As a Software Engineer at TSMC, you are at the intersection of cutting-edge semiconductor manufacturing and high-scale enterprise computing. Your role is vital to maintaining the operational integrity of the world’s most advanced fabrication facilities. Whether you are developing Automated Material Handling Systems (AMHS), optimizing Corporate IT Services, or driving Advanced Quality Excellence through data-driven software solutions, your work directly impacts the global technology supply chain. This position demands a unique blend of technical precision and operational awareness. You will not only write robust, scalable code but also collaborate with cross-functional teams to ensure that software solutions integrate seamlessly with the complex, 24/7 environment of a semiconductor fab. It is a role for engineers who thrive on solving high-stakes challenges where efficiency, reliability, and precision are the primary metrics for success.
Technical Screening
reportedInitial assessment of technical skills to determine candidate suitability.
What to demonstrate
- Initial assessment of technical skills to determine candidate suitability
- Depth in AMHS (Automated Material Handling Systems)
How to prepare
- Answer aloud and timed: Describe your experience with real-time systems or automated material handling software.
- Answer aloud and timed: How do you ensure high availability and reliability in your software deployments?
Technical Deep-Dive
reportedIn-depth technical interviews with hiring managers and cross-functional team members.
What to demonstrate
- In-depth technical interviews with hiring managers and cross-functional team members
- Depth in AMHS (Automated Material Handling Systems)
How to prepare
- Answer aloud and timed: What is your approach to debugging complex distributed systems?
- Answer aloud and timed: Explain the importance of data integrity in a manufacturing environment.
Cultural Alignment Discussion
reportedDiscussion to assess candidate's fit for the international working environment at TSMC.
What to demonstrate
- Discussion to assess candidate's fit for the international working environment at TSMC
- Depth in AMHS (Automated Material Handling Systems)
How to prepare
- Answer aloud and timed: How do you handle hardware-software integration challenges?
- Answer aloud and timed: Walk me through a time you identified a bottleneck in a system and how you resolved it.
Final Decision
reportedFinal evaluation and decision-making process regarding the candidate's application.
What to demonstrate
- Final evaluation and decision-making process regarding the candidate's application
- Depth in AMHS (Automated Material Handling Systems)
How to prepare
- Answer aloud and timed: How do you prioritize tasks when faced with conflicting project requirements?
- Answer aloud and timed: Describe a situation where you had to troubleshoot an issue with limited documentation.
15 candidate reports. Individual accounts describe a particular role and hiring cycle.
TSMC Software Engineer one-hour manager interview about role and experience
The manager was very nice, and the interview matched what I expected for an engineering role. It lasted about an hour and covered role-related topics alongside my previous experience. The straightforward structure made it easier to focus on my background. The questions did not seem designed to be tricky. They were about matching my experience to what the team needed. It felt average in difficulty…
Read full experienceTSMC Software Engineer interview: projects, research, and practical challenges
On Microsoft Teams, the interview began with a short self-introduction and then turned to my projects and research. The interviewers asked for details, the specific problems I had encountered, and how I solved them. They were nice and respectful, and the process felt smooth. The conversation was friendly but still required enough clarity about my work to show how I approached challenges. The diff…
Read full experienceSoftware Engineer interview at TSMC: presentation follow-ups
I began with a self-introduction presentation of about ten minutes. My supervisor asked questions from what I presented and sometimes interrupted, so I had to respond in real time rather than treat the presentation as a formality. The team then explained its work and responsibilities, and I was able to ask questions. The process felt structured and respectful. Its main challenge was handling acti…
Read full experienceTSMC Software Engineer interview: waiting after the interview invitation
At the time of my update, I was only at the early stage. I had just received the interview invitation and was waiting to see how the experience would go. I was looking for guidance from people who had already been through the process because I did not yet have firsthand details. I could not judge the difficulty because I had not interviewed yet. I felt anticipatory and cautious, trying to get som…
Read full experienceTSMC Software Engineer interview: a short ML and semiconductor screen
My interview was mostly behavioral, with technical questions mixed in. They were particularly interested in ML and any semiconductor experience I had, so I had to connect my background to those areas. What surprised me was how short it was for the time booked: about 30 minutes. Even in that brief window, both a team manager and a director attended and asked questions. That raised the stakes becau…
Read full experiencePracHub editorial advice for the preparation topics above.
