Senior Platform Software Engineer

Stack

Responsibilities

• ▹Work directly with stakeholders - no walls, no ticket factory
• ▹Manage AWS infrastructure: architecture, reliability, security, and cost
• ▹Design and maintain CI/CD pipelines that let engineers ship confidently and fast, from commit to production
• ▹Help decide when to ship fast to learn and when to slow down to fix the foundation
• ▹Have real influence on architecture and product direction, not just coding tickets
• ▹Help the team adopt the latest AI improvements to speed up how they build and ship

Requirements

• ▹Good communication skills and a collaborative attitude
• ▹Experience building systems at real scale: high traffic, large user base, high availability
• ▹Deep AWS expertise across compute, messaging, storage, networking, and observability, with operational instinct from running things in production
• ▹Strong experience with Infrastructure as Code (Terraform or similar) - everything versioned, no clicking around in consoles
• ▹Solid distributed systems thinking: ordering guarantees, idempotency, retries, at-least-once delivery, partial failure recovery
• ▹Experience running PostgreSQL in production: configuration, connection pooling, migrations, performance, backup and restore
• ▹Enough application-layer literacy to read TypeScript/Node.js (NestJS) code and understand what a service is doing
• ▹Know when something is good enough, and when it's worth investing in extra quality
• ▹Strong problem-solving skills: breaking down complex, ambiguous problems and shipping pragmatic solutions

Soft skills

About the company

Cello is an AI-powered infrastructure company that has raised $10.3M from top-tier investors, helping SaaS companies turn their users and partners into a sales channel through referrals and sharing. Over 10 million end users interact with their system every month, and the founding team includes operators from Twilio, Wise, and Skype. The company is remote-first with regular in-person team meetups.