{"id":2246469,"url":"https://alion.io/job/scytalys-senior-frontend-engineer","title":"Senior Frontend Engineer","company":{"id":4382604,"name":"SCYTALYS","domain":"scytalys.com","url":"https://alion.io/company/scytalys","size_band":null,"is_staffing_agency":false,"employer_type":"direct","is_intermediary":false,"listed_via":null,"ats_vendor":"Career site","truth_index":null},"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":["Néo Psychikó, Greece"],"countries":["GR"],"hiring_countries":[],"hiring_countries_total":0,"salary":null,"salary_estimate":null,"experience_years_min":5,"visa_sponsorship":false,"relocation_package":false,"has_equity":false,"technologies":[{"name":"CI/CD","optional":false},{"name":"JavaScript","optional":false},{"name":"Jest","optional":false},{"name":"Playwright","optional":false},{"name":"React Query","optional":false},{"name":"React.js","optional":false},{"name":"Redux","optional":false},{"name":"Rest API","optional":false},{"name":"State Management","optional":false},{"name":"TypeScript","optional":false},{"name":"Zustand","optional":false}],"status":"live","first_seen_at":"2026-10-11T02:05:50Z","employer_posted_date":"2026-10-11","last_verified_at":"2026-10-12T19:08:33Z","board_verified":true,"closed_at":null,"days_open":1,"trust":{"level":"ok","repost_count":null,"flags":[],"days_open":1},"description":"EFA GROUP comprises companies in Aerospace, Security, Defense, and Industrial Cooperation with a solid international presence. EFA GROUP currently employs more than 400 people, the majority of whom are engineers and scientists. Headquartered in Greece, the Group maintains a strong international presence across Europe (Cyprus, Belgium, Switzerland, Estonia, and Germany), Asia (Singapore, Indonesia, and South Korea), the Middle East (UAE), and the United States, serving customers in 34 countries worldwide.\nThe GROUP includes EFA VENTURES (Supply Chain Management and integrated services), AEROSPACE VENTURES (Industrial Participation and related services), SCYTALYS (Systems Integration and Software), ES SYSTEMS (MEMs & IoT Integration), EPICOS (Global Defense B2B Information Platform), UCANDRONE (Unmanned Systems), AETHER AERONAUTICS (Target Drones), STHENOS AI (Intelligence Solutions), THYREOS CYBER (cyber security) , SUPERIOR AIR (aviation services and specialized aerial missions), SSMART (defense hardware - software production and services).\nSCYTALYS is a leading defense software development and systems integration company, founded in Greece in 1993. Serving customers in the Aerospace, Defense, and Security sectors, the company delivers advanced software solutions focused on interoperability, situational awareness, and mission effectiveness. Its expertise spans Tactical Data Links, Command & Control (C2/C4I) Systems, Training, Testing & Simulation, and Surveillance & Reconnaissance solutions.\nThe Role\nSCYTALYS is currently looking for a skilled Senior Frontend Engineer to design, develop, and maintain modern web applications for mission-critical systems. The successful candidate will be responsible for building scalable and high-performance user interfaces, driving front-end architecture decisions, and collaborating with cross-functional teams to deliver reliable and intuitive solutions.\nKey Responsibilities\nDesign, develop, and maintain responsive web applications using React\nBuild reusable and scalable components to support long-term maintainability\nTranslate UI/UX designs into high-quality, accessible user interfaces\nIntegrate front-end applications with RESTful APIs and back-end services\nOptimize application performance, reliability, and user experience across browsers and devices\nCollaborate with cross-functional teams to deliver robust technical solutions\nParticipate in code reviews and promote best practices, code quality, and maintainability\nDesign and evolve scalable front-end architectures, component libraries, and shared frameworks\nDefine testing strategies and contribute to automated testing standards and coverage goals\nMentor