The Software Engineer role at Midwest Employers Casualty is pivotal in developing and maintaining software solutions that enhance the efficiency and effectiveness of the organization’s operations. Your contributions will have a direct impact on a wide array of products that serve clients throughout the Midwest. In this role, you will be expected to tackle complex challenges in the insurance industry, designing systems that improve user experiences and streamline processes. As a Software Engineer, you will work on a range of projects that may include building internal tools, automating workflows, and enhancing client-facing applications. This position requires a keen understanding of technology and business needs, making it a critical part of transforming ideas into functional software that meets the strategic goals of Midwest Employers Casualty. Expect to collaborate with cross-functional teams, enabling you to influence the direction of software development initiatives and contribute to the overall success of the organization.
Initial Phone Screen
reportedCandidates typically start with an initial phone screen to discuss their background and qualifications.
What to demonstrate
- Candidates typically start with an initial phone screen to discuss their background and qualifications
- Depth in Professional Communication
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.
Technical Assessment
reportedThis may include coding tests and additional interviews via video conferencing to evaluate technical skills.
What to demonstrate
- This may include coding tests and additional interviews via video conferencing to evaluate technical skills
- Depth in Professional Communication
How to prepare
- Answer aloud and timed: How do you approach debugging a complex software issue?
- Answer aloud and timed: Can you explain the differences between relational and non-relational databases?
PracHub editorial advice for the preparation topics above.
Understand the Company Culture
Familiarize yourself with the values and mission of Midwest Employers Casualty. This understanding will help you align your answers to demonstrate cultural fit.
Be Prepared to Discuss Your Projects
Think about specific projects you have worked on and be ready to discuss the challenges faced and how you overcame them.
Practice Coding
Utilize platforms like LeetCode or HackerRank to refine your coding skills, as technical assessments are a key part of the interview process.
Ask Insightful Questions
Prepare thoughtful questions to ask your interviewers. This shows your genuine interest in the role and the organization.
Choose a category, try a prompt, then open its approach, worked solution or follow-up when you need it.
Write a function to reverse a string.
Write a function to reverse a string.
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 implement a binary search algorithm?
How would 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?
Can you explain the concept of Big O notation and provide examples?
Can you explain the concept of Big O notation and provide examples?
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 code to merge two sorted arrays into a single sorted array.
Write code to merge two sorted arrays into a single sorted 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?
Explain why the owner filter ignores the listing index
The only index on resource is (tenant_id, status, updated_at DESC, resource_id DESC). A new endpoint returns one user's resources across all statuses, newest created first: WHERE tenant_id = $1 AND owner_user_id = $2 ORDER BY created_at DESC LIMIT 20. On a tenant with 2M rows it takes 900 ms and EXPLAIN shows a sort above a large scan. Explain precisely why the existing index cannot serve it, give the index that can, and state which of these the new index still will not help: owner_user_id alone across tenants; the same query ordered by updated_at. PostgreSQL 16.
Approach
- Separate the two jobs an index does. For filtering, a composite btree is seekable only on a left prefix, so with no predicate on status the scan can at best range over tenant_id and test owner_user_id per row; PostgreSQL 16 has no btree skip scan to jump the unconstrained column.
- For ordering, the index is sorted by (status, updated_at) within a tenant and not by created_at, so the LIMIT cannot stop early: every matching row is read and then sorted. That is the 'Sort Method: top-N heapsort' line, and it is why the plan reads 2M rows to answer with 20.
- Derive the replacement from the access path — equality, equality, then the ordering column: CREATE INDEX CONCURRENTLY ON resource (tenant_id, owner_user_id, created_at DESC). The scan seeks to the (tenant, owner) range and walks 20 entries in order, so the Sort node disappears along with the row-read.
- Treat INCLUDE (title, status) as conditional, not free. An index-only scan still visits the heap for any row whose page is not marked all-visible, so on a table taking 1.2k writes/second the win depends on autovacuum keeping the visibility map current, and the wider index costs more on every insert.
Follow-up
- 90% of rows are status='active'. Would a partial index WHERE status = 'active' change your answer, and for which of the three queries?
- A dashboard runs this for 40 owners in one page load. What changes about the design?
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?
What programming languages are you most proficient in, and why?
What programming languages are you most proficient in, 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?
Can you explain the differences between relational and non-relational databases?
Can you explain the differences between relational and non-relational databases?
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 design patterns have you utilized in your projects?
What design patterns have you utilized in your projects?
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 challenging technical problem you faced and how you resolved it.
Describe a challenging technical problem you faced and how you resolved 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?
How do you prioritize tasks when working on multiple projects?