Focus on the 'Why'
When explaining your technical decisions, always explain the reasoning behind your choice of technology or architecture.
Prepare for Ambiguity
Be ready to discuss scenarios where you had to make a decision with incomplete information; show how you mitigate risk.
Study the Industry
Understanding the basics of semiconductor manufacturing will give you a significant advantage in explaining how your software fits into the TSMC ecosystem.
Do not underestimate the importance of soft skills
Even the best coder will struggle if they cannot effectively communicate their technical decisions to stakeholders.
Choose a category, try a prompt, then open its approach, worked solution or follow-up when you need it.
Merge partitioned event streams into one ordered feed with bounded lateness
The read-model service consumes 64 log partitions carrying about 4,000 events per second in total. Each partition is ordered within itself, but partitions drift by up to 30 seconds, and the activity feed must present a tenant's events in occurred_at order. Produce the merge. State its complexity, the buffer it requires in events and in bytes, what happens when one partition is idle, and what you do with an event that arrives after you have already emitted its position. Payloads average 1 KB.
Approach
- Merge with a min-heap over the 64 partition heads keyed on (occurred_at, event_id): O(log P) per event and O(n log P) overall. The tie-break on event_id is what makes the output deterministic when two partitions carry the same millisecond, which matters because the feed is paginated and a non-deterministic order reorders pages under the reader.
- Emitting the heap head is only correct once every partition has produced everything up to that timestamp, so the emit condition is a watermark: the minimum across partitions of the highest occurred_at seen, less the allowed lateness. Events are held until the watermark passes them, which is what turns individually ordered streams into a jointly ordered one.
- Size the buffer from the lateness rather than guessing: 4,000 events per second times 30 seconds is 120,000 buffered events, and at 1 KB each about 120 MB of heap. That number is the real price of the ordering guarantee and belongs in front of whoever asked for it.
- Handle the idle partition explicitly, because it fails the feed rather than corrupting it: a partition with no traffic never advances its own maximum, so the watermark freezes and output stops entirely. Either every partition emits a periodic idle marker carrying the broker's current time, or the watermark falls back to wall clock for a partition silent beyond a threshold.
Follow-up
- The lateness budget is raised to five minutes. What is the new buffer, and what besides memory changes?
- The consumer restarts. Where does it resume from, and what does the feed look like for the first 30 seconds?
Find overlapping job attempts and peak concurrency from lease records
A day of job_run history yields about 50,000,000 attempt records: (job_run_id, job_type, attempt, started_at, finished_at which is NULL when the worker died, lease_expires_at). Leases expire on a clock, so a job that outran its lease ran twice. Produce (a) every job_run_id whose attempts overlapped in wall-clock time and (b) the peak number of simultaneously running attempts per job_type with the minute it occurred. Target O(n log n). State how you treat a NULL finished_at and what clock skew does to your answer.
Approach
- Define the interval before sorting anything: an attempt occupies [started_at, COALESCE(finished_at, lease_expires_at)). finished_at is observed and lease_expires_at is only a promise, so every attempt without a finish contributes an estimate and the whole result is a lower bound on overlap rather than an exact count.
- For peak concurrency, sweep: emit 2n endpoints, sort by (timestamp, kind) with ends ordered before starts at equal timestamps, then walk the sequence maintaining a counter per job_type and record each type's maximum with its timestamp. O(n log n) dominated by the sort, O(n) space, or O(1) extra if the sort is external and the walk streams.
- For overlap detection, do not compare attempts pairwise. A single global sort by (job_run_id, started_at) gives both the grouping and the order; within a group, keep the maximum end seen so far and report an overlap exactly when the next start is less than that running maximum, which is one linear pass after the sort.
