FlexGen Tech Stack

Energy storage software and systems integration for utilities and data centers

Software Development Durham, North Carolina 201–500 employees Founded 2009 Privately Held

FlexGen builds software-first energy storage systems, pairing a proprietary energy management platform (HybridOS) with flexible hardware integration. The tech stack—Python, Java, C++, React, InfluxDB, AWS—reflects a backend-heavy, data-intensive operation; the hiring mix (11 engineers, 10 sales, 4 ops) and active projects signal a company scaling go-to-market into Europe and data centers while tackling utility-scale deal complexity and operational bottlenecks.

Tech Stack 41 technologies

Core StackPython Java C++ Go JavaScript React Node.js MongoDB Power BI InfluxDB Linux Jenkins Docker AWS Pandas NumPy scikit-learn MATLAB AutoCAD LinkedIn Excel PowerPoint C Seeq VPN VLAN Git Vagrant SQL Matplotlib+11 more

AdoptingTableau

What FlexGen Is Building

◆Challenges

Closing utility-scale storage sales
Expanding into european market
Reducing costs and improving efficiency
Capturing new business opportunities in data centers
Streamlining hr processes
Optimizing supply chain processes
Improving battery storage reliability
Scaling operational processes
Expanding into data center market
Expanding market penetration

▲Active Projects

Outreach strategy development for european utilities
Go-to-market strategy for data center segment
Utility-scale storage project sales in germany
Commercial solution preparation
Early careers program
Data center energy storage integration
Risk identification and mitigation
Data visualization for battery storage performance
Integration of software applications with energy storage systems
Build pipeline to automatically create kpi reports

Hiring Activity

Steady40 roles · 10 in 30d

Department

Engineering

Sales

Ops

Data

Legal

Marketing

Executive

Seniority

Intern

Manager

Mid

Senior

Director

Notable leadership hires: Business Development Director

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About FlexGen

FlexGen delivers integrated energy storage systems for utilities and data centers, combining hardware-agnostic battery systems with software control and monitoring. Founded in 2009 and based in Durham, NC, the company operates across North America and Europe with offices in Germany and Finland. The core product is HybridOS, an energy management platform that layers on top of battery hardware to enable advanced functionality, performance monitoring, and energy trading capabilities. Customers procure systems either as software-plus-hardware bundles from FlexGen or by integrating HybridOS with their own hardware.

HeadquartersDurham, North Carolina

Company Size201–500 employees

Founded2009

Hiring MarketsUnited States, Germany, Finland

Frequently Asked Questions

What tech stack does FlexGen use?

Backend: Python, Java, C++, Go. Frontend: React, JavaScript, Node.js. Data/Analytics: InfluxDB, MongoDB, Power BI, Pandas, NumPy, scikit-learn. Infrastructure: AWS, Docker, Jenkins, Linux. Adopting Tableau.

What is FlexGen working on?

European utility outreach and utility-scale storage sales in Germany; data center energy storage integration and go-to-market strategy; software application integration with energy systems; automated KPI reporting and data visualization for battery performance.