Full-Stack Software Engineer - EV-Charging Software

About Us

S44 Energy is a dynamic EV-charging software company with a fully remote team across the U.S. and Germany. We build customer-facing and back-end applications that help CPOs, eMSPs, fleets, and OEMs elevate their charging experiences from mobile apps to intelligent back-office systems.

As the creators of CitrineOS, the industry’s leading open-source, API-first CSMS now hosted by Linux Foundation Energy, and TopazEV, our commercial platform built on open-source principles, we bring unmatched real-world experience in designing, deploying, and scaling high-performance charging networks. With deep expertise in OCPP and OCPI standards and more than a decade of delivering custom solutions for some of the world’s largest networks, we are the strategic technology partner powering the next generation of EV-charging innovation.

Who You Are

You are a Full-Stack Software Engineer who enjoys designing and developing web applications across both client engagements and our own EV-charging products, including CitrineOS and TopazEV. You’ll work closely with developers, UI/UX designers, and product owners to understand requirements, shape technical direction, and deliver high-quality features.

You care about clean, maintainable code and creating exceptional user experiences. You bring curiosity, adaptability, and a fresh perspective, and you thrive in an environment where your work has a real impact. With a startup mindset and a rapidly growing product ecosystem, S44 Energy offers opportunities to take ownership, expand your skill set, and grow your career.

What You’ll Bring

• Hands-on experience with modern frontend and backend technologies including JavaScript, TypeScript, React, Angular, Node.js, Next.js, Java, and Spring Boot
• Strong understanding of object-oriented design, design patterns, and distributed systems
• Familiarity with cloud platforms such as AWS or GCP
• Experience with SQL and NoSQL databases
• Knowledge of software architecture principles including microservices
• Solid understanding of data structures and algorithms
• Ability to write and maintain unit and integration tests
• Experience delivering high-quality software in an agile environment
• Strong problem-solving and troubleshooting skills across environments and operating systems
• Excellent communication and collaboration skills
• Three to five years of experience in a full-stack engineering role
• Familiarity with agentic AI tools such as GitHub Copilot
  
  

Bonus Skills

• Background in EV-charging software or automotive software
• Experience with Infrastructure as Code such as Terraform
• Ability to design or support event-driven architectures and big-data pipelines
• Experience working with embeddings for RAG systems
  
  

Location

East Coast preferred but open to all U.S.-based legal residents and U.S. citizens.

Please note

We are not offering visa sponsorship at this time. Candidates must be authorized to work in the United States without employer sponsorship.