Jenkins still powers 28% of all CI/CD and runs inside 80% of the Fortune 500. The problem isn't Jenkins — it's the unmaintained Jenkinsfiles, the 47 plugins nobody updates, and the server that one engineer set up three years ago and nobody dares touch. We build Jenkins pipelines as code, maintain the infrastructure properly, and migrate when the honest answer is GitHub Actions.
Why Entalogics for Jenkins
The Jenkins instances we inherit always have the same problems — a click-configured server nobody can reproduce, 60+ plugins with 20 outdated, freestyle jobs that should be pipelines, and build agents that are snowflakes nobody dares reboot. Jenkins is powerful. Most installations waste that power.
Kubernetes pod agents spin up per build and die after. No state leaking between builds. No "works on the build server" debugging. Clean environment every time. Builds parallelise automatically.
Declarative pipelines in version control. Shared libraries for common steps. No click-configured freestyle jobs surviving past the audit. The pipeline is reviewable, reproducible, and version-controlled.
Every plugin justified, pinned to a version, and tested before upgrade. No installing a plugin to solve a problem that a shell script handles. The plugin list is a security surface — treat it like one.
Groovy shared libraries tested with Jenkins Pipeline Unit. Common deployment, notification, and approval steps centralised and tested. No copy-pasting pipeline code across 200 Jenkinsfiles.
When Jenkins, when not
Jenkins is the most flexible CI/CD server in existence. That flexibility costs operational overhead. We'll tell you on the first call if Jenkins is genuinely justified — or if a managed alternative gets you there with less maintenance.
STAY ON JENKINS WHEN
CONSIDER ALTERNATIVES WHEN
WE SAY NO WHEN
What we build with Jenkins
The shapes of Jenkins development services we deliver most. Each leaves you with a maintainable, reproducible CI/CD system — not a fragile server.
Freestyle jobs to declarative pipelines. Every job in a Jenkinsfile. Shared libraries for common steps. Version-controlled, reviewable, reproducible.
Jenkins on Kubernetes with ephemeral pod agents. Builds scale automatically. No permanent build servers. Helm chart or operator-managed.
Plugin inventory, CVE scan, version pinning, removal of unused plugins. RBAC configured properly. Credentials in a vault, not in job configs.
Groovy shared libraries with unit tests, documentation, and versioned releases. Common deployment, notification, and approval steps — centralised and tested.
When the honest answer is to leave Jenkins. Pipeline-by-pipeline migration to GitHub Actions. No flag-day. Jenkins keeps running until every pipeline has earned its migration.
Jenkins Configuration as Code (JCasC) for server config. Helm for Kubernetes deployment. Docker for controller and agent images. The entire Jenkins instance reproducible from git.
The playbook
Jenkins patterns from real enterprise CI/CD — not a "Hello World" pipeline.
P01
Declarative pipelines by default. Scripted blocks only when declarative genuinely can't express the logic. Readability over cleverness.
P02
Pod templates per pipeline stage. Build, test, and deploy containers defined in the Jenkinsfile. No persistent agents accumulating state between builds.
P03
Jenkins Configuration as Code for every setting — security, credentials, tools, node config. The server is reproducible from a YAML file. No click-configured settings.
P04
Every plugin pinned in a plugins.txt. Upgrades tested in a staging Jenkins before production. No automatic plugin updates breaking builds on a Monday morning.
P05
Jenkins Pipeline Unit testing every shared step. Library versioned with semver. Consumers pin to a version — not `@main`.
P06
HashiCorp Vault or AWS Secrets Manager for all credentials. Jenkins Credentials plugin as a thin accessor. No secrets stored in Jenkins' built-in credential store.
Signature case
A financial services company with 180 Jenkins freestyle jobs — click-configured, no version control, 63 plugins (22 outdated, 4 with known CVEs), builds running on two snowflake VMs nobody dared reboot. Migrated to declarative pipelines, Kubernetes agents, JCasC, and a hardened plugin list in 8 weeks. Build times dropped 60%. Zero builds broken by plugin updates since.
Before
180 freestyle jobs · 63 plugins, 4 CVEs · snowflake VMs · no pipeline-as-code · builds break monthly
After
180 declarative pipelines · 31 plugins, 0 CVEs · K8s agents · JCasC · zero plugin-related failures
Engagement shape
A typical Jenkins development engagement. We fix pipeline by pipeline — the current CI/CD keeps running while we work.
Two senior DevOps engineers. Plugin inventory, CVE scan, pipeline complexity audit, agent infrastructure review. A ranked, dollarized RFC.
JCasC configured, Kubernetes agents wired, shared library scaffolded, first batch of pipelines migrated to declarative. Builds running on new infrastructure.
Each freestyle job converted to a Jenkinsfile. Shared steps extracted into the library. Old agents decommissioned as pipelines move to Kubernetes.
All pipelines in version control. JCasC reproducible. Plugin list hardened. Runbook handed to your team — or we stay on retainer.
Stack
Our default Jenkins development stack — picked for enterprise CI/CD.
Engagement
No hourly retainer that bills for "thinking time." Pick a lane that matches your stage; everything is fixed-quote or transparently rated.
A defined scope, a fixed price, a senior-only team. From audit to production-ready CI/CD in 6–10 weeks.
$15k–$30k
FIXED SCOPE
Embedded engineers in your Slack, your standups. Senior DevOps engineers who maintain Jenkins at scale. Pause, resize, end with 30 days' notice.
$5k / eng / mo
PER ENGINEER
A long-term partner for enterprise DevOps — Jenkins modernisation, migration planning, pipeline architecture, hiring help.
custom
PROCUREMENT-FRIENDLY
Founder-direct
Thirty minutes with the founder. We'll bring a senior DevOps engineer, the relevant playbook, and a candid read on whether Jenkins is the right CI/CD tool — or whether GitHub Actions or GitLab CI serves your team better.