team members and contribute to the continuous improvement of engineering practices\nRequirements\n5+ years of experience in Front-End Development\nBSc degree in Computer Science, Electrical/Electronics Engineering, or a related field\nStrong expertise in React and its ecosystem\nProficiency in JavaScript (ES6+), TypeScript, HTML5, and CSS3\nExperience with state management solutions such as Redux, Zustand, or React Query\nExperience designing scalable and maintainable front-end architectures\nHands-on experience with automated testing frameworks such as Jest, React Testing Library, Cypress, or Playwright\nStrong understanding of REST APIs, asynchronous programming, and client-side integrations\nExperience with performance optimization, secure coding practices, and front-end design patterns\nFamiliarity with CI/CD workflows, code reviews, and modern development practices\nExcellent communication and collaboration skills\nFluency in English","description_format":"text","description_chars":3625,"description_truncated":false,"requirements":{"experience_years_min":5,"management_years_min":null,"team_size_min":null,"manages_managers":false,"education":{"level":"bachelor","optional":false},"security_clearance":false,"languages":[{"language":"English","level":"Advanced (C1)","optional":false}]},"benefits":[],"hiring_locations":[],"hiring_excludes":[],"relocation_offered":false,"industries":[],"lifecycle":[{"event":"open","at":"2026-10-11T02:05:50Z"}],"visa":[],"liveness":{"score":86,"band":"hot","label":"Hiring now","p_open":1,"p_active":0.86,"p_room":1,"age_days":1,"expected_fill_days":22,"reasons":["conf:4","win:early"],"computed_at":"2026-10-12T06:55:09Z"},"pay":null,"html_url":"https://alion.io/job/scytalys-senior-frontend-engineer","json_url":"https://alion.io/job/scytalys-senior-frontend-engineer.json","meta":{"generated_at":"2026-10-12T20:15:59Z","cache_seconds":300,"methodology":"https://alion.io/methodology","terms":"https://alion.io/terms","contact":"https://alion.io/contact","api":"https://alion.io/developers","about":"Alion is a live layer of people, companies and AI agents: who they are, whether they are real and active right now, what they do and how to work with them, readable by people and by agents and paid per call.","catalog":"https://alion.io/catalog.json","usage":{"tier":"crawler_verified","counted_by":"address","units_charged":1,"used_today":32864,"day_limit":null,"remaining_today":null,"minute_limit":300,"resets_at":"2026-10-13T00:00:00Z"}},"offers":[{"id":"company.slices","title":"One company in depth, by slice","status":"live","price":{"credits":0.02,"usd":0.002,"plus_per_slice":{"credits":0.05,"usd":0.005}},"unit":"per company, plus each slice with data","note":"the employer in depth","call":{"mcp_tool":"get_company","arguments":{"id":4382604},"rest":"https://alion.io/mcp/rest/get_company?id=4382604"},"human":"https://alion.io/catalog?offer=company.slices&for=job%2Fscytalys-senior-frontend-engineer"},{"id":"market.stats","title":"A market slice: pay, demand and time to fill","status":"live","price":{"credits":1,"usd":0.1},"unit":"per slice","note":"pay, demand and time to fill for this role and place","call":{"mcp_tool":"market_stats"},"human":"https://alion.io/catalog?offer=market.stats&for=job%2Fscytalys-senior-frontend-engineer"},{"id":"job.search","title":"Open jobs by role, technology, place, pay and visa","status":"live","price":{"credits":0.02,"usd":0.002},"unit":"per posting in a list","note":"similar open postings","call":{"mcp_tool":"search_jobs"},"human":"https://alion.io/catalog?offer=job.search&for=job%2Fscytalys-senior-frontend-engineer"},{"id":"company.verify","title":"Is this company real and active right now","status":"pilot","price":null,"unit":"per company","request":{"url":"https://alion.io/catalog/request","method":"POST","body":"{\"offer\": \"company.verify\", \"for\": \"job/scytalys-senior-frontend-engineer\", \"note\": \"what you need it for\"}"},"human":"https://alion.io/catalog?offer=company.verify&for=job%2Fscytalys-senior-frontend-engineer"}]}