Glossary/Plain English9 min2026-06-13TechCerted Editorial

What is the cloud, actually?

A plain-English guide for career switchers: what cloud computing is, which three companies control the market, and how to land your first cloud job without a CS degree

You are probably reading this because someone told you to 'get into the cloud' and you are not sure what that means. After pulling the numbers on this, here is what we found: cloud computing means renting computer power from large data centers over the internet, instead of buying your own hardware. Entry-level cloud engineering roles start at around $111,000 a year (ZipRecruiter 2026), which is about 1.4 times the US median household income of $80,000 (BLS 2024). Three companies run the vast majority of this market -- Amazon Web Services (AWS), Microsoft Azure, and Google Cloud -- and deep knowledge of any one of them opens a meaningful number of job opportunities. You do not need a computer science degree to break in. This guide explains what the cloud actually is without jargon, who hires cloud workers and why, and the fastest credentialed path to your first cloud role.

Plain EnglishWhat is cloud computing?

Instead of buying a physical server and putting it in your office, you rent time on servers owned by Amazon, Microsoft, or Google. Those servers sit in massive buildings called data centers. You access them over the internet and pay only for what you use -- like paying for electricity instead of building your own power plant. The main difference from consumer services like Dropbox: cloud computing is about building and running applications, not just storing files.

What the cloud actually is (the answer that fits on a sticky note)

There is a sticker popular in tech offices that reads: 'There is no cloud, it is just someone else's computer.' That is accurate as far as it goes. The cloud is Amazon's, Microsoft's, and Google's computers -- installed in massive climate-controlled buildings, maintained by thousands of engineers, and rented to businesses and developers by the minute or the gigabyte. When a startup says they 'run on AWS,' they mean they are renting Amazon's servers instead of buying their own. When your company says they are 'moving to the cloud,' they mean replacing physical hardware they own with rented capacity they can scale up or cancel at will.

What makes it economically interesting is the on-demand part. Before cloud computing, a company expecting a big traffic spike had to buy enough servers to handle the peak, then let those servers sit mostly idle the rest of the year. With cloud, you rent extra capacity for a busy week and return it when you are done. That shift from capital expenditure to operational expenditure is why finance teams love the cloud almost as much as engineers do -- and why global cloud infrastructure spending reached $129 billion in a single quarter in early 2026 (Statista 2026). That is not a bubble. That is plumbing.

28%
AWS global cloud market share
Statista 2026
21%
Azure global cloud market share
Statista 2026
14%
Google Cloud global market share
Statista 2026

Why companies stopped buying servers in the 2010s

Amazon launched AWS in 2006 by doing something unexpected: opening up the same infrastructure it used to run Amazon.com for rent to anyone with a credit card. The economics are blunt. A mid-range physical server costs $5,000 to $15,000 upfront, plus power, cooling, rack space, and an engineer to maintain it. Renting equivalent compute on AWS costs roughly $0.10 to $1.00 per hour with zero upfront cost. For workloads that run constantly, owning hardware can still win at scale. For everything else, renting almost always wins -- and even companies that own hardware still hire engineers who know AWS, because they use cloud for the workloads that spill over.

Plain EnglishWhat is IaaS, PaaS, SaaS?

These are the three layers of cloud services. IaaS (Infrastructure as a Service) means renting raw servers and storage -- you manage the software on top. PaaS (Platform as a Service) means renting a ready-to-use environment where you deploy your code without worrying about the underlying server. SaaS (Software as a Service) means using software that runs entirely in the cloud -- Gmail and Slack are SaaS products. Most cloud engineering jobs work at the IaaS or PaaS level, building and maintaining the infrastructure others run their applications on.

