A Software Engineer at Delaware North plays a pivotal role in shaping the technology landscape within the organization. This position is integral to developing and maintaining systems that enhance operational efficiency and improve the customer experience across various segments, including hospitality, sports, and entertainment. Your contributions will directly impact how end-users interact with our products and services, making this role both essential and rewarding. As a Software Engineer, you will work on complex projects that involve designing scalable applications and systems that handle vast amounts of data. You will collaborate with cross-functional teams to ensure that our technology solutions align with our business goals and user needs. This role offers the unique opportunity to influence the development of innovative solutions that enhance the guest experience, streamline operations, and drive strategic initiatives across the organization. Expect to engage in a dynamic environment where your technical skills will not only be challenged but expanded. You will be part of a team that is focused on leveraging technology to solve real-world problems, making your role critical in the ongoing success and growth of. Delaware North
Phone Screen
reportedInitial phone screen with a recruiter to assess background and role fit.
What to demonstrate
- Initial phone screen with a recruiter to assess background and role fit
- Depth in Workday Integrations
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 Interviews
reportedSeveral interviews with different stakeholders focusing on technical assessments.
What to demonstrate
- Several interviews with different stakeholders focusing on technical assessments
- Depth in Workday Integrations
How to prepare
- Answer aloud and timed: Describe a time when you optimized a piece of code. What was the outcome?
- Answer aloud and timed: How do you approach debugging a complex issue in your code?
Behavioral Interviews
reportedInterviews aimed at understanding cultural fit and past experiences.
What to demonstrate
- Interviews aimed at understanding cultural fit and past experiences
- Depth in Workday Integrations
How to prepare
- Prepare three examples from your own work, each with a decision you made and an outcome you can quantify.
- Re-read the description of the behavioral interviews above and write down what you would ask to confirm before it.
Senior Leadership Discussion
reportedDiscussion with senior leadership, including the CIO, to evaluate alignment with company values.
What to demonstrate
- Discussion with senior leadership
- Including the CIO, to evaluate alignment with company values
How to prepare
- Answer aloud and timed: How do you prioritize tasks when working on multiple projects?
- Answer aloud and timed: Give an example of how you resolved a conflict within your team.
PracHub editorial advice for the preparation topics above.
Research the Company
Familiarize yourself with Delaware North’s mission, values, and recent projects to demonstrate your genuine interest during interviews.
Practice Coding
Engage in coding challenges on platforms like LeetCode or HackerRank to sharpen your skills and prepare for technical assessments.
Prepare Your Stories
Use the STAR (Situation, Task, Action, Result) method to craft compelling stories that illustrate your experience and problem-solving abilities.
Be Yourself
While technical skills are essential, being authentic and showing your personality will help you connect with interviewers.
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 linked list.
Write a function to reverse a linked list.
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 the time complexity of your solution.
Explain the time complexity of your solution.
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 to find an element in a sorted array?
How would you implement a search algorithm to find an element in a 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?
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?
Find version gaps and relay lag with window functions
outbox_event holds event_id, aggregate_type, aggregate_id, aggregate_version, event_type, payload, status ('pending','published','dead'), attempts, created_at, published_at. A projection is missing rows and you must decide whether the relay skipped events or the consumer dropped them. Write three queries over the last seven days: one listing every aggregate_id whose published aggregate_version sequence has a hole, one giving per-day counts with a running total, and one returning the newest published event per aggregate. For each, say where the window function is evaluated relative to WHERE and LIMIT. PostgreSQL 16.
Approach
- Gaps: compute lead(aggregate_version) OVER (PARTITION BY aggregate_id ORDER BY aggregate_version) in a subquery, then filter next_version <> aggregate_version + 1 in the outer query. Window functions are evaluated after WHERE, GROUP BY and HAVING and before the outer ORDER BY and LIMIT, so the predicate cannot sit in the same WHERE clause and PostgreSQL 16 has no QUALIFY.
- Say what the seven-day filter does to the answer: it truncates every partition, so the first row per aggregate has no predecessor inside the window and a hole spanning the boundary is invisible. Widen the window, or join to resource.version as the authority for the true maximum.
- Running total: SELECT date_trunc('day', created_at) AS d, count() AS n, sum(count()) OVER (ORDER BY date_trunc('day', created_at) ROWS UNBOUNDED PRECEDING). An aggregate inside a window call is legal because grouping runs before windowing. The grouping key is unique per row here so ROWS and RANGE agree, but write the frame anyway — over ungrouped rows with tied timestamps the default RANGE frame pulls in every peer row and the total jumps.
- Newest per aggregate: DISTINCT ON (aggregate_id) ... ORDER BY aggregate_id, aggregate_version DESC is the cheap PostgreSQL-only form when an index matches that order; row_number() OVER (PARTITION BY aggregate_id ORDER BY aggregate_version DESC) = 1 is the portable form and needs a subquery for the same evaluation-order reason as the gap query.
Follow-up
- Relay failover redelivers events. Does a duplicate break the gap query, and how would you detect one from this table alone?
- Turn the gap check into a continuous monitor rather than a query someone runs after an incident. What does it watch?
What programming languages are you most comfortable with, and why?
What programming languages are you most comfortable with, 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 concept of object-oriented programming?
