{"id":1457417,"url":"https://alion.io/job/itds-poland-senior-fullstack-developer-net-react","title":"Senior Fullstack Developer (.NET & React)","company":{"id":879,"name":"ITDS Poland","domain":"itds.pl","url":"https://alion.io/company/itds","size_band":"201-500","is_staffing_agency":false,"employer_type":"staffing","is_intermediary":false,"listed_via":null,"ats_vendor":null,"truth_index":null},"role":"Backend","role_family":"Backend","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":["Warsaw, Poland"],"countries":["PL"],"hiring_countries":[],"hiring_countries_total":0,"salary":{"min":18900,"max":24150,"currency":"PLN","period":"month","gross":null,"usd_annual":75300},"salary_estimate":null,"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":"Postman","optional":false},{"name":"React.js","optional":false},{"name":"Scrum","optional":false},{"name":"SQL","optional":false},{"name":"JavaScript","optional":true}],"status":"live","first_seen_at":"2026-09-29T10:20:12Z","employer_posted_date":null,"last_verified_at":"2026-09-29T10:20:12Z","board_verified":false,"closed_at":null,"days_open":1,"trust":{"level":"not_scored","repost_count":null,"flags":[],"days_open":1},"description":"Ignite innovation in software development - shape the future with cutting-edge .NET and React solutions!\nWarsaw or Gdańsk-based opportunity with hybrid work model (1day/ week in the office).\nAs a Senior Fullstack Developer, you will be working for our client, a leading technology innovator. You'll contribute to building sophisticated applications by leveraging your expertise in C# and React, helping to deliver impactful digital solutions. Join us and propel your career into new dimensions of success and innovation.\nYour main responsibilities:\nDevelop high-quality software using C# (.Net Framework, .Net Standard, .Net Core) in accordance with technical documentation.\nImplement frontend features and interfaces with React (versions 18+).\nAnalyze and enhance existing codebases, including legacy systems.\nDesign and develop scalable architecture solutions.\nCollaborate closely with cross-functional teams-testers, analysts, and product owners-within agile (SCRUM) environments.\nDebug, profile, and optimize application performance.\nApply best practices such as DDD, CleanCode, and SOLID principles.\nWork with SQL Server and TSQL using SQL Management Studio.\nUtilize Visual Studio for development processes.\nIt is a strong plus if you have:\nExperience in creating views for mobile applications.\nBackground developing solutions for the financial sector.\nKnowledge of test automation tools like Postman or PlayWright.\nFamiliarity with WCAG standards.\nYou should have:\nMinimum 5 years of software development experience in .NET applications.\nAt least 3 years working with React.\nProficiency in Polish and a communicative level of English (min. B2).\nWell-developed analytical thinking abilities.\nExcellent organizational skills and attention to quality and deadlines.\nSecondary education, preferably higher education in computer science or related fields.\nLanguage required for the role:\nPolish (fluent),\nEnglish (communicative).\nEligibility for the role: Only candidates with 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.","description_format":"text","description_chars":2250,"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":"Polish","level":"Advanced (C1)","optional":false},{"language":"English","level":"Upper-Intermediate (B2)","optional":false}]},"benefits":["Hybrid work"],"hiring_locations":[],"hiring_excludes":[],"relocation_offered":false,"industries":["IT Consulting & Digital Transformation","IT Staffing & Staff Augmentation"],"lifecycle":[{"event":"open","at":"2026-09-29T10:44:31Z"}],"liveness":{"score":90,"band":"hot","label":"Hiring now","p_open":1,"p_active":0.903,"p_room":1,"age_days":0,"expected_fill_days":46,"reasons":["seen:0","velocity","win:early"],"computed_at":"2026-09-30T05:45:00Z"},"pay":{"stated_usd_annual":75300,"is_top_pay":false},"html_url":"https://alion.io/job/itds-poland-senior-fullstack-developer-net-react","json_url":"https://alion.io/job/itds-poland-senior-fullstack-developer-net-react.json","meta":{"generated_at":"2026-10-01T02:53:27Z","cache_seconds":300,"methodology":"https://alion.io/methodology","terms":"https://alion.io/terms","contact":"https://alion.io/contact","api":"https://alion.io/developers","usage":{"tier":"crawler","counted_by":"address","units_charged":1,"used_today":2267,"day_limit":5000,"remaining_today":2733,"minute_limit":60,"resets_at":"2026-10-02T00:00:00Z"}}}