Own the hardware vs. rent the cloud: 3-year total cost for a small production workload
Physical server purchase (3-year life)
One-time, excludes network gear
$8,000
Data center colocation (3 years)
$300/month rack space, power, and cooling
$10,800
Total: own the hardware
Before labor and unplanned replacements
$18,800
Equivalent AWS EC2 + RDS + S3 (reserved pricing, 3 years)
~$100/month at reserved instance rates
$3,600
Cloud saves over 3 years
Plus zero upfront capital commitment
$15,200
TotalCloud runs roughly 80% cheaper than owned hardware for most small workloads -- and scales to zero when you shut it off

The actual make-or-break for most teams is not raw cost but engineer time. A cloud engineer who knows AWS can provision a new environment in 20 minutes using infrastructure-as-code. The same job on owned hardware involves rack space, cabling, OS installs, and a ticket queue. The operational overhead is what drives migration decisions more than the server lease price, and it is also what makes skilled cloud engineers valuable.

What cloud engineers actually do and what the role pays

The job title 'cloud engineer' covers a wide range of work, but the core activities are: provisioning infrastructure using code, monitoring and maintaining uptime, managing cloud costs (bills can surprise you), and implementing security guardrails. Senior cloud engineers and architects also design multi-region systems, choose which services to use for which workloads, and review architectural tradeoffs. Most junior cloud roles involve a lot of ticket-based monitoring and small infrastructure changes, progressing into automation and architecture work within 12 to 18 months. For a detailed hour-by-hour look at what the junior version of this role actually involves, see our <a href="/learn/day-in-the-life-junior-cloud-engineer-2026">day in the life of a junior cloud engineer</a>.

Salaries scale sharply with experience and certification. Mid-level cloud engineers (2-4 years in) earn $135,000 to $152,000 (Glassdoor 2026). Senior cloud architects hit $160,000 to $200,000+. Robert Half's 2026 hiring data places cloud and network engineers at $110,000 to $155,000 across all experience levels (Robert Half 2026). Getting the AWS Certified Solutions Architect Associate (SAA-C03) adds roughly 26 percent to base salary compared to uncertified peers at the same experience level (PayScale 2026), which works out to $25,000 to $30,000 on a mid-level engineer's base. You can read the full ROI breakdown in our <a href="/learn/is-aws-solutions-architect-worth-it-2026">AWS Solutions Architect worth-it guide</a>.

The BLS (Bureau of Labor Statistics) closest category is 'Software Developers and Software Quality Assurance Analysts,' with a 2024 median of $132,000 and 26 percent projected growth through 2032 (BLS 2024) -- roughly four times the average across all US occupations. More specifically, the BLS projects computing infrastructure services to be the ninth-fastest-growing industry in the US economy through 2034, adding approximately 317,700 IT openings per year on average (BLS 2026). Cloud is not a niche. It is the infrastructure layer that everything else runs on.

Verdict: Learn AWS first. Then add a second provider based on your target employer.

For most career switchers, AWS is the right starting point. It has the largest job market, the most mature certification path, and the most entry-level roles. AWS certifications appear in over 51,000 active US job listings -- more than any other cloud vendor (ThinkCloudly 2025). Azure is the right choice if you are targeting Microsoft-heavy enterprise IT or government contracting roles. Google Cloud is the right choice if your end goal is data engineering or machine learning operations. Pick one, go deep, then add the others once you have a job. The AWS Cloud Practitioner ($100, 20 hours prep) is the minimum signal. The AWS Solutions Architect Associate ($150, 60-80 hours prep) is the credential that actually moves salary.

FeatureAWSAzure
Global market share (Q1 2026)28%21%
US job listings mentioning cert51,000+ (SAA-C03)~18,000 (AZ-900/AZ-104)
Entry-level cert exam cost$100 (Cloud Practitioner)$165 (AZ-900)
Best for enterprise Microsoft shopsModerate integrationNative first-party support
Best for data engineering and AISageMaker, BedrockAzure ML, OpenAI partnership
Cert recognition with hiring managersHighest broadlyHigh in enterprise/gov

What most cloud explainers miss

Most introductory articles treat the cloud as a single unified market. It is not. AWS, Azure, and Google Cloud are genuinely different products with different strengths, different job markets, and different hiring cultures. A company running .NET applications on Windows Server will almost always be on Azure. A startup building a mobile app or a new SaaS product will almost always be on AWS. A research lab or a team doing large-scale data analytics will often be on Google Cloud. This means the question 'which cloud should I learn?' is not answered by looking at overall market share. It is answered by looking at which companies you want to work for and which platform they run.

