{"id":2772861,"url":"https://alion.io/job/ust-fullstack-developer","title":"Fullstack Developer","company":{"id":1774626,"name":"UST","domain":"ust.com","url":"https://alion.io/company/ust-com","size_band":"5000+","is_staffing_agency":false,"employer_type":"direct","is_intermediary":false,"listed_via":null,"ats_vendor":"RippleHire","truth_index":null},"role":"Backend","role_family":"Backend","seniority":null,"employment_type":null,"work_mode":"hybrid","remote_scope":null,"remote_scope_basis":null,"remote_working_hours":null,"hiring_geo_confidence":"structured","locations":["Madrid, Spain"],"countries":["ES"],"hiring_countries":[],"hiring_countries_total":0,"salary":null,"salary_estimate":{"min_usd":46000,"max_usd":110000,"period":"year","method":"role_country_seniority_unknown","sample_n":81},"experience_years_min":null,"visa_sponsorship":false,"relocation_package":false,"has_equity":false,"technologies":[{"name":"Agile","optional":false},{"name":"ASP.NET Core","optional":false},{"name":"CI/CD","optional":false},{"name":"Git","optional":false},{"name":"JavaScript","optional":false},{"name":"Kanban","optional":false},{"name":"React.js","optional":false},{"name":"Scrum","optional":false},{"name":"Spring Boot","optional":false},{"name":"SQL","optional":false},{"name":"TypeScript","optional":false},{"name":"C#","optional":true},{"name":"Java","optional":true}],"status":"live","first_seen_at":"2026-05-04T00:00:00Z","employer_posted_date":"2026-10-17","last_verified_at":"2026-10-17T16:24:56Z","board_verified":true,"closed_at":null,"days_open":166,"trust":{"level":"ok","repost_count":null,"flags":[],"days_open":166},"description":"We are still looking for the very Top Talent…and we would be delighted if you were to join our team!\nMore in details, UST is a multinational company based in North America, certified as a Top Employer and Great Place to Work company with over 35.000 employees all over the world and presence in more than 35 countries. We are leaders on digital technology services, and we provide large-scale technologic solutions to big companies.\nWhat we look for?\nA Fullstack Engineer with a strong expertise in React and Java or .NET Core to design, develop, and maintain frontend and backend components.\nWork Location\nHybrid. Madrid city center (Sol area). 3 days a week in the office + 2 days remote.\nMain tasks and accountabilities will be:\nDesign, develop, and maintain frontend components using React, aligned with enterprise UI standards.Implement user interfaces that integrate seamlessly with backend services built in Java (Spring Boot) or .NET Core.Consume RESTful APIs and ensure correct data handling, error states, and performance.Design, develop, and maintain backend services in a distributed, service-oriented architecture.Write and maintain unit and integration tests across frontend and backend components.Collaborate closely with backend developers, QA engineers, DevOps, and product stakeholders.Participate actively in refinement, planning, development, and delivery activities.Ensure code quality, maintainability, and alignment with architectural standards.\nSupport applications running in production, including analysis of frontend and backend issues.\nContribute to continuous improvement of development practices, tooling, and technical solutions.\nWhat UST expects from you?\nProven experience as a Full-Stack Developer in enterprise environments.\nStrong hands-on experience with React for frontend development.\nSolid experience integrating frontend applications with RESTful APIs.\nProven experience with backend development using Java and Spring Boot or .NET Core / ASP.NET Core.\nExperience working with relational databases and SQL (Oracle, SQL Server, or equivalent).\nFamiliarity with JavaScript / TypeScript and modern frontend practices.\nExperience with version control systems (Git).Understanding of Agile ways of working (Scrum / Kanban).Basic understanding of CI/CD concepts and DevOps environments.Awareness of production and operational aspects of applications.Strong problem-solving skills and ownership mindset.Comfortable working in complex, regulated enterprise environments.Good communication skills and fluency in English.What can we offer?\n23 days of Annual Leave plus the 24th and 31st of December as discretionary days!Numerous benefits (Heath Care Plan, Internet Connectivity, Life and Accident Insurances).`Retribución Flexible´ Program: (Meals, Kinder Garden, Transport, online English lessons, Heath Care Plan…)Free access to several training platformsProfessional stability and career plansUST also, compensates referrals from which you could benefit when you refer professionals.The option to pick between 12 or 14 payments along the year.Real Work Life Balance measures (flexibility, WFH or remote work policy, compacted hours during summertime…)UST Club Platform discounts and gym Access discountsIf you would like to know more, do not hesitate to apply and we’ll get in touch to fill you in details. UST is waiting for you!\nIn UST we are committed to equal opportunities in our selection processes and do not discriminate based on race, gender, disability, age, religion, sexual orientation or nationality. We have a special commitment to Disability & Inclusion, so we are interested in hiring people with disability certificate.","description_format":"text","description_chars":3669,"description_truncated":false,"requirements":{"experience_years_min":null,"management_years_min":null,"team_size_min":null,"manages_managers":false,"education":null,"security_clearance":false,"languages":[{"language":"English","level":"Advanced (C1)","optional":false}]},"benefits":["Annual leave"],"hiring_locations":[{"name":"Spain","iso":"ES","kind":"country"}],"hiring_excludes":[],"relocation_offered":false,"industries":["IT Consulting & Digital Transformation","IT Outsourcing & Dedicated Teams"],"lifecycle":[{"event":"open","at":"2026-10-17T06:55:26Z"}],"visa":[],"liveness":{"score":2,"band":"cold","label":"Long shot","p_open":1,"p_active":0.08,"p_room":0.28,"age_days":166,"expected_fill_days":14,"reasons":["conf:1","win:tail","crowd:brand"],"computed_at":"2026-10-17T17:39:31Z"},"pay":null,"html_url":"https://alion.io/job/ust-fullstack-developer","json_url":"https://alion.io/job/ust-fullstack-developer.json","meta":{"generated_at":"2026-10-17T17:39:31Z","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":23,"day_limit":null,"remaining_today":null,"minute_limit":300,"resets_at":"2026-10-18T00:00:00Z"}},"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":1774626},"rest":"https://alion.io/mcp/rest/get_company?id=1774626"},"human":"https://alion.io/catalog?offer=company.slices&for=job%2Fust-fullstack-developer"},{"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%2Fust-fullstack-developer"},{"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%2Fust-fullstack-developer"},{"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/ust-fullstack-developer\", \"note\": \"what you need it for\"}"},"human":"https://alion.io/catalog?offer=company.verify&for=job%2Fust-fullstack-developer"}]}