- Half-open intervals matter and are easy to get wrong: with closed intervals an attempt ending at the same millisecond another begins reads as concurrency two, and across 50,000,000 records that artefact swamps the real signal.
Follow-up
- A handler is not idempotent and you have found 400 overlapping jobs. Which of them actually caused damage, and what would you query to find out?
- Peak concurrency for one job_type is 4 against a configured cap of 4. Is the cap working, or is the data hiding attempts that never started?
Archive a resource graph without breaking live references or recursing
Resources reference other resources within a tenant; for the largest tenant the reference table holds up to 2,000,000 nodes and 8,000,000 edges. Archiving a resource must archive everything reachable from it that nothing outside the set still references, refuse when a live external referrer exists, and terminate when references form cycles, which they legitimately do. Produce the archive order and the refusal list, targeting O(V+E). Say what stops the traversal crossing a tenant boundary, and why recursion is the wrong control structure at this size.
Approach
- Load the subgraph with the tenant predicate on both endpoints of the edge, not only on the side you started from. Scoping the left table alone is the classic cross-tenant leak: one mis-entered edge then pulls another tenant's resources into the traversal and, worse, into the archive.
- Traverse iteratively with an explicit stack. A 2,000,000-node graph can hold a chain deep enough to exhaust a native stack in the low tens of thousands of frames, and that failure is a process crash rather than an error you can return.
- Treat cycles as data rather than corruption: compute strongly connected components with Tarjan in O(V+E) using its own explicit stack, then condense. The condensation is a DAG, so a topological order over it gives the archive order, and every member of a component archives in one transaction because no order within a cycle is valid.
- Decide refusals with reverse edges. A candidate is archivable only if every in-edge originates inside the candidate set, so build the transpose or count in-degrees restricted to the visited set, and emit each blocked resource with the id of the external referrer, which is the only part of the answer an operator can act on.
Follow-up
- The graph is read in one query and the archive writes a minute later. What can change in between, and how do you make the write safe?
- The candidate set is 400,000 resources. Is that one transaction, and if not, what does a half-finished archive look like to a reader?
Replace offset paging on the resource feed with keyset
resource holds resource_id, tenant_id, owner_user_id, title, body_ref, version, status ('draft','active','archived','deleted'), created_at, updated_at, deleted_at, with an index on (tenant_id, status, updated_at DESC, resource_id DESC). The listing endpoint returns active resources for one tenant, newest update first, 50 per page, today with LIMIT 50 OFFSET n. Tenants reach page 400 and rows are created while they read. Write the keyset query, define what the cursor carries and how it is encoded, and say which part of the index each predicate uses. Assume PostgreSQL 16.
Approach
- Name the two failures separately. OFFSET 20000 makes the server produce and discard 20,000 rows, so page cost grows with depth rather than with page size. Independently, any write that changes how many rows sort above the offset moves the window between two fetches, and the direction decides which anomaly you get: an insert lands at the head of updated_at DESC and pushes already-returned rows down past the boundary, so they are returned a second time; a delete above the offset, or a row whose updated_at is bumped above the cursor, pulls rows up and one is never returned at all. Nothing in the response reveals either.
- Write the seek: WHERE tenant_id = $1 AND status = 'active' AND (updated_at, resource_id) < ($2, $3) ORDER BY updated_at DESC, resource_id DESC LIMIT 50. The row-value comparison is one index range rather than a disjunction, and both columns are NOT NULL, which is what makes that comparison well defined.
- Map each predicate onto the index: tenant_id and status are equality on the leading columns, (updated_at, resource_id) is the range, and the ORDER BY matches the index order so no Sort node appears and the scan stops after 50 rows. The DESC in the definition only matters for mixed directions — a plain ascending btree on the same columns is read backwards for this query.
- Put both sort columns in the cursor and nothing the client can tamper with into another tenant: base64 of (updated_at, resource_id), validated server-side, with tenant_id taken from the principal.
