{"id":635336,"url":"https://alion.io/job/sd-worx-poland-back-end-net-developer","title":"Back-end .NET Developer","company":{"id":2591,"name":"SD Worx","domain":"sdworx.com","url":"https://alion.io/company/sd-worx-poland","size_band":"501-1000","is_staffing_agency":false,"employer_type":"direct","is_intermediary":false,"listed_via":null,"ats_vendor":"Teamtailor","truth_index":{"grade":"B","score":83,"open_postings":30,"ghost_share":0,"stale_share":0.667,"repost_share":0,"time_to_fill_p50_days":53,"computed_at":"2026-10-29T05:49:05Z"}},"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":["Málaga, Spain"],"countries":["ES"],"hiring_countries":[],"hiring_countries_total":0,"salary":null,"salary_estimate":{"min_usd":51000,"max_usd":109000,"period":"year","method":"role_seniority_country_remote_cell","sample_n":34},"experience_years_min":5,"visa_sponsorship":false,"relocation_package":false,"has_equity":false,"technologies":[{"name":".NET","optional":false},{"name":"Agile","optional":false},{"name":"C#","optional":false},{"name":"CI/CD","optional":false},{"name":"Entity Framework Core","optional":false},{"name":"Master Data Management","optional":false},{"name":"Rest API","optional":false},{"name":"SOAP","optional":false},{"name":"SQL","optional":false}],"status":"live","first_seen_at":"2026-07-31T06:50:18Z","employer_posted_date":"2026-07-31","last_verified_at":"2026-10-29T05:42:04Z","board_verified":true,"closed_at":null,"days_open":90,"trust":{"level":"ok","repost_count":1,"flags":[],"days_open":89},"description":"SD Worx is a leading European provider of Payroll & HR services with global reach. We have offices across Europe and in Mauritius. Our purpose is to bring people solutions to life, enabling organisations of all sizes to turn Human Resources into a source of value for both the business and its people.\nOur people solutions cover the entire employee journey - from getting people paid to attracting, rewarding and developing talent.\n\nAbout the role:\nWe are seeking a Senior Back-end .NET Developer to join our Corporate Data Management (CDM) team within the Data & AI organization at SD Worx. The team is responsible for ensuring central, well-integrated corporate data across the enterprise and enabling seamless data flows between business-critical systems. This is a growth position created to strengthen our long-term in-house .NET development capabilities and support strategic initiatives such as Master Data Management and integrations with enterprise platforms. You will play a key role in designing, developing, and maintaining backend solutions that support data integration, business processes, and enterprise applications across the organization. The ideal candidate is a hands-on developer with strong .NET expertise, a proactive mindset, and the ability to collaborate effectively with technical and business stakeholders.\nWhich tasks can you expect?\nDesign, develop, and maintain back-end applications using .NET Framework, .NET Core and C#.\n\nDevelop and support integrations between corporate systems, legacy applications, and data platforms.\n\nContribute to the implementation of the Master Data Management (MDM 2.0) initiative and related integration projects.\n\nDeliver high-quality software in line with agreed timelines, standards, and best practices.\n\nPerform root cause analysis, troubleshoot issues, and drive resolution of defects.\n\nWrite, maintain, and execute unit and integration tests as part of the development lifecycle.\n\nConduct code reviews and contribute to continuous improvements in code quality.\n\nCollaborate with Product Owners, Technical Leads, and cross-functional teams to translate business requirements into technical solutions.\n\nEnsure solutions are scalable, maintainable, and aligned with architectural guidelines.\n\nSupport CI/CD processes and application deployment activities.\n\nCreate and maintain technical documentation, development standards, and solution designs.\n\nTake ownership of development activities and proactively identify areas for process and system improvements.\nWhat do you have to offer?\n\nMinimum 5 years of hands-on experience developing back-end applications with .NET Framework, .NET Core, and C#.\n\nStrong understanding of software development principles, application architecture, and integration patterns.\n\nExperience building and consuming REST and SOAP services.\n\nSolid knowledge of SQL Server, Entity Framework, and database design best practices.