{"id":2079172,"url":"https://alion.io/job/io-digital-medior-senior-front-end-engineer","title":"Medior / Senior Front-end Engineer","company":{"id":45365,"name":"iO Digital","domain":"iodigital.com","url":"https://alion.io/company/io-tech-hub","size_band":"1001-5000","is_staffing_agency":false,"employer_type":"direct","is_intermediary":false,"listed_via":null,"ats_vendor":"Recruitee","truth_index":{"grade":"A","score":91,"open_postings":74,"ghost_share":0,"stale_share":0.568,"repost_share":0,"time_to_fill_p50_days":20,"computed_at":"2026-10-24T06:02:35Z"}},"role":"Frontend","role_family":"Frontend","seniority":"senior","employment_type":null,"work_mode":"on_site","remote_scope":null,"remote_scope_basis":null,"remote_working_hours":null,"hiring_geo_confidence":"structured","locations":["Rotterdam, Netherlands"],"countries":["NL"],"hiring_countries":[],"hiring_countries_total":0,"salary":null,"salary_estimate":{"min_usd":55000,"max_usd":116000,"period":"year","method":"role_seniority_country_remote_cell","sample_n":12},"experience_years_min":null,"visa_sponsorship":false,"relocation_package":false,"has_equity":false,"technologies":[{"name":"AI Agents","optional":false},{"name":"ESLint","optional":false},{"name":"Next.js","optional":false},{"name":"Prettier","optional":false},{"name":"React.js","optional":false},{"name":"SonarQube","optional":false},{"name":"TypeScript","optional":false},{"name":"JavaScript","optional":true}],"status":"live","first_seen_at":"2026-10-08T09:07:16Z","employer_posted_date":"2026-10-08","last_verified_at":"2026-10-24T13:26:48Z","board_verified":true,"closed_at":null,"days_open":16,"trust":{"level":"ok","repost_count":null,"flags":[],"days_open":16},"description":"Wat ga je doen?\nBen jij een front-ender die niet alleen bouwt wat gevraagd wordt, maar ook meedenkt over architectuur, kwaliteit bewaakt én junior collega’s vooruithelpt? Dan zoeken wij jou voor iO Campus Rotterdam.\nJe werkt aan uitdagende digitale producten voor opdrachtgevers zoals Husqvarna, Goudse Verzekeringen, Chupa Chups, Mentos, Feyenoord en Stichting Natuurmonumenten. Je draait mee in een multidisciplinair klantteam en draagt verantwoordelijkheid - niet alleen voor je eigen code, maar ook voor het project als geheel én voor het resultaat.\nJouw verantwoordelijkheden:\nJe bouwt high-performance webapplicaties in o.a. 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