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Practising for the listing Software Engineer, Ads. Its requirements are filled in below. When you have an answer you like, paste it with your CV in Career Mirror to see which of the job's skills it shows.

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Requirements found

Sales Marketing Python (must) Project Management Scheduling

What this posting asks for

Level: Mid level — The posting asks for 3+ years of experience.

Main responsibilities

  • Work with product managers to design and implement Ads products.
  • Collaborate closely with the platform and data teams while building new features.
  • Lead the processes needed to improve operational stability, including improving code quality, delivering dashboards and data visualizations.
  • Build extensible components that would align with the product objectives.
  • Support day to day project management tasks including communicating project updates, managing project timelines and overseeing project execution.
  • 3+ years of software development experience in one or more general purpose programming languages (Java, Scala, Go, C++, Python).
  • Able to take complete ownership of a feature or project.
  • Experience working in the Ads domain
  • Experience or interest in the advertising business and understanding customer needs

Competencies an interviewer will look for

  • Technical skill Core
    In the posting: “Their work includes evolving long-term serving architecture, integrating closely with the ads serving stack, optimizing CPU/GPU performance, and building mod…” · “Languages: Go, Python, Scala” · “Engineers at this level must be able to code independently, but may work with senior engineers on the design of complex solutions.”
    Show it by: Names the tools, languages or systems used and how; Explains a technical choice and its trade-off.
  • Teamwork and collaboration Core
    In the posting: “Our work spans collaboration with product, design, marketing, data science, UX, and sales teams to deliver measurable business outcomes.” · “The Business Manager team stands out for its genuinely inclusive and collaborative culture, where not only is open feedback central, but every opinion and id…” · “From ideation to delivery, our engineers are trusted with end-to-end ownership of their projects, working closely in cross-functional collaboration with PMs,…”
    Show it by: Says what they did inside a team, not only what 'we' did; Shows how a disagreement was handled.
  • Ownership and accountability Core
    In the posting: “From ideation to delivery, our engineers are trusted with end-to-end ownership of their projects, working closely in cross-functional collaboration with PMs,…” · “Engineers at this level must be able to code independently, but may work with senior engineers on the design of complex solutions.” · “The most important skills an engineer at this level must possess are 1) coachability and an eagerness to grow, 2) deep passion for coding, and 3) excellent i…”
    Show it by: Takes a task from start to finish without being chased; Owns a mistake and what was changed after it.
  • Planning and organisation Core
    In the posting: “We prioritize iterative development, rapid shipping, rigorous testing, and building capabilities that create step-change growth.” · “This is a generalist mid-level backend position within the Ads Organization.” · “Family Planning Support”
    Show it by: Shows how priorities were set when everything was urgent; Mentions deadlines met and how.
  • Data and analysis Core
    In the posting: “They focus on attribution systems, identity solutions, and advertiser experimentation tools that improve performance insights and usability.” · “Their goal is to make Reddit’s advertising platform more effective, transparent, and data-driven.” · “Our work spans collaboration with product, design, marketing, data science, UX, and sales teams to deliver measurable business outcomes.”
    Show it by: Uses a number to describe the situation or the result; Explains what the data showed and what was done with it.
  • Attention to detail and quality Core
    In the posting: “Their work includes evolving long-term serving architecture, integrating closely with the ads serving stack, optimizing CPU/GPU performance, and building mod…” · “We prioritize iterative development, rapid shipping, rigorous testing, and building capabilities that create step-change growth.” · “Lead the processes needed to improve operational stability, including improving code quality, delivering dashboards and data visualizations.”
    Show it by: Gives an example of an error caught before it caused harm; Names the check or standard they used.
  • Leadership and mentoring Core
    In the posting: “The most important skills an engineer at this level must possess are 1) coachability and an eagerness to grow, 2) deep passion for coding, and 3) excellent i…” · “Mental Health & Coaching Benefits”
    Show it by: Describes setting direction or a standard others followed; Names someone they coached and what changed for them.
  • Adaptability and learning Core
    In the posting: “Reddit has a flexible workforce! If you happen to live close to one of our physical office locations our doors are open for you to come into the office as of…” · “Flexible Vacation & Paid Volunteer Time Off”
    Show it by: Describes learning something new quickly and using it; Shows a change of plan and how they adjusted.
  • Communication Supporting
    In the posting: “Support day to day project management tasks including communicating project updates, managing project timelines and overseeing project execution.”
    Show it by: Adapts the message to the listener; Gives an example of explaining something clearly in writing or speech.
  • Customer focus Supporting
    In the posting: “Experience or interest in the advertising business and understanding customer needs”
    Show it by: Puts the customer's need in their own words; Shows a result for the customer, not only for the company.
  • Stakeholder management Supporting
    In the posting: “Build extensible components that would align with the product objectives.”
    Show it by: Shows how they aligned people with different goals; Explains how they handled a 'no' from someone senior.

