The role of a Software Engineer at YES (Yield Engineering Systems, Inc.) is pivotal in designing and developing advanced software solutions for semiconductor equipment. As a key player in an organization that transforms materials and surfaces at the nanoscale, you will contribute to high-tech projects that have far-reaching implications in industries ranging from consumer electronics to healthcare. Your work will impact product development, operational efficiency, and ultimately, user experiences across various applications, including AI, IoT devices, and diagnostic tests. Working in this role means engaging with complex challenges and innovative technologies. You will be part of a team that is not only focused on meeting customer needs but also on pushing the boundaries of what technology can achieve. The position is critical as it combines both software development and hardware control, requiring you to navigate the intricacies of real-time system interactions. This makes the role both exciting and demanding, appealing to those who thrive in fast-paced, tech-driven environments.
Initial Screening
reportedFocuses on your technical background and experience.
What to demonstrate
- Focuses on your technical background and experience
- Depth in C++
How to prepare
- Be able to walk your CV end to end in two minutes, and say why this company specifically.
- Have your salary expectations, notice period and location constraints ready, and ask for the rest of the loop in writing.
Coding Assessments
reportedDelve deeper into your technical skills through coding challenges.
What to demonstrate
- Delve deeper into your technical skills through coding challenges
- Depth in C++
How to prepare
- Answer aloud and timed: Describe how you would implement a linked list in C++.
- Answer aloud and timed: What are the differences between
mallocandcallocin C?
Problem-Solving Scenarios
reportedEvaluate your ability to solve complex problems creatively.
What to demonstrate
- Evaluate your ability to solve complex problems creatively
- Depth in C++
How to prepare
- Answer aloud and timed: How do you optimize a SQL query for performance?
- Answer aloud and timed: Write a function to reverse a string in C++.
Behavioral Interviews
reportedAssess your cultural fit and collaborative skills.
What to demonstrate
- Assess your cultural fit and collaborative skills
- Depth in C++
How to prepare
- Prepare three examples from your own work, each with a decision you made and an outcome you can quantify.
- Re-read the description of the behavioral interviews above and write down what you would ask to confirm before it.
Final Evaluations
reportedComprehensive evaluation of technical expertise and communication.
What to demonstrate
- Comprehensive evaluation of technical expertise and communication
- Depth in C++
How to prepare
- Answer aloud and timed: Discuss the time complexity of various sorting algorithms.
- Answer aloud and timed: Solve a problem related to data structures, such as finding duplicates in an array.
PracHub editorial advice for the preparation topics above.
Going into the loop without having done this.
Practice Coding: Regularly practice coding challenges on platforms like LeetCode or HackerRank to sharpen your skills.
Going into the loop without having done this.
Understand the Product: Familiarize yourself with YES's products and the technology behind them. This knowledge can help you contextualize your answers during interviews.
Going into the loop without having done this.
Prepare for Behavioral Questions: Reflect on your past experiences and prepare specific examples that highlight your problem-solving and leadership abilities.
Going into the loop without having done this.
Clarify Your Thought Process: During technical interviews, verbalize your thinking process. This will help interviewers understand your approach to problem-solving.
Choose a category, try a prompt, then open its approach, worked solution or follow-up when you need it.
What are the primary differences between C++ and Java in terms of memory management?
What are the primary differences between C++ and Java in terms of memory management?
Approach
- Say what the runtime actually does before reasoning about the code.
- Name what is shared across threads and what owns each piece of state.
- Identify the window where an invariant is briefly untrue.
- Distinguish a value from a reference to it, and say which one you handed out.
Follow-up
- What happens if two callers reach this at the same time?
- Where could this allocate more than you expect?
Can you explain the concept of multithreading and its importance in software development?
Can you explain the concept of multithreading and its importance in software development?
Approach
- Say what the runtime actually does before reasoning about the code.
- Name what is shared across threads and what owns each piece of state.
- Identify the window where an invariant is briefly untrue.
- Distinguish a value from a reference to it, and say which one you handed out.
Follow-up
- What happens if two callers reach this at the same time?
- Where could this allocate more than you expect?
Describe how you would implement a linked list in C++.
Describe how you would implement a linked list in C++.
Approach
- Restate the input: its shape, its size, and what is guaranteed about it.
- Name the brute-force solution and its complexity before improving on it.
- Choose the data structure from the access pattern, not from familiarity.
- State the target complexity and say which constraint rules the naive version out.
Follow-up
- How does this change if the input no longer fits in memory?
- What is the worst case, and how likely is it on real data?
Write a function to reverse a string in C++.
Write a function to reverse a string in C++.
Approach
- Restate the input: its shape, its size, and what is guaranteed about it.
