EV Charging Software Experts in OaaS & Custom Solutions

EV Charging is what we do. All we do.

We offer a full suite of solutions — including OaaS, custom software development, and strategic consulting — to help charge point operators (CPOs), fleets, and infrastructure providers take control of their networks.From tailored implementations to ongoing advisory support, we bring deep technical and operational expertise to every project.

We’re the creators of CitrineOS, the open-source CSMS backed by Linux Foundation Energy — and now, TopazEV, our commercial platform built on that foundation. Designed for flexibility and long-term ownership, TopazEV empowers operators to grow without vendor lock-in or unpredictable fees.

The Open-Source Alternative to Legacy CSMS Platforms

TopazEV offers scalable, open-source CSMS —without traditional SaaS constraints

Introducing TopazEV, S44 Energy’s Open-as-a-Service (OaaS) platform purpose-built for the next era of EV charging. Designed for charge point operators, TopazEV delivers unmatched flexibility, cost control, and independence — without vendor lock-in. Built on OCA-certified open-source foundation, TopazEV supports OCPI roaming, ISO 15118 Plug & Charge, and OCPP 1.6 to ensure full interoperability and future-ready performance.Whether you’re launching a new network or scaling an existing one, TopazEV puts you in control.

At S44 Energy, we build open, adaptable software that helps EV charging networks scale—reliably, affordably, and without vendor lock-in. Grounded in deep protocol expertise and real-world experience, our solutions remove barriers to EV adoption and put operators in full control of their infrastructure. We’re here to accelerate a cleaner, more resilient transportation future—one network at a time.

Agile Cross-Functional Teams Focused on End-User Needs

Our cross-functional teams use a comprehensive approach to product development, leveraging agile methodologies to craft solutions that prioritize end-user needs, business requirements, technical expertise, and industry knowledge. The result is impactful digital experiences that drive significant business impact.
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S44 Energy Leadership Team

Olga Haygood

Olga Haygood

CEO
Thana Paris

Thana Paris

Head of Product/Director of Open-Source
Jason Cardosi

Jason Cardosi

Head of Sales & Partnerships

Open Roles at S44 Energy

Currently, we don't have any open positions, but we're always on the lookout for talented individuals. Check back later or feel free to reach out.

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