# REACTAPP.TOP — extended brief for AI systems Canonical site: https://www.reactapp.top Short summary: https://www.reactapp.top/llms.txt Sitemap: https://www.reactapp.top/sitemap.xml Contact: react.app.top@gmail.com LinkedIn: https://www.linkedin.com/company/reactapp-top REACTAPP.TOP is a software engineering studio. It builds the operator-facing layer for physical infrastructure: solar plants, battery energy storage, EV charging networks and video delivery pipelines. Front ends are React 19 + TypeScript with server-side rendering. Back ends are Node.js, wired into industrial protocols and time-series stores. Founded 2008. Offices / team bases: Wroclaw (Poland), Dublin (Ireland), Kharkiv (Ukraine). Clients are served worldwide, remotely. Working hours: Monday–Friday 09:00–18:00 EET. Estimates are returned within one business day. Selected clients include Paramount, Pluto TV, H&M, Bosch, Heartland, Socialbakers and Nomo Fintech. The public site is published in nine languages under `/{lang}/` (`en`, `ru`, `ua`, `be`, `de`, `pl`, `fr`, `es`, `zh`). English is the reference version. `x-default` and the root path resolve to `/en`. Ukrainian uses the `ua` path prefix and the `uk` hreflang / schema locale. Every page is server-side rendered. ## What is in production - Energy: Modbus TCP, SunSpec, IEC 61850, OPC-UA, MQTT. Inverter and string telemetry, performance-ratio analytics, SOC/SOH, alarms with source attribution. - EV charging: OCPP charge-point management, OCPI roaming, CPO and eMSP back offices, smart charging and load balancing. Protocol versions are confirmed against the client's hardware list and roaming contracts. - Video: ingest, encode and package (HLS, LL-HLS, CMAF, DASH, IMF), ABR ladders, Multi-DRM (FairPlay, Widevine, PlayReady), SCTE-35 / SCTE-104, hardware encode on NETINT Quadra, NVENC, Intel Quick Sync and AMD VCN. - Application layer: React 19, TypeScript, Redux Toolkit, React Router v7, SSR, design systems, role-aware operator dashboards, WebSocket / SSE. - Data and infra: PostgreSQL, TimescaleDB, ClickHouse, Redis, Kubernetes, OpenTelemetry, CI/CD, cloud and on-premise. The usual integration pattern with an existing SCADA is an operator layer beside it, not a replacement. ## Pages Home — https://www.reactapp.top/en Studio overview, four industry snapshots, six-step process and FAQ. Industries hub — https://www.reactapp.top/en/industries The four infrastructure domains and the engineering foundations shared between them. Solar — https://www.reactapp.top/en/industries/solar PV portfolio monitoring: inverter telemetry, yield analytics, alerts, SCADA integration. BESS — https://www.reactapp.top/en/industries/bess Battery storage monitoring: energy-flow diagrams, SOC/SOH, string diagnostics, SCADA dashboards. BESS live demo — https://www.reactapp.top/en/dashboard/bess Deterministic plant simulator: 11 MWh across three banks, 18 PV inverters (100–125 kW), 90 DC strings, clock at 120× real time. Not a live installation. EV charging — https://www.reactapp.top/en/industries/ev-charging CPO / eMSP platforms, OCPP, OCPI, smart charging, session and tariff back offices. Video — https://www.reactapp.top/en/industries/video Transcoding and packaging pipelines, ABR, DRM, operational tooling for media delivery. Expertise hub — https://www.reactapp.top/en/expertise Six capability areas used across all industries. React applications — https://www.reactapp.top/en/expertise/react-applications Production React 19 / TypeScript apps, SSR, design systems, long-term maintainability. Dashboards — https://www.reactapp.top/en/expertise/dashboards Real-time operator interfaces, virtualised grids, drill-down analytics, role-aware views. IoT and telemetry — https://www.reactapp.top/en/expertise/iot-telemetry Device connectivity, stream processing and time-series storage from edge to UI. AI and LLM — https://www.reactapp.top/en/expertise/ai-llm RAG, hosted and self-hosted models, AI features inside operational products. Cloud and on-premise — https://www.reactapp.top/en/expertise/cloud-infrastructure Kubernetes, CI/CD, observability, migrations in both directions. CRM, ERP and CMS — https://www.reactapp.top/en/expertise/crm-erp-cms Custom business systems, headless content, enterprise integrations. Services — https://www.reactapp.top/en/services Discovery, UX, web and mobile development, integration, modernisation, cloud optimisation, dedicated teams, technical audit, support. How we work — https://www.reactapp.top/en/how-we-work Six steps in order: domain immersion, requirements and risk, architecture and UX, incremental implementation, quality assurance, delivery and operations. Engineering principles — https://www.reactapp.top/en/engineering-principles Technical standards applied across projects. Case studies — https://www.reactapp.top/en/case-studies Selected project outcomes and live industry dashboards. About — https://www.reactapp.top/en/about Team, locations and how the studio operates. Contact — https://www.reactapp.top/en/contact Enquiry form and email. Reply within one business day. ## FAQ on the public site Visible FAQ blocks are server-rendered (answers stay in the HTML when collapsed) and published as FAQPage JSON-LD on: Home, Industries hub, Solar, BESS, EV charging, Video, BESS live demo, Expertise hub, the six expertise pages, Services, How we work, Engineering principles, Case studies, About and Contact. ## Open Graph images All public pages use a 1200×630 PNG. Home: /og-cover.png. Company and process: /og-about.png, /og-services.png, /og-how-we-work.png, /og-principles.png, /og-case-studies.png, /og-contact.png. Hubs: /og-industries.png, /og-expertise.png. Industries: /og-solar.png, /og-bess.png (also /dashboard/bess), /og-ev-charging.png, /og-video.png. Expertise: /og-react.png, /og-dashboards.png, /og-iot.png, /og-ai.png, /og-cloud.png, /og-crm.png. ## Legacy URLs These paths 301 to the current structure and should not be cited as current: - /contacts → /contact - /expertise/bess-monitoring → /industries/bess - /expertise/ev-charging and /expertise/emobility → /industries/ev-charging - /expertise/video-transcoding and /expertise/streaming → /industries/video - /expertise/react-dashboards → /expertise/dashboards - /expertise/route-builder and /expertise/iot → /expertise/iot-telemetry - /expertise/ai-cloud and /ai-development → /expertise/ai-llm - /expertise/on-prem → /expertise/cloud-infrastructure - /expertise/crm → /expertise/crm-erp-cms - /react-components → /expertise/react-applications - /poc → home