At SoftTech Engineers, the Software Engineer role is central to the development, implementation, and maintenance of complex software solutions that drive our business forward. You will be responsible for the full software development lifecycle, from analyzing requirements and coding to testing and deploying high-quality applications. This role requires a balance of analytical precision and creative problem-solving to ensure our technical infrastructure remains robust and scalable. You will work closely with cross-functional teams, including project managers and senior leads, to translate business needs into technical reality. Whether you are working on structural engineering software or general enterprise applications, your contributions will directly influence the efficiency and reliability of the tools our clients depend on. This position offers the opportunity to tackle diverse technical challenges in an environment that values both theoretical knowledge and practical execution.
Foundational Skills Assessment
reportedInitial evaluation of your basic technical skills relevant to the position.
What to demonstrate
- Initial evaluation of your basic technical skills relevant to the position
- Depth in C++
How to prepare
- Answer aloud and timed: Explain the principles of OOP (Object-Oriented Programming) and provide examples of how you have applied them in your previous projects.
- Answer aloud and timed: Can you explain the difference between TFS and VSS?
Technical Discussions
reportedIn-depth conversations about your technical expertise and contributions to projects.
What to demonstrate
- In-depth conversations about your technical expertise and contributions to projects
- Depth in C++
How to prepare
- Answer aloud and timed: What are the common pitfalls when working with C++ memory management?
- Answer aloud and timed: How do you approach error handling in.NET or Java?
Cultural Fit Evaluation
reportedAssessment of alignment with company culture and long-term career goals.
What to demonstrate
- Assessment of alignment with company culture and long-term career goals
- Depth in C++
How to prepare
- Answer aloud and timed: Explain the basic structure and usage of HTML tags like
<table>and<div>. - Answer aloud and timed: Walk me through the most challenging project you have worked on and your specific role in its success.
PracHub editorial advice for the preparation topics above.
Own your projects
Be prepared to explain every line of code or architectural decision in the projects listed on your resume.
Be ready for technical tests
Whether it is a pen-and-paper test or a live coding session, stay calm and focus on structured, clean code.
Ask questions
At the end of your interview, ask insightful questions about the team’s current tech stack or the biggest challenges they are facing.
Value your worth
During HR discussions, be clear about your compensation expectations and ensure you understand the full breakdown of fixed and variable components.
Choose a category, try a prompt, then open its approach, worked solution or follow-up when you need it.
Explain the principles of OOP (Object-Oriented Programming) and provide examples of how you have applied them
Explain the principles of OOP (Object-Oriented Programming) and provide examples of how you have applied them in your previous projects.
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 difference between TFS and VSS?
Can you explain the difference between TFS and VSS?
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?
What are the common pitfalls when working with C++ memory management?
What are the common pitfalls when working with C++ 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?
How do you approach error handling in.NET or Java?
How do you approach error handling in.NET or Java?
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?
Explain the basic structure and usage of HTML tags like `<table>` and `<div>`.
Explain the basic structure and usage of HTML tags like <table> and <div>.
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?
Given an SQL query scenario on an 'Employee' table, how would you structure the join to retrieve specific data
Given an SQL query scenario on an 'Employee' table, how would you structure the join to retrieve specific data?
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?
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?
Walk me through the most challenging project you have worked on and your specific role in its success.
Walk me through the most challenging project you have worked on and your specific role in its success.
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 did you optimize your code to handle the performance requirements of your college project?
How did you optimize your code to handle the performance requirements of your college project?
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 ensure your code is maintainable and scalable?
How do you ensure your code is maintainable and scalable?
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?
What was the most significant technical decision you made in your last role, and why?
What was the most significant technical decision you made in your last role, and why?
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 solving a quantitative or logical reasoning problem within a strict time limit?
How do you approach solving a quantitative or logical reasoning problem within a strict time limit?
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?
Can you predict the output of this code snippet and identify any potential errors?
Can you predict the output of this code snippet and identify any potential errors?
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?
Describe a situation where you had to debug a complex issue in a production environment.
Describe a situation where you had to debug a complex issue in a production environment.
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 SoftTech Engineers candidates report.
Prepare, practise & reflect
One practical outcome each day. Spend longer where you need it.
