{"id":8917,"date":"2026-09-29T11:55:33","date_gmt":"2026-09-29T09:55:33","guid":{"rendered":"https:\/\/itds.pl\/it-jobs\/8917\/"},"modified":"2026-09-29T12:07:16","modified_gmt":"2026-09-29T10:07:16","slug":"senior-fullstack-developer-net-react","status":"publish","type":"matador-job-listings","link":"https:\/\/itds.pl\/pl\/praca\/senior-fullstack-developer-net-react\/","title":{"rendered":"Senior Fullstack Developer (.NET &amp; React)"},"content":{"rendered":"<h3><strong>Ignite innovation in software development &#8211;&nbsp;shape the future with cutting-edge .NET and React solutions!<\/strong><\/h3> <p><em>Warsaw or Gda\u0144sk-based opportunity with hybrid work model (1day\/ week in the office).<\/em><\/p> <p>As a Senior Fullstack Developer, you will be working for our client, a leading technology innovator. You\u2019ll 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.<\/p> <h3><strong>Your main responsibilities:<\/strong><\/h3> <ul> <li>Develop high-quality software using C# (.Net Framework, .Net Standard, .Net Core) in accordance with technical documentation.<\/li> <li>Implement frontend features and interfaces with React (versions 18+).<\/li> <li>Analyze and enhance existing codebases, including legacy systems.<\/li> <li>Design and develop scalable architecture solutions.<\/li> <li>Collaborate closely with cross-functional teams\u2014testers, analysts, and product owners\u2014within agile (SCRUM) environments.<\/li> <li>Debug, profile, and optimize application performance.<\/li> <li>Apply best practices such as DDD, CleanCode, and SOLID principles.<\/li> <li>Work with SQL Server and TSQL using SQL Management Studio.<\/li> <li>Utilize Visual Studio for development processes.<\/li> <\/ul> <h3><strong>It is a strong plus if you have:<\/strong><\/h3> <ul> <li>Experience in creating views for mobile applications.<\/li> <li>Background developing solutions for the financial sector.<\/li> <li>Knowledge of test automation tools like Postman or PlayWright.<\/li> <li>Familiarity with WCAG standards.<\/li> <\/ul> <h3><strong>You should have:<\/strong><\/h3> <ul> <li>Minimum 5 years of software development experience in .NET applications.<\/li> <li>At least 3 years working with React.<\/li> <li>Proficiency in Polish and a communicative level of English (min. B2).<\/li> <li>Well-developed analytical thinking abilities.<\/li> <li>Excellent organizational skills and attention to quality and deadlines.<\/li> <li>Secondary education, preferably higher education in computer science or related fields.<\/li> <\/ul> <h3><strong>Language required for the role:<\/strong><\/h3> <ul> <li>Polish (fluent),<\/li> <li>English (communicative).<\/li> <\/ul> <p>Eligibility for the role: Only candidates with existing legal right to work in the European Union will be considered for this role.<\/p> <p><strong>#MAKEYourCareerBETTER<\/strong><\/p> <p>Interested? 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.<\/p> <nav class=\"matador-job-navigation\"> <ul> <li> <a href=\"https:\/\/itds.pl\/pl\/?wpid=8917&amp;bhid=10180\" rel=\"button\" class=\"matador-button\" title=\"Apply Now\">Apply Now<\/a> <\/li> <li> <a href=\"https:\/\/itds.pl\/pl\/praca\/senior-fullstack-developer-net-react\/\" rel=\"button\" class=\"matador-button matador-button-secondary\" title=\"More Info\">More Info<\/a> <\/li> <\/ul> <\/nav> ","protected":false},"excerpt":{"rendered":"<p>Ignite innovation in software development &#8211;&nbsp;shape the future with cutting-edge .NET and React solutions! Warsaw or Gda\u0144sk-based opportunity with hybrid work model (1day\/ week in the office). As a Senior Fullstack Developer, you will be working for our client, a leading technology innovator. You\u2019ll contribute to building sophisticated applications by leveraging your expertise in C# &hellip; <a href=\"https:\/\/itds.pl\/pl\/praca\/senior-fullstack-developer-net-react\/\">Continued<\/a><\/p>\n","protected":false},"template":"","meta":{"_acf_changed":false,"_matador_source_id":"10180"},"matador-categories":[],"matador-locations":[26],"matador-types":[25],"matador-remote-job-possible":[181],"matador-skills":[183],"matador-seniority":[177],"matador-position":[],"matador-technology":[],"matador-contract-type":[402],"matador-priority":[284],"matador-language":[178],"matador-place":[437,442],"matador-visibility":[704],"matador-choose-website-to-publis":[449],"class_list":["post-8917","matador-job-listings","type-matador-job-listings","status-publish","hentry","matador-locations-warszawa","matador-types-contract","matador-remote-job-possible-hybrid","matador-skills-developer","matador-seniority-senior","matador-contract-type-b2b","matador-priority-0-urgent","matador-language-polish","matador-place-warszawa","matador-place-gdansk","matador-visibility-online","matador-choose-website-to-publis-poland"],"acf":[],"yoast_head":"<!-- This site is optimized with the Yoast SEO plugin v28.5 - https:\/\/yoast.com\/product\/yoast-seo-wordpress\/ -->\n<title>Senior Fullstack Developer (.NET &amp; React) | ITDS<\/title>\n<meta name=\"robots\" content=\"index, follow, max-snippet:-1, max-image-preview:large, max-video-preview:-1\" \/>\n<link rel=\"canonical\" href=\"https:\/\/itds.pl\/pl\/praca\/senior-fullstack-developer-net-react\/\" \/>\n<meta property=\"og:locale\" content=\"pl_PL\" \/>\n<meta property=\"og:type\" content=\"article\" \/>\n<meta property=\"og:title\" content=\"Senior Fullstack Developer (.NET &amp; React) | ITDS\" \/>\n<meta property=\"og:description\" content=\"Ignite innovation in software development &#8211;&nbsp;shape the future with cutting-edge .NET and React solutions! 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