AWS Lambda

What is AWS Lambda?

AWS Lambda is Amazon's serverless compute service. You upload a function, define what triggers it, and Amazon runs it on demand. No servers to provision, patch, or keep warm. When nothing calls your function, you pay nothing. When a thousand requests arrive at once, Lambda spins up a thousand copies and bills you per invocation and the milliseconds each one runs.

"Serverless" is a slight lie. There are servers; you just never see them. The model fits event-driven work especially well: a file lands in S3 and a function processes it, an API request comes in and a function answers, a queue fills and functions drain it. The catch is cold starts, the brief delay when a function spins up from idle, and limits on how long a single run can last. A media company that resizes every uploaded image with a Lambda triggered on upload gets effortless scaling for a workload that is busy at noon and silent at 3am, and pays only for the work done.

Compared with running a traditional server or a container that stays on around the clock, Lambda shifts the math. You trade some control and predictability for not managing infrastructure and for cost that tracks usage instead of uptime.

AWS Lambda at Dallonses

We build serverless backends on Lambda when the workload suits it, and plenty do. Bursty traffic, scheduled jobs, image and video processing, webhook handlers, glue between services. The pattern keeps operational overhead low and lets a client's bill follow real demand rather than a server sitting idle overnight.

Serverless is not free of trade-offs, and we are honest about them with clients. Cold starts, execution limits, and the discipline of designing around them all matter. We architect with those edges in mind, watch where cost can creep, and reach for containers or always-on services when a problem genuinely calls for them instead of forcing everything through one model.

Thinking serverless for your backend? Let's figure out if it fits.

Talk serverless with us