HMI Developer

Pentangle Tech Services | P5 Group; United States; On-site; USD 120,000 - 180,000; Full time

Job summary

Pentangle Tech Services | P5 Group is seeking a Senior AI Application / HMI Developer to build the user-facing and assistant-intelligence components of an aftermarket In-Cab AI Assistant platform for heavy equipment. You will design and implement the in-cab UI/HMI, grounded Q&A, and voice-first workflows, integrating with machine data, diagnostics, and OTA updates.

Collaborative work with architects, embedded teams, QA, and TPM is essential to deliver production-ready software within safety

Qualifications

• Bachelor's degree in Computer Science, Software Engineering, Computer Engineering, or a related field.
• 5+ years of experience in software development, including experience building user-facing applications.
• Experience developing AI-enabled applications, preferably assistant, search, or RAG-style systems. LLM deployment and optimization/inference.
• Experience building frontend or HMI applications for device, industrial, automotive, or embedded environments.
• Experience integrating applications with backend services, APIs, or device-side data sources.
• Familiarity with prompt design, grounding strategies, response guardrails, and assistant behavior design.
• Experience with automated testing and software quality practices.
• Strong problem-solving, communication, and cross-functional collaboration skills.

Responsibilities

• Design, develop, and maintain the assistant application and HMI components for the in-cab platform.
• Implement grounded Q&A and guided workflows using approved content sources and defined guardrails.
• Build user-facing experiences for the secondary display, including visual support for voice-first interactions.
• Integrate assistant logic with machine-scoped data, diagnostics, and existing machine navigation flows.
• Support integration of voice, audio, and multimodal interaction patterns.
• Contribute to assistant quality, response behavior, error handling, and degraded/offline user experiences.
• Develop automated tests and support integration, system, and validation activities.
• Collaborate with the Architect, embedded developers, QA, and TPM to deliver working software increments and release-ready builds.

Job description

We are seeking a Senior AI Application / HMI Developer to build the user-facing and assistant-intelligence components of an aftermarket In-Cab AI Assistant platform for heavy equipment. The solution includes voice-first interaction, a secondary display, grounded Q&A, guided navigation of existing machine functions, and connected-device capabilities such as OTA updates, logging, and diagnostics. This role focuses on assistant behavior, content grounding, UI/HMI implementation, and integration of voice and visual workflows within defined safety and system boundaries.

Responsibilities

• Design, develop, and maintain the assistant application and HMI components for the in-cab platform.
• Implement grounded Q&A and guided workflows using approved content sources and defined guardrails.
• Build user-facing experiences for the secondary display, including visual support for voice-first interactions.
• Integrate assistant logic with machine-scoped data, diagnostics, and existing machine navigation flows.
• Support integration of voice, audio, and multimodal interaction patterns.
• Contribute to assistant quality, response behavior, error handling, and degraded/offline user experiences.
• Develop automated tests and support integration, system, and validation activities.
• Collaborate with the Architect, embedded developers, QA, and TPM to deliver working software increments and release-ready builds.

Required Qualifications

• Bachelor’s degree in Computer Science, Software Engineering, Computer Engineering, or a related field.
• 5+ years of experience in software development, including experience building user-facing applications.
• Experience developing AI-enabled applications, preferably assistant, search, or RAG-style systems. LLM deployment and optimization/inference.
• Experience building frontend or HMI applications for device, industrial, automotive, or embedded environments.
• Experience integrating applications with backend services, APIs, or device-side data sources.
• Familiarity with prompt design, grounding strategies, response guardrails, and assistant behavior design.
• Experience with automated testing and software quality practices.
• Strong problem-solving, communication, and cross-functional collaboration skills.

Preferred Qualifications

• Experience with voice-enabled systems, including ASR, TTS, or multimodal interaction workflows.
• Experience building applications for secondary displays, in-vehicle systems, industrial HMIs, or operator-facing products.
• Familiarity with machine, vehicle, or industrial data integration.
• Experience in heavy equipment, automotive, industrial IoT, robotics, or connected machinery.
• Experience with offline/degraded mode design and performance-sensitive edge applications.
• Familiarity with logging, diagnostics, OTA-connected products, or field-deployed systems.
• Experience working with technical documentation, service content, fault codes, or similar grounded knowledge sources.