{"id":743685,"url":"https://alion.io/job/fogsphere-react-js-developer","title":"React.js Developer","company":{"id":673815,"name":"Fogsphere","domain":"fogsphere.com","url":"https://alion.io/company/fogsphere","size_band":"51-200","is_staffing_agency":false,"employer_type":"direct","is_intermediary":false,"listed_via":null,"ats_vendor":"Rippling","truth_index":{"grade":"B","score":75,"open_postings":8,"ghost_share":0,"stale_share":1,"repost_share":0,"time_to_fill_p50_days":null,"computed_at":"2026-11-02T06:13:15Z"}},"role":"Frontend","role_family":"Frontend","seniority":null,"employment_type":"full_time","work_mode":"on_site","remote_scope":null,"remote_scope_basis":null,"remote_working_hours":null,"hiring_geo_confidence":"structured","locations":["London, United Kingdom"],"countries":["GB"],"hiring_countries":[],"hiring_countries_total":0,"salary":null,"salary_estimate":{"min_usd":59000,"max_usd":155000,"period":"year","method":"role_country_seniority_unknown","sample_n":29},"experience_years_min":null,"visa_sponsorship":false,"relocation_package":false,"has_equity":false,"technologies":[{"name":"Computer Vision","optional":false},{"name":"GDPR","optional":false},{"name":"JavaScript","optional":false},{"name":"Kubernetes","optional":false},{"name":"React.js","optional":false},{"name":"Redux","optional":false},{"name":"Webpack","optional":false},{"name":"Babel","optional":true},{"name":"CI/CD","optional":true},{"name":"Git","optional":true},{"name":"Jest","optional":true},{"name":"Mocha","optional":true},{"name":"npm","optional":true},{"name":"Rest API","optional":true},{"name":"TypeScript","optional":true}],"status":"live","first_seen_at":"2025-10-17T12:11:44Z","employer_posted_date":"2025-10-17","last_verified_at":"2026-11-02T23:14:40Z","board_verified":true,"closed_at":null,"days_open":381,"trust":{"level":"stale","repost_count":0,"flags":["stale"],"days_open":380},"description":"About Fogsphere\nFogsphere is a London-based innovator focused on transforming workplace and urban safety through advanced AI, Computer Vision, and Industrial IoT. Built on a principled “Edge-to-Fog-to-Cloud” architecture, our platform turns passive CCTV cameras and sensors into proactive hazard detectors, capable of identifying threats like missing PPE, fire, smoke, restricted access violations, and more-in real time and at scale. This helps organizations across industries-from manufacturing, construction, oil & gas, and healthcare to smart cities-reduce workplace accidents by up to 90%, ensure regulatory compliance (EHS), and gain powerful operational insights. Fogsphere’s intuitive no-code visual workflows, hyper-scalable Kubernetes-based infrastructure, and commitment to ethical AI and privacy (GDPR compliance) make it a user-friendly yet enterprise-grade solution.\n About the Role\nWe are seeking a skilled React.js Developer to join our front-end development team. In this role, you will be responsible for developing and implementing user interface components using React.js concepts and workflows such as Redux, Flux, and Webpack. You will also be responsible for profiling and improving front-end performance and documenting our front-end codebase.\nKey Responsibilities\n- Develop new user-facing features using React.js\n- Build reusable components and front-end libraries for future use\n- Translate designs and wireframes into high-quality code\n- Optimize components for maximum performance across a vast array of web-capable devices and browsers\n- Collaborate with back-end developers and web designers to improve usability\n- Write application interface codes using JavaScript following React.js workflows\n- Troubleshoot interface software and debug application codes\n- Ensure the technical feasibility of UI/UX designs\n- Stay up-to-date with emerging technologies and industry trends\nQualifications\n- Proficiency in JavaScript, including DOM manipulation and the JavaScript object model\n- Thorough understanding of React.js and its core principles\n- Experience with popular React.js workflows (such as Redux or Flux)\n- Familiarity with newer specifications of ECMAScript\n- Experience with data structure libraries (e.g., Immutable.js)\n- Knowledge of isomorphic React is a plus\n- Familiarity with RESTful APIs\n- Knowledge of modern authorization mechanisms, such as JSON Web Tokens\n- Familiarity with modern front-end build pipelines and tools\n- Experience with common front-end development tools such as Babel, Webpack, NPM, etc.\n- Ability to understand business requirements and translate them into technical requirements\n- A knack for benchmarking and optimization\n- Familiarity with code versioning tools such as Git\nPreferred Skills\n- Experience with TypeScript\n- Familiarity with server-side rendering\n- Knowledge of testing frameworks such as Jest or Mocha\n- Experience with continuous integration/continuous deployment (CI/CD) pipelines\nWhat We Offer\n- ZERO micromanagement. 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