Lead Developer – ESS LTSA Monitoring & Availability Dashboard (Part-Time)

Job description

Your mission Sungrow Power Supply Co., Ltd. is a global leader in renewable energy power conversion systems, energy storage systems (ESS), and PV inverters. Within the ESS division, Sungrow operates multiple Long-Term Service Agreements (LTSAs) across Europe and globally, guaranteeing high availability levels for utility-scale battery storage projects. To ensure compliance with contractual availability KPIs and optimize service performance, Sungrow is developing a centralized internal monitoring dashboard integrating customer EMS data via the Sungrow Insight Portal We seek a Lead Developer to design, architect, and build a centralized web-based monitoring platform consolidating all LTSA-contracted ESS sites into one internal dashboard. The platform will: Aggregate availability data from Sungrow Insight Reflect site-specific LTSA availability guarantees Compare real-time data against contractual KPIs Integrate ticketing for full operational visibility Deliver actionable, contract-aware insights to service teams This strategic internal system supports availability compliance, LD exposure mitigation, and operational excellence. Your profile Architecture & System Design Design scalable architecture for the ESS availability dashboard Define data ingestion from: Customer EMS (via Insight Portal), SCADA telemetry, ticketing system API Establish normalization for varying LTSA formulas, site-specific definitions, exclusions, and penalty logic Availability Logic & Contract Modeling Build configurable contract logic engine supporting 17–25 year LTSAs Calculate availability per site, BESS unit, block Handle thresholds, exclusions Implement dynamic KPI comparisons (actual vs. guaranteed, rolling monthly/yearly) and early-warning alerts Dashboard & UX Development Create single-page web portal with: Global overview Drill-down: site → battery unit → inverter → DC block Real-time availability % Visual LD-risk warnings Deliver intuitive UX for remote engineers, NOC, service managers, and LTSA contract managers Ticketing System Integration Integrate ticketing API to show open/in-progress/resolved tickets per battery unit Link availability drops to active tickets Allow root-cause visibility without leaving the dashboard Data Compliance & Cybersecurity Comply with EU data protection, customer cybersecurity rules, and Sungrow policies Implement RBAC, audit logs, secure APIs, and regional/customer data segregation Reporting & Automation Automate availability reporting and monthly LTSA compliance exports Set up early-warning notifications for penalty thresholds, telemetry issues, or data instability Required Qualifications Technical 5+ years full-stack web development Strong experience in: React/Angular/Vue (SPA frontend); Node.js/Python/.NET/Go (backend); REST APIs; SQL/time-series DBs Integration experience: SCADA/industrial telemetry, IoT/energy platforms, ticketing (ServiceNow/Jira/Zendesk etc.) Familiarity with Azure/AWS, cybersecurity best practices, RBAC Utility-scale BESS, PV plants, SCADA, EMS platforms Availability calculations (technical/contractual), SLA/LTSA structures, performance guarantees, LD frameworks Strong ownership Ability to translate contracts into logic Structured, detail-oriented Coordination with ESS engineering, remote monitoring, HQ IT, contract management Deliverables (first 6–7 months) MVP dashboard covering 20–30 LTSA sites Deployed contract logic engine Live ticketing integration Operational automated availability reporting Scalable architecture ready for future ESS/PV expansion Why us? We are a green tech company with young creative minds. We are fighting every day to make our mission happen – Clean Power for All ! With 870+GW of clean power presently installed worldwide, we are on the road to success! Welcome at Sungrow Founded in 1997 by University Professor Cao Renxian, Sungrow is a leader in the research and development of solar inverters with the largest dedicated R&D team in the industry and a broad product portfolio offering PV inverter solutions and energy storage systems for utility-scale, commercial & industrial, and residential applications, as well as internationally recognized floating PV plant solutions, NEV driving solutions, EV charging solutions and renewable hydrogen production systems. Want to know more? Check out what working with us is like!