Senior full stack software engineer

RYZ Labs is looking for a Senior Full-Stack Software Engineer to join one of our client’s teams, a performance advertising company!

You'll ship features into a live PHP monolith that runs a performance advertising business, and you'll help design the services they break out of it. The work starts in the monolith, because that's where the business runs today — and the decisions you make there are what the next architecture gets built on.

Basic Qualifications:

7+ years building and operating production web applications

Deep PHP experience in a long-lived, server-rendered application you were responsible for

You've shipped and operated an integration against a major ad platform's API — Meta, TikTok, Snapchat, or Google/YouTube. We mean the real thing: rate limits and backoff, token rotation, async report jobs, version deprecations, backfilling after an outage

You can talk credibly about normalizing data across more than one ad platform — where the object models refuse to line up, why the same campaign reports different numbers in two places, and how you decide which one billing gets to believe

Strong vanilla JavaScript, and comfort in a modern component framework — you'll be introducing one, not inheriting one

You've owned a system where a bad change costs real money, and you can talk about blast radius, rollback, and how you verify a data change before you run it

Self-directed across time zones, and clear in writing

What makes you stand out:

Production Go

Background job and queue systems — retries, idempotency, work that survives a reboot

An understanding of how commercial media-buying automation platforms are built. You don't need to have built one. We want someone who can reason about how those systems work and what's worth building versus buying

Dense operational UI — data grids, bulk actions, review queues, spreadsheet export. This is what our ad ops team stares at all day

Docker and twelve-factor instincts

Shipping AI-backed features, not j