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

Sungrow Deutschland GmbH; Amsterdam; On-site; EUR 90,000 - 130,000; Full time

Job summary

Sungrow leads a strategic internal project to build a centralized web dashboard uniting LTSA-contracted ESS sites into one monitoring platform. The Lead Developer will architect data ingestion from EMS, SCADA, and ticketing systems, implement contract logic, and deliver real-time availability, KPI comparisons, and actionable insights for remote engineers and LTSA managers.

The role emphasizes scalable SPA frontend, robust backend services, and secure, compliant data handling across Europe.

Qualifications

• 5+ years full-stack web development.
• Strong experience in React/Angular/Vue; Node.js/Python/.NET/Go; REST APIs; SQL/time-series DBs.
• Integration experience: SCADA/industrial telemetry, IoT/energy platforms, ticketing (ServiceNow/Jira/Zendesk).
• Familiarity with Azure/AWS and cybersecurity best practices.
• Utility-scale BESS, PV plants, SCADA, EMS platforms knowledge.
• Ability to translate contracts into logic and maintain contract-driven KPIs.
• Structured, detail-oriented with strong ownership and cross-team coordination.

Responsibilities

• Design scalable architecture for the ESS availability dashboard.
• Define data ingestion from Customer EMS (Insight Portal), SCADA telemetry, and ticketing APIs.
• Establish normalization for LTSA formulas, site definitions, exclusions, and penalties.
• Build contract logic engine covering 17–25 year LTSAs and KPI comparisons.
• Develop a single-page dashboard with global view and drill-downs for site units.
• Integrate ticketing system for per-battery visibility and root-cause analysis.
• Ensure data compliance, RBAC, audit logs, and secure APIs.

Skills

React/Angular/Vue

Node.js

Python

.NET

Go

REST APIs

SQL/Time-series DBs

ServiceNow/Jira/Zendesk

SCADA/Industrial telemetry

Azure/AWS

RBAC/Cybersecurity

BESS/EMS platforms

Contract logic & KPIs

Tools

ServiceNow

Jira

Zendesk

SQL

Time-series DBs

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

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 (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.