The setting
runs a discussion platform where people post, comment and vote in topic communities. is its advertising software, which lets brands, retailers and agencies deliver, target and measure ads on the platform.
A retry that protects delivery is inflating the purchase record.
MMP retry tolerance preserves conversion capture while idempotency protects advertiser reporting and optimization signals.
Who you’d be doing this for
“My client asked why one buyer shows up twice, and I had no clean answer.”
Guillermo Cardoso · Digital Advertising Manager · a character in this brief
Runs app install campaigns for an agency client and reconciles purchase results across Reddit Ads and the MMP.
What is at stake
Agency buyers see duplicate purchases after delayed MMP retries. You must protect valid App CAPI events while making repeat purchases count once.
Why it isn’t already fixed
Every obvious fix costs something else. That’s the part you’d have to decide.
- retry resilience vs accurate purchase counts
- partner compatibility vs stricter validation
- event retention vs privacy minimization
- fast rollback vs durable signal quality
Why Reddit
Reddit Ads relies on dependable app conversion signals for measurement and lower-funnel campaign optimization.
Written with these in mind
Not your kind of problem? 40 more at Reddit, or browse every organization.
Where the organization context comes fromThe postings this brief was written from, and the reporting read before it.
The organization context comes from public information. The situation and characters are written for the brief.
Job postings it was written from
Public descriptions of the work at Reddit. They are listed as sources, not as openings. The lines under a posting are its own words, where it meets this brief.
- Senior Software Engineer - Messaging (opens in a new tab)
- Senior Backend Engineer, Compliance Engineering (opens in a new tab)
- Software Engineer, Ad Signals (opens in a new tab)
- You will work on MMP integrations, SKAN processing, and App CAPI to make app installs and in-app events more reliable, useful, and easier for advertisers to integrate.
- Incorporate privacy and security requirements into system design, and maintain controls throughout the data lifecycle.
- Engineering Manager, Knowledge Graph Platform (opens in a new tab)
- Senior Software Engineer, Agentic Ads Experience (opens in a new tab)
- Product Execution: Design and ship advertiser-facing AI features and platform (campaign assistants, creative generation, audience discovery, performance analytics, optimization recommendations) end-to-end, from prototype to GA.
- Reddit's Ads business is at an inflection point, and generative AI is reshaping how advertisers plan, build, launch, measure, and optimize campaigns.
This is the setup. The work is inside.
Running it puts you in the room: the full situation and its constraints, stakeholders who push back in their own words, and the decisions that are yours to make. What you produce becomes a Day One Plan — work you can show someone instead of describing.
Where similar work appears
Other live briefs connected to this one, and what connects them.
Similar problems at other organizations
Like this one, each of these is about money moving incorrectly, late, or twice.
Duplicate purchase events are overstating conversions after external payment returns.
You must protect measurement accuracy without suppressing genuine repeat orders or slowing the host application.
Duplicate retry events temporarily double the displayed budget on affected campaigns.
You must restore accurate state without replaying a valid change twice.
A source event is causing 2.8% of Pay in 4 plan rows to appear twice in merchant reports.
You have to restore accurate counts without changing valid historical reporting.
The same setting, from another role
Each is set around Reddit’s Reddit Ads, written for a different role. They’re separate briefs, not the same scenario.
A retailer's $90,000 renewal is stuck behind an order for $120,000.
You must weigh preserving an optional expansion against accepting a smaller firm order with a price concession.
Eight agencies want to introduce advertisers, but disagree on who contracts and gets paid.
You weigh a channel agencies will promote against economics clients will accept and spending that survives the introductory offer.
An agency's $2.4 million upfront now demands rights over brands that already buy directly.
You have to weigh a smaller binding commitment against annual restrictions whose full revenue cost cannot be verified today.
Other problems with a similar purpose
In each of these, as in this one, the aim is to build high-assurance systems where a consequential change's correctness can be demonstrated, not merely hoped for.
Rehearsals show the routing works, but recall of sources varies by 0.9% and provenance records are incomplete.
You have to weigh the contractual launch against how much you verify before each matter moves.
The old encrypted store retires on a fixed date, and 6.9% of historical artifacts still lack a source record and retention decision.
You have to weigh speed against proof that reports stay reproducible.
The residency commitment you signed forces a one-way split of event data, and 9% of derived datasets still lean on labels a machine guessed.
With six weeks left, you weigh completeness by region against keeping analytics intact.