0 / 7 done01Map the SoftTech Engineers loop
- Write out the reported sequence: Foundational Skills Assessment, Technical Discussions, Cultural Fit Evaluation.
- 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 3 reported rounds, with the weakest marked.
02Work C++
- Spend the session on C++, which SoftTech Engineers candidates report being tested on.
- Write one worked example in C++ and time yourself on it.
Deliverable: One timed worked example in C++.
03Work Object-Oriented Programming (OOP)
- Spend the session on Object-Oriented Programming (OOP), which SoftTech Engineers candidates report being tested on.
- Write one worked example in Object-Oriented Programming (OOP) and time yourself on it.
Deliverable: One timed worked example in Object-Oriented Programming (OOP).
04Work SQL (querying databases)
- Spend the session on SQL (querying databases), which SoftTech Engineers candidates report being tested on.
- Write one worked example in SQL (querying databases) and time yourself on it.
Deliverable: One timed worked example in SQL (querying databases).
05Answer out loud: Technical Fundamentals and Language Proficiency
- Answer aloud, timed: Explain the principles of OOP (Object-Oriented Programming) and provide examples of how you have applied them in your previous projects.
- Answer aloud, timed: Can you explain the difference between TFS and VSS?
Deliverable: Spoken answers to 2 reported Technical Fundamentals and Language Proficiency question(s), under time.
06Answer out loud: Project Experience and Practical Application
- Answer aloud, timed: Walk me through the most challenging project you have worked on and your specific role in its success.
- Answer aloud, timed: How did you optimize your code to handle the performance requirements of your college project?
Deliverable: Spoken answers to 2 reported Project Experience and Practical Application question(s), under time.
07Answer out loud: Aptitude and Problem-Solving
- Answer aloud, timed: How do you approach solving a quantitative or logical reasoning problem within a strict time limit?
- Answer aloud, timed: Given an SQL query scenario on an 'Employee' table, how would you structure the join to retrieve specific data?
Deliverable: Spoken answers to 2 reported Aptitude and Problem-Solving 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.
Argue against a design, lose, and commit anyway
Describe a design you argued against and lost. State the failure you predicted as a named mechanism, not a feeling about complexity: two services that would need one transaction, a projection with no rebuild path, a write path with no idempotency key. Say what evidence you brought, what the decision maker weighed instead, and what you did after the decision was made: what you instrumented, what you wrote down, and whether the prediction came true. Five minutes.
Approach
- State the prediction in falsifiable form up front: the mechanism, the condition that triggers it, and the observable outcome. A prediction that cannot be checked also cannot be credited to you later.
- Show the evidence you had at the time and label each piece honestly as measured, analogous, or intuition. Keeping the intuition is fine; disguising it as data is the thing that erodes your standing in the next argument.
- Represent the opposing case at full strength, including the constraint you did not control: a fixed date, a team boundary, or the fact that the decision was cheap to reverse and yours was not.
- Make disagree-and-commit concrete. Name the artefact you left behind so the prediction could be settled without you: the alert and its threshold, the counter on the dashboard, the decision note that recorded the trade-off and the condition that would revisit it.
Follow-up
- What threshold on that alert would have proved you right, and did anyone ever look at it?
- If the same proposal arrived tomorrow with the same deadline, would you argue it the same way?
Unblock an engineer without taking the keyboard
A teammate has spent two days on a job handler that occasionally writes duplicate rows. They are certain the queue is delivering twice by mistake. You suspect a lease expiring under a slow handler, so the job is running concurrently with itself. Describe how you have unblocked someone in this position: what you asked before offering a hypothesis, what you showed them rather than told them, and what you left them owning. Then say what you would do if their theory turned out to be the right one.
Approach
- Ask before diagnosing, and ask for things answerable from data they already have: the attempt count on the job rows that produced duplicates, the handler's observed duration against its lease expiry, and whether the duplicate rows share a natural key that a unique constraint could have caught.
- Teach the shape rather than the answer. A lease cannot distinguish a dead worker from a slow one, so a handler that outruns its lease is running twice by design, and deploys deliver the other half by killing handlers mid-run on every rollout. Both of their candidate theories produce identical duplicate rows, which is why the evidence has to come from timings rather than from argument.
