Semgrep Software Engineer interview questions & guide 2026

The questions you will encounter during the Semgrep interview process are highly representative of actual, on-the-job engineering tasks rather than abstract academic puzzles. Drawn from real reported interview experiences, these questions are designed to evaluate your practical execution, design thinking, and alignment with the company's engineering culture.

Practical Coding & Implementation

These questions assess your ability to write clean, functional, and maintainable code to solve real-world problems.

• Write a program that models a state machine, such as a vending machine, managing state transitions, inputs, and error conditions.
• Implement a script or service that makes HTTP requests to an external API, parses the JSON payload, and filters the results based on specific business logic.

To succeed in the Semgrep interview process, you must demonstrate both technical proficiency and a collaborative mindset. The engineering team values practical, working software over theoretical optimization, meaning your preparation should focus on real-world engineering scenarios.

Practical Engineering Execution – You must be comfortable writing clean, readable code that works. Expect to handle real-world scenarios such as parsing data, making network calls, and structuring state transitions. Be ready to explain your design choices and write test cases for your code.

Collaborative Problem Solving – Semgrep interviews are highly interactive. You will be expected to discuss design trade-offs, plan projects, and conduct code reviews with senior engineers. Approach these sessions as collaborative working meetings rather than formal exams.

Developer-Centric Empathy – Because Semgrep builds tools for developers, interviewers look for candidates who understand the developer experience. Showing that you care about API usability, clear error messages, and tool performance will set you apart.

Culture & Values Alignment – The team values transparency, personal responsibility, and a supportive working environment. Be prepared to share examples of how you have coached others, managed feedback, and contributed to a positive team dynamic.

The interview process at Semgrep is structured to mirror the daily responsibilities of a Software Engineer. Candidates frequently report that the process feels refreshing and practical, focusing on skills you will actually use on the job rather than rote algorithm memorization.

The process typically begins with an initial recruiter phone screen to discuss your background, your motivation for joining Semgrep, and your career goals. Following this, you will progress to a technical screening phase, which often includes a practical coding challenge or a custom programming exercise. The final stages involve a series of remote onsite interviews covering system design, project planning, code reviews, and behavioral discussions with the hiring manager and engineering peers.

The visual timeline above outlines the typical progression from your initial contact to the final decision. Candidates should use this timeline to pace their preparation, ensuring they focus on coding execution in the early stages before shifting their attention to collaborative design and behavioral preparation for the final rounds. While the exact steps can vary slightly by team and seniority, the emphasis remains on practical engineering throughout.

To excel at Semgrep, you must understand the specific competencies evaluated during the technical assessments. The engineering team looks for candidates who can write functional code, design maintainable systems, and collaborate effectively.

Practical Coding & Scripting

This area evaluates your ability to translate requirements into working software. You will be asked to solve practical engineering challenges, such as building state machines or interacting with web services.

Be ready to go over:

• State management – Structuring state transitions and handling invalid inputs cleanly.
• Web protocols – Making HTTP requests, handling response codes, and parsing payloads.
• Robustness – Writing unit tests, handling edge cases, and implementing error handling.
• Advanced concepts (less common) – Abstract syntax trees (ASTs), basic compiler concepts, and custom parsing techniques.

Example scenarios:

• Implementing a state machine to control a complex workflow like an order processing system.
• Writing a script to fetch, filter, and aggregate security vulnerabilities from a third-party API.

System Design & Project Planning

This section assesses your ability to design systems and plan their execution. You will discuss technical trade-offs and work with an interviewer to break down a larger project into manageable milestones.

Be ready to go over:

• Iterative development – Breaking down a complex design into small, testable releases.
• API design – Creating intuitive, consistent, and secure interfaces for developers.
• Data modeling – Choosing the right storage solutions and structuring schemas for performance.

Example scenarios:

• Designing a system to track and alert developers about reachable vulnerabilities in their dependencies.
• Planning the migration of a legacy database to a new schema without causing downtime.

Code Review & Collaborative Engineering

This evaluation area mimics a typical peer review session. You will review a piece of code, identify bugs or architectural issues, and discuss how to improve it with your interviewer.

Be ready to go over:

• Constructive feedback – Communicating code improvements respectfully and clearly.
• Code quality – Identifying readability issues, code smells, and performance bottlenecks.
• Security best practices – Spotting common vulnerabilities, such as injection risks or insecure dependencies.