\n\nExperience writing Unit and Integration Tests as part of a quality-driven development approach.\n\nAbility to translate business requirements into scalable and maintainable technical solutions.\n\nExcellent analytical, problem-solving, and troubleshooting skills.\n\nStrong communication skills in English and ability to collaborate effectively with technical and business stakeholders.\n\nExperience working in Agile teams and international environments.\n\nA proactive, self-starting mindset with a passion for continuous learning and improvement.\n\nAbility to manage multiple priorities while maintaining high quality standards.\n\nWhat do we have to offer?\n Comprehensive training and development programs.\n Flexible working schedule\n Private medical insurance 100% covered by SD Worx\n 25 vacation days \n 18 hours for personal matters\n Reduced summer hours: 36 hours instead of 40 per week, for 4 weeks (to be chosen in July or August)\n Cobee flexible retribution options: meals, transportation, etc.\n Laptop and equipment provided\n Workation: possibility to work from abroad (where SD Worx has legal entity, up to 4 weeks per year)\n Learning opportunities: language courses (as per availability), individual training bonus, an individual development plan, and professional training\n Career growth: whether you want to become more of an expert in your field or want to expand your knowledge more horizontally, there is always room to grow within SD Worx!\nFrom many places, we work as one, moving from better to best together.\nSD Worx embraces diversity in the workplace. Diversity brings inspiration and innovation to our company. We particularly welcome applications from qualified talent, regardless of origin, nationality, gender, skin color, ethnic and social background, religion, age, disability, sexual orientation, or stage of life.\nSalary range information will be shared with candidates during the initial interaction with the Talent Acquisition team, either by phone or email.\nAll hiring decisions are made based on skills, experience and role-related qualifications.\nAll hiring decisions are made based on skills, experience and role-related qualifications.","description_format":"text","description_chars":5079,"description_truncated":false,"requirements":{"experience_years_min":5,"management_years_min":null,"team_size_min":null,"manages_managers":false,"education":null,"security_clearance":false,"languages":[{"language":"English","level":"All levels","optional":false}]},"benefits":["Continuous learning","Flexible schedule","Health insurance"],"hiring_locations":[],"hiring_excludes":[],"relocation_offered":false,"industries":["Human Resources","Payroll Services","HR & Payroll Software"],"lifecycle":[{"event":"open","at":"2026-09-10T19:41:21Z"},{"event":"close","at":"2026-09-13T22:49:40Z"},{"event":"reopen","at":"2026-10-21T17:25:31Z"}],"visa":[],"liveness":{"score":20,"band":"cold","label":"Long shot","p_open":1,"p_active":0.544,"p_room":0.36,"age_days":89,"expected_fill_days":53,"reasons":["conf:0","stale_co","velocity","win:tail","crowd:brand"],"computed_at":"2026-10-29T05:49:05Z"},"pay":null,"html_url":"https://alion.io/job/sd-worx-poland-back-end-net-developer","json_url":"https://alion.io/job/sd-worx-poland-back-end-net-developer.json","meta":{"generated_at":"2026-10-29T07:12:42Z","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":10913,"day_limit":null,"remaining_today":null,"minute_limit":300,"resets_at":"2026-10-30T00:00:00Z"}},"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":2591},"rest":"https://alion.io/mcp/rest/get_company?id=2591"},"human":"https://alion.io/catalog?offer=company.slices&for=job%2Fsd-worx-poland-back-end-net-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%2Fsd-worx-poland-back-end-net-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%2Fsd-worx-poland-back-end-net-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/sd-worx-poland-back-end-net-developer\", \"note\": \"what you need it for\"}"},"human":"https://alion.io/catalog?offer=company.verify&for=job%2Fsd-worx-poland-back-end-net-developer"}],"agent":{"mcp":"https://alion.io/mcp/jobs","mcp_open":"https://alion.io/mcp/open","next":[{"tool":"get_job","arguments":{"id":635336}},{"tool":"search_jobs","arguments":{"company":"sdworx.com","detail":"compact"}},{"tool":"match_people","arguments":{"job_id":635336},"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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