Lead Developer – ESS LTSA Monitoring & Availability Dashboard (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)

1. MVP dashboard covering 20–30 LTSA sites
2. Deployed contract logic engine
3. Live ticketing integration
4. Operational automated availability reporting
5. Scalable architecture ready for future ESS/PV expansion

Why us?

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.