- Name the brute-force solution and its complexity before improving on it.
- Choose the data structure from the access pattern, not from familiarity.
- State the target complexity and say which constraint rules the naive version out.
Follow-up
- How does this change if the input no longer fits in memory?
- What is the worst case, and how likely is it on real data?
How would you approach finding the shortest path in a graph?
How would you approach finding the shortest path in a graph?
Approach
- Restate the input: its shape, its size, and what is guaranteed about it.
- Name the brute-force solution and its complexity before improving on it.
- Choose the data structure from the access pattern, not from familiarity.
- State the target complexity and say which constraint rules the naive version out.
Follow-up
- How does this change if the input no longer fits in memory?
- What is the worst case, and how likely is it on real data?
Can you implement a binary search algorithm?
Can you implement a binary search algorithm?
Approach
- Restate the input: its shape, its size, and what is guaranteed about it.
- Name the brute-force solution and its complexity before improving on it.
- Choose the data structure from the access pattern, not from familiarity.
- State the target complexity and say which constraint rules the naive version out.
Follow-up
- How does this change if the input no longer fits in memory?
- What is the worst case, and how likely is it on real data?
Discuss the time complexity of various sorting algorithms.
Discuss the time complexity of various sorting algorithms.
Approach
- Restate the input: its shape, its size, and what is guaranteed about it.
- Name the brute-force solution and its complexity before improving on it.
- Choose the data structure from the access pattern, not from familiarity.
- State the target complexity and say which constraint rules the naive version out.
Follow-up
- How does this change if the input no longer fits in memory?
- What is the worst case, and how likely is it on real data?
Solve a problem related to data structures, such as finding duplicates in an array.
Solve a problem related to data structures, such as finding duplicates in an array.
Approach
- Restate the input: its shape, its size, and what is guaranteed about it.
- Name the brute-force solution and its complexity before improving on it.
- Choose the data structure from the access pattern, not from familiarity.
- State the target complexity and say which constraint rules the naive version out.
Follow-up
- How does this change if the input no longer fits in memory?
- What is the worst case, and how likely is it on real data?
How do you optimize a SQL query for performance?
How do you optimize a SQL query for performance?
Approach
- Name the grain you start from and join outward from it.
- Check whether any join is one-to-many before aggregating, or the sums inflate.
- Say which index the query would use, and what makes it unusable.
- Handle the rows that do not match: that is usually the actual question.
Follow-up
- How does the query change if that join becomes one-to-many?
- What happens to this when the table is ten times larger?
Hold a per-tenant active cap against concurrent creates
A tenant on the standard plan may hold at most 50 resources with status='active'. The create handler runs SELECT count(*) FROM resource WHERE tenant_id = $1 AND status = 'active', compares to 50, then inserts. Two creates arrive 3 ms apart on different instances and the tenant lands at 51. Name the anomaly, say whether PostgreSQL 16 READ COMMITTED or REPEATABLE READ prevents it and why, then give an implementation that holds the cap at READ COMMITTED with the exact statements. Finally, say what changes when the cap is 'at most one running export per tenant' on job_run.
Approach
- Name it: write skew. The two transactions read an overlapping set and write disjoint rows, so there is no row-level conflict for the engine to detect and each commit is individually legal.
- Rule out the levels precisely. READ COMMITTED takes a fresh snapshot per statement and takes no lock on the counted rows, so both see 49. PostgreSQL's REPEATABLE READ is snapshot isolation: it removes non-repeatable reads and phantoms within the snapshot but still admits write skew, because the anomaly is not a re-read of a changed row, it is a read of a set that a concurrent transaction invalidates. Only SERIALIZABLE closes it, by tracking the read dependency and aborting one transaction with SQLSTATE 40001 — a guarantee that exists only if the application re-runs the whole transaction from the read.
- Convert the set predicate into a single-row conflict: keep tenant.active_resource_count and run UPDATE tenant SET active_resource_count = active_resource_count + 1 WHERE tenant_id = $1 AND active_resource_count < 50 in the same transaction as the INSERT. Zero affected rows is the cap, returned as 409. The row lock serialises the decision at any isolation level, and contention is bounded to one tenant's row — which is also the fair-scheduling unit, unlike a global counter that would convoy every tenant behind one row.
- State the cost you just took on: a counter is a second source of truth that can drift, so every path that changes status must adjust it inside the same transaction, and a periodic reconciliation has to exist, with resource_revision as the authority for what the count should have been.
Follow-up
- A resource moves from archived back to active. Which statements change, and what breaks if the counter update and the status change land in different transactions?