Follow-up
- The client asks for 'jump to page 400'. What do you offer instead, and what does the honest version cost?
- Sort order becomes user-selectable across four columns. How many indexes is that, and which would you refuse to add?
Stop tag and share joins from fanning out a page
resource_tag is (resource_id, tag_id) with PK (resource_id, tag_id); resource_share is (resource_id, shared_with_user_id, permission). The tagged-and-shared listing inner-joins resource to both, filters tenant_id, tag_id = ANY($2) and shared_with_user_id = $3, orders by updated_at DESC and takes 50. Pages come back with fewer than 50 distinct resources and the total in the header is far too high. Explain the row multiplication, rewrite both the page query and the count query so each is correct, and name the index each one needs. PostgreSQL 16.
Approach
- Do the arithmetic against the predicates that are actually there. An inner join emits one row per matching child row, and both joins are filtered: tag_id = ANY($2) admits only the requested tags, shared_with_user_id = $3 admits one user's share rows. So a resource holding three of the requested tags and shared with $3 once yields three rows, not one — the multiplier is its count of matching tags times its share rows for that single user, and that second factor is 1 unless the table admits duplicate (resource_id, shared_with_user_id) pairs. LIMIT 50 then limits rows rather than resources, and COUNT(*) counts pairs — the header is the product, not the population.
- Reject DISTINCT as the fix. It deduplicates after the product has been built, so the planner must materialise and sort the fanned-out set before the LIMIT can apply, and it leaves any SUM or AVG in the same select list wrong.
- Rewrite both filters as semi-joins, keeping resource as the only row source: AND EXISTS (SELECT 1 FROM resource_tag rt WHERE rt.resource_id = r.resource_id AND rt.tag_id = ANY($2)) and the same shape against resource_share. A semi-join stops at the first match per resource and preserves the driving index order, so ORDER BY updated_at DESC, resource_id DESC LIMIT 50 still stops after 50 rows.
- Count with the same predicates and no join at all: SELECT count(*) FROM resource r WHERE r.tenant_id = $1 AND r.status = 'active' AND EXISTS (...) AND EXISTS (...). Nothing multiplies a resource, so the number is the population.
Follow-up
- The filter changes from 'any of these tags' to 'all of these tags'. Rewrite it and state what it costs relative to the ANY form.
- A resource can be shared with the same user twice under different permissions. Does your count change, and should it?
How do you ensure high availability and reliability in your software deployments?
How do you ensure high availability and reliability in your software deployments?
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?
Explain the importance of data integrity in a manufacturing environment.
Explain the importance of data integrity in a manufacturing environment.
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 do you approach optimizing code for performance in a resource-constrained environment?
How do you approach optimizing code for performance in a resource-constrained environment?
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 is your approach to debugging complex distributed systems?
What is your approach to debugging complex distributed systems?
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?
Describe a situation where you had to troubleshoot an issue with limited documentation.
Describe a situation where you had to troubleshoot an issue with limited documentation.
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 TSMC candidates report.
Prepare, practise & reflect
One practical outcome each day. Spend longer where you need it.
0 / 7 done01Map the TSMC loop
- Write out the reported sequence: Technical Screening, Technical Deep-Dive, Cultural Alignment Discussion, Final Decision.
- 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 4 reported rounds, with the weakest marked.
02Work AMHS (Automated Material Handling Systems)
- Spend the session on AMHS (Automated Material Handling Systems), which TSMC candidates report being tested on.
- Write one worked example in AMHS (Automated Material Handling Systems) and time yourself on it.
Deliverable: One timed worked example in AMHS (Automated Material Handling Systems).
03Work Chemical Analysis (Domain Concepts)
- Spend the session on Chemical Analysis (Domain Concepts), which TSMC candidates report being tested on.
- Write one worked example in Chemical Analysis (Domain Concepts) and time yourself on it.
Deliverable: One timed worked example in Chemical Analysis (Domain Concepts).
