Anakin (Yc S21) Software Engineer Interview Questions 2026

As a Software Engineer at Anakin (Yc S21), you are at the heart of our engineering engine. We are a fast-growing Y Combinator-backed startup, which means our engineering culture is built on extreme ownership, rapid iteration, and high impact. You will not just be writing code; you will be architecting systems from the ground up, defining data models, and scaling our backend infrastructure to meet the demands of our rapidly expanding user base.

This role directly impacts our core product offerings and business scalability. You will be tasked with solving complex distributed systems problems, ensuring fault tolerance, and optimizing API performance. Because we operate in a highly dynamic environment, the work you do today will be shipped and tested by real users almost immediately, requiring a deep commitment to both speed and quality.

Candidates who thrive here are those who are energized by complexity and comfortable navigating ambiguity. You will collaborate closely with product and operations teams to translate evolving business requirements into robust, extendable software. If you are passionate about building scalable solutions and want to accelerate your career in an intense, high-reward startup environment, this role is designed for you.

The following questions represent the types of challenges you will encounter during your interviews at Anakin (Yc S21). They are drawn from actual candidate experiences and are meant to help you identify patterns in our evaluation process, rather than serve as a memorization list.

Data Structures and Algorithms

These questions test your core problem-solving speed and algorithmic efficiency.

Implement a function to perform linked list multiplication.
Solve a dynamic programming problem to find the optimal path in a weighted grid.

Implement a graph traversal algorithm to detect cycles in a directed graph.
Given an array of integers, write an optimized solution to find the longest increasing subsequence.
Reverse a linked list in groups of 'k' nodes.

Machine Coding and OOP

These questions evaluate your ability to write modular, production-ready code under time constraints.

Design a thread-safe class structure for an in-memory cache.
Write a modular program to simulate a parking lot system, ensuring your code is easily extendable.
Implement a basic rate limiter using Object-Oriented principles.
Design the data models and core logic for a library management system.
Refactor a given block of tightly coupled code using appropriate design patterns.

System Design and Architecture

These questions assess your ability to design scalable, fault-tolerant backend systems.

Design a scalable backend architecture for a real-time chat application.
How would you design a distributed URL shortener service?
Discuss how you would ensure data consistency across multiple microservices in a failure scenario.
Design the API and database schema for an e-commerce checkout flow.
Explain how you would implement fault tolerance in a highly available payment processing system.

Core Fundamentals (SQL & Networks)

These questions test your knowledge of the underlying technologies that support your code.

Write an SQL query to find all users who have made more than 3 purchases in the last 30 days.
Explain the difference between TCP and UDP, and when you would use each.
How do you optimize a slow-running SQL query with multiple joins?
Explain how DNS resolution works step-by-step.
Describe the concept of database normalization and its trade-offs.

Preparing for an interview at Anakin (Yc S21) requires a strategic approach. We look for engineers who possess strong theoretical computer science fundamentals and the practical ability to build production-ready systems.

Algorithmic Problem Solving – We evaluate your ability to break down complex logical problems and translate them into optimized code. You can demonstrate strength here by writing clean, bug-free solutions to LeetCode medium-to-hard problems, clearly explaining your time and space complexities.

Engineering Excellence & Machine Coding – In our environment, code must be modular, readable, and extendable. Interviewers will assess your grasp of Object-Oriented Programming (OOP), design patterns, and thread safety. You will stand out by writing structured code that anticipates future feature additions.

System Design Aptitude – For mid-level to senior candidates, we heavily index on High-Level Design (HLD). We evaluate your understanding of API design, schema modeling, and distributed systems. Strong candidates proactively discuss trade-offs regarding scalability, fault tolerance, and system robustness.

Startup Grit and Culture Fit – We operate at a high velocity with demanding expectations. We assess your resilience, communication skills, and ability to handle shifting requirements. You can show strength by discussing past projects where you took end-to-end ownership and delivered results despite constraints.

The interview process for a Software Engineer at Anakin (Yc S21) is rigorous and comprehensive, typically spanning three to five rounds. We begin with a pre-screening assessment or recruiter call to align on your background and the role's expectations. From there, you will move into a series of technical deep dives designed to test your coding speed, architectural thinking, and practical engineering skills.

Our technical rounds are highly interactive. You will face a mix of live Data Structures and Algorithms (DSA) coding, machine coding, and deep-dive system design discussions. We place a strong emphasis on logical communication; we want to hear how you think, how you structure a schema, and how you justify your technical trade-offs.

Expect a fast-paced evaluation process where requirements might evolve dynamically, mimicking our actual startup environment. The final stages will focus heavily on culture fit, resume deep-dives, and your readiness to tackle the demanding, high-ownership reality of our engineering team.

