{"id":3749907,"url":"https://alion.io/job/codilime-senior-frontend-engineer-react","title":"Senior Frontend Engineer (React)","company":{"id":1985033,"name":"CodiLime","domain":"codilime.com","url":"https://alion.io/company/codilime","size_band":"201-500","is_staffing_agency":false,"employer_type":"staffing","is_intermediary":false,"listed_via":null,"ats_vendor":"Teamtailor","truth_index":{"grade":"B","score":75,"open_postings":6,"ghost_share":0,"stale_share":1,"repost_share":0,"time_to_fill_p50_days":24,"computed_at":"2026-11-06T05:58:05Z"}},"role":"Frontend","role_family":"Frontend","seniority":"senior","employment_type":"full_time","work_mode":"remote","remote_scope":"stated_countries","remote_scope_basis":"board_field","remote_working_hours":null,"hiring_geo_confidence":"structured","locations":["Brasília, Brazil"],"countries":["BR"],"hiring_countries":["BR"],"hiring_countries_total":1,"salary":null,"salary_estimate":null,"experience_years_min":7,"visa_sponsorship":false,"relocation_package":false,"has_equity":false,"technologies":[{"name":"Anthropic","optional":false},{"name":"AWS","optional":false},{"name":"CI/CD","optional":false},{"name":"Claude Code","optional":false},{"name":"Docker","optional":false},{"name":"Docker Compose","optional":false},{"name":"GitHub Actions","optional":false},{"name":"Grafana","optional":false},{"name":"JavaScript","optional":false},{"name":"Jest","optional":false},{"name":"Kubernetes","optional":false},{"name":"Model Context Protocol","optional":false},{"name":"npm","optional":false},{"name":"OpenTelemetry","optional":false},{"name":"Playwright","optional":false},{"name":"PostgreSQL","optional":false},{"name":"Prometheus","optional":false},{"name":"React.js","optional":false},{"name":"Recharts","optional":false},{"name":"TypeScript","optional":false},{"name":"Vite","optional":false},{"name":"Zustand","optional":false},{"name":"Auth0","optional":true},{"name":"gRPC","optional":true},{"name":"Rest API","optional":true}],"status":"live","first_seen_at":"2026-11-04T13:37:35Z","employer_posted_date":"2026-11-04","last_verified_at":"2026-11-06T19:08:25Z","board_verified":true,"closed_at":null,"days_open":2,"trust":{"level":"ok","repost_count":null,"flags":[],"days_open":2},"description":"Get to know us better\nCodiLime is a software and network engineering industry expert and the first-choice service partner for top global networking hardware providers, software providers and telecoms. We create proofs-of-concept, help our clients build new products, nurture existing ones and provide services in production environments. Our clients include both tech startups and big players in various industries and geographic locations (US, Japan, Israel, Europe).\nWhile no longer a startup - we have 250+ people on board and have been operating since 2011 we’ve kept our people-oriented culture. Our values are simple:\nAct to deliver.\n\nDisrupt to grow.\n\nTeam up to win.\n\nThe project and the team\nYou will join the team behind a leading network source-of-truth (NSoT) platform, used by thousands of organizations - from fast-growing tech companies to Fortune 500 enterprises - to model, document, and automate their network infrastructure.\nCodiLime engineers work within the platform's Observability team, which connects the network source of truth with what is actually running on the network. The team builds products for network discovery, network assurance (detecting drift between the intended and the actual state of the network), management of the agents that collect discovery and telemetry data, and a reliable pipeline that ingests this data into the platform.\nThe platform is built AI-first, with its own Claude Code agent skills and MCP server, and that mindset carries over to how the team works: Claude Code is used heavily day to day to help the team move fast and consistently deliver high-quality results.\nIn this role, you will build the real-time monitoring and telemetry dashboards at the heart of the observability products - interfaces that help network operators make sense of large, constantly changing network data. The scale is significant: some of the platform's largest customers manage hundreds of thousands of devices across globally distributed environments.\nAs the observability offering keeps growing, the team is looking for a Senior Frontend Engineer who enjoys React, thinks in terms of data visualization and works AI-first.