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Practice questions

  1. Tell me about yourself. Dedicated step-by-step practice.
  2. If an interviewer asks something improper How to respond to questions about age, family, origin or health.
  3. Built from this posting (8):
  4. Walk me through a piece of work where you used your strongest technical skill. What exactly did you do? From this posting
  5. Describe a time you worked with another team to deliver something. What was your part? From this posting
  6. Tell me about a task you took from start to finish without anyone asking you to. From this posting
  7. You have three urgent tasks due today and time to finish only two. How do you decide? From this posting
  8. How have you used python in your work? Walk me through one real example. From this posting
  9. Tell me about a problem you solved using sales. From this posting
  10. Tell me about a time you had to explain something complex to someone outside your field. From this posting
  11. Describe a time you went out of your way to solve a customer's problem. From this posting
  12. This posting reads as Software engineering: its questions come first.
  13. Walk me through a feature you built from start to finish. What tools and languages did you use? Software engineering
  14. Tell me about the hardest bug you have tracked down. How did you find the cause? Software engineering
  15. Describe a technical design decision you made and the trade-off behind it. Software engineering
  16. Tell me about a time you disagreed with a teammate in a code review. Software engineering
  17. Production is down and you are the first engineer to notice. What do you do in the first 30 minutes? Software engineering
  18. How do you decide what to test before you ship a change? Software engineering
  19. Tell me about a time you helped a less experienced engineer get unstuck. Software engineering
  20. Your estimate for a feature turns out to be badly wrong halfway through. What do you do? Software engineering
  21. Two managers ask you to book the same room at the same time. What do you do?
  22. Tell me about a sale or agreement you are proud of.
  23. Describe a time you handled an upset customer or colleague.
  24. Tell me about a time you had several deadlines at once. How did you decide what to do first?
  25. Give an example of a mistake you caught before it caused a problem.
  26. Tell me about a time you taught someone how to do something.
  27. Describe a time you took the lead without being asked.
  28. Tell me about a time you had to explain something complicated in simple terms.
  29. Describe a process you improved.
  30. Do you have any questions for us?
  31. Why do you want to work here?
  32. Why is there a gap in your employment? Difficult question
  33. Why did you leave your last job? Difficult question
  34. Why are you changing careers? Difficult question
  35. What is your greatest weakness? Difficult question
  36. What are your salary expectations? Difficult question
  37. You seem overqualified for this role. Why do you want it? Difficult question
  38. Improper-question practice: How old are you? / Do you have children? / Where are you from originally?
  39. A customer is angry about a delay you did not cause. What do you do?
  40. How do you keep track of many open customer requests?
  41. Tell me about a time you could not give a customer what they wanted.
  42. You find that the inventory count does not match the system. What do you do?
  43. Tell me about a time a shipment or delivery went wrong.
  44. How do you make sure safety rules are followed on a busy shift?
  45. How have you used spreadsheets in your work?
  46. Tell me about a time you had to enter or check a lot of data accurately.
  47. A prospect says your price is too high. How do you respond?
  48. How do you keep your pipeline organised?
  49. Tell me about a technical problem you solved on your own.
  50. You find a bug right before a release. What do you do?
  51. Walk me through how you would check whether a report's numbers are right.