{"id":3021279,"url":"https://alion.io/job/spyrosoft-senior-frontend-developer-react","title":"Senior Frontend Developer (React)","company":{"id":933,"name":"Spyrosoft","domain":"spyro-soft.com","url":"https://alion.io/company/spyrosoft","size_band":null,"is_staffing_agency":false,"employer_type":"direct","is_intermediary":false,"listed_via":null,"ats_vendor":"Teamtailor","truth_index":{"grade":"A","score":92,"open_postings":88,"ghost_share":0,"stale_share":0.511,"repost_share":0,"time_to_fill_p50_days":16,"computed_at":"2026-10-24T06:02:35Z"}},"role":"Frontend","role_family":"Frontend","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":["Wrocław, Poland","Kraków, Poland","Łódź, Poland","Szczecin, Poland","Warsaw, Poland"],"countries":["PL"],"hiring_countries":[],"hiring_countries_total":0,"salary":null,"salary_estimate":{"min_usd":52000,"max_usd":89000,"period":"year","method":"role_seniority_country_remote_cell","sample_n":39},"experience_years_min":5,"visa_sponsorship":false,"relocation_package":false,"has_equity":false,"technologies":[{"name":"CI/CD","optional":false},{"name":"Confluence","optional":false},{"name":"Git","optional":false},{"name":"GitLab","optional":false},{"name":"JavaScript","optional":false},{"name":"Jira","optional":false},{"name":"React.js","optional":false},{"name":"Rest API","optional":false},{"name":"Sass","optional":false},{"name":"State Management","optional":false},{"name":"styled-components","optional":false},{"name":"Tailwind CSS","optional":false},{"name":"TypeScript","optional":false},{"name":"Agile","optional":true},{"name":"GitLab CI","optional":true}],"status":"closed","first_seen_at":"2026-10-21T11:53:58Z","employer_posted_date":"2026-10-21","last_verified_at":"2026-10-23T22:35:39Z","board_verified":false,"closed_at":"2026-10-23T22:35:39Z","days_open":2,"trust":{"level":"not_scored","repost_count":null,"flags":[],"days_open":2},"description":"Tech Stack:\nReact\n\nTypeScript\n\nJavaScript (ES6+)\n\nHTML5\n\nCSS3\n\nStyled-components\n\nTailwind CSS\n\nSASS\n\nREST APIs\n\nGit\n\nGitLab\n\nCI/CD\n\nJira\n\nConfluence\n\nUnit Testing\n\nIntegration Testing\n\nE2E Testing\n\nRequired Qualifications:\nAt least 5 years of commercial experience in frontend web development.\n\nStrong practical experience with React and the broader React ecosystem.\n\nSolid understanding of rendering optimization techniques and state management solutions.\n\nAdvanced proficiency in TypeScript and modern JavaScript (ES6+).\n\nStrong knowledge of HTML5 and CSS3.\n\nHands-on experience with styling solutions such as Styled-components, Tailwind CSS, and SASS.\n\nProven experience building responsive, mobile-first web applications.\n\nExperience integrating frontend applications with RESTful APIs.\n\nGood understanding of software architecture principles and design patterns.\n\nExperience working with Git and modern development workflows.\n\nFamiliarity with CI/CD pipelines and deployment processes.\n\nExperience using collaboration tools such as Jira and Confluence.\n\nStrong analytical thinking and problem-solving skills.\n\nAbility to work independently and effectively manage priorities.\n\nVery good English skills (B2/C1), both written and spoken.\n\nNice to Have:\nExperienced in using AI tools in day-to-day workflow\n\nProject Description:\nWe are looking for an experiencedSenior React Developer to join a team responsible for delivering modern, user-centric web applications for international clients. 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