Diagnostic Software Engineer Jobs

The Diagnostic Software Engineer sits at the technical heart of the vehicle development and aftermarket support ecosystem. Where the Diagnostic Technician in a workshop uses diagnostic software to identify vehicle faults, the Diagnostic Software Engineer creates, validates and maintains the software that makes that diagnosis possible. It is an engineering discipline that demands a thorough understanding of vehicle communication protocols, embedded systems, software validation processes and the increasingly complex electronic architectures of modern vehicles.

Automotive diagnostics software underpins every stage of the vehicle lifecycle from end-of-line testing during manufacture through to dealer-workshop fault diagnosis, over-the-air software updates and roadside assistance support. As vehicle electronics become more complex and as regulatory scrutiny of emissions, safety systems and cybersecurity increases, demand for engineers who understand diagnostic protocols and can develop, test and validate the software that drives them has grown significantly across UK-based OEMs, engineering service companies and Tier 1 component suppliers.

Venatu recruits Diagnostic Software Engineers for permanent and contract roles across automotive OEMs, Tier 1 and Tier 2 suppliers, diagnostic tool developers, automotive engineering service companies and independent software houses specialising in vehicle systems throughout the UK. This role sits within our operational support and car dealership recruitment divisions.

Who We Recruit For

We place candidates with:

• UK automotive OEMs and manufacturer engineering centres
• Tier 1 and Tier 2 automotive component and systems suppliers
• Aftermarket diagnostics tool developers and software houses
• Automotive engineering service and consultancy companies
• Vehicle calibration and test engineering businesses
• ADAS and active safety system developers requiring diagnostics integration
• Fleet and telematics technology companies with embedded vehicle diagnostic functions
• Manufacturer-aligned technical centres and homologation businesses

Roles We Place

• Diagnostic Software Engineer
• Automotive Diagnostics Developer
• Embedded Diagnostics Engineer
• OBD Software Engineer
• UDS / Diagnostics Protocol Engineer
• Diagnostic Validation Engineer
• Diagnostic Software Integration Engineer
• Senior Diagnostic Software Engineer
• Lead Diagnostic Software Engineer
• Principal Diagnostic Software Engineer

Who Can Apply

Strong Diagnostic Software Engineer candidates typically come from:

• Experienced Diagnostic Software Engineers at automotive OEMs, Tier 1 suppliers or diagnostics tool developers who want to move to a new employer, a different vehicle platform or a broader diagnostic systems scope
• Embedded software engineers from automotive or adjacent sectors including aerospace, defence or industrial electronics who have experience with communication protocols such as CAN, LIN or automotive Ethernet and want to move into vehicle diagnostics software development
• ECU software or calibration engineers at automotive businesses who have worked closely with diagnostic systems, UDS service layers or end-of-line test tooling and want to specialise in the diagnostics software function
• Vehicle software validation or test engineers who have significant experience with diagnostics-related test tooling including Vector CANalyzer, CANoe or CAPL scripting and want to move into a development or integration engineering role
• ADAS Calibration Technicians or Auto Electrician professionals with a strong interest in the software side of vehicle electronics who want to develop an engineering career path in diagnostics systems
• Graduate or junior software engineers from computer science, electronic engineering or mechatronics backgrounds who have a clear interest in the automotive sector and are looking for an entry point into vehicle diagnostics software development

Proficiency in C or C++ is expected for embedded diagnostics development roles. Knowledge of the UDS (Unified Diagnostic Services / ISO 14229) standard, OBD-II protocols, J2534 pass-through interface standards and CAN or automotive Ethernet communication is a strong advantage. Experience with Vector toolchain (CANalyzer, CANoe, CANdb++) is widely preferred. Venatu confirms the specific technical stack and platform requirements with each employer before presenting candidates.

Diagnostic Software Engineer Salary Guide

Contract day rates for experienced Diagnostic Software Engineers typically range from £450 to £700 per day depending on platform specialism, protocol depth and employer type. UK OEM and Tier 1 supplier roles at senior and principal level often include a car allowance, enhanced pension and flexible working arrangements. Venatu benchmarks total package expectations with each employer before beginning a search. Visit the HR Hub for broader context on technical and engineering role remuneration in the automotive sector.

