What are keywords on a resume?

The skills, tools, qualifications and job terms a recruiter searches for. For tech roles they're mostly named technologies and practices like Python, AWS, CI/CD or unit testing.

What are the best keywords for a software developer resume?

The ones in the job post you're applying to. Common ones include your languages and frameworks, SQL, REST APIs, Git, testing, CI/CD, cloud platforms and agile practices.

How many keywords should a resume have?

There's no target number. Aim to cover most of the must-have terms in the job post that you genuinely have, each backed up somewhere in your bullets.

Do ATS systems reject resumes for missing keywords?

Most don't reject automatically, though some companies set knockout questions. Keywords mainly decide whether a recruiter finds you when they search and filter.

Resume keywords for software engineers, by role

By Mubeen Jawed, founder of ResumeForDev · Updated November 7, 2026

Short answer

Resume keywords are the skills, tools and job terms recruiters type into their applicant tracking system to find candidates. For software engineers they're mostly concrete: languages, frameworks, databases, cloud platforms and practices such as CI/CD or testing. The best source is the job description itself. Use each keyword you genuinely have in both the skills section and at least one bullet, in the same spelling the post uses, and never list tools you couldn't discuss in an interview.

Key points

The job description is the best keyword list for that application.
Use a keyword in a bullet as well as the skills section.
Match the post's spelling: “PostgreSQL” vs. “Postgres”, “CI/CD”.
Keyword stuffing hurts with human readers, who see the resume after the search.

How recruiters use keywords

Most applicant tracking systems (Greenhouse, Lever, Workday, iCIMS and others) store your resume as searchable text. Recruiters filter and search by terms like “Kubernetes” or “React”, and some systems rank applicants by how well they match the posting. Missing keywords make you harder to find. Too many, with no evidence behind them, make you look padded once a person reads the page.

Keywords by role

Common resume keywords by technical role
Role	Common keywords
Software developer (general)	data structures, algorithms, object-oriented design, REST APIs, Git, unit testing, CI/CD, code review, agile, SQL
Front end	JavaScript, TypeScript, React, Next.js, HTML, CSS, accessibility, responsive design, performance, Jest
Back end	Java, Python, Go, Node.js, REST, GraphQL, PostgreSQL, Redis, microservices, Docker
DevOps / SRE	AWS, Kubernetes, Terraform, CI/CD, Docker, observability, Prometheus, incident response, Linux, GitOps
Data engineer	SQL, Spark, Airflow, dbt, Kafka, Snowflake, BigQuery, ETL, data modelling, Python
Data analyst	SQL, Excel, Tableau, Power BI, Python, dashboards, data visualization, A/B testing, stakeholder reporting
Data scientist	Python, SQL, statistics, machine learning, scikit-learn, experimentation, A/B testing, causal inference, pandas
Machine learning / AI	PyTorch, TensorFlow, MLOps, model deployment, LLMs, RAG, embeddings, evaluation, feature engineering
Cyber security	SIEM, incident response, threat detection, vulnerability management, SOC, IAM, NIST, MITRE ATT&CK, cloud security
Computer science student	Python, Java, C++, data structures, algorithms, Git, Linux, SQL, object-oriented programming, relevant coursework

These are starting points, not a checklist. Every company phrases things differently, so always compare against the actual post. The role guides go deeper: front end, back end, DevOps, data engineer, data analyst, data scientist, machine learning and cyber security.

How to find the right keywords for a job

Copy the job description and highlight every tool, language and practice.
Mark the ones in “requirements” as must-haves and the ones in “nice to have” as extras.
For each must-have you've used, put it in your skills section and in the bullet where you used it.
Use the post's exact wording for titles and tools where it's accurate.
Skip any keyword you haven't used. It'll come up in the interview.

Before and after

Before:Skills: Kubernetes, Docker, AWS, Terraform, Helm, ArgoCD, Prometheus, Grafana

After:Moved 30 services from EC2 to Kubernetes (EKS) with Terraform and Helm, and added Prometheus alerts that cut time-to-detect for outages from 20 minutes to 3.

A keyword inside a bullet is backed by evidence. A keyword in a list is a claim.

To check coverage against a real post, paste the job description into the free ATS resume checker: it lists the post's technical keywords your resume is missing. For the full method, see how to tailor a resume to a job description.

Frequently asked questions

What are keywords on a resume?: The skills, tools, qualifications and job terms a recruiter searches for. For tech roles they're mostly named technologies and practices like Python, AWS, CI/CD or unit testing.
What are the best keywords for a software developer resume?: The ones in the job post you're applying to. Common ones include your languages and frameworks, SQL, REST APIs, Git, testing, CI/CD, cloud platforms and agile practices.
How many keywords should a resume have?: There's no target number. Aim to cover most of the must-have terms in the job post that you genuinely have, each backed up somewhere in your bullets.
Do ATS systems reject resumes for missing keywords?: Most don't reject automatically, though some companies set knockout questions. Keywords mainly decide whether a recruiter finds you when they search and filter.