{"id":4163874,"url":"https://alion.io/job/codonix-medior-frontend-developer","title":"Medior Frontend Developer","company":{"id":4538503,"name":"Codonix","domain":"codonix.com","url":"https://alion.io/company/codonix","size_band":null,"is_staffing_agency":false,"employer_type":"direct","is_intermediary":false,"listed_via":null,"ats_vendor":null,"truth_index":null},"role":"Frontend","role_family":"Frontend","seniority":"middle","employment_type":"full_time","work_mode":"on_site","remote_scope":null,"remote_scope_basis":null,"remote_working_hours":null,"hiring_geo_confidence":"structured","locations":["Belgrade, Serbia"],"countries":["RS"],"hiring_countries":[],"hiring_countries_total":0,"salary":null,"salary_estimate":null,"experience_years_min":null,"visa_sponsorship":false,"relocation_package":false,"has_equity":false,"technologies":[{"name":"CI/CD","optional":false},{"name":"Docker","optional":false},{"name":"JavaScript","optional":false},{"name":"Next.js","optional":false},{"name":"Node JS","optional":false},{"name":"PHP","optional":false},{"name":"React.js","optional":false},{"name":"Redux Toolkit","optional":false},{"name":"Rest API","optional":false},{"name":"Sass","optional":false},{"name":"Socket.IO","optional":false},{"name":"State Management","optional":false},{"name":"Tailwind CSS","optional":false},{"name":"TypeScript","optional":false},{"name":"Redux","optional":true}],"status":"live","first_seen_at":"2026-11-12T00:00:00Z","employer_posted_date":null,"last_verified_at":"2026-11-12T00:00:00Z","board_verified":false,"closed_at":null,"days_open":3,"trust":{"level":"not_scored","repost_count":null,"flags":[],"days_open":3},"description":"Location: On-Site\nEmployment Type: Full-Time\n\nAbout Us\nWe are a team dedicated to building innovative digital products with a strong focus on user experience. Our goal is to create high-performance systems that deliver seamless and engaging experiences to our users.\n\nWe are looking for a Mid-Level Frontend Developer to help us deliver features and maintain high-quality, scalable frontend applications.\n\nWhat Makes This Role Interesting\n\nContribute to building high-quality, production-grade frontend applications;\n\nWork alongside senior developers and technical leads;\n\nOpportunity to grow into more ownership and architecture responsibilities over time.\n\nReference: Gu6dDlAXs1wg0Q\n\nResponsibilities\n\nBuild and maintain React / Next.js applications;\n\nImplement user interfaces following modern React patterns and best practices;\n\nWork with REST APIs and real-time services;\n\nApply state management using Redux Toolkit, Context API or similar solutions;\n\nCollaborate closely with senior developers and the team to deliver features;\n\nParticipate in code reviews, testing and debugging;\n\nEnsure applications are responsive, performant and maintainable.\n\nRequirements\n\n2–4 years of experience with JavaScript, including experience with React / Next.js;\n\nFamiliarity with TypeScript;\n\nKnowledge of SSR and client-side rendering;\n\nExperience with REST APIs, JWT authentication and integrating external services;\n\nExperience with HTML5, CSS, Tailwind and SCSS;\n\nUnderstanding of mobile-first responsive development;\n\nGood problem-solving and analytical skills;\n\nTeam player with strong communication skills.\n\nNice to Have\n\nExperience with Next.js Pages Router or App Router;\n\nFamiliarity with iframe integrations;\n\nBasic knowledge of Socket.io, Node.js or PHP;\n\nExposure to Docker and CI/CD pipelines;\n\nWorking with microservice-based architectures.","description_format":"text","description_chars":1845,"description_truncated":false,"requirements":{"experience_years_min":null,"management_years_min":null,"team_size_min":null,"manages_managers":false,"education":null,"security_clearance":false,"languages":[]},"benefits":[],"hiring_locations":[],"hiring_excludes":[],"relocation_offered":false,"industries":[],"lifecycle":[{"event":"open","at":"2026-11-12T12:56:25Z"}],"visa":[],"liveness":{"score":86,"band":"hot","label":"Hiring now","p_open":1,"p_active":0.86,"p_room":1,"age_days":3,"expected_fill_days":27,"reasons":["seen:3","win:early"],"computed_at":"2026-11-15T07:52:55Z"},"pay":null,"html_url":"https://alion.io/job/codonix-medior-frontend-developer","json_url":"https://alion.io/job/codonix-medior-frontend-developer.json","meta":{"generated_at":"2026-11-15T14:45:43Z","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":6238,"day_limit":null,"remaining_today":null,"minute_limit":300,"resets_at":"2026-11-16T00:00:00Z"}},"offers":[{"id":"company.slices","title":"One company in depth, by slice","status":"live","price":{"credits":0.1,"usd":0.01,"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":4538503},"rest":"https://alion.io/mcp/rest/get_company?id=4538503"},"human":"https://alion.io/catalog?offer=company.slices&for=job%2Fcodonix-medior-frontend-developer"},{"id":"market.stats","title":"A market slice: pay, demand and time to fill","status":"free","price":{"credits":0,"usd":0},"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%2Fcodonix-medior-frontend-developer"},{"id":"job.search","title":"Open jobs by role, technology, place, pay and visa","status":"live","price":{"credits":0.1,"usd":0.01},"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%2Fcodonix-medior-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/codonix-medior-frontend-developer\", \"note\": \"what you need it for\"}"},"human":"https://alion.io/catalog?offer=company.verify&for=job%2Fcodonix-medior-frontend-developer"}],"agent":{"mcp":"https://alion.io/mcp/jobs","mcp_open":"https://alion.io/mcp/open","next":[{"tool":"get_job","arguments":{"id":4163874}},{"tool":"search_jobs","arguments":{"company":"codonix.com","detail":"compact"}},{"tool":"match_people","arguments":{"job_id":4163874},"note":"people open to offers who fit this vacancy"}],"note":"The same data through MCP tools: https://alion.io/mcp/open needs no sign-in (compact searches, postings, people); https://alion.io/mcp with an Alion account has everything. Docs: https://alion.io/developers"}}