{"id":2997993,"url":"https://alion.io/job/sage-senior-software-engineer-frontend-2","title":"Senior Software Engineer - Frontend","company":{"id":8779,"name":"Sage","domain":"sage.com","url":"https://alion.io/company/sage","size_band":"1001-5000","is_staffing_agency":false,"employer_type":"direct","is_intermediary":false,"listed_via":null,"ats_vendor":"Sage Careers","truth_index":{"grade":"A","score":85,"open_postings":12,"ghost_share":0,"stale_share":0.583,"repost_share":0,"time_to_fill_p50_days":48,"computed_at":"2026-10-25T05:49:26Z"}},"role":"Frontend","role_family":"Frontend","seniority":"senior","employment_type":null,"work_mode":"hybrid","remote_scope":null,"remote_scope_basis":null,"remote_working_hours":null,"hiring_geo_confidence":"structured","locations":["Barcelona, Spain"],"countries":["ES"],"hiring_countries":[],"hiring_countries_total":0,"salary":null,"salary_estimate":null,"experience_years_min":3,"visa_sponsorship":true,"relocation_package":false,"has_equity":true,"technologies":[{"name":"Agile","optional":false},{"name":"Figma","optional":false},{"name":"Git","optional":false},{"name":"JavaScript","optional":false},{"name":"MVVM","optional":false},{"name":"npm","optional":false},{"name":"React.js","optional":false},{"name":"Rest API","optional":false},{"name":"Sass","optional":false},{"name":"Vite","optional":false},{"name":"Webpack","optional":false},{"name":"Yarn","optional":false},{"name":"Jest","optional":true},{"name":"TypeScript","optional":true}],"status":"live","first_seen_at":"2026-09-02T00:00:00Z","employer_posted_date":"2026-10-21","last_verified_at":"2026-10-25T20:56:34Z","board_verified":true,"closed_at":null,"days_open":53,"trust":{"level":"ok","repost_count":null,"flags":[],"days_open":53},"description":"We're looking for a Senior Software Engineer with strong frontend expertise to join our Sage HCM engineering team in Barcelona.You'll work across a large-scale, modular enterprise product at an interesting inflection point: our core system is built on Sencha Ext JS (7.5+), and we are actively introducing React for new functional modules and high-performance UI components.\nThis is not a role for someone who wants to work in a single framework. You'll maintain and enhance a robust Ext JS foundation whilst building new capabilities in React, integrating the Carbon Sage Design System, and ensuring seamless interaction between the two. If you enjoy the technical challenge of working across a hybrid architecture at enterprise scale - and care deeply about code quality and user experience - this role will suit you well.\nThis is a hybrid role requiring 3 days per week in our Barcelona office.\nFirst 90 Days\n30 Days: Familiarise yourself with the Sage HCM frontend architecture: the Ext JS codebase, the React modules in development, the Carbon Design System integration, and the team's engineering practices. Meet your colleagues across frontend, backend, QA, and product. Begin contributing to active sprint work - bug fixes, small features, and code reviews - to build context quickly.\n60 Days: Take ownership of frontend delivery for your assigned areas. Contribute meaningfully to React-based feature development and Ext JS maintenance. Engage with Figma designs and work closely with backend engineers on API integration. Begin identifying opportunities to improve performance, code quality, or the hybrid integration between the two frameworks.\n90 Days: Deliver end-to-end frontend features independently, from design translation through to production. Contribute to architectural decisions around the React/Ext JS hybrid approach. Share your knowledge with the team and be an active voice on frontend best practices, Carbon implementation standards, and performance optimisation.\nMeet the Team\nYou'll join a cross-functional Sage HCM engineering team that includes frontend and backend engineers, QA, solution designers, and product owners. The team operates in an Agile environment and has a strong culture of engineering quality and collaborative delivery.\nThe dual-framework architecture reflects the reality of evolving a large, mature product: Ext JS underpins a significant portion of the system that continues to serve customers well, whilst React enables the team to build new capabilities with modern tooling and design system consistency. You'll be working at the boundary between the two - which requires both technical depth and pragmatic judgement.\nHow Success Will Be Measured\nQuality, maintainability, and performance of the frontend code you deliver across both frameworks\nConsistent and accurate implementation of the Carbon Design System in new development\nSmooth integration between React components and the existing Ext JS environment\nTimely and reliable contribution to team sprint goals and release deliverables\nPositive collaboration with backend, QA, and product colleagues\nResponsibilities\nYour work spans the full frontend stack: new feature development, maintenance, performance work, and the ongoing architectural challenge of bridging two frameworks in a way that serves both the product and the team well.\nRequired Skills and Experience\n3+ years of professional frontend development experience, with strong hands-on commercial experience in Sencha Ext JS as the primary framework.