sun.store Tech Stack

B2B solar components marketplace connecting European buyers and sellers

Services for Renewable Energy Warsaw, Masovian 11–50 employees Founded 2023 Public Company

Sun.store is a vertical marketplace for photovoltaic equipment, built on Python + BigQuery + LangChain with a Vue/TypeScript frontend and Laravel backend. The tech stack reveals an early-stage company layering AI/ML (LangChain, LlamaIndex, scikit-learn) onto core platform infrastructure—consistent with active projects in ML-driven pricing and logistics optimization. Hiring velocity is decelerating despite open roles, and the org is mid-heavy (6 mid-level, 1 senior) across sales, engineering, and data, suggesting the team is past initial build but not yet scaling aggressively.

Tech Stack 23 technologies

Core StackPython Pandas BigQuery LangChain scikit-learn HubSpot Google Ads Figma Vue TypeScript PHP Laravel JavaScript Docker Kubernetes SQL LlamaIndex LangGraph LinkedIn HTML/CSS Pinia Vuetify Meta

What sun.store Is Building

◆Challenges

Building in-house tech team from scratch
Pricing & logistics optimization
Data preprocessing & feature engineering
Model performance monitoring
Improving crm data quality
Streamlining cross-department workflows
Enhancing lead management processes
Scaling at lightning speed

▲Active Projects

Activation and re-activation campaigns
Ml models for pricing & logistics optimization
Advanced dashboards & visualizations
Customer-facing product understanding tools
Full ownership and development of hubspot (crm + marketing hub)
Design and deploy cross-department workflows connecting marketing, sales, and customer success
Support go-to-market (gtm) initiatives by designing automations, integrations, and reporting
Design system from scratch
Information architecture for product data
User research and usability testing

Hiring Activity

Decelerating10 roles · 3 in 30d

Department

Sales

Engineering

Finance

Marketing

Data

Design

Seniority

Mid

Junior

Senior

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About sun.store

Sun.store operates a B2B trading platform connecting solar component suppliers and buyers across Europe, launched in 2023. The business is merchant-facing (B2B marketplace model), built on a modern stack pairing data engineering (BigQuery, Pandas, SQL) with customer-engagement tooling (HubSpot, Google Ads, LinkedIn). Current projects center on ML-driven pricing and logistics optimization, cross-functional workflow automation, and design system consolidation. The company is actively building its go-to-market engine through HubSpot integrations and lead-management automation.

HeadquartersWarsaw, Masovian

Company Size11–50 employees

Founded2023

Hiring MarketsPoland

Frequently Asked Questions

What tech stack does sun.store use?

Python, Pandas, SQL, BigQuery, LangChain, LlamaIndex, and scikit-learn for data and ML. Frontend: Vue, TypeScript, Vuetify, Pinia. Backend: Laravel, PHP. Infrastructure: Docker, Kubernetes. Marketing/CRM: HubSpot, Google Ads, LinkedIn.

What is sun.store working on?

ML models for pricing and logistics optimization, HubSpot CRM and workflow automation, advanced product dashboards, a design system, and customer-facing product discovery tools to support go-to-market initiatives.