NI interviews are moderately difficult, with a strong emphasis on C/C++ coding, embedded systems design, and behavioral alignment with NI's engineering values. Allocate 2-3 months for preparation: solve 150+ LeetCode problems (focus on medium/hard), study real-time system design, and practice explaining your thought process clearly. Review NI's product domains like LabVIEW to demonstrate relevant interest.

Prioritize data structures, algorithms, and object-oriented programming in C/C++. Also, study embedded systems concepts, real-time operating systems, and basics of NI's tools like LabVIEW or TestStand. Focus on memory management, concurrency, and system design for test/measurement applications to align with NI's engineering focus.

Common errors include not verbalizing problem-solving steps during coding, lacking knowledge in NI's core domains like data acquisition, and giving vague behavioral answers. Avoid these by practicing whiteboard coding aloud, researching NI's products beforehand, and using the STAR method with concrete examples from your projects.

Candidates with hands-on experience in NI hardware/software (e.g., LabVIEW, DAQ systems), strong problem-solving in engineering contexts, and demonstrated collaboration stand out. Highlight projects involving real-time systems or test instrumentation, and show enthusiasm for NI's mission in engineering innovation during behavioral rounds.

After applying, expect an initial phone screen within 1-2 weeks. Technical rounds (coding, design) may take 2-4 weeks, followed by a behavioral or team match round. Final decisions often come in 1-2 weeks after interviews. Overall, the process usually spans 4-8 weeks, but follow up after 10 days if you haven't heard back.

SDE-1 interviews focus on core coding and algorithms; SDE-2 adds system design and project leadership; SDE-3 emphasizes architectural design, mentorship, and strategic impact. Higher levels require deeper expertise in embedded/real-time systems and proven experience in similar engineering environments, with more behavioral questions on leadership.

Use LeetCode for C/C++ coding practice, targeting medium and hard problems. Study embedded systems through books like 'Making Embedded Systems' and review NI's official documentation for LabVIEW. Practice behavioral questions using NI's leadership principles from their careers page, and consider mock interviews focused on system design for test systems.

NI promotes a collaborative, innovation-driven culture with an emphasis on engineering excellence and quality. SDEs are expected to contribute to product development in test/measurement, work cross-functionally, and maintain high code standards. Work-life balance is generally positive, with opportunities for growth through mentorship and technical leadership roles.