This visual timeline outlines the typical progression from your initial pre-screen through the core technical rounds and final culture-fit discussions. Use this to pace your preparation, ensuring you are ready for algorithmic coding early on, followed by heavier architectural and behavioral discussions in the later stages. Note that the exact number of rounds may vary slightly based on your seniority and team alignment.

Data Structures and Algorithms (DSA)

We use DSA rounds to evaluate your fundamental problem-solving speed and logical accuracy. Interviewers want to see how quickly you can identify the right data structure for a given problem and implement an optimized solution. Strong performance means writing clean, syntactically correct code in your language of choice (e.g., C++, Java, Python) while actively communicating your thought process.

Be ready to go over:

Dynamic Programming (DP) & Graphs – Core algorithmic concepts frequently tested in our face-to-face shared-screen rounds.
Linked Lists & Trees – Foundational structures; expect questions requiring manipulation and traversal.
Optimization Techniques – Improving brute-force solutions to optimal time and space complexities.
Advanced concepts (less common) – Tries, Segment Trees, and advanced graph algorithms (Dijkstra's, A*).

Example questions or scenarios:

"Implement linked list multiplication."
"Solve a pathfinding problem on a grid using graph traversal techniques."
"Optimize a recursive solution using memoization or tabulation."

Machine Coding and Low-Level Design (LLD)

This round simulates your day-to-day coding environment. We evaluate your ability to take a set of requirements and build a functional, well-structured mini-application within 60 minutes. Strong performance involves writing code that is modular, extensible, and adheres to solid design patterns.

Be ready to go over:

Object-Oriented Programming (OOP) – Encapsulation, inheritance, and polymorphism applied to real-world entities.
Schema Design & Data Modeling – Designing efficient database schemas for the features you are building.
Design Patterns – Practical application of Singleton, Factory, or Strategy patterns.
Advanced concepts (less common) – Thread safety, handling concurrency, and writing testable interfaces under time pressure.

Example questions or scenarios:

"Design and implement a thread-safe logging framework."
"Build the core logic and schema for a parking lot or inventory management system."
"Refactor a given procedural script into a modular, extendable OOP design."

Tip

You will be expected to code in the language you are most comfortable with. Ensure your local development environment is fully set up before the machine coding round, as you may need to run and test your code live.

High-Level Design (HLD) and Architecture

For roles requiring more experience, the HLD round is critical. We assess your ability to design scalable, distributed systems that can handle high throughput. We look for candidates who can confidently navigate the trade-offs between consistency, availability, and partition tolerance.

Be ready to go over:

API Design – Structuring RESTful or GraphQL APIs for efficiency and clarity.
Distributed Systems – Scalability, fault tolerance, and system robustness under heavy load.
Database Choices – When to use SQL vs. NoSQL, and how to optimize queries and indexing.
Advanced concepts (less common) – Caching strategies (Redis/Memcached), message queues (Kafka/RabbitMQ), and microservices architecture.

Example questions or scenarios:

"Design a scalable backend system for a high-traffic ride-sharing application."
"How would you ensure fault tolerance and data consistency in a distributed payment gateway?"
"Walk me through the architecture of your most complex recent project, highlighting the bottlenecks you overcame."

Core Computer Science Fundamentals

Beyond coding and design, we evaluate your grasp of the underlying technologies that power our applications. This includes your knowledge of databases and networking protocols.

Be ready to go over:

SQL Queries – Writing complex joins, aggregations, and understanding query execution plans.
Basic Networking – TCP/IP, HTTP/HTTPS protocols, and DNS resolution.
Operating Systems – Basic understanding of processes, threads, and memory management.

Example questions or scenarios:

"Write an SQL query to find the second highest salary in an employee database."
"Explain what happens at the network layer when you type a URL into a browser."
"Identify the performance bottlenecks in a provided complex SQL join."

As a Software Engineer at Anakin (Yc S21), your day-to-day will be dynamic and heavily focused on execution. You will be responsible for designing, developing, and deploying backend services that power our core products. This involves writing high-quality, thread-safe code, designing efficient database schemas, and ensuring our APIs are robust enough to handle significant scale.

You will work in a highly collaborative, fast-paced setting, partnering closely with product managers to define technical requirements and with operations teams to ensure smooth deployments. Because we are a startup, requirements can evolve rapidly. You will be expected to take extreme ownership of your features, from the initial whiteboard design all the way through to production monitoring and bug fixing.

A significant portion of your time will be spent on system architecture and code optimization. You will actively participate in code reviews, enforcing modularity and readability standards across the engineering team. Whether you are optimizing a slow SQL query or architecting a fault-tolerant microservice, your work will directly influence the performance and reliability of the platform.

To succeed as a Software Engineer at Anakin (Yc S21), you need a strong blend of theoretical knowledge and hands-on engineering experience. We look for candidates who can hit the ground running and adapt quickly to our tech stack.

