How Circle Scaled Their Engineering Team With Queue

From fragmented sprints to a coordinated agent system

Cirlce is a B2B sales intelligence platform used by over 400 revenue teams across North America and Europe. For years, their engineering team was quietly effective — but stretched thin. Feature work competed with migrations, test coverage lagged, and onboarding new engineers was slow because so much knowledge lived in individual heads. The team shipped consistently, but never as fast as the roadmap demanded. Junior engineers spent most of their time on scaffolding and glue code. Senior engineers spent more time reviewing and unblocking than building.

Deploying agents for the in-between work

Queue gave Cirlce a way to deploy AI coding agents for the work that sat between sprints — test generation, refactoring, API integration scaffolding, and documentation. Engineers described their role in Queue tasks as ‘directing, not doing.’ They would scope a task, hand it to a Queue agent, review the output, and merge. The feedback loop that once required a full day of focused effort collapsed to under an hour. The team stopped talking about bandwidth and started talking about what to build next.

"Queue changed how our team thinks about execution. Instead of spending days on scaffolding, test coverage, and integration work, engineers focus on decisions while agents handle implementation. We didn't just ship faster—we finally felt like our roadmap and our capacity were aligned."

Alex Mercer

Engineering Lead

From idea to production in hours

Speed compounded quickly. What once took a week of engineer time now takes a morning. Queue agents handle the implementation; engineers handle the judgment. One senior engineer described it simply: ‘I stopped feeling like I was behind.’ Feature branches that used to sit open for days waiting for someone to close out the final 20% now get finished. PRs are smaller, cleaner, and faster to review. The team ships more confidently because the quality bar has actually risen alongside the velocity.

An engineering culture that compounds

The most significant shift wasn’t in the tooling — it was in how engineers think about their own work. With Queue handling repetitive tasks, the definition of ‘engineering work’ at Cirlce evolved. Architects spent more time on architecture. Product engineers shipped more product. Junior engineers leveled up faster because they could focus on real problems rather than boilerplate. The culture became one of high judgment and high output, rather than high effort and modest throughput.

Results that compound

Feature output tripled within two quarters of adopting Queue. Time spent on repetitive coding tasks dropped 62% as agents absorbed scaffolding, test writing, and routine refactoring. More importantly, the team began shipping higher-quality code faster — because Queue agents applied consistent style, coverage, and documentation standards across every task. For Cirlce, Queue didn’t just save time. It raised the floor.