- Hand over a checklist they execute: a natural key on every write the handler performs so the second copy collides rather than appends, the record of intent written before any external effect, a lease heartbeat while running, and the metric that shows it working.
- Keep ownership with them deliberately. Pair on the first write, then step back; if you finish it yourself you have closed one ticket and left the same person stuck on the next redelivery.
Follow-up
- How would you distinguish a genuine double-delivery from a lease expiry using only the data already stored?
- Their handler calls an external endpoint before recording that it did. What do you tell them to change first?
Reverse your own decision and price the reversal
Describe a technical decision you made and later reversed. Pick one that cost something: a service you split and merged back, a cache you added and removed, an index you created that pushed the planner onto a worse plan, a projection you rebuilt from scratch. State what you believed when you decided, the measurement that changed your mind, how long the wrong version ran in production, and what the reversal cost in migrations, dual writes, and a deprecation window for callers you did not own.
Approach
- State the original rationale without irony, in the version you would still defend given what was known then. If it is not defensible, the story is about carelessness rather than judgement, and a different example serves you better.
- Give the measurement that moved with a before and after: the p99 that did not improve, the cache hit rate that sat at 40%, the plan that flipped to a sequential scan once the table passed a size you can name.
- Cost the reversal in steps, not adjectives: expand-and-contract deploys, the dual-write window, the callers who had to be notified, the rows already written in the wrong shape that had to be backfilled or abandoned.
- Distinguish reversal from rewrite by naming what you kept. Most good reversals preserve the schema or the interface and undo one decision inside it, which is also why they were affordable.
Follow-up
- What in that decision was irreversible, and did you know it was irreversible when you made it?
- How did you tell the people who had already built on top of the original decision?
- 01
Describe a design you argued against and lost. State the failure you predicted as a named mechanism, not a feeling about complexity: two services that would need one transaction, a projection with no rebuild path, a write path with no idempotency key. Say what evidence you brought, what the decision maker weighed instead, and what you did after the decision was made: what you instrumented, what you wrote down, and whether the prediction came true. Five minutes.
- 02
A teammate has spent two days on a job handler that occasionally writes duplicate rows. They are certain the queue is delivering twice by mistake. You suspect a lease expiring under a slow handler, so the job is running concurrently with itself. Describe how you have unblocked someone in this position: what you asked before offering a hypothesis, what you showed them rather than told them, and what you left them owning. Then say what you would do if their theory turned out to be the right one.
- 03
Describe a technical decision you made and later reversed. Pick one that cost something: a service you split and merged back, a cache you added and removed, an index you created that pushed the planner onto a worse plan, a projection you rebuilt from scratch. State what you believed when you decided, the measurement that changed your mind, how long the wrong version ran in production, and what the reversal cost in migrations, dual writes, and a deprecation window for callers you did not own.
How long does the entire interview process take?
The duration can vary significantly. While some candidates move through the process in a few weeks, others may experience longer timelines due to scheduling or internal project requirements. We recommend maintaining regular communication with your recruiter for updates.
SoftTech Engineers Software Engineer candidate reports ↗What is the best way to prepare for the aptitude test?
The aptitude rounds focus on quantitative, verbal, and logical reasoning. Practicing standard aptitude problems and ensuring you are comfortable with basic math and logic puzzles will be sufficient to succeed in this stage.
SoftTech Engineers Software Engineer candidate reports ↗Does the company provide feedback if I am not selected?
We aim to provide timely updates to all candidates. If you have not heard back within the expected timeframe, feel free to reach out to your HR contact for a status update. Always ensure your resume is updated to highlight the specific projects you are most proud of, as our interviewers will frequently use your project history as a starting point for technical discussions.
SoftTech Engineers Software Engineer candidate reports ↗What topics does SoftTech Engineers test in interviews?
SoftTech Engineers interviews most often cover C++, BIM (Building Information Modeling), Project Management, Business Analysis, and Object-Oriented Programming (OOP). The exact emphasis depends on the specific role you apply for.
SoftTech Engineers 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.
- 01SoftTech Engineers 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
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