{"id":29966,"url":"https://alion.io/job/sigma-software-middle-frontend-developer","title":"Middle Frontend Developer","company":{"id":6266,"name":"Sigma Software Group","domain":"sigma.software","url":"https://alion.io/company/sigma-software-group","size_band":"1001-5000","is_staffing_agency":false,"employer_type":"services","is_intermediary":false,"listed_via":null,"ats_vendor":"SmartRecruiters","truth_index":null},"role":"Frontend","role_family":"Frontend","seniority":"middle","employment_type":"full_time","work_mode":"remote","remote_scope":"stated_countries","remote_scope_basis":"posting_text","remote_working_hours":null,"hiring_geo_confidence":"explicit","locations":["Brasília, Brazil"],"countries":["BR"],"hiring_countries":["BR"],"hiring_countries_total":1,"salary":null,"salary_estimate":null,"experience_years_min":2,"visa_sponsorship":false,"relocation_package":false,"has_equity":false,"technologies":[{"name":"Apollo Client","optional":false},{"name":"CI/CD","optional":false},{"name":"GraphQL","optional":false},{"name":"JavaScript","optional":false},{"name":"Playwright","optional":false},{"name":"React.js","optional":false},{"name":"Redux","optional":false},{"name":"State Management","optional":false}],"status":"live","first_seen_at":"2026-03-10T17:46:47Z","employer_posted_date":"2026-03-10","last_verified_at":"2026-10-17T14:56:46Z","board_verified":true,"closed_at":null,"days_open":220,"trust":{"level":"stale","repost_count":0,"flags":["stale"],"days_open":220},"description":"Do you enjoy building sleek, high-performance web applications? We are looking for a Middle Frontend Developer to join our Front-end Development Team. This is a full-time remote opportunity based in Brasília, Federal District, Brazil, with flexibility to work from anywhere.\nAt Sigma Software, we partner with global innovators to deliver cutting-edge solutions across industries. In this role, you will work on modern web applications using React.js and GraphQL, collaborating with talented designers, backend developers, and QA engineers to create seamless user experiences.\nWhy join us? You’ll benefit from remote work flexibility, professional growth opportunities, and the chance to work on international projects with a supportive, skilled team.\nCUSTOMER\nOur customer is a technology-driven organization delivering modern web solutions to global clients. They focus on creating scalable, high-performance applications with intuitive user interfaces, leveraging cutting-edge frameworks and tools. Their teams work across diverse industries, ensuring each product meets the highest standards of usability, performance, and security.\nPROJECT\nThe project involves developing and maintaining advanced web applications using React.js and GraphQL. The goal is to deliver seamless, responsive, and user-friendly experiences for end users while ensuring scalability and performance. You will collaborate closely with backend developers, designers, and QA engineers to build robust solutions.\nDevelop and maintain web applications using React.js and GraphQL\nCollaborate with designers and backend developers to build scalable, high-performance applications\nWrite clean, maintainable, and efficient code following best practices\nImplement responsive and user-friendly UI components\nOptimize applications for performance and scalability\nDebug and troubleshoot issues across multiple browsers and devices\nParticipate in code reviews and contribute to team knowledge-sharing\n(Optional) Write and maintain end-to-end tests using Playwright\n 2+ years of experience in front-end development with React.js\nStrong understanding of JavaScript (ES6+), HTML5, and CSS3\nHands-on experience with GraphQL (Apollo Client or similar)\nFamiliarity with React Hooks, Context API, Redux (optional)\nExperience with RESTful APIs and third-party integrations\nUnderstanding of component-based architecture and state management\nKnowledge of performance optimization and debugging techniques\nUpper-Intermediate English level\nBachelor’s degree in Computer Science or related field\nWILL BE A PLUS\nExperience with Playwright or other automated testing frameworks\nFamiliarity with CI/CD pipelines and DevOps practices\n PERSONAL PROFILE\nDetail-oriented developer with a passion for creating seamless user experiences\nStrong problem-solving skills and ability to work in a collaborative environment\nProactive in identifying performance improvements and UI enhancements","description_format":"text","description_chars":2931,"description_truncated":false,"requirements":{"experience_years_min":2,"management_years_min":null,"team_size_min":null,"manages_managers":false,"education":{"level":"bachelor","optional":false},"security_clearance":false,"languages":[{"language":"English","level":"Upper-Intermediate (B2)","optional":false}]},"benefits":["Growth opportunities"],"hiring_locations":[{"name":"Brazil","iso":"BR","kind":"country"}],"hiring_excludes":[],"relocation_offered":false,"industries":["IT Outsourcing & Dedicated Teams","Custom Software Development"],"lifecycle":[{"event":"open","at":"2026-03-10T17:46:47Z"}],"visa":[],"liveness":{"score":4,"band":"cold","label":"Long shot","p_open":1,"p_active":0.141,"p_room":0.28,"age_days":220,"expected_fill_days":29,"reasons":["conf:0","velocity","win:tail","crowd:"],"computed_at":"2026-10-17T05:46:00Z"},"pay":null,"html_url":"https://alion.io/job/sigma-software-middle-frontend-developer","json_url":"https://alion.io/job/sigma-software-middle-frontend-developer.json","meta":{"generated_at":"2026-10-17T15:51:03Z","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":21455,"day_limit":null,"remaining_today":null,"minute_limit":300,"resets_at":"2026-10-18T00:00:00Z"}},"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":6266},"rest":"https://alion.io/mcp/rest/get_company?id=6266"},"human":"https://alion.io/catalog?offer=company.slices&for=job%2Fsigma-software-middle-frontend-developer"},{"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%2Fsigma-software-middle-frontend-developer"},{"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%2Fsigma-software-middle-frontend-developer"},{"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/sigma-software-middle-frontend-developer\", \"note\": \"what you need it for\"}"},"human":"https://alion.io/catalog?offer=company.verify&for=job%2Fsigma-software-middle-frontend-developer"}]}