Nagarani Ravula, Developer in Hyderabad, Telangana, India
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Nagarani Ravula

Verified Expert  in Engineering

Functional Safety Developer

Hyderabad, Telangana, India
Toptal Member Since
April 11, 2023

Nagarani is a functional safety expert for the ISO26262 compliance standard with more than a decade of experience in the automotive domain. She is skilled in identifying potential safety gaps and carrying out corrective actions. She is familiar with cybersecurity for the ISO/SAE 21434 standard for cybersecurity in the automotive domain. Nagarani is a quick learner and proactive in taking up new challenges.


ISO 21434, Threat Analysis and Risk Assessment (TARA), Automotive, Cybersecurity
ZF India Pvt Ltd
DOORS, Windows, Automotive, ISO 26262
Tata Consultancy Services
DOORS, Functional Safety, Windows, Quality Assurance (QA), Automotive, ISO 26262




Preferred Environment

ISO 21434, Automotive SPICE, ISO 27001, Functional Safety, ISO 26262

The most amazing...

...thing I've done is identify potential safety gaps and recommend corrective actions for the product release, enabling engineers to deliver the product on time.

Work Experience

External Consultant, Trainer

2023 - 2023
  • Worked freelance for TUV SUD, trained engineers on the automotive cybersecurity ISO 21434 standard and topics like cryptography, secure boot, security programming, and OTA methods.
  • Obtained knowledge of UNECE R155 and UNECE R156 regulations.
  • Gained knowledge in Transmission Adequacy and Reliability Assessment (TARA), vulnerability analysis, cryptography, secure boot, and security testing methods.
Technologies: ISO 21434, Threat Analysis and Risk Assessment (TARA), Automotive, Cybersecurity

Technical Lead

2019 - 2022
ZF India Pvt Ltd
  • Worked on part six of ISO26262 and developed the failure mode and effects analysis (FMEA) software. Conducted impact analysis and safety reviews.
  • Performed safety reviews on requirements in the Dynamic Object Oriented Requirements System (DOORS) and linked the requirements.
  • Built the safety mechanism specification and implemented the traceability in the safety analysis.
Technologies: DOORS, Windows, Automotive, ISO 26262

Senior Functional Safety Engineer

2014 - 2019
Tata Consultancy Services
  • Worked as the safety assessor and performed confirmation reviews. Utilized my knowledge of the safety development lifecycle and all the safety work products like Safety Plan, HARA, FSC, TSC, and Safety Case.
  • Contributed to the templates and the instruction and checklists creation of the ISO26262:2018.
  • Performed system-level failure modes and effects analysis (FMEA) and supported peer reviews. Provided estimations to conduct FMEA.
Technologies: DOORS, Functional Safety, Windows, Quality Assurance (QA), Automotive, ISO 26262

Safety Engineer

2011 - 2014
Tech Mahindra
  • Performed HARA, software FMEA, and FTA analysis. Performed peer reviews, identified safety goals from HARA and single/dual point failures from FTA, identified hazards, and mapped to respective safety goals from FMEA.
  • Trained associates on ISO26262 standards and led the team.
  • Collaborated with the customer to understand the requirements and deliver safety work products.
Technologies: Functional Safety, DOORS, Windows, Automotive, ISO 26262

Associate Software Engineer

2010 - 2011
  • Worked with a Japanese original equipment manufacturer (OEM) on an EV charger. Provided technical documentation on the product for the certification procedures.
  • Obtained knowledge of various certification procedures and EMI/EMC requirements.
  • Developed the technical documentation for radiation limits to meet the certification requirements.
  • Acted as a functional safety expert in safety analysis and confirmation reviews. Studied the Japanese language and can speak the basics of the Japanese language.
Technologies: Microsoft Office, Microsoft Word, Microsoft Excel, Certification Authorities, Automotive

Electronic Power Steering


• Gained an understanding of the electronic power steering (EPS) features and behaviors.
• Performed and analyzed the application lifecycle management (ALM) action on impact analysis and documented the changes and conclusions on whether safety analysis is required.
• Understood the requirements to analyze the change, which helped complete the analysis.
• Grasped the ZF internal expanded polystyrene (EPS) process and the execution of safety analysis methods, including the FMEA and FTA and Intelligence Quotient for Risk Management (IQRM) tool.
• Performed peer reviews of safety analysis.
• Reviewed the safety requirements
• Handled functional safety requirements (FSC) and technical safety concept (TSC) requirements linking.

