Why One DevOps Engineer Is Never Enough

Publication date: 2026.03.09.

MANAGED SERVICE SERIES - ARTICLE 1 OF 3

The Single Engineer Trap:
Why Modern Infrastructure Needs More Than One Person

Relying on one DevOps engineer creates hidden risks most companies only discover after something breaks. Here is what resilient infrastructure actually requires.

Your DevOps Engineer Just Handed in Their Notice

They have been with you for two years. They built the pipelines, migrated you to AWS, set up your monitoring stack, and quietly kept everything running. And now they have three weeks left.

You have 15 developers, two product lines in production, and no one else who knows what a Terraform state file is.

This is the single engineer trap. And it is more common than most engineering leaders want to admit.

Why It Keeps Happening

Most companies arrive at the single DevOps engineer model gradually. A startup scales fast and needs infrastructure help. Someone internal steps up, or a junior is promoted, or a first dedicated hire is made. Things stabilise. The model works well enough.

What nobody plans for is what happens next. The engineer becomes the single source of truth for every infrastructure decision. Architecture choices made in sprints never get documented. Workarounds get applied and forgotten. Runbooks are promises that never get written.

There is a term for this in engineering: the bus factor. How many people would need to leave for your infrastructure to become unmanageable? In most single-engineer setups, the answer is one.

The Myth of the Full-Stack DevOps Engineer

Part of the problem is that the role was always an impossible one. The average DevOps job description asks for:

AWS and GCP expertise
Kubernetes internals and Terraform
CI/CD pipeline design across multiple tools
Observability: Prometheus, Grafana, Datadog
Network security and zero-trust architecture
Compliance: SOC 2, ISO 27001
Cost optimisation and FinOps

That is not one job. That is five or six different specialties
bundled into a single title.

Even the most talented engineers cover two or three of these domains deeply. Someone who excels at AWS networking and infrastructure-as-code may have only a surface understanding of security posture. A CI/CD expert may not be the right person to review your compliance controls.

The "unicorn" full-stack DevOps engineer is not rare because companies are too demanding. They are rare because they do not exist at scale.

Four Risks You Are Already Carrying

If you are operating with a single DevOps engineer today, you are carrying these structural risks whether you have named them or not.

1. The Bus Factor

Knowledge built by one person stays with that person. Architecture rationale, undocumented decisions, the story behind that oddly named security group - none of it survives a departure cleanly.

You can request handover documentation. You will rarely get enough.

2. Burnout Before the Resignation

On-call alerts at 3 AM. Developer interruptions. Finance questions about cloud costs. Security reviews in the backlog. The CEO wants an uptime report.

When one person absorbs all of this indefinitely, burnout is the expected outcome. Average DevOps tenure is 1-2 years, and burnout is among the most commonly cited reasons for leaving.

3. No Sustainable On-Call

Reliable on-call coverage requires at minimum three to four engineers on rotation. With one person, your operational coverage is one person - indefinitely.

This is occasionally acceptable in early stages. As infrastructure complexity grows, it becomes untenable - and your engineer knows it.

4. No Internal Growth Path

Engineers grow by working with other engineers. Code reviews, architecture discussions, exposure to different approaches - these require peers.

A solo DevOps hire in a company of developers has no technical community to grow within. Stagnation follows, and stagnation leads to the departure you were trying to avoid.

What "Enough" Actually Looks Like

What does a structurally resilient DevOps function require?

Capability	What It Means	Why It Matters
Primary engineer	Deep context on your specific environment	Day-to-day operations and continuity
Secondary engineer	Overlapping knowledge, able to act independently	Eliminates the bus factor
On-call rotation	Minimum 2-3 people	Sustainable coverage without burning anyone out
Architectural oversight	Someone thinking 6-12 months ahead	Scalability, compliance, cost, security

For most growing companies, covering all four with in-house hires means a minimum of three DevOps engineers and EUR 200,000+ per year in fully loaded salary costs, plus recruitment time, onboarding, and ongoing management.

This is not a reason to panic. It is a reason to reconsider the model.

Design for Redundancy Before You Need It

The most expensive time to solve the single engineer problem is after it becomes a crisis. Most companies we work with come to us after an outage, after a resignation, or after a compliance audit surfaces an architecture no one fully understands anymore.

They wish they had acted earlier. Not because a vendor told them to - but because the cost and disruption of fixing a broken model mid-flight is always greater than the cost of building a resilient one from the start.

You do not need to hire three people tomorrow. You need to stop treating a single point of failure as a stable long-term state.

Next in this series

Managed DevOps vs. Hiring In-House: How to Decide
A five-question framework for making the decision consciously, not by default.

Not sure if your DevOps setup is resilient enough?

Book a free 30-minute consultation. We will give you an honest assessment of your current infrastructure coverage, even if the answer is to hire internally.

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