Senior Software Engineer

About this role

About Letly Letly is the AI-Native operating company built for the home. We believe the home should be autonomously run and we're building the software that will run all rental properties end-to-end. The backend at Letly is technically difficult on purpose as the operational realities of handling property and money are messy. But the foundations are already there: 10+ backend and AI services, a monorepo on the frontend, GitOps and Kubernetes on the infra side.

You'd be building on solid ground rather than firefighting a fragile prototype — with a lot still to build. We've raised a $4m pre-seed and are a small, high-agency, engineering-oriented team, growing revenue at >100% month-over-month. We're hiring to facilitate this aggressive growth. Our stack Backend — a microservice architecture in NestJS and TypeScript, with Python and FastAPI for the AI agent services. Data — MongoDB Atlas and Redis.

Event-driven — services coordinate over Pub/Sub rather than calling each other directly. Infra — Kubernetes on GCP (GKE), deployed via ArgoCD. Frontend — Angular in an Nx monorepo. How we build Small, well-factored services with clear boundaries. Tests are written alongside the code, not after it — they're what lets us move quickly without breaking things that handle money. Trunk-based CI/CD: you ship to production and own it, with observability and clean rollbacks.

Lean frameworks, readable code. We work on a wide spectrum of technical challenges from money movement to operational logistics (scheduling, bookings, access) mediated over event-driven systems, to building around AI agents in production that are capable of executing autonomously under the hood. What we're looking for You've built and operated production backend systems that real users depended on. We care about the scope you've owned and how you owned it.

First Class or high 2:1 (or international equivalent) in Computer Science or a relevant technical field. Fluency in at least one backend language and framework. You don't need to arrive fluent in our stack: we hire engineers who've built production systems with any robust framework — NestJS/TypeScript, Java/Spring Boot, Go, Kotlin, C#/.NET or Ruby on Rails — and can ramp into TypeScript fast. System design: where a service boundary belongs, what a design trades away, how services coordinate — events, queues, retries that are safe to repeat — and how it holds up once it's live.