Confirmation Reviews of Safety Work Products

Executed confirmation reviews of functional safety work products as per the ISO 26262 standard.

• Gained an understanding of the ISO 26262 process and product requirements for the concept, system, software, and hardware lifecycle phases.
• Understood the product development process and ISO 26262 interpretation on the client side.
• Performed confirmation review activities on safety work products to identify potential deviations from ISO 26262 requirements. Provided recommendations to improve the overall safety case for different product lines, such as steering and braking.
• Assisted the customer's safety assessors in consolidating the potential gaps in safety cases and also finalizing the release recommendation of the product.
• Worked on product traceability and consistency.
• Coordinated with product safety managers from different product lines to resolve the identified gaps and achieve compliance for the system under consideration.

Electronic Steering Column Lock

Led the team that engineered an electronic steering column lock.

• Gained an understanding of the system block diagram and source code of the steering column lock functionality.
• Calculated the failure rate of each global variable and each routine and assigned the severity.
• Prepared the software design failure mode effect analysis (DFMEA) and system-level failure modes and effects (analysis) FMEA reports.
• Involved in preparing fault tree analysis (FTA) for electrical steering column locks (ESCL).
• Prepared the safety case report.
• Handled reviews.

EV Charger

An EV charger is an electric vehicle charging system based on the non-contact charging system (NCCS). NCCS is the fastest charging system and an inductive type of charging system.

• Involved in giving the design requirements and various certification procedures for NCCS.
• Studied electromagnetic compatibility (EMC) requirements that are useful for electromagnetic interference or EMI/EMC testing.
• Studied international standards like EN, ETSI, CENLEC, CISPR, and IEEE.
• Prepared the technical documentation for the EV charger.

Electronic Park Brake (EPB)

An electronic park brake that replaces the traditional manual park brake with an electronic switch to hold/park the vehicle on slopes. The brake supports multiple functions like anti-lock braking systems (ABS), driver attention alert (DAA), hill hold, and rear wheel unlocker (RWU).

• Prepared software DFMEA.
• Identified critical software variables, assigned with a severity ranking from 8-10.
• Identified existing protection mechanisms for the software critical variables.
• Provided recommendations to mitigate/avoid software failures.
• Constructed the software fault tree by taking hazard as the top event.
• Derived single-point and dual-point software failures leading to the hazard.
• Used the free-trade agreement (FTA) and the decomposition of automotive safety integrity level (ASIL) to the software elements, including functions and variables.
• Provided recommendations to mitigate and avoid software failures.
• Reviewed software design failure mode and effect analysis (DFMEA) and FTA.
2005 - 2009

Bachelor's of Technology Degree in Electrical Engineering

Christu Jyoti Institute of Technology & Science - Jangam, India


SOTIF Safety of Intended Functionality - Automotive ISO 21448



ISO/IEC 27001:2022. Information Security Management System



ISO 21434 Automotive Cybersecurity Standards



DOORS, Microsoft Excel, PTC Integrity Lifecycle Manager, Automotive SPICE, Microsoft Word

Industry Expertise

Automotive, Cybersecurity


Linux, Windows


C, C++


Functional Safety, Quality Assurance (QA), ISO 26262, ISO 21434, Public-key Cryptography, Secure Boot, ISO 27001, Data-level Security, Source Insight, Microsoft Office, Threat Analysis and Risk Assessment (TARA), Certification Authorities, Analysis, Safety

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