{"id":2696949,"url":"https://alion.io/job/sage-principal-engineer-frontend","title":"Principal 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":"B","score":83,"open_postings":10,"ghost_share":0,"stale_share":0.7,"repost_share":0,"time_to_fill_p50_days":54,"computed_at":"2026-10-21T05:46:15Z"}},"role":"Frontend","role_family":"Frontend","seniority":"lead","employment_type":null,"work_mode":"hybrid","remote_scope":null,"remote_scope_basis":null,"remote_working_hours":null,"hiring_geo_confidence":"explicit","locations":["Bengaluru, India"],"countries":["IN"],"hiring_countries":[],"hiring_countries_total":0,"salary":null,"salary_estimate":null,"experience_years_min":10,"visa_sponsorship":false,"relocation_package":false,"has_equity":false,"technologies":[{"name":"AG Grid","optional":false},{"name":"Anthropic","optional":false},{"name":"AWS","optional":false},{"name":"AWS Bedrock","optional":false},{"name":"Claude Code","optional":false},{"name":"Copilot","optional":false},{"name":"Cursor","optional":false},{"name":"Emotion","optional":false},{"name":"ESLint","optional":false},{"name":"Git","optional":false},{"name":"i18next","optional":false},{"name":"JavaScript","optional":false},{"name":"Jest","optional":false},{"name":"LLM","optional":false},{"name":"Material UI","optional":false},{"name":"MSW","optional":false},{"name":"OpenAI","optional":false},{"name":"OWASP Top 10","optional":false},{"name":"Playwright","optional":false},{"name":"Prettier","optional":false},{"name":"React.js","optional":false},{"name":"Redux Toolkit","optional":false},{"name":"Rest API","optional":false},{"name":"Rollup","optional":false},{"name":"RxJS","optional":false},{"name":"State Management","optional":false},{"name":"styled-components","optional":false},{"name":"Tailwind CSS","optional":false},{"name":"TanStack Table","optional":false},{"name":"TypeScript","optional":false},{"name":"Vite","optional":false},{"name":"Vitest","optional":false},{"name":"Webpack","optional":false},{"name":"XState","optional":false},{"name":"Human-in-the-Loop","optional":true},{"name":"New Relic","optional":true},{"name":"Redux","optional":true},{"name":"Storybook","optional":true}],"status":"live","first_seen_at":"2026-10-16T10:23:04Z","employer_posted_date":"2026-10-16","last_verified_at":"2026-10-21T05:41:55Z","board_verified":true,"closed_at":null,"days_open":4,"trust":{"level":"ok","repost_count":null,"flags":[],"days_open":4},"description":"About the RoleAs a Principal Front-end Engineer at Sage, you will provide technical leadership in designing, developing, and delivering a high-quality SaaS solution that exceeds customer and business partner expectations. We are looking for someone with 10+ years of professional experience in frontend engineering, who can bring technical depth, architectural vision, and leadership maturity to the team. Proficiency in English, written and verbal, is required.\nWe value humility and collaboration. We are looking for people who can work as part of a team, not in silos. We expect engineers to take ownership beyond just writing code, including tests, documentation, and long-term code quality.\nLocation: Bangalore, India. This is a hybrid role, three days per week in the office.\nRequired Skills\nCore languages & frameworks\nStrong TypeScript (strict) and modern JavaScript (ES Modules, async).\nDeep React experience (hooks, composition, performance); React 19 / React Compiler a plus.\nSolid HTML5, CSS3, and responsive/accessible UI fundamentals.\nBuild & tooling\nModern build tooling Vite (or Webpack/Rollup); code splitting and bundle optimization.\nGit and pull-request workflows; monorepo experience (Nx) a plus.\nLinters/formatters (Biome, ESLint/Prettier) and CI discipline.\nState & data\nState management with Redux Toolkit, XState (state machines), and/or TanStack Query.\nRxJS / reactive streams.\nConsuming REST APIs; JWT/OAuth2 bearer auth on the client; robust error handling.\nStyling & design systems\nTailwind CSS, MUI (Material UI), styled-components/Emotion.\nWorking with a design-token system for brand consistency.\nData grids & performance\nComplex data grids (ag-Grid Enterprise preferred, or TanStack Table/Handsontable): virtualization, server-side row model, custom renderers/editors.\nFrontend performance profiling and optimization (rendering, memoization, main-thread work).\nWeb Workers for off-main-thread compute.\nAccessibility & i18n\nWCAG 2.1/2.2 AA accessibility practices; ARIA, keyboard, focus management.\nInternationalization (i18next or similar), including locale-aware date/number formatting.\nTesting & quality\nUnit/component testing (Vitest/Jest + Testing Library), API mocking (MSW), and Playwright E2E.\nSecure client-side coding against the OWASP Top 10 (XSS, token handling, safe storage).\nAI Tooling\nProductive use of AI-assisted developer tooling (e.g. GitHub Copilot, Claude Code, Cursor) to accelerate day-to-day frontend development.\nBuilding AI-assisted / generative-AI UX: in-app copilots, natural-language querying, or smart suggestions surfaced to the user.\nIntegrating LLM APIs on the client (e.g. OpenAI, Anthropic, AWS Bedrock) with streaming/token-by-token rendering, cancellation, and graceful error/loading states.\nNice to Have\nWeb Crypto / AES-GCM application-level encryption and client-side key management.\nLexical (or ProseMirror/Slate) rich-text/formula editors; grammar parsing (ohm-js).\nDependency-graph / DAG modeling (graphlib/graphology).\nCRDT / operational-transform real-time collaboration.\nStorybook and visual regression testing.\nNew Relic browser RUM, Pendo, and web-vitals (INP/FPS) instrumentation.\nExperience meeting enforced performance budgets and SLOs in CI.\nDomain knowledge in finance, ERP, FP&A, budgeting, or spreadsheet-like applications.\nDesigning accessible, trustworthy AI interaction patterns, such as citations, confidence indicators, and human-in-the-loop review for sensitive outputs.\nResponsibilities\nResponsibilities\nDefine and enforce frontend best practices, coding standards, and design systems.\nAct as a final reviewer for critical frontend design and implementation decisions.\nMentor engineers, provide constructive feedback, and build a strong culture of technical excellence.\nBreak down complex initiatives into milestones, estimate effectively, and deliver high-quality features with minimal oversight.\nCollaborate across Product, Backend, and Support teams to ensure smooth delivery and long-term maintainability.\nGrowth mindset: you are curious, always learning, and open to feedback.\nStrong collaboration skills: you work well with peers and cross-functional partners, and you know great ideas can come from anywhere.","description_format":"text","description_chars":4209,"description_truncated":false,"requirements":{"experience_years_min":10,"management_years_min":null,"team_size_min":null,"manages_managers":false,"education":null,"security_clearance":false,"languages":[{"language":"English","level":"Advanced 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