The phrase 'the cloud is just someone else's computer' is technically true at the hardware level. But it understates the real value: the ability to provision a global fleet of servers in minutes, scale to zero when traffic drops, and access hundreds of managed services without hiring the specialists to build them from scratch.
Pluralsight · Is the Cloud Just Someone Else's Computer?

The second thing most explainers miss: cloud engineering is not primarily a coding job. You will write code -- infrastructure-as-code tools like Terraform describe your server setup in text files -- but cloud engineering sits closer to systems administration than to software development. The skill that separates good cloud engineers from average ones is architectural judgment: knowing when to use a managed service and when to build your own, how to design for failure, and how to read a cloud bill and understand why it spiked. Those skills come from doing the work, not from drilling exam questions. The hands-on project portfolio matters almost as much as the certification.

Pros
  • High starting salaries ($111K+) accessible without a CS degree through the certification path
  • Strong job market with multiple entry points: cloud ops, DevOps, cloud security, data engineering
  • Skills transfer across providers -- deep AWS knowledge makes Azure and GCP much faster to learn
  • Work is largely remote and asynchronous, which suits career switchers with existing obligations
  • Well-defined certification path with under $500 in total exam fees for entry-level credentials
Cons
  • The AWS console has hundreds of services and the learning curve in the first 2-3 months is steep
  • Cloud bills can surprise beginners -- it is easy to accidentally run up charges during labs if you forget to terminate resources
  • Senior roles require systems-thinking depth that takes 2-3 years in practice to develop, not just study time
  • Entry-level market is competitive: certifications alone without hands-on project experience rarely convert to interviews
  • Continuous learning is mandatory -- AWS releases hundreds of new features each year and exam content refreshes regularly

The fastest credentialed path to your first cloud role

The majority of cloud engineers entered the field through three paths: from IT support (CompTIA A+ or Network+ background, pivoting to AWS), from software development (already coding, adding infrastructure skills), or from a completely unrelated field via a structured self-study sequence. The third path has become genuinely viable because certification costs are low and the job market is wide enough to absorb people who can demonstrate hands-on competence. Here is the sequence that produces the most consistent outcomes for career switchers -- and why it avoids the most common trap (the wrong cert first), which we break down in detail at <a href="/learn/stop-comptia-a-plus-first-cloud-career-2026">stop taking CompTIA A+ first if you want a cloud career</a>.

  1. Months 1-2: AWS Cloud Practitioner (CLF-C02)
    This $100 exam proves you understand cloud concepts and the AWS ecosystem without needing to build anything yet. Best prep: the Stephane Maarek course on udemy.com (under $20 on sale) plus AWS's own free study guide. Budget 20-30 hours total. Do not stop here -- this cert alone does not move hiring outcomes.
    $100 exam fee
  2. Months 2-5: AWS Solutions Architect Associate (SAA-C03)
    This is the $150 exam that actually moves salaries. Do not skip hands-on time -- build a three-tier web application in AWS, configure IAM policies, set up a VPC with public and private subnets. Structured courses on coursera.org or udemy.com include lab environments. Budget 60-80 hours of study plus 10-15 hours of hands-on practice.
    $150 exam fee
  3. Months 4-7: Build one portfolio project
    Before applying, build and document one real project on AWS -- a serverless API, an auto-scaling web app, or a cloud cost monitoring dashboard. Host it on GitHub with a README explaining your architecture decisions. This converts a resume cert into an interview invitation.
    Free on AWS Free Tier
  4. Months 6-9: Apply to the right entry-level titles
    Target 'Cloud Operations Engineer,' 'Junior DevOps Engineer,' 'Cloud Infrastructure Engineer,' or 'Cloud Support Engineer.' These are the real entry points. 'Cloud Architect' requires 3-5 years of experience and is not an entry-level title. The /careers/cloud-architect page has the full role ladder and what each level actually involves.
    First cloud job

On platforms: coursera.org AWS-linked courses carry a verifiable certificate that some employers prefer. udemy.com courses from Stephane Maarek and Adrian Cantrill are cheaper and more frequently updated for exam version changes. linkedin.com/learning is a reasonable option if your employer already pays for a subscription. For official practice exams and exam registration, use mindhub.com (the authorized Pearson VUE portal for AWS exams) -- do not buy vouchers from third-party resellers. For a price-and-content comparison of the major platforms, see /compare/coursera-vs-udemy.

