"https://alion.io/job/99x-senior-back-end-engineer","title":"Senior Back-End Engineer","company":{"id":62433,"name":"99X","domain":"99x.io","url":"https://alion.io/company/99x","size_band":null,"is_staffing_agency":false,"employer_type":"direct","is_intermediary":false,"listed_via":null,"ats_vendor":"Zoho Recruit","truth_index":null},"role":"Backend","role_family":"Backend","seniority":"senior","employment_type":"full_time","work_mode":"on_site","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":34000,"max_usd":85000,"period":"year","method":"role_seniority_country_remote_cell","sample_n":52},"experience_years_min":3,"visa_sponsorship":false,"relocation_package":false,"has_equity":false,"technologies":[{"name":"Java","optional":false},{"name":"Quarkus","optional":false},{"name":"Spring Boot","optional":false},{"name":"Agile","optional":true},{"name":"Azure","optional":true},{"name":"CI/CD","optional":true}],"status":"live","first_seen_at":"2026-08-28T00:00:00Z","employer_posted_date":"2026-08-28","last_verified_at":"2026-10-24T05:58:29Z","board_verified":true,"closed_at":null,"days_open":57,"trust":{"level":"ok","repost_count":null,"flags":[],"days_open":57},"description":"We are looking for a Backend Java Engineer to join our team and help design, develop, and maintain scalable, high-performance backend services that support critical business applications.\nIn this role, you will be responsible for building robust and efficient solutions, ensuring code quality, and contributing to the continuous improvement of our software development practices. You will work closely with cross-functional teams in a dynamic and international environment.\nThe role combines backend development, software engineering best practices, and operational excellence, with a strong focus on scalability, maintainability, and performance.\nResponsibilities:\nDesign, develop, and maintain scalable backend services and APIs using Java frameworks such as:\nQuarkus\nSpring Boot\nEnsure application reliability, performance, and scalability across all environments\nPromote and implement continuous improvement initiatives within the software development lifecycle\nApply software engineering best practices to:\nDevelop high-quality code\nImprove maintainability\nIncrease development efficiency\nAnalyze, troubleshoot, and resolve complex application issues\nConduct root cause analysis\nPerform post-mortem activities to prevent recurrence\nMonitor and optimize application performance and resource utilization\nSupport the evolution of backend architecture and future technical decisions\nEnsure code quality through:\nAutomated testing\nPeer code reviews\nClean Code principles\nCollaborate with:\nDevelopers\nArchitects\nProduct Owners\nManagers\nExternal stakeholders\nEnsure timely delivery and alignment across distributed teams\nParticipate in production support and incident resolution activities when required\nRequirements:\n3+ years of experience in a Backend Software Engineering role\nStrong knowledge of Java fundamentals, including:\nCollections\nClasses\nInterfaces\nEnums\nInheritance\nException handling\nHands-on experience in the design, development, and operation of scalable backend services using:\nQuarkus\nSpring Boot\nSolid understanding of:\nDatabases\nTransaction management\nData persistence concepts\nExperience ensuring code quality through:\nAutomated testing\nCode reviews\nClean Code principles\nStrong experience in:\nPerformance optimization\nTroubleshooting production environments\nRoot cause analysis\nExcellent problem-solving and analytical skills\nAbility to work with:\nAutonomy and ownership\nProactivity and leadership\nCollaboration and a continuous improvement mindset\nExcellent communication and interpersonal skills\nStrong presentation abilities\nTeam-oriented attitude\nFluent English proficiency (mandatory, minimum B2 level)\nNice-to-have:\nDegree in Computer Engineering, Computer Science, or a related field\nExperience with cloud environments (preferably Azure)\nKnowledge of containerized applications and microservices architectures\nExperience with CI/CD pipelines and DevOps practices\nFamiliarity with Agile methodologies\nExperience working in large-scale or enterprise environments\nStrong focus on innovation, automation, and continuous improvement\nIf this sounds like you, share your CV with us and let's talk!","description_format":"text","description_chars":3118,"description_truncated":false,"requirements":{"experience_years_min":3,"management_years_min":null,"team_size_min":null,"manages_managers":false,"education":{"level":"bachelor","optional":true},"security_clearance":false,"languages":[{"language":"English","level":"Advanced (C1)","optional":false}]},"benefits":[],"hiring_locations":[],"hiring_excludes":[],"relocation_offered":false,"industries":["Artificial Intelligence","Commerce","IT Outsourcing & Dedicated Teams","Digital Goods"],"lifecycle":[{"event":"open","at":"2026-10-20T08:40:37Z"}],"visa":[],"liveness":{"score":21,"band":"cold","label":"Long shot","p_open":1,"p_active":0.596,"p_room":0.35,"age_days":57,"expected_fill_days":28,"reasons":["conf:0","velocity","win:tail"],"computed_at":"2026-10-24T06:02:35Z"},"pay":null,"html_url":"https://alion.io/job/99x-senior-back-end-engineer","json_url":"https://alion.io/job/99x-senior-back-end-engineer.json","meta":{"generated_at":"2026-10-24T06:11:07Z","cache_seconds":300,"methodology":"https://alion.io/methodology","terms":"https://alion.io/terms","contact":"https://alion.io/contact","api":"https://alion.io/developers","about":"Alion is a live layer of people, companies and AI agents: who they are, whether they are real and active right now, what they do and how to work with them, readable by people and by agents and paid per call.","catalog":"https://alion.io/catalog.json","usage":{"tier":"crawler_verified","counted_by":"address","units_charged":1,"used_today":8927,"day_limit":null,"remaining_today":null,"minute_limit":300,"resets_at":"2026-10-25T00:00:00Z"}},"offers":[{"id":"company.slices","title":"One company in depth, by slice","status":"live","price":{"credits":0.02,"usd":0.002,"plus_per_slice":{"credits":0.05,"usd":0.005}},"unit":"per company, plus each slice with data","note":"the employer in depth","call":{"mcp_tool":"get_company","arguments":{"id":62433},"rest":"https://alion.io/mcp/rest/get_company?id=62433"},"human":"https://alion.io/catalog?offer=company.slices&for=job%2F99x-senior-back-end-engineer"},{"id":"market.stats","title":"A market slice: pay, demand and time to fill","status":"live","price":{"credits":1,"usd":0.1},"unit":"per slice","note":"pay, demand and time to fill for this role and place","call":{"mcp_tool":"market_stats"},"human":"https://alion.io/catalog?offer=market.stats&for=job%2F99x-senior-back-end-engineer"},{"id":"job.search","title":"Open jobs by role, technology, place, pay and visa","status":"live","price":{"credits":0.02,"usd":0.002},"unit":"per posting in a list","note":"similar open postings","call":{"mcp_tool":"search_jobs"},"human":"https://alion.io/catalog?offer=job.search&for=job%2F99x-senior-back-end-engineer"},{"id":"company.verify","title":"Is this company real and active right now","status":"pilot","price":null,"unit":"per company","request":{"url":"https://alion.io/catalog/request","method":"POST","body":"{\"offer\": \"company.verify\", \"for\": \"job/99x-senior-back-end-engineer\", \"note\": \"what you need it for\"}"},"human":"https://alion.io/catalog?offer=company.verify&for=job%2F99x-senior-back-end-engineer"}]}