{"id":2329724,"url":"https://alion.io/job/link-group-full-stack-engineer-2","title":"Full-Stack Engineer","company":{"id":880,"name":"Link Group","domain":"linkgroup.co","url":"https://alion.io/company/link-group","size_band":"1001-5000","is_staffing_agency":false,"employer_type":"staffing","is_intermediary":false,"listed_via":null,"ats_vendor":"Recruitify","truth_index":{"grade":"A","score":86,"open_postings":124,"ghost_share":0,"stale_share":0.573,"repost_share":0,"time_to_fill_p50_days":45,"computed_at":"2026-10-12T06:55:09Z"}},"role":"Backend","role_family":"Backend","seniority":"senior","employment_type":null,"work_mode":"remote","remote_scope":"stated_countries","remote_scope_basis":"board_field","remote_working_hours":null,"hiring_geo_confidence":"structured","locations":["Poland"],"countries":["PL"],"hiring_countries":["PL"],"hiring_countries_total":1,"salary":{"min":110,"max":130,"currency":"PLN","period":"hour","gross":null,"usd_annual":66000},"salary_estimate":null,"experience_years_min":null,"visa_sponsorship":false,"relocation_package":false,"has_equity":false,"technologies":[{"name":"Fastify","optional":false},{"name":"Node JS","optional":false},{"name":"Playwright","optional":false},{"name":"PostgreSQL","optional":false},{"name":"React Router","optional":false},{"name":"React.js","optional":false},{"name":"Redis","optional":false},{"name":"TypeScript","optional":false},{"name":"Vitest","optional":false},{"name":"Agile","optional":true},{"name":"JavaScript","optional":true}],"status":"live","first_seen_at":"2026-06-19T12:12:13Z","employer_posted_date":"2026-06-19","last_verified_at":"2026-10-12T19:47:21Z","board_verified":true,"closed_at":null,"days_open":115,"trust":{"level":"ok","repost_count":null,"flags":[],"days_open":115},"description":"Senior Fullstack Engineer (React & Node.js)\nAbout the Role\nWe are looking for a Senior Fullstack Engineer to join a product team building modern, scalable web applications and digital experiences.\nYou will work across the entire application stack, from user-facing interfaces to backend services and integrations. The role has a strong focus on frontend engineering while also involving backend development, API design, and data management.\nYou will collaborate closely with product, design, and engineering teams to deliver high-quality, accessible, and performant applications.\nResponsibilities\nDevelop and maintain modern web applications using React, Node.js, and TypeScript.\nBuild scalable and reusable UI components integrated with a design system.\nDevelop and maintain backend services and APIs using Node.js and Fastify.\nIntegrate applications with CMS platforms and third-party services.\nWork with PostgreSQL and Redis to support application functionality and performance.\nWrite and maintain automated tests, including unit and end-to-end tests.\nEnsure high standards of accessibility, performance, and code quality.\nParticipate in architectural discussions and contribute to engineering best practices.\nRequirements\nStrong commercial experience in fullstack development using React and Node.js.\nSolid experience with modern frontend technologies, including React Router and TanStack Query.\nExperience integrating with Headless CMS platforms, preferably Contentful.\nGood understanding of API design and backend development principles.\nExperience with PostgreSQL and Redis.\nExperience with automated testing frameworks such as Vitest and Playwright.\nStrong understanding of accessibility standards (WCAG) and performance optimisation.\nAbility to work across the entire software development lifecycle in a product-oriented environment.\nNice to Have\nExperience with authentication and identity platforms such as SAP Gigya.\nExperience integrating Salesforce products or loyalty platforms.\nExperience in highly scalable, customer-facing digital products.\nExperience working in agile, cross-functional product 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