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

Location: BeNeLux - Amsterdam
Employment type: Part-time

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.