What the Role Involves

Responsibilities vary by employer type and role seniority but typically include:

Development and Implementation:

• Designing, developing and implementing diagnostic software modules in line with vehicle diagnostic specifications, OEM requirements and relevant standards including UDS (ISO 14229), ISO 15765 and OBD-II
• Implementing diagnostic trouble code (DTC) structures, freeze frame data, readiness monitors and service routines within ECU software in line with the agreed diagnostic concept
• Developing and maintaining diagnostic communication database files (CDD, ODX, PDX) for use in test tools, end-of-line testers and aftermarket diagnostic platforms
• Integrating diagnostic function software into the wider ECU software architecture within AUTOSAR or non-AUTOSAR frameworks as applicable
• Writing CAPL scripts or Python-based test automation for diagnostic protocol validation and regression testing

Validation and Testing:

• Designing and executing diagnostic software test cases using Vector CANoe, CANalyzer or equivalent tooling to verify correct implementation against the diagnostic specification
• Conducting fault injection testing to validate DTC set conditions, permanence, ageing and clearing behaviour
• Supporting end-of-line and flashing tool validation for new vehicle programme launches
• Managing diagnostic software defects through the development issue tracking process through to resolution and re-test sign-off

Collaboration and Documentation:

• Working with systems engineers, ECU hardware and software teams and calibration engineers to integrate diagnostic requirements into the vehicle development programme
• Producing and maintaining diagnostic concept documents, network database files and test specifications
• Supporting homologation and type approval teams with OBD compliance evidence where required
• Providing technical guidance to Diagnostic Technicians and workshop technical support teams on complex diagnostic system behaviour where escalated from field

How the Process Works

For employers:

1. Submit a vacancy with the vehicle platform, software stack, diagnostic standard focus and any specific toolchain or AUTOSAR requirements.
2. We confirm candidate availability and technical background and present a pre-screened shortlist within five working days.
3. Candidates are assessed for relevant protocol knowledge, toolchain experience, software development standard and vehicle platform specialism.
4. Interview and offer supported by Venatu throughout.

For candidates:

1. Register your CV with your software development background, protocols worked with, toolchain experience, programming languages and any vehicle platforms or OEM programmes contributed to.
2. A Venatu consultant will review your background and contact you directly.
3. Roles are matched to your technical specialism, preferred employer type and geography.
4. Venatu manages the process and advises on package expectations ahead of offer.

Browse current vacancies or create a job alert to be notified when relevant roles become available.

FAQ

What does a Diagnostic Software Engineer do in the automotive sector? An automotive Diagnostic Software Engineer develops, validates and maintains the software that enables vehicles to report faults, communicate with workshop diagnostic tools and comply with OBD legislative requirements. The role covers the design of diagnostic trouble codes and service routines, the implementation of UDS and OBD communication layers within ECU software, the development of diagnostic communication database files, and the testing and validation of all diagnostic functions against the vehicle specification. It is distinct from the Diagnostic Technician role, which uses this software to diagnose vehicle faults in service.

What technical skills does a Diagnostic Software Engineer need? Core skills include embedded C or C++ development, knowledge of UDS (ISO 14229) and OBD-II diagnostic protocols, familiarity with CAN and automotive Ethernet communication architectures, and experience with Vector toolchain products (CANoe, CANalyzer, CANdb++, CANdbc). Experience with AUTOSAR diagnostic stack configuration (Dcm, Dem modules), J2534 pass-through interfaces and CAPL or Python scripting for test automation are significant advantages. Venatu confirms the specific technical requirements for each role before presenting candidates.

What is UDS and why is it important for automotive diagnostics? UDS (Unified Diagnostic Services) is defined in ISO 14229 and is the principal communication protocol used for diagnostic interactions between a vehicle ECU and an external diagnostic tool. It defines the service structure for reading fault codes, clearing diagnostic data, reading and writing ECU parameters, executing diagnostic routines, performing software downloads and controlling vehicle functions during diagnostics. Automotive Diagnostic Software Engineers are responsible for implementing UDS service handlers correctly within ECU software throughout the vehicle development lifecycle.

What does a Diagnostic Software Engineer earn in the UK? Experienced Diagnostic Software Engineers typically earn between £44,000 and £60,000. Senior engineers earn between £58,000 and £75,000. Lead and Principal Engineer roles can reach £95,000 or more. Contract day rates for experienced engineers typically range from £450 to £700. Venatu benchmarks total package expectations with each employer before beginning a search.

How is the automotive diagnostics software landscape changing? Vehicle electronic architectures are becoming significantly more complex, with domain and zonal ECU consolidation, automotive Ethernet replacing CAN as the primary communication backbone on new platforms, and cybersecurity requirements under UN Regulation 155 adding new dimensions to how diagnostic access is authenticated and controlled. Over-the-air software update capability is increasing the importance of secure, well-structured diagnostic and flash programming routines. Engineers who understand these new architectural paradigms alongside the established UDS and OBD frameworks are in strong demand. Read about broader technology shifts in the automotive sector in The Evolution Of Automobiles and regulatory pressures shaping the industry in What The Stellantis Recall Means For Recruiters.

Register or Enquire

Candidates - Register your CV with your software development background, protocols and toolchain experience, programming languages and vehicle platform or OEM programme history. Venatu will match you to current Diagnostic Software Engineer vacancies across OEMs, Tier 1 suppliers and diagnostics tool developers, including roles not publicly advertised. Browse live vacancies or create a job alert.

Employers - Submit a vacancy or visit the client hub to discuss your diagnostic software engineering requirements. Our team will respond within one working day.