As a Software Engineer at Unum, you play a pivotal role in shaping the technology solutions that empower our clients and enhance our products. This position is crucial to delivering high-quality software that meets the needs of our users and drives the overall success of our business. You will contribute to the development and maintenance of systems that manage insurance and employee benefits, ensuring that our solutions are reliable, efficient, and user-friendly. In this role, you will collaborate with cross-functional teams to tackle complex technical challenges and deliver innovative solutions. Your work will directly impact the user experience and the operational efficiency of our products, allowing Unum to maintain its competitive edge in the insurance industry. You can expect to engage with various technologies and methodologies, making this position both dynamic and rewarding. Here, you will not only strengthen your technical skills but also have the opportunity to influence the strategic direction of our software initiatives.
Phone Screen
reportedInitial phone call to evaluate your background and fit for the role.
What to demonstrate
- Initial phone call to evaluate your background and fit for the role
- Depth in SQL
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
reportedAssessment may include coding challenges or case studies to evaluate technical skills.
What to demonstrate
- Assessment may include coding challenges or case studies to evaluate technical skills
- Depth in SQL
How to prepare
- Answer aloud and timed: Can you explain how you would optimize a database query?
- Answer aloud and timed: Walk us through your process for debugging a complex application.
Collaborative Interviews
reportedInterviews focusing on real-world scenarios and problem-solving in a collaborative environment.
What to demonstrate
- Interviews focusing on real-world scenarios and problem-solving in a collaborative environment
- Depth in SQL
How to prepare
- Answer aloud and timed: What design patterns do you commonly use, and why?
- Answer aloud and timed: Tell me about a time you had to work under a tight deadline. How did you manage your time?
PracHub editorial advice for the preparation topics above.
Showcase your projects
Be prepared to discuss specific projects you have worked on, including challenges faced and solutions implemented. This demonstrates your practical experience.
Align with company values
Familiarize yourself with Unum’s core values and be ready to articulate how your personal and professional ethos aligns with them.
Practice the STAR method
When answering behavioral questions, use the STAR method to structure your responses clearly and effectively.
Ask insightful questions
Prepare thoughtful questions for your interviewers that reflect your understanding of the role and the company, showing your genuine interest in the position.
Choose a category, try a prompt, then open its approach, worked solution or follow-up when you need it.
Write a function that reverses a string. Explain your approach.
Write a function that reverses a string. Explain your approach.
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 search algorithm? Discuss its time complexity.
How would you implement a search algorithm? Discuss its time complexity.
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?
Given a dataset, how would you identify and handle missing values?
Given a dataset, how would you identify and handle missing values?
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 differences between stack and queue data structures?
Can you explain the differences between stack and queue data structures?
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 how you would optimize a database query?
Can you explain how you would optimize a database query?
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?
Write a SQL query to join two tables and retrieve specific data.
Write a SQL query to join two tables and 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?
Describe a challenging technical problem you've encountered and how you resolved it.
Describe a challenging technical problem you've encountered 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?
What design patterns do you commonly use, and why?
What design patterns do you commonly use, 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?
If you were tasked with improving the performance of an existing application, what steps would you take?
If you were tasked with improving the performance of an existing application, what steps would you take?
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 approach designing a new feature for an existing product?
How would you approach designing a new feature for an existing 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?
Describe how you would handle a sudden requirement change during the development phase.
Describe how you would handle a sudden requirement change during the development phase.
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 strategies would you implement to ensure code quality and maintainability?
What strategies would you implement to ensure code quality and maintainability?
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 your approach to testing and validating software?
Can you explain your approach to testing and validating software?
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?
Walk us through your process for debugging a complex application.
Walk us through your process for debugging a complex application.
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 Unum candidates report.
Prepare, practise & reflect
One practical outcome each day. Spend longer where you need it.
0 / 7 done01Map the Unum loop
- Write out the reported sequence: Phone Screen, Technical Assessment, Collaborative Interviews.
- 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 SQL
- Spend the session on SQL, which Unum candidates report being tested on.
- Write one worked example in SQL and time yourself on it.
Deliverable: One timed worked example in SQL.
03Work JavaScript
- Spend the session on JavaScript, which Unum candidates report being tested on.
- Write one worked example in JavaScript and time yourself on it.
Deliverable: One timed worked example in JavaScript.
04Work Query Writing / Database Querying
- Spend the session on Query Writing / Database Querying, which Unum candidates report being tested on.
- Write one worked example in Query Writing / Database Querying and time yourself on it.
Deliverable: One timed worked example in Query Writing / Database Querying.
05Answer out loud: Technical / Domain Questions
- Answer aloud, timed: Describe a challenging technical problem you've encountered and how you resolved it.
- Answer aloud, timed: What is your experience with Java, SQL, or other programming languages relevant to this position?
Deliverable: Spoken answers to 2 reported Technical / Domain Questions question(s), under time.
06Answer out loud: Behavioral / Leadership
- Answer aloud, timed: Tell me about a time you had to work under a tight deadline. How did you manage your time?
- Answer aloud, timed: Describe a situation where you had a conflict with a team member. How did you handle it?
Deliverable: Spoken answers to 2 reported Behavioral / Leadership question(s), under time.
07Answer out loud: Problem-Solving / Case Studies
- Answer aloud, timed: If you were tasked with improving the performance of an existing application, what steps would you take?
- Answer aloud, timed: How would you approach designing a new feature for an existing product?
Deliverable: Spoken answers to 2 reported Problem-Solving / Case Studies 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.
What is your experience with Java, SQL, or other programming languages relevant to this position?
What is your experience with Java, SQL, or other programming languages relevant to this position?
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 work under a tight deadline. How did you manage your time?
Tell me about a time you had to work under a tight deadline. How did you manage your time?
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 had a conflict with a team member. How did you handle it?
Describe a situation where you had a conflict with a team member. 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?
What motivates you to produce your best work?
What motivates you to produce your best work?
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?
Give an example of a time when you took the lead on a project.
Give an example of a time when you took the lead on a project.
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
What is your experience with Java, SQL, or other programming languages relevant to this position?
- 02
Tell me about a time you had to work under a tight deadline. How did you manage your time?
- 03
Describe a situation where you had a conflict with a team member. How did you handle it?
- 04
What motivates you to produce your best work?
How difficult are the interviews at Unum?
The interviews are generally considered to be challenging but fair, focusing on both technical and behavioral aspects. Candidates often report that thorough preparation can significantly enhance their performance.
Unum Software Engineer candidate reports ↗What differentiates successful candidates?
Successful candidates typically demonstrate a strong grasp of technical concepts, effective problem-solving skills, and the ability to communicate clearly. Additionally, alignment with Unum’s values and culture is crucial.
Unum Software Engineer candidate reports ↗What is the typical timeline from initial screen to offer?
The timeline can vary but generally takes a few weeks, including multiple interview stages. Candidates should stay in communication with their recruiters for updates.
Unum Software Engineer candidate reports ↗Are remote work or hybrid expectations common?
While some roles may offer remote or hybrid work options, specifics can vary by team and position. It's best to inquire during the interview process.
Unum Software Engineer candidate reports ↗What is the company culture like at Unum?
Unum promotes a collaborative and inclusive culture, focusing on innovation, integrity, and customer-centric solutions. Employees are encouraged to be proactive and contribute ideas.
Unum Software Engineer candidate reports ↗What topics does Unum test in interviews?
Unum interviews most often cover SQL, Problem Solving, Behavioral Interviewing, Data Analysis, and Process Improvement. The exact emphasis depends on the specific role you apply for.
Unum 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.
- 01Unum 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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