Example scenarios:

• Reviewing a pull request containing a new feature and suggesting improvements for performance and security.
• Discussing design trade-offs with a peer engineer during a collaborative code refactoring session.

As a Software Engineer at Semgrep, you will be responsible for designing, building, and maintaining developer-focused security tools. Your day-to-day work will directly impact how organizations secure their software without compromising on development speed.

You will write high-quality, performant code to expand the capabilities of the Semgrep AppSec Platform. This includes working on the static analysis engine, supply chain security tools, and secrets scanning. You will focus on optimizing reachability analysis, ensuring that the platform accurately identifies vulnerabilities that pose a real threat to customers' systems.

Collaboration is a core component of this role. You will work closely with product managers and designers to define the product roadmap and translate customer feedback into technical specifications. You will participate in agile development ceremonies, set weekly goals, and contribute to a culture of continuous learning through mentorship, code reviews, and technical discussions.

Additionally, you will help maintain the reliability and quality of the codebase. This involves writing automated tests, managing technical debt, and ensuring that the platform remains stable and responsive as the user base scales.

To be competitive for a Software Engineer position at Semgrep, you should possess a strong foundation in modern software development practices and a passion for building developer tooling.

• Must-have skills – Strong proficiency in at least one major programming language, such as Python, Go, or OCaml. Solid understanding of software design principles, API development, and web protocols. Experience writing automated tests and participating in code reviews.
• Nice-to-have skills – Prior experience working at a developer tooling company or building application security products. Familiarity with static analysis, compilers, abstract syntax trees (ASTs), or software composition analysis (SCA).
• Experience level – Typically, candidates should have several years of professional software engineering experience, with a proven track record of bringing products to production and collaborating across multidisciplinary teams.
• Soft skills – Excellent communication skills, a high degree of personal responsibility, and the ability to thrive in a collaborative, trust-based engineering environment.

Q: What programming languages are used during the technical interviews? A: You can generally use the programming language you are most comfortable with, though Python is highly recommended for practical scripting and coding tasks due to its readability and standard library capabilities.

Q: How does Semgrep evaluate system design? A: System design at Semgrep is highly collaborative and focused on practical planning. Rather than just drawing architecture diagrams, you will discuss how to break down a project into iterative milestones, manage technical quality, and incorporate customer feedback.

Q: Is prior security industry experience required? A: No, prior security experience is not strictly required, though a strong interest in security and developer tooling is highly valued. The team welcomes engineers with diverse technical backgrounds who are eager to learn.

Q: What is the company's policy on remote work? A: Semgrep supports hybrid and remote working arrangements, depending on the specific team and location. Many roles are open to remote candidates within certain states in the US, with offices in hubs like San Francisco.

• Focus on working code: During coding rounds, prioritize getting a functional solution working before optimizing. The interviewers value working software and practical problem-solving over premature optimization.

• Communicate your thought process: Treat the interview as a collaborative pairing session. Talk through your design decisions, explain your trade-offs, and ask clarifying questions early.

• Show empathy for the developer: Remember that Semgrep builds tools for developers. Whenever you design an API, write code, or discuss a feature, keep the end-user developer's experience in mind.

• Prepare thoughtful questions: Use the behavioral and cultural rounds to ask about team dynamics, how engineering decisions are made, and the company's growth plans. This shows genuine interest and helps you evaluate if the company is a good fit for you.

Securing a Software Engineer role at Semgrep is an exciting opportunity to work on cutting-edge developer tooling and make application security accessible to engineering teams worldwide. The interview process is designed to be a fair, transparent, and practical evaluation of the skills you will use every day on the job. By focusing your preparation on clean coding, collaborative design, and project planning, you can position yourself for success.

To stand out, approach each interview stage as a collaborative working session with your future peers. Demonstrate your technical capabilities, your passion for developer experience, and your alignment with Semgrep's collaborative, high-trust culture. To explore more firsthand interview experiences and detailed company insights, utilize the resources available on Dataford.

The compensation data above reflects the competitive salary range for this position. When evaluating your offer, keep in mind that Semgrep offers a comprehensive package that includes equity, health benefits, learning stipends, and generous vacation time, ensuring long-term support for your professional and personal well-being.