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

Position: 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

Your profile
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.
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 (Service Now/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.