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CL-205 Cloud & Platform

Serverless Engineering on AWS (Lambda · DynamoDB)

From zero JavaScript to a running serverless API: Lambda fundamentals, DynamoDB modeling, API Gateway, streams-driven processing, pagination and testing — with local emulation so every learner ships a complete CRUD service with tests by day two.

B3Practitioner
5modules
35skill atoms
1role journey
Curriculum

What this course covers.

5 modules, 35 named skill atoms. Expand any module to see them.

1JavaScript Ramp7 skill atoms
language essentialsasync patternspromises & async/awaitdestructuring & ES modulestry/catch around awaitsnpm & package.json basicsJSON parse/stringify pitfalls
2Lambda Fundamentals7 skill atoms
handlerscold startspermissionsevent & context objectsmemory-to-CPU couplingtimeout & retry behaviour per triggerexecution role vs resource policy
3DynamoDB Modeling7 skill atoms
keysaccess patternssingle-table thinkingpartition vs sort key designGSI projection choicesquery vs scan coston-demand vs provisioned capacity
4API Assembly7 skill atoms
API GatewayCRUD routesvalidationREST vs HTTP API choiceLambda proxy integrationrequest validators & modelsCORS & stage configuration
5Streams & Testing7 skill atoms
DynamoDB Streamspaginationtest suitesstream view typesbatch size & partial batch failuresLastEvaluatedKey paginglocal emulation with SAM
Where it fits

CL-205 in a role journey.

This course appears in 1 of our 45 role journeys. Here is what a learner takes immediately before and after it in each.

Cloud Engineer

Practitioner stage
CL-221CL-205CL-322

Roles this course serves

The capability ladder

This course is authored to band B3.

Every course we run is written to one rung of the CASI ladder, so a plan can be assembled to take a team from where they are to where they need to be.

What do B1–B6 mean?The CASI Capability Ladder — click to expand

Every course targets a band on the CASI Capability Ladder — our six-band proficiency scale, anchored to open standards (O*NET, ESCO, NICE, NIST AI RMF, Bloom's). A band tells you how deep a course goes, and what evidence proves it.

What the learner can doTypical evidence
B1
AwareUnderstands concepts and vocabulary; uses tools with guidance
Knowledge checks
B2
FoundationPerforms standard tasks correctly in familiar contexts
Guided labs, autograded exercises
B3
PractitionerDelivers complete pieces of work independently
Scenario labs, proctored hands-on exams
B4
ProfessionalHandles production-grade complexity, trade-offs and failure modes
Break-fix drills, design defenses
B5
AdvancedEngineers systems end-to-end under constraints; leads others
Rubric-scored capstones, vivas
B6
ExpertSets direction; recognised authority across teams
Portfolio + panel evaluation

A note on B6. Courses in this catalog target B1–B5. B6 is not taught — it is recognised, through a portfolio and a panel, once someone is setting direction for others. Every journey here is built to land a learner at B5.

Next step

Run CL-205 for your team.

This course runs at several lengths depending on how deep you need to go and how much of it your people already have. Tell us who is being trained and we will scope it.

Add it to a training plan Talk to our team Check your team’s level free