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You will help design and develop high-performance Java applications, ensuring seamless integration and functionality across platforms, driving impactful digital change. This role offers the chance to expand your expertise within a dynamic, forward-thinking environment.\nYour main responsibilities:\nDesign and develop Java applications based on detailed client requirements.\nBuild and maintain REST APIs using Spring, ensuring scalable and efficient integration.\nCollaborate with clients to understand their needs and deliver tailored software solutions.\nOversee overall application architecture and design, ensuring best practices and optimal performance.\nIdentify, troubleshoot, and resolve technical issues promptly.\nWork closely with cross-functional teams to deliver high-quality, innovative software products.\nYou're ideal for this role if you have:\n4+ years of hands-on experience in Java development, focusing on enterprise applications.\nStrong expertise in designing and implementing REST APIs and working with Spring Framework.\nProven ability to collaborate with clients and cross-disciplinary teams to meet project goals.\nExcellent problem-solving skills and a keen eye for technical detail.\nIt is a strong plus if you have:\nExperience with front-end technologies or fullstack development.\nRelevant certifications in Java or Spring.\nLanguage required for the role:\nFluent English.\nEligibility to work on this role:\nOnly candidates with an existing legal right to work in the European Union will be considered for this role.\n#MAKEYourCareerBETTER\nInterested? Apply now and include your CV (preferably in English) along with a statement confirming your consent to the processing and storage of your personal data.\n\nhttps://itdsportugal.com/en/it-jobs/10252/?utm_source=itjobs","description_format":"text","description_chars":2121,"description_truncated":false,"requirements":{"experience_years_min":4,"management_years_min":null,"team_size_min":null,"manages_managers":false,"education":null,"security_clearance":false,"languages":[]},"benefits":["Hybrid work"],"hiring_locations":[],"hiring_excludes":[],"relocation_offered":false,"industries":["Information Technology","IT Outsourcing & Dedicated Teams","IT Staffing & Staff Augmentation"],"lifecycle":[{"event":"open","at":"2026-11-04T00:56:30Z"}],"visa":[],"liveness":{"score":90,"band":"hot","label":"Hiring now","p_open":1,"p_active":0.903,"p_room":1,"age_days":1,"expected_fill_days":30,"reasons":["seen:1","velocity","win:early"],"computed_at":"2026-11-04T06:34:25Z"},"pay":null,"html_url":"https://alion.io/job/itds-portugal-senior-fullstack-java-developer-rest-api-spring-expertise","json_url":"https://alion.io/job/itds-portugal-senior-fullstack-java-developer-rest-api-spring-expertise.json","meta":{"generated_at":"2026-11-05T00:05:19Z","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":18,"day_limit":null,"remaining_today":null,"minute_limit":300,"resets_at":"2026-11-06T00:00:00Z"}},"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":4374591},"rest":"https://alion.io/mcp/rest/get_company?id=4374591"},"human":"https://alion.io/catalog?offer=company.slices&for=job%2Fitds-portugal-senior-fullstack-java-developer-rest-api-spring-expertise"},{"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%2Fitds-portugal-senior-fullstack-java-developer-rest-api-spring-expertise"},{"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%2Fitds-portugal-senior-fullstack-java-developer-rest-api-spring-expertise"},{"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/itds-portugal-senior-fullstack-java-developer-rest-api-spring-expertise\", \"note\": \"what you need it for\"}"},"human":"https://alion.io/catalog?offer=company.verify&for=job%2Fitds-portugal-senior-fullstack-java-developer-rest-api-spring-expertise"}],"agent":{"mcp":"https://alion.io/mcp/jobs","mcp_open":"https://alion.io/mcp/open","next":[{"tool":"get_job","arguments":{"id":3716502}},{"tool":"search_jobs","arguments":{"company":"itdsportugal.com","detail":"compact"}},{"tool":"match_people","arguments":{"job_id":3716502},"note":"people open to offers who fit this vacancy"}],"note":"The same data through MCP tools: https://alion.io/mcp/open needs no sign-in (compact searches, postings, people); https://alion.io/mcp with an Alion account has everything. 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