Senior Diagnostic Software Engineer

PACCAR•Bellevue, WA

13d•$114,500 - $179,100•Onsite

About The Position

PACCAR is seeking a Senior Diagnostic Engineer to lead the development of guided diagnostic procedures and vehicle diagnostic software for heavy-duty commercial vehicle electronics. This role supports product launch, drives continuous improvement, and collaborates across engineering, manufacturing, service, validation, IT, and suppliers to deliver reliable, user-focused diagnostic tools.

Requirements

Bachelor's degree in Electrical Engineering, Computer Science, Mechanical Engineering, or a related field
8+ years of experience with development and/or testing of onboard diagnostic software for semi trucks
Experience with CAN, SAE J1939, LIN, and object-oriented programming languages such as Python, Java, C++, C#, JavaScript/TypeScript, Ruby, or Swift.
Strong problem-solving, communication, and documentation skills.
Experience with data analysis, engineering tools, simulation, and test environments.
Ability to work in a fast-paced, results-oriented environment.
Willingness to travel up to 5% domestically or internationally.

Nice To Haves

Leadership experience mentoring others and running larger projects preferred.
Experience with Agile Scrum, continuous improvement, Lean, or Six Sigma methods preferred.
Active participation in professional organizations such as SAE, ASME, or IEEE preferred.
Experience creating simplified technical drawings and diagrams for production and service preferred.

Responsibilities

Design, document, and implement diagnostic algorithms, software, interfaces, and toolset solutions.
Provide architectural direction for diagnostic systems and toolset capabilities, ensuring scalability, maintainability, and alignment with business and technical needs.
Develop guided diagnostic procedures using a visual logic development environment and Agile methods.
Own and evolve diagnostic toolset requirements, standards, and implementation approaches in collaboration with global stakeholders.
Support manufacturing launch activities and cross-functional rollout efforts.
Lead or contribute to major projects and complex technical problem solving.
Create and review engineering specifications, requirements, architecture definitions, and technical documentation.
Mentor others, support training needs, and contribute to technical roadmaps.
Work with global teams to address worldwide requirements and local content.
Collaborate closely with globally distributed teams, including Toolset EU, the Diagnostics team NA, and Vehicle Software Delivery ITD NA, to ensure alignment, effective coordination, and successful delivery of diagnostic solutions.

Benefits

401k with up to a 5% company match
Fully funded pension plan that provides monthly benefits after retirement
Comprehensive PTO – minimum of 10 paid vacation days (additional days are provided with additional seniority/years of service), 12 paid holidays, and sick time
Tuition reimbursement for continued education
Medical, dental, and vision plans for you and your family
Flexible spending account (FSA) and health account (HSA)
Paid short- and long-term disability programs
Life and accidental death and dismemberment insurance
EAP services include wellness plans, estate planning, financial counseling and more
holiday gift