S

Sunly Tech Stack

Independent renewable energy producer and portfolio investor across the Baltics and Poland

Renewable Energy Power Generation Tallinn, Estonia 201–500 employees Founded 2019 Privately Held

Sunly operates as both a direct renewable energy developer and an early-stage investor in electrification startups across Estonia, Latvia, Lithuania, and Poland. The tech stack—SCADA, Modbus, REST APIs, and real-time data processing—reflects a company managing physical assets and grid integration in parallel with software scaling. Active hiring across engineering, ops, and security roles signals rapid infrastructure build-out, while projects around asset monitoring, microservices, and security policy indicate a maturing operational complexity typical of companies moving beyond single-market development.

Tech Stack 16 technologies

Core StackJava React Vue Tailwind CSS Vite Laravel PHP Python SIEM Spring Boot SQL REST PHPUnit QGIS SCADA Modbus

What Sunly Is Building

◆Challenges

Compliance with nis2 and e-its
Coordinating security across regions
Managing security incidents
Optimising thermal system performance
Reducing total cost of ownership
Zero-margin product compliance
Electricity market adaptation
Sales onboarding friction
Improving recruitment processes
Permitting delays

▲Active Projects

Scaling renewable energy services
Real-time data processing
Event-driven microservices
Information security policy development
Monitoring assets daily in scada
Optimising thermal system performance
Electricity package end-to-end ownership
Monitoring electricity market changes
Reducing sales onboarding friction
Security integration into systems

Hiring Activity

Accelerating15 roles · 8 in 30d

Department

Engineering

7

Ops

2

Data

1

HR

1

Legal

1

Product

1

Security

1

Seniority

Mid

7

Senior

6

Lead

1

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About Sunly

Sunly was founded in 2019 by the team behind 4Energia, the Baltics' largest renewable energy company at the time of its acquisition by Enefit Green. The company operates as a dual-mandate organization: developing and operating renewable energy projects (primarily solar) across the Baltics and Poland, and managing a venture portfolio of renewable and electrification startups in Estonia. Sunly maintains local teams in each of its four operating countries and employs 201–500 people. Core operational challenges include NIS2 and e-ITS compliance, cross-regional security coordination, thermal system optimization, and adaptation to volatile electricity market dynamics.

HeadquartersTallinn, Estonia

Company Size201–500 employees

Founded2019

Hiring MarketsEstonia, Poland

Frequently Asked Questions

What tech stack does Sunly use?

Java, Spring Boot, React, Vue, Laravel, Python for application development; SCADA, Modbus for asset monitoring; SIEM for security; QGIS for geospatial analysis. Vite and Tailwind CSS support frontend tooling.

What is Sunly working on?

Scaling renewable energy services, real-time data processing, event-driven microservices, SCADA asset monitoring, security policy integration, electricity market forecasting, and sales onboarding optimization.