- The cap becomes plan-dependent and a plan can change mid-month. Where does the number 50 live, and who reads it?
What are the differences between `malloc` and `calloc` in C?
What are the differences between malloc and calloc in C?
Approach
- Clarify what is being asked and what a complete answer contains.
- State your assumptions explicitly before working the problem.
- Say what you would check first and why it is the highest-information step.
- Work from the requirement backwards to the design.
Follow-up
- What assumption would you test first?
- How would you know your answer was wrong?
How would you design a software solution for a new semiconductor device?
How would you design a software solution for a new semiconductor device?
Approach
- Fix the scope first: who calls this, how often, and what they do when it fails.
- Name the read and write paths separately; they rarely have the same bottleneck.
- Choose a partition key and say what query it makes expensive.
- State the consistency you need, and where you are willing to be stale.
Follow-up
- What breaks first when traffic grows ten times?
- How does this behave when that dependency is down for an hour?
If you were tasked with improving an existing software process, how would you go about it?
If you were tasked with improving an existing software process, how would you go about it?
Approach
- Clarify what is being asked and what a complete answer contains.
- State your assumptions explicitly before working the problem.
- Say what you would check first and why it is the highest-information step.
- Work from the requirement backwards to the design.
Follow-up
- What assumption would you test first?
- How would you know your answer was wrong?
What factors would you consider in designing a user interface for a technical product?
What factors would you consider in designing a user interface for a technical product?
Approach
- Clarify what is being asked and what a complete answer contains.
- State your assumptions explicitly before working the problem.
- Say what you would check first and why it is the highest-information step.
- Work from the requirement backwards to the design.
Follow-up
- What assumption would you test first?
- How would you know your answer was wrong?
Explain your strategy for testing and validating software before deployment.
Explain your strategy for testing and validating software before deployment.
Approach
- Clarify what is being asked and what a complete answer contains.
- State your assumptions explicitly before working the problem.
- Say what you would check first and why it is the highest-information step.
- Work from the requirement backwards to the design.
Follow-up
- What assumption would you test first?
- How would you know your answer was wrong?
Discuss your approach to debugging a system that has intermittent failures.
Discuss your approach to debugging a system that has intermittent failures.
Approach
- Establish what changed and when, before forming any theory.
- Pick a bisection that eliminates candidates whichever way it turns out.
- Check the instrumentation before believing the symptom.
- Separate the trigger from the cause; the deploy is rarely the bug.
Follow-up
- What would you look at first, and what would it rule out?
- How would you tell a cause from a coincidence here?
Built from the rounds and topics YES candidates report.
Prepare, practise & reflect
One practical outcome each day. Spend longer where you need it.
0 / 7 done01Map the YES loop
- Write out the reported sequence: Initial Screening, Coding Assessments, Problem-Solving Scenarios, Behavioral Interviews, Final Evaluations.
- For each round, write one sentence on what it is judging, from the description above, and mark the one you are least ready for.
Deliverable: A one-page map of the 5 reported rounds, with the weakest marked.
02Work C++
- Spend the session on C++, which YES candidates report being tested on.
- Write one worked example in C++ and time yourself on it.
Deliverable: One timed worked example in C++.
03Work C#
- Spend the session on C#, which YES candidates report being tested on.
- Write one worked example in C# and time yourself on it.
Deliverable: One timed worked example in C#.
04Work Data Structures
- Spend the session on Data Structures, which YES candidates report being tested on.
- Write one worked example in Data Structures and time yourself on it.
Deliverable: One timed worked example in Data Structures.
05Answer out loud: Technical / Domain Questions
- Answer aloud, timed: What are the primary differences between C++ and Java in terms of memory management?
- Answer aloud, timed: Can you explain the concept of multithreading and its importance in software development?
Deliverable: Spoken answers to 2 reported Technical / Domain Questions question(s), under time.
06Answer out loud: Coding / Algorithms
- Answer aloud, timed: Write a function to reverse a string in C++.
- Answer aloud, timed: How would you approach finding the shortest path in a graph?
Deliverable: Spoken answers to 2 reported Coding / Algorithms question(s), under time.
07Answer out loud: Behavioral / Leadership
- Answer aloud, timed: Describe a time when you had to work under pressure. How did you handle it?
- Answer aloud, timed: Give an example of a project where you took the lead. What challenges did you face?
Deliverable: Spoken answers to 2 reported Behavioral / Leadership question(s), under time.
Expand any day for tasks and deliverables. Your progress is saved on this device.
Behavioural rounds judge the decision you made and what it cost.
Describe a time when you had to work under pressure. How did you handle it?
Describe a time when you had to work under pressure. How did you handle it?
