Sr. SW Engineer - CSMS​/OCPP SME; Bentonville, AR

Background:
This is a long-term consulting role lasting 12-24+ months, with potential to convert to full-time employment. The candidate will serve as the SME (Subject Matter Expert) for the EV team's CSMS development. The role involves hiring and training two junior to mid-level team members.

Terms:

CSMS: "Charging Station Management Systems"

OCPP: "Open Charge Point Protocol"

Interviews: 2 Rounds (possible 3rd)

Location:
Must sit in or relocate to Bentonville, AR (hybrid work model) from day 1

Must Have Skills:

• Senior-level experience (10+ years) with Java, Python, or Golang frameworks
• 3+ years of experience in designing and developing CSMS platforms for EV charging stations
• Experience supporting CSMS frameworks with OCPP 1.6J or 2.0.1
• Understanding of EV vehicle and charger station protocols and guidelines

Highly Desired:

• OCPP certifications

Job Description:

We seek a strong candidate based in the US to work hands-on as an individual contributor, guiding developers in CSMS development.

What You'll Do:

• Collaborate with Walmart engineering teams globally to leverage expertise and contribute to CSMS development
• Engage with product and architecture teams to share core capabilities and contribute to the CSMS roadmap
• Build, test, deploy CSMS solutions at scale, supporting Walmart's EV strategy
• Mentor team members to follow best practices for quality and rapid delivery
• Focus on reusability, frameworks, patterns, and configuration tools for faster development cycles
• Proactively resolve technical challenges
• Diagnose issues between CSMS systems and EV charger hardware

What You'll Bring:

• 10+ years in designing and developing highly scalable applications
• 3+ years in developing CSMS platforms for EV charging stations
• Deep understanding of EV protocols, guidelines, and standards
• Strong hands-on skills in prototyping technical solutions
• Experience with CSMS frameworks supporting OCPP 1.6J or 2.0.1
• Experience with smart charging, auto-charge, ISO 15118, V2G/V2X charging
• OCPP certification experience
• Knowledge of EV system performance benchmarks, AC/DC charging systems
• Understanding of hardware, control, and software aspects of EV charging
• Ability to conduct root cause analysis and propose cost-effective solutions
• Experience with open-source CSMS frameworks

Mandatory Technical Skills:

• Java, Python, or Golang frameworks
• Experience with CSMS systems
• Experience implementing OCPP modules for versions 1.6J or 2.0.1

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