\nStrong experience with Sencha Ext JS 6.5+ / 7.5+, including Classic toolkit, component inheritance, stores, models, controllers, layouts, theming, and the MVVM/MVC lifecycle.\nWorking knowledge of React and its modern ecosystem, with the ability to contribute to React-based modules where required.\nStrong Proficiency in JavaScript (ES6+): object-oriented design, asynchronous programming, and advanced debugging.\nModern Styling & Design Systems: Experience working with Carbon (carbon.sage.com) or similar enterprise UI frameworks; deep knowledge of HTML5/CSS3/SASS.\nData Handling: Experience integrating with RESTful APIs and managing complex state/data in enterprise-scale applications.\nTooling & Workflow: Confident use of Git, package managers (NPM/Yarn), and build tools (Webpack/Vite).\nNice to Have\nExperience in TypeScript for large-scale application development.\nDeep familiarity with Ext JS theming, custom SASS/Compass theme development, and modernisation of established Ext JS codebases.\nBackground in developing ERP, HRM, or HCM systems with complex user workflows.\nKnowledge of unit testing frameworks such as Jest, React Testing Library, or equivalent frontend testing tools.\nWant to know more about our Product?: https://hcm.sage.com/\nAt Sage, we offer you an environment where you can grow professionally without compromising your personal well-being. Our benefits package is designed to provide stability, flexibility, and balance:\nMedical and dental insurance: Fully funded medical and dental insurance.\nFlexible benefits: Exchange part of your salary and make tax savings on meal and transport vouchers, childcare, and training.\nWell-being: Free access to the Calm app (for up to 5 users), 24/7 counselling, and emotional support from our Healthy Mind Coaches. We also offer self-care and parenting resources through the Cleo app.\nFlexible working: flexibility of working one hour in, one hour out, shortened workdays on Fridays and during the summer, and the opportunity to work from over 40 countries for up to 10 weeks per year through our Work Away program.\nAnnual leave: 23 working days of vacation, 5 paid days per year for volunteering.\nExtended leave: 7 extra days of maternity leave and 5 extra days of paternity leave, on top of the legal allowance, available after one year of service.\nFinancial support: Life and disability insurance, salary advances of up to 3.5 times your net monthly pay, a €300 net marriage bonus, and access to Sage's employee stock purchase plan at a discounted rate.\nLearning and development: Free premium subscription to external learning platforms\nHealth and Safety Responsibilities\nFostering the safety culture, by leading with your own example.\nFollowing established safety procedures and reporting potential hazards promptly helps maintain a secure and efficient workplace.\nParticipating in safety training sessions and adhering to preventive guidelines and procedures, the objective is minimizing risks and protecting yourself and the rest of your colleagues.\nThis role is not open to visa sponsorship. Candidates must have a valid work authorization for the location listed and not require sponsorship now, or in the future, for their application to be considered.","description_format":"text","description_chars":6749,"description_truncated":false,"requirements":{"experience_years_min":3,"management_years_min":null,"team_size_min":null,"manages_managers":false,"education":null,"security_clearance":false,"languages":[]},"benefits":["Annual leave","Dental insurance","Flexible schedule"],"hiring_locations":[{"name":"Spain","iso":"ES","kind":"country"}],"hiring_excludes":[],"relocation_offered":false,"industries":["ERP & Business Management Software","HR & Payroll Software","Accounting & Tax Software"],"lifecycle":[{"event":"open","at":"2026-10-21T11:20:23Z"}],"visa":[],"liveness":{"score":25,"band":"fade","label":"Fading","p_open":1,"p_active":0.561,"p_room":0.44,"age_days":53,"expected_fill_days":48,"reasons":["conf:0","stale_co","velocity","win:tail","crowd:brand"],"computed_at":"2026-10-25T05:49:26Z"},"pay":null,"html_url":"https://alion.io/job/sage-senior-software-engineer-frontend-2","json_url":"https://alion.io/job/sage-senior-software-engineer-frontend-2.json","meta":{"generated_at":"2026-10-25T21:14:03Z","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":30032,"day_limit":null,"remaining_today":null,"minute_limit":300,"resets_at":"2026-10-26T00:00:00Z"}},"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":8779},"rest":"https://alion.io/mcp/rest/get_company?id=8779"},"human":"https://alion.io/catalog?offer=company.slices&for=job%2Fsage-senior-software-engineer-frontend-2"},{"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%2Fsage-senior-software-engineer-frontend-2"},{"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%2Fsage-senior-software-engineer-frontend-2"},{"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/sage-senior-software-engineer-frontend-2\", \"note\": \"what you need it for\"}"},"human":"https://alion.io/catalog?offer=company.verify&for=job%2Fsage-senior-software-engineer-frontend-2"}]}