Approach
- Pick a story where you made the decision, not one where you watched it.
- State the situation in two sentences and spend the rest on the reasoning.
- Give the blast radius: what could have broken, and what you measured.
- Name the disagreement and how you resolved it with evidence.
Follow-up
- What would you do differently if you ran that again?
- How did you know your change caused the improvement?
Give an example of a project where you took the lead. What challenges did you face?
Give an example of a project where you took the lead. What challenges did you face?
Approach
- Pick a story where you made the decision, not one where you watched it.
- State the situation in two sentences and spend the rest on the reasoning.
- Give the blast radius: what could have broken, and what you measured.
- Name the disagreement and how you resolved it with evidence.
Follow-up
- What would you do differently if you ran that again?
- How did you know your change caused the improvement?
How do you prioritize tasks when working on multiple projects?
How do you prioritize tasks when working on multiple projects?
Approach
- Pick a story where you made the decision, not one where you watched it.
- State the situation in two sentences and spend the rest on the reasoning.
- Give the blast radius: what could have broken, and what you measured.
- Name the disagreement and how you resolved it with evidence.
Follow-up
- What would you do differently if you ran that again?
- How did you know your change caused the improvement?
Discuss how you handle conflicts within a team setting.
Discuss how you handle conflicts within a team setting.
Approach
- Pick a story where you made the decision, not one where you watched it.
- State the situation in two sentences and spend the rest on the reasoning.
- Give the blast radius: what could have broken, and what you measured.
- Name the disagreement and how you resolved it with evidence.
Follow-up
- What would you do differently if you ran that again?
- How did you know your change caused the improvement?
What motivates you to perform well in your role?
What motivates you to perform well in your role?
Approach
- Pick a story where you made the decision, not one where you watched it.
- State the situation in two sentences and spend the rest on the reasoning.
- Give the blast radius: what could have broken, and what you measured.
- Name the disagreement and how you resolved it with evidence.
Follow-up
- What would you do differently if you ran that again?
- How did you know your change caused the improvement?
- 01
Describe a time when you had to work under pressure. How did you handle it?
- 02
Give an example of a project where you took the lead. What challenges did you face?
- 03
How do you prioritize tasks when working on multiple projects?
- 04
Discuss how you handle conflicts within a team setting.
How difficult is the interview process, and how much preparation time is typical?
The interview process at YES is considered rigorous, with a mix of technical and behavioral assessments. Candidates typically spend several weeks preparing, focusing on coding skills, problem-solving techniques, and understanding the company culture.
YES Software Engineer candidate reports ↗What differentiates successful candidates?
Successful candidates demonstrate a strong technical foundation, effective communication skills, and the ability to collaborate with others. They also align their values with those of YES, reflecting a commitment to innovation and teamwork.
YES Software Engineer candidate reports ↗What is the culture and working style like at YES?
YES fosters a collaborative and innovative work environment where team members are encouraged to share ideas and support one another. The company values integrity and is committed to diversity and inclusion.
YES Software Engineer candidate reports ↗What is the typical timeline from initial screen to offer?
The timeline can vary, but candidates can expect to complete the interview process within a few weeks. Prompt communication and scheduling are common, with feedback provided after each stage.
YES Software Engineer candidate reports ↗Are there remote work or hybrid expectations?
While the specific role may require some on-site presence, YES is open to flexible work arrangements depending on the team's needs and the nature of the projects.
YES Software Engineer candidate reports ↗How hard is the YES interview?
Candidates most commonly rate YES interviews as medium, based on 44 reported interviews. About 52% of candidates who interview go on to receive an offer.
YES Software Engineer candidate reports ↗What topics does YES test in interviews?
YES interviews most often cover Stakeholder Communication, Requirements Gathering, Problem Solving, Business Development, and C++. The exact emphasis depends on the specific role you apply for.
YES Software Engineer candidate reports ↗Is YES a good place to work?
Employees rate YES 4.1 out of 5 overall, based on aggregated workplace reviews spanning career growth, work-life balance, compensation, culture, and management.
YES Software Engineer candidate reports ↗Where is YES headquartered?
YES is headquartered in Holmdel, NJ.
YES Software Engineer candidate reports ↗Sources & methodology 3 sources ↗
Official role evidence, timestamped platform data and clearly labeled preparation advice.
- 01YES Software Engineer candidate reports ↗
Company-reported rounds, questions and FAQ.
candidate · Accessed 2026-09-22 - 02PracHub Software Engineer practice ↗
PracHub practice material, not company-reported.
platform · Accessed 2026-09-22 - 03PracHub preparation framework ↗
PracHub preparation guidance.
platform · Accessed 2026-09-22
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