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GitHub Actions CI/CD Development
Build, test and deploy workflows that live next to the code in GitHub, without a separate CI server to run.
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What GitHub Actions is
GitHub Actions is the automation system built into GitHub. A workflow is a YAML file in the repository that runs on events such as a push, a pull request or a schedule, on runners GitHub hosts or on machines you control.
Because the pipeline definition is versioned with the code, a change to how the application is built goes through the same review as a change to the application. There is no separate CI server to patch, back up or keep alive.
The cost of that convenience is a dependency on GitHub itself. The reusable workflows, environments and OIDC cloud authentication that make it good are GitHub-specific, so the pipelines do not move to another platform without rework.
Suitability
And when it is not. Choosing the wrong tool costs more than any implementation detail.
Good fit for
- Teams whose source already lives in GitHub and who want CI/CD without running infrastructure for it
- Pipelines that need pull-request checks, required reviews and deployment approvals tied to the same repository
- Deployments to cloud providers where short-lived OIDC credentials are preferable to stored access keys
- Monorepos or several services that can share reusable workflows instead of copying pipeline files
Consider alternatives for
- Source hosted on GitLab or Bitbucket, where moving CI to GitHub just to use Actions adds friction
- Builds that need very large or specialised machines for long periods, where hosted runner minutes become expensive and self-hosted runners are the better tool
- Air-gapped or strictly regulated environments where code and build logs cannot leave your network, unless you operate GitHub Enterprise Server
In practice
01
Pull-request checks
Lint, type-check and test jobs that run on every pull request, cached so they stay fast enough that people do not learn to ignore them.
02
Deployment pipelines
Build once, then promote the same artefact through staging to production using environments, required reviewers and OIDC-based cloud authentication.
03
Scheduled and repository automation
Dependency update checks, nightly integration tests and release tagging, so routine upkeep stops depending on someone remembering it.
Considerations
Practical notes from running this in production.
- 01
Third-party actions run with access to your secrets. Pin them to a full commit hash rather than a moving tag, and prefer a small number of well-maintained ones.
- 02
The default token permissions are often broader than a job needs. Set the permissions block explicitly so a compromised step cannot push code or edit releases.
- 03
Workflows triggered from forks and by pull_request_target behave differently with secrets. Misconfiguring them is a well-known way to leak credentials.
- 04
Hosted runner minutes are metered. An uncached build on a large test suite adds up, and the first fix is almost always caching and splitting jobs, not paying for bigger runners.
FAQ
Should we use GitHub Actions or Jenkins?
If your code is on GitHub and your pipelines are ordinary build, test and deploy steps, Actions removes a server you would otherwise maintain. Jenkins still makes sense when you need heavy customisation, run entirely on private infrastructure, or already have a large investment in it.
Can you migrate our existing pipelines to GitHub Actions?
Yes. The usual approach is to port one representative pipeline first, run both side by side for a short period, then move the rest. Anything that relies on plugins unique to the old system gets flagged early rather than discovered halfway through.
How do deployments authenticate to the cloud safely?
We use OIDC federation where the provider supports it, so a workflow requests short-lived credentials at run time instead of holding a long-lived access key in repository secrets.
How long does a GitHub Actions development project take?
It depends on scope. A focused first release is usually weeks rather than months, while larger platforms are delivered in phases. We give a written estimate after a short discovery conversation and agree milestones before work starts.
How is GitHub Actions development work priced?
We work either to a fixed scope with agreed milestones or on a time-and-materials basis, whichever suits how well the requirements are known. You receive the estimate and its assumptions in writing before committing.
By industry
Where we apply GitHub Actions. Tiles marked "Guide" open a dedicated write-up; the rest open the industry page.
Let’s talk about your GitHub Actions project
Tell us what you are trying to build or fix. We will come back with scope, approach and an honest view on cost and timeline.