\nTechnology stack:\nProgramming languages/Frontend: TypeScript, JavaScript, React\n\nBuild tooling: Vite, npm\n\nState management & data fetching: Zustand, TanStack Query, Context API\n\nStyling: TailwindCSS\n\nTesting: Jest, React Testing Library (unit tests), Playwright (E2E)\n\nAPIs: REST with OpenAPI contracts, gRPC\n\nData visualization: charting libraries for real-time telemetry dashboards (e.g. Recharts, D3)\n\nCI/CD: GitHub Actions\n\nAI tooling: Claude Code, MCP servers, Anthropic tooling\n\nSecurity: OAuth2 / OIDC\n\nObservability: OpenTelemetry, metrics and instrumentation, Grafana, Prometheus\n\nContainerization & Orchestration: Docker (Docker Compose for local/test environments), Kubernetes\n\nCloud: AWS\n\nWhat else you should know:\nSmall, cross-functional team with strong ownership of code quality, security and tests\n\nThe team is distributed across Europe and the US, and we are looking for someone whose working hours can overlap with the US East Coast\n\nAI tools are part of the daily workflow - Claude Code is used heavily across the team\n\nThis is a frontend-focused role, working closely with backend engineers on API contracts\n\nStartup-like vibe: proactive, ownership-driven, fast-paced\n\nWe work on multiple interesting projects at a time, so it may happen that we’ll invite you to an interview for another project if we see that your competencies and profile are well suited for it.\nYour role\nAs a part of the project team, you will be responsible for:\nBuilding real-time monitoring and telemetry dashboards for the platform's observability products\n\nDesigning and developing React and TypeScript interfaces for network discovery, network assurance and agent fleet management\n\nTurning large, frequently changing network and telemetry data into clear and usable visualizations\n\nDefining and consuming frontend-backend contracts (OpenAPI) together with backend engineers\n\nManaging client state and server data efficiently (Zustand, TanStack Query, Context API)\n\nWriting unit tests (Jest, React Testing Library) and E2E tests (Playwright) running in CI (GitHub Actions)\n\nMaking sure the product is accessible to all users\n\nUsing Claude Code day to day: setting constraints, reviewing the output and staying accountable for correctness, security and tests\n\nWriting clean, maintainable, well-tested code and participating in code reviews\n\nDo we have a match?\nAs a Senior Frontend Engineer, you must meet the following criteria:\n7+ years of professional frontend development experience\n\nStrong experience with React, TypeScript and JavaScript\n\nExperience with Vite\n\nExperience with Zustand (or another state management library) and the Context API\n\nExperience with TanStack Query\n\nExperience with TailwindCSS\n\nGood understanding of frontend-backend contracts, ideally defined with OpenAPI\n\nExperience with unit testing (Jest, React Testing Library)\n\nExperience with E2E testing, ideally with Playwright\n\nExperience with npm\n\nCI/CD experience (ideally GitHub Actions)\n\nExperience with PostgreSQL\n\nExperience with Docker and Docker Compose (local and test environments)\n\nUnderstanding of accessibility, ideally hands-on experience\n\nHands-on, everyday use of AI coding tools (ideally Claude Code)\n\nExperience building SaaS and infrastructure products\n\nNetworking knowledge gained from working on observability or monitoring products\n\nWorking hours overlapping with the US East Coast\n\nGood knowledge of English (minimum C1 level)\n\nBeyond the criteria above, we would appreciate the following nice-to-haves:\nExperience with data visualization libraries such as Recharts or D3\n\nExperience with observability tools such as Grafana\n\nExperience with OAuth2 / OIDC (e.g. Auth0)\n\nExperience with RBAC (role-based access control)\n\nMore reasons to join us\nFlexible working hours and approach to work: fully remotely, in the office or hybrid\n\nProfessional growth supported by internal training sessions and a training budget\n\nSolid onboarding with a hands-on approach to give you an easy start\n\nA great atmosphere among professionals who are passionate about their work\n\nThe ability to change the project you work on","description_format":"text","description_chars":6266,"description_truncated":false,"requirements":{"experience_years_min":7,"management_years_min":null,"team_size_min":null,"manages_managers":false,"education":null,"security_clearance":false,"languages":[{"language":"English","level":"Advanced (C1)","optional":false}]},"benefits":["Flexible 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