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Faster with Serverless:
Building production-ready applications
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About me
Aleksandar Simovic
Senior Software Engineer @ ScienceExchange
• Co-author of “Serverless Applications with Node.js”
Book published by Manning Publications
• AWS Serverless Hero
• Core team member @ Claudia.js
• Co-organizer of JS Belgrade (~1950 members)
• Co-organizer of Serverless Belgrade
• Organizer of Map Meetup Belgrade (Wardley Maps)
• Writing on Serverless.Pub, streaming on Twitch, building Jarvis
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Why are we here
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Time for a story…
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A story of a startup
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The startup
• Series A, B
• Double digit billion dollar market
• Traction of >100,000 customers
• Innovative, disruptive… you name it
• A-team talent, problem solving (10 engineers)
• Customer-driven
• Diverse customer base, world-wide
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Architecture Overview
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Reasonable enough?
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Actually… No.
• Unpredictable growth with scarce resources
• Customers stuck, failing pilot programs
• Night calls, crashes, scalability issues
• Spending ~20% of backend developer time on
infrastructure
• So much overtime
• Communication issues
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No content
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“Oh, but we think we told you
that there’s a demo tomorrow”
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No content
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“Why don’t you just
scale it up a notch?”
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Startups and financing
• Money is scarce
• Every decision has a high opportunity cost
• Multiple stages cost a lot
(developers, management, investors, customers,
pilot programs)
• Wasting ~20% of backend developer time on preparing
demos, pilot programs, infrastructure
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Average usage (per server)
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Unexpected peak? New customers?
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We didn’t serve
our new customers!
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Peak + a Buffer = The new setup
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If we just reverse it?
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Average waste (per server)
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~ 62.8%
Waste was on average
($40,000 wasted per year)
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But that’s how it should be!
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Your customer
doesn’t care
They didn’t get served.
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Your investors
didn’t care
You failed to serve the
customers
(and you lost the revenue)
(and you wasted the investment)
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The main problems
• Slow feature development cycles
• Bad capacity planning
• Wasting resources
• Miscommunication
• No investment
• Slow pivoting
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Customer doesn’t care
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Why should you care?
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Being a developer is not easy
• Lots of responsibilities
• Increasing complexity
• Everyone wants everything done “yesterday”
• Constantly learning
• Build a “production-ready” application, where if something
goes wrong, its your fault
• Lots of “smart-a**es” telling you what to do (including me)
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What does the customer
care about
Have an application that:
• Runs
• Stable
• Scales
• Satisfies requirements
• Can withstand heavy-loads from day one
• Short Time to Market
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That means that production
ready applications are…
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Production-ready
applications
Apps that satisfy:
• Operational Excellence
• Security
• Reliability
• Performance Efficiency
• Cost Optimization
• Compliance
AWS
Well-Architectured
white paper
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How would I do a startup
now
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Serverless
• No server management, operations, provisioning
• Never pay for idle
• Scales per usage
• Available, resilient with built-in fault tolerance
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Serverless
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It is serverless the same way,
the WiFi is wireless.
Gojko Adzic
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Event listeners
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Not just AWS Lambda
And so many more…
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Remember this?
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Serverless scales with your usage
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But I’m special…
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Are you sure?
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But I want to be in control…
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Pick two
Control
Productivity
Scale
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What about compliance?
Out-of-the-box:
• HIPAA
• PCI
• SOC1, SOC2
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What about security?
How many of you have fixed or applied a patch
• Spectre
• Meltdown
on the 3rd of January 2018?
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How to start?
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Serverless Bootstrap Tools
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Serverless Bootstrap Tool Details
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Why these tools?
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AWS AppSync
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• Serverless backend for web and mobile applications
• Robust GraphQL APIs including schema, resolvers, and
databases
• Client support for offline & subscriptions for real-time
capabilities.
• Available for Web, iOS, Android
AWS AppSync
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AWS Amplify
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JavaScript library for app development using cloud-services
• APIs & serverless logic
• GraphQL Client
• Secure Authentication and Authorization
• Analytics
• Streaming and Real-Time data
• Push Notifications
• Storage / S3
• Internationalization
AWS Amplify
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Integrates with the major frontend frameworks
• React.js
• React Native
• Angular.js
• Vue.js
AWS Amplify
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Why Amplify?
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import { Auth } from ‘aws-amplify’
Auth.signUp({…credentials})
Auth.signIn(username, password)
Auth? - AWS Cognito
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import { withAuthenticator } from ‘aws-amplify-react-native’
export default withAuthenticator(App)
Mobile Authenticator?
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import { Analytics } from ‘aws-amplify-react-native’
Analytics.record(‘Button Pressed!’)
Analytics - AWS Pinpoint
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import { Storage } from ‘aws-amplify-react-native’
Storage.get(‘hello-athens.jpg’)
Storage - AWS S3
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import { API } from ‘aws-amplify’
let apiName = ‘HellasAPI’
let path = ‘/hello-hellas’
API.get(apiName, path)
.then(response => console.log(response))
API - Amazon API Gateway
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import { API, graphqlOperation } from ‘aws-amplify’
API.configure(
graphql_endpoint: ‘https://exampleendpoint.com’
)
const oneEvent = await API.graphql(graphqlOperation(GetEvent, {id: 22}))
API - GraphQL
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And many more…
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AWS Serverless Application Repository
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• Prebuilt serverless components
• Instantly deployable into your account
• Instantly attachable to existing apps using Nested Apps
• Copy as SAM resource
• Can publish and share your own
AWS Serverless Application
Repository
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Stop and show me,
who uses it and how
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Real world case #1
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• >200,000 requests per hour
• Migrated all preprocessors into serverless functions
• Node.js, using Claudia.js
• Depend on unpredictable peaks
• Significant cost reduction
• Migration done by their frontend engineers
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Real world case #2
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• 500,000 users per month
• ~$107 / month.
• Company size of two people
• Migration took around a month
MindMup
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Real world case #3
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ScienceExchange
• Integration with an accounting reports service
• Constant influx of events
• The accounting service product costs $100,000 / year
• Necessary for finance, data science and analytics teams
• Decided to build the project in-house
(estimation 3 months)
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ScienceExchange
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ScienceExchange Result
• Saving $99,990 / year
• Development took 2 weeks
• Scales automatically
• Operational costs: $0.09 per GB
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Key takeaways
• Serverless helps us focus on our business core
• Scale your services, not yourself
• Serverless is much more than AWS Lambda, FaaS
• Enterprises and startups alike are both adopting serverless
• Serverless helps us easily develop and build applications
that are able to withstand heavy-loads from day one.
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Q&A
Thank you!
40% discount
using
claudia40
More at:
serverless.pub
Twitter:
@simalexan