Must-have skills – Deep proficiency in at least one object-oriented programming language (e.g., C++, Java, Python). Strong foundational knowledge of Data Structures, Algorithms, and OOP principles. Solid experience with SQL, relational database design, and building RESTful APIs.
Experience level – Typically, candidates have a background in computer science or a related field, often from top-tier engineering institutions. We look for engineers with a proven track record of building and scaling backend systems.
System Design – For mid-level and senior candidates, practical experience with distributed systems, fault tolerance, and scalable architectures is strictly required.
Soft skills – Exceptional logical communication. You must be able to articulate complex technical decisions clearly and concisely to both technical and non-technical stakeholders.
Nice-to-have skills – Prior experience in a fast-paced, high-growth startup environment. Familiarity with modern cloud infrastructure (AWS/GCP), containerization (Docker/Kubernetes), and advanced caching mechanisms.

Q: How difficult are the technical interviews, and how should I prepare? The technical rounds are rigorous and lean heavily on LeetCode medium-to-hard concepts, alongside practical machine coding. Plan to spend significant time practicing live coding without an IDE, brushing up on graph and DP algorithms, and reviewing scalable system design principles.

Q: What is the company culture and working style like for a Software Engineer? Anakin (Yc S21) operates with high intensity and a strong startup ethos. We expect high ownership, fast execution, and dedication to the product. The environment is demanding and fast-paced, meaning you will often tackle complex problems with tight deadlines, requiring significant focus and drive.

Q: What differentiates a successful candidate from an unsuccessful one? Successful candidates do not just write working code; they write clean, modular, and optimized code while communicating their logic flawlessly. They handle ambiguous requirements gracefully, ask the right clarifying questions, and show a deep understanding of system scalability.

Q: How long does the interview process typically take? The end-to-end process usually spans 2 to 4 weeks, depending on candidate availability and team scheduling. We move quickly once a candidate successfully passes the initial technical screens.

Q: Will I be expected to know a specific programming language? No, we are generally language-agnostic for the coding rounds. You are encouraged to code in the language you prefer (such as C++, Java, or Python), provided you can write syntactically correct and highly optimized code.

Clarify the Ambiguity: Startup environments are inherently ambiguous, and our interviewers may intentionally provide vague requirements to see how you respond. Always ask clarifying questions before writing a single line of code.
Communicate Your Trade-offs: In both machine coding and HLD rounds, there is rarely one perfect answer. Clearly articulate why you chose a specific database, design pattern, or algorithm, and acknowledge the associated trade-offs.

Note

Do not make assumptions about the scale or constraints of a problem. Always confirm the expected input sizes and latency requirements with your interviewer to ensure your solution is appropriately optimized.

Prepare Your Local Environment: For machine coding rounds, you may be required to share your screen and write code locally. Ensure your preferred IDE, compilers, and necessary dependencies are fully set up and tested before the interview begins.
Showcase Your Startup Grit: During behavioral and resume discussions, highlight experiences where you took extreme ownership, worked through difficult technical challenges, and delivered impact quickly. We value resilience and a proactive mindset.

Interviewing for a Software Engineer role at Anakin (Yc S21) is an opportunity to showcase your technical depth, architectural vision, and readiness to thrive in a high-impact startup environment. You will be evaluated heavily on your algorithmic problem-solving, your ability to write clean and modular machine code, and your aptitude for designing scalable distributed systems.

To succeed, focus your preparation on mastering core DSA concepts (especially DP and Graphs), practicing timed machine coding exercises, and deeply understanding the trade-offs in High-Level Design. Remember to communicate clearly, embrace ambiguity, and approach every problem with an ownership mindset. Focused, structured preparation will significantly elevate your performance across all rounds.

This module provides insight into the compensation landscape for this role. Use this data to understand the standard ranges and equity components typical for our engineering levels, ensuring you are well-informed when it comes time for offer discussions.

We believe in hiring engineers who are eager to build the future and scale systems that matter. Continue to refine your skills, explore additional insights on Dataford, and step into your interviews with confidence. You have the potential to make a massive impact here—good luck with your preparation!

Interview Guides

Anakin (Yc S21) Software Engineer interview questions & guide 2026

What is a Software Engineer at Anakin (Yc S21)?

Common Interview Questions

Data Structures and Algorithms

Machine Coding and OOP

System Design and Architecture

Core Fundamentals (SQL & Networks)

The questions most likely to come up

See how a strong candidate would approach this

Prioritizing Across Competing Client Projects

Getting Ready for Your Interviews

Interview Process Overview

The interview process, end to end

Deep Dive into Evaluation Areas

Data Structures and Algorithms (DSA)

Machine Coding and Low-Level Design (LLD)

Tip

High-Level Design (HLD) and Architecture

Core Computer Science Fundamentals

Key Responsibilities

Role Requirements & Qualifications

Frequently Asked Questions

Other General Tips

Note

What candidates actually reported

Summary & Next Steps