04Work Quality Engineering
- Spend the session on Quality Engineering, which TSMC candidates report being tested on.
- Write one worked example in Quality Engineering and time yourself on it.
Deliverable: One timed worked example in Quality Engineering.
05Answer out loud: Technical & Domain Knowledge
- Answer aloud, timed: Describe your experience with real-time systems or automated material handling software.
- Answer aloud, timed: How do you ensure high availability and reliability in your software deployments?
Deliverable: Spoken answers to 2 reported Technical & Domain Knowledge question(s), under time.
06Answer out loud: Problem-Solving & Logical Thinking
- Answer aloud, timed: Walk me through a time you identified a bottleneck in a system and how you resolved it.
- Answer aloud, timed: How do you prioritize tasks when faced with conflicting project requirements?
Deliverable: Spoken answers to 2 reported Problem-Solving & Logical Thinking question(s), under time.
07Answer out loud: Behavioral & Cultural Fit
- Answer aloud, timed: Why do you want to work for TSMC specifically?
- Answer aloud, timed: Describe a time you had to work with a cross-functional team to achieve a goal.
Deliverable: Spoken answers to 2 reported Behavioral & Cultural Fit 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 your experience with real-time systems or automated material handling software.
Describe your experience with real-time systems or automated material handling software.
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 handle hardware-software integration challenges?
How do you handle hardware-software integration challenges?
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?
Walk me through a time you identified a bottleneck in a system and how you resolved it.
Walk me through a time you identified a bottleneck in a system and how you resolved 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?
How do you prioritize tasks when faced with conflicting project requirements?
How do you prioritize tasks when faced with conflicting project requirements?
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?
Why do you want to work for TSMC specifically?
Why do you want to work for TSMC specifically?
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?
Describe a time you had to work with a cross-functional team to achieve a goal.
Describe a time you had to work with a cross-functional team to achieve a goal.
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 handle feedback from stakeholders or managers regarding your technical designs?
How do you handle feedback from stakeholders or managers regarding your technical designs?
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?
Tell me about a time you had to adapt to a major change in project direction.
Tell me about a time you had to adapt to a major change in project direction.
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 your experience with real-time systems or automated material handling software.
- 02
How do you handle hardware-software integration challenges?
- 03
Walk me through a time you identified a bottleneck in a system and how you resolved it.
- 04
How do you prioritize tasks when faced with conflicting project requirements?
How long does the hiring process typically take?
The process can vary, but generally, you can expect a few weeks from the initial screen to a final decision. We recommend staying responsive to emails from the recruiting team to keep the momentum going.
TSMC Software Engineer candidate reports ↗Is the technical interview focused on whiteboard coding or system design?
Expect a mix of both. You will likely be asked to solve specific coding challenges to test your logic, followed by discussions on how you would architect a solution for a real-world manufacturing problem.
TSMC Software Engineer candidate reports ↗What is the most important trait for a candidate to demonstrate?
Reliability. We look for engineers who take ownership of their code and understand the impact of their work on the broader manufacturing process.
TSMC Software Engineer candidate reports ↗What topics does TSMC test in interviews?
TSMC interviews most often cover AMHS (Automated Material Handling Systems), Behavioral Interviewing, Communication Skills, Problem Solving, and Technical Communication. The exact emphasis depends on the specific role you apply for.
TSMC Software Engineer candidate reports ↗Sources & methodology 3 sources ↗
No official company page is cited. Rounds and questions come from candidate reports and PracHub editorial material; each source shows the date it was read.
- 01TSMC Software Engineer candidate reports ↗
Company-reported rounds, questions and FAQ.
Candidate reports · Accessed 2026-09-22 - 02PracHub Software Engineer practice ↗
PracHub practice material, not company-reported.
PracHub page · Accessed 2026-09-22 - 03PracHub preparation framework ↗
PracHub preparation guidance.
PracHub page · Accessed 2026-09-22
Explore related engineering environments and compare the preparation focus.
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