Senior Platform Software Engineer

Cello turns word-of-mouth into a systematic growth channel — trusted by Typeform, Miro, VEED, with 30+ new customers monthly and 10M+ end users. Owns AWS infrastructure end-to-end (architecture, reliability, security, cost) with no infrastructure team above. Designs and maintains CI/CD pipelines from commit to production with zero manual steps. Stack: AWS, Terraform, NestJS, PostgreSQL, GitLab CI/CD. Required: experience building systems at real scale (high traffic, high availability), deep AWS expertise with operational production instinct, strong Infrastructure as Code (Terraform), solid distributed systems thinking (ordering, idempotency, retries, partial failure recovery), production PostgreSQL experience, enough TypeScript/NestJS literacy to read service code. Nice-to-have: observability tooling (OpenTelemetry), event-driven architectures under load (SQS/Kafka), data warehousing (ClickHouse/Snowflake).

https://cello-growth.notion.site/Senior-Platform-Software-Engineer-3923a231c8a380f1af8cc1112673bb0a