How do you prioritize tasks when working on multiple projects?
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?
Given a scenario where a software feature is underperforming, what steps would you take to investigate and rec
Given a scenario where a software feature is underperforming, what steps would you take to investigate and rectify the issue?
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 provide an example of a time you had to learn a new technology quickly? How did you manage it?
Can you provide an example of a time you had to learn a new technology quickly? How did you manage 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?
How do you approach debugging a complex software issue?
How do you approach debugging a complex software issue?
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 Midwest Employers Casualty candidates report.
Prepare, practise & reflect
One practical outcome each day. Spend longer where you need it.
0 / 7 done01Map the Midwest Employers Casualty loop
- Write out the reported sequence: Initial Phone Screen, Technical Assessment.
- 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 2 reported rounds, with the weakest marked.
02Work Professional Communication
- Spend the session on Professional Communication, which Midwest Employers Casualty candidates report being tested on.
- Write one worked example in Professional Communication and time yourself on it.
Deliverable: One timed worked example in Professional Communication.
03Work Interview Preparation
- Spend the session on Interview Preparation, which Midwest Employers Casualty candidates report being tested on.
- Write one worked example in Interview Preparation and time yourself on it.
Deliverable: One timed worked example in Interview Preparation.
04Work Ethics and Appropriate Questioning (Interview Conduct)
- Spend the session on Ethics and Appropriate Questioning (Interview Conduct), which Midwest Employers Casualty candidates report being tested on.
- Write one worked example in Ethics and Appropriate Questioning (Interview Conduct) and time yourself on it.
Deliverable: One timed worked example in Ethics and Appropriate Questioning (Interview Conduct).
05Answer out loud: Technical / Domain Questions
- Answer aloud, timed: What programming languages are you most proficient in, and why?
- Answer aloud, timed: Describe your experience with version control systems.
Deliverable: Spoken answers to 2 reported Technical / Domain Questions question(s), under time.
06Answer out loud: Problem-Solving / Case Studies
- Answer aloud, timed: Describe a challenging technical problem you faced and how you resolved it.
- Answer aloud, timed: How do you prioritize tasks when working on multiple projects?
Deliverable: Spoken answers to 2 reported Problem-Solving / Case Studies question(s), under time.
07Answer out loud: Behavioral / Leadership
- Answer aloud, timed: Describe a situation where you worked as part of a team. What was your role?
- Answer aloud, timed: How do you handle feedback and criticism?
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 your experience with version control systems.
Describe your experience with version control systems.
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 situation where you worked as part of a team. What was your role?
Describe a situation where you worked as part of a team. What was 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?
How do you handle feedback and criticism?
How do you handle feedback and criticism?
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 when you had to influence a decision in a team setting.
Tell me about a time when you had to influence a decision in 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 values do you believe are essential for a successful engineering team?
What values do you believe are essential for a successful engineering team?
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 version control systems.
- 02
Describe a situation where you worked as part of a team. What was your role?
- 03
How do you handle feedback and criticism?
- 04
Tell me about a time when you had to influence a decision in a team setting.
What is the interview difficulty level?
The interview process is moderately challenging, reflecting the technical nature of the role. Candidates should expect to prepare for both technical assessments and behavioral interviews.
Midwest Employers Casualty Software Engineer candidate reports ↗How can I differentiate myself as a candidate?
Successful candidates often demonstrate not just technical expertise but also strong interpersonal skills and a cultural fit with the organization. Sharing specific examples of past experiences can help illustrate your strengths.
Midwest Employers Casualty Software Engineer candidate reports ↗What is the typical timeline from application to offer?
The timeline can vary, but candidates can generally expect a few weeks from the first interview to receiving an offer, depending on the scheduling of interviews and assessments.
Midwest Employers Casualty Software Engineer candidate reports ↗Is remote work an option for this role?
While specifics can vary, many roles at Midwest Employers Casualty offer flexibility in work arrangements, including remote or hybrid options.
Midwest Employers Casualty Software Engineer candidate reports ↗What are the company values, and how do they influence the work environment?
Midwest Employers Casualty values integrity, collaboration, and customer focus. These principles guide team dynamics and decision-making processes.
Midwest Employers Casualty Software Engineer candidate reports ↗What topics does Midwest Employers Casualty test in interviews?
Midwest Employers Casualty interviews most often cover Behavioral Interviewing, Professional Communication, Question Answering / Verbal Communication, Interview Preparation, and HR Screening Competencies. The exact emphasis depends on the specific role you apply for.
Midwest Employers Casualty 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.
- 01Midwest Employers Casualty 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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