Lead Developer – ESS LTSA Monitoring & Availability Dashboard (Part-Time)
Department: EV Charging Development
Employment Type: Permanent employee
Schedule: Part-time
Seniority: Experienced
Location: BeNeLux - Amsterdam
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
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
- 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
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!
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.
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