Teams at Circles (circles.co)

Build and scale core platform systems for a global eSIM consumer product. Own end-to-end features, optimize API performance, caching, data access, observability, and event pipelines. Create internal tooling and AI-assisted engineering workflows to improve developer velocity, reliability, and performance across global markets.

Build and own features across multiple microservices stacks, ensure high-quality delivery, establish engineering best practices, collaborate with product and business stakeholders, support production via on-call rotations, and contribute to scalable, high-availability systems.

Support the SOC by tuning SIEM alerts, triaging and investigating incidents, performing forensic analysis, reducing false positives, developing detection rules and use cases, scripting/log parsing, and coordinating global incident response.