What does technical spec mean in software engineering?

A technical spec is a detailed document that describes what a software system or feature should do, how it should work, and the technical requirements for building it. It includes functional and non-functional requirements, system architecture, database design, API specifications, and acceptance criteria.

How do you use technical spec in a sentence at work?

You typically use 'technical spec' with verbs like 'write,' 'create,' 'review,' or 'follow.' Examples: 'Can you review the technical spec?' or 'We need to finalize the technical spec before development starts.' Do not use it as a verb itself.

Is technical spec formal or informal?

The term itself is relatively informal and commonly used in tech workplaces. However, the document it refers to is typically formal and detailed. You might hear 'tech spec' or 'spec' in casual conversations, but 'technical spec' or 'technical specification' are preferred in formal documentation and meetings.

Who writes a technical spec?

Usually, senior engineers, architects, or tech leads write technical specs. Sometimes they collaborate with product managers, designers, and other stakeholders. Junior developers rarely write the initial spec but often participate in reviewing and implementing according to the spec.

When should a technical spec be written?

A technical spec should be written during the planning or design phase, before development begins. It serves as a guide for implementation and helps prevent misunderstandings and rework later in the project.

technical spec meaning in tech — Speak Tech English

Commonness	5/5
Versatility	4/5
Formality	CasualFormalNeutral
Spoken ↔ Written	SpokenWrittenBoth
Directness ↔ Diplomatic	DirectDiplomaticDirect
Region	US and UK

Say it like this

✓Let us write up the technical spec

✓The technical spec outlines all requirements

✓We need to review the technical spec before launch

Real examples

in a standup

"Has anyone reviewed the technical spec for the new API endpoint?"

in a code review

"This implementation does not match the technical spec we agreed on last week."

in a team meeting

"We should finalize the technical spec before we allocate engineering resources to this feature."

Don't say this

Handle with care. Do not use as a verb (e.g., 'to technical spec something'). It is a noun describing a document or set of requirements, not an action.

✕We need to technical spec this feature tomorrow.

✓We need to write the technical spec for this feature tomorrow.— Technical spec is a noun, not a verb. Use 'write' or 'create' with it.

✕The technical spec is very informal.

✓The technical spec is very detailed and thorough.— Technical specs are expected to be formal and precise, not informal. Describe their quality with words like 'detailed' or 'comprehensive'.

✕We technical spec our projects every month.

✓We create technical specs for our projects during the planning phase.— Again, technical spec cannot be used as a verb. Use 'create,' 'write,' or 'develop' instead.

Other forms

noun

technical spec

"The technical spec for the dashboard redesign is ready for review."

noun (possessive)

technical spec's

"The technical spec is requirements section lists all the features we need to build."

noun (plural)

technical specs

"We have three technical specs in progress this quarter."

Often used with

write a technical specTo create or draft a technical specification document

review the technical specTo examine and provide feedback on a specification

follow the technical specTo implement code according to the specification

detailed technical specA comprehensive specification with thorough requirements

technical spec documentThe formal written specification

update the technical specTo modify or revise an existing specification

Similar words

specificationMore formal term; used interchangeably but 'spec' is the common abbreviation

requirements documentMore focused on requirements; slightly broader in scope than technical spec

design documentEmphasizes design details; may be less focused on functional requirements

PRD (Product Requirements Document)Focuses on product and user requirements; created by product managers, not engineers

Opposites

implementationcode

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Practice

Try it

4 quick exercises

Pick the most natural phrasing

1. Your manager asks you to prepare documentation for a new feature. What do you say?

I will create a technical spec by Friday.I will technical spec this by Friday.I will make the technical spec working tomorrow.I will technical spec it today.

Complete the sentence

2. Before developers start coding, the team must _______ the technical spec with the product manager.

Spot the mistake

3. Which sentence uses 'technical spec' incorrectly?

We need to review the technical spec before the sprint starts.The technical spec outlines all the API endpoints.Can you technical spec the authentication module?The updated technical spec was approved yesterday.

Rewrite naturally

4. Rewrite this in natural tech English: 'We must look at the detailed document that explains what the software should do and how it should work before we begin.'

Questions

Quick poll

Have you said "technical spec" in a standup this week?

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