Can you explain the concept of object-oriented programming?
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 are the principles of RESTful API design?
What are the principles of RESTful API design?
Approach
- Say who the caller is and what they do when the call fails halfway.
- Define the identity of a request so a retry cannot double-apply it.
- Separate accepted, pending, failed and confirmed; they are different facts.
- Design the error taxonomy before the success shape; callers branch on it.
Follow-up
- What happens if the caller retries after a timeout?
- How does a client discover it is on an old version of this contract?
How would you approach designing a new feature for an existing application?
How would you approach designing a new feature for an existing application?
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 given a dataset, how would you identify patterns or insights?
If given a dataset, how would you identify patterns or insights?
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 your thought process when faced with a technical decision that could impact the project's timeline.
Describe your thought process when faced with a technical decision that could impact the project's timeline.
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 issue in your code?
How do you approach debugging a complex issue in your code?
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 Delaware North candidates report.
Prepare, practise & reflect
One practical outcome each day. Spend longer where you need it.
0 / 7 done01Map the Delaware North loop
- Write out the reported sequence: Phone Screen, Technical Interviews, Behavioral Interviews, Senior Leadership Discussion.
- 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 Workday Integrations
- Spend the session on Workday Integrations, which Delaware North candidates report being tested on.
- Write one worked example in Workday Integrations and time yourself on it.
Deliverable: One timed worked example in Workday Integrations.
03Work Enterprise Data Management
- Spend the session on Enterprise Data Management, which Delaware North candidates report being tested on.
- Write one worked example in Enterprise Data Management and time yourself on it.
Deliverable: One timed worked example in Enterprise Data Management.
04Work IT Application Configuration
- Spend the session on IT Application Configuration, which Delaware North candidates report being tested on.
- Write one worked example in IT Application Configuration and time yourself on it.
Deliverable: One timed worked example in IT Application Configuration.
05Answer out loud: Technical / Domain Questions
- Answer aloud, timed: What programming languages are you most comfortable with, and why?
- Answer aloud, timed: Can you explain the concept of object-oriented programming?
Deliverable: Spoken answers to 2 reported Technical / Domain Questions question(s), under time.
06Answer out loud: Behavioral / Leadership
- Answer aloud, timed: Describe a challenging project you worked on. What was your role, and what did you learn?
- Answer aloud, timed: How do you prioritize tasks when working on multiple projects?
Deliverable: Spoken answers to 2 reported Behavioral / Leadership question(s), under time.
07Answer out loud: Problem-solving / Case Studies
- Answer aloud, timed: How would you approach designing a new feature for an existing application?
- Answer aloud, timed: If given a dataset, how would you identify patterns or insights?
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.
Describe a time when you optimized a piece of code. What was the outcome?
Describe a time when you optimized a piece of code. What was the outcome?
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 challenging project you worked on. What was your role, and what did you learn?
Describe a challenging project you worked on. What was your role, and what did you learn?
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 how you resolved a conflict within your team.
Give an example of how you resolved a conflict within your 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?
How do you stay motivated when faced with difficult challenges?
How do you stay motivated when faced with difficult 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?
Discuss a time when you had to advocate for a technical solution you believed in.
Discuss a time when you had to advocate for a technical solution you believed in.
Approach
- Pick a story where you made the decision, not one where you watched it.
- State the situation in two sentences and spend the rest on the reasoning.
- Give the blast radius: what could have broken, and what you measured.
- Name the disagreement and how you resolved it with evidence.
Follow-up
- What would you do differently if you ran that again?
- How did you know your change caused the improvement?
- 01
Describe a time when you optimized a piece of code. What was the outcome?
- 02
Describe a challenging project you worked on. What was your role, and what did you learn?
- 03
How do you prioritize tasks when working on multiple projects?
- 04
Give an example of how you resolved a conflict within your team.
What is the typical difficulty level of the interviews?
The interviews for the Software Engineer position at Delaware North are generally considered moderate in difficulty. Candidates should expect a combination of technical and behavioral questions, but the focus is more on assessing fit and collaboration rather than solely technical prowess.
Delaware North Software Engineer candidate reports ↗How long does the interview process usually take?
The full interview process can span several weeks, from the initial phone screen to the final decision. It’s essential to remain patient and proactive throughout this time.
Delaware North Software Engineer candidate reports ↗What differentiates successful candidates?
Successful candidates typically demonstrate a strong technical foundation, effective communication skills, and a clear alignment with Delaware North’s values and culture. Be prepared to showcase examples of your work and how you collaborate with others.
Delaware North Software Engineer candidate reports ↗What is the company culture like at Delaware North?
Delaware North prides itself on a collaborative and inclusive culture. Employees are encouraged to share ideas and work together to drive innovation and excellence in service.
Delaware North Software Engineer candidate reports ↗Are there opportunities for remote work?
While many roles at Delaware North may offer hybrid working arrangements, it is advisable to confirm remote work policies specific to the Software Engineer position during your interview.
Delaware North Software Engineer candidate reports ↗What topics does Delaware North test in interviews?
Delaware North interviews most often cover SQL, Stakeholder Management, Tableau, Data Visualization, and Requirements Gathering. The exact emphasis depends on the specific role you apply for.
Delaware North 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.
- 01Delaware North 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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