Postings for cloud infrastructure architects increased nearly fivefold year over year in early 2025, in a quarter when overall tech hiring was already at a three-year high. Cloud demand is not slowing -- it is shifting toward engineers who understand security, cost management, and AI-on-cloud workloads.

CompTIA Tech Jobs Report, May 2025

The full cloud career progression runs: Cloud Support or Operations Engineer (entry, $90,000 to $110,000) to Cloud or DevOps Engineer (mid, $120,000 to $155,000) to Cloud Architect or Solutions Architect (senior, $155,000 to $200,000+). Most people make the first jump in 12-18 months post-cert if they have hands-on project work. The senior jump typically takes 3-5 years and requires associate and professional-tier AWS certs plus demonstrated experience designing multi-account environments. See the full role map at <a href="/careers/cloud-architect">/careers/cloud-architect</a> and the cert path at <a href="/certifications/aws-solutions-architect">/certifications/aws-solutions-architect</a>. IDC estimates that more than 90 percent of organizations globally will face significant cloud skills shortages by 2026, at an estimated cost of $5.5 trillion in delayed projects (IDC 2024). The demand side of this equation is not closing on its own.

Do I need to know how to code to work in cloud?+

Not at entry level, but you will need to learn infrastructure-as-code tools like Terraform or AWS CloudFormation within your first 1-2 years. YAML and JSON configuration files are common. Python scripting helps but is not required to pass the AWS Solutions Architect Associate exam or to land your first cloud operations role.

Is AWS harder to learn than Azure or Google Cloud?+

AWS has the most services of any provider, which makes the console feel overwhelming at first. Azure's interface is often described as more familiar to IT professionals who already work in Microsoft environments. Google Cloud has a smaller required service scope for entry-level work. For a raw beginner, AWS and Azure are roughly similar in entry-level difficulty -- the better question is which one appears most in the job listings you are targeting.

What is the difference between the cloud and services like iCloud or Google Drive?+

iCloud and Google Drive are consumer cloud storage products -- SaaS products built on top of cloud infrastructure. When people talk about cloud jobs, they almost always mean IaaS and PaaS work: building and managing the underlying infrastructure, not using consumer apps. Think of it as the difference between working in a restaurant kitchen and eating at the restaurant.

How long does it take to get a cloud job starting from zero?+

The realistic timeline for a motivated career switcher starting from zero is 6-12 months to a first cloud operations or junior DevOps role. That assumes 10-15 hours per week of study, one hands-on portfolio project, and targeted applications to entry-level titles. People who only complete courses without building anything often take 18+ months because they cannot demonstrate skills in technical interviews.

Is the AWS Cloud Practitioner worth getting, or should I skip to Solutions Architect?+

The Cloud Practitioner is worth doing as a 3-4 week foundation, but it does not move salaries or hiring outcomes on its own. Employers recognize it as a conceptual primer, not a job-ready credential. Treat it as the ramp to the AWS Solutions Architect Associate (SAA-C03), which is the first cert that meaningfully improves your prospects. If you already have IT support or sysadmin experience, you can often skip the Cloud Practitioner and go straight to SAA-C03 in 60-80 hours.

Which companies hire the most cloud engineers?+

The largest hirers are the cloud providers themselves (AWS, Azure, GCP), management consulting firms (Deloitte, Accenture, KPMG) running cloud migration practices, enterprise software companies, financial services firms, and healthcare organizations in the middle of multi-year cloud migrations. AWS certifications appear in over 51,000 active US job listings (ThinkCloudly 2025), which gives you a wide pool of potential first employers.