ATS Keywords: The Complete List for Software Engineers

Applicant Tracking Systems are the gatekeepers of modern hiring. Before a recruiter ever reads your resume, an ATS scans it for relevant keywords. If your resume doesn't contain the right terms, it gets filtered out regardless of your actual qualifications.

We analyzed thousands of software engineering job postings across major job boards in early 2026 to compile this keyword list. Use it to audit your resume and LinkedIn profile.

Programming Languages

These are the most frequently required languages in 2026 job postings, ranked by frequency:

Python - Appears in 68% of postings. Essential for backend, data science, ML, and scripting roles.
JavaScript / TypeScript - 62% of postings. TypeScript is increasingly preferred over plain JavaScript.
Java - 45% of postings. Still dominant in enterprise, fintech, and Android development.
Go (Golang) - 28% of postings. Growing rapidly for infrastructure, cloud services, and CLI tools.
Rust - 18% of postings. Strong demand in systems programming, blockchain, and performance-critical applications.
C# / .NET - 22% of postings. Common in enterprise software, game development, and Microsoft ecosystem roles.
SQL - 55% of postings. Often overlooked but nearly universal across engineering roles.

Frameworks and Libraries

Include the specific frameworks relevant to your stack:

Frontend: React, Next.js, Vue.js, Angular, Svelte, Tailwind CSS, Redux, Zustand
Backend: Node.js, Express, Django, Flask, FastAPI, Spring Boot, Ruby on Rails, ASP.NET
Mobile: React Native, Flutter, Swift, Kotlin, SwiftUI, Jetpack Compose
Data/ML: TensorFlow, PyTorch, pandas, scikit-learn, Spark, Airflow, dbt

Cloud and Infrastructure Keywords

Cloud skills are no longer optional for most engineering roles:

AWS: EC2, S3, Lambda, ECS, RDS, CloudFormation, CDK, SQS, SNS, DynamoDB
GCP: Cloud Run, BigQuery, Cloud Functions, GKE, Pub/Sub
Azure: Azure Functions, AKS, Cosmos DB, Azure DevOps
Infrastructure: Docker, Kubernetes, Terraform, Helm, Ansible, Pulumi
CI/CD: GitHub Actions, Jenkins, GitLab CI, CircleCI, ArgoCD

Architecture and Methodology Keywords

These terms demonstrate senior-level thinking:

Microservices, Monolith-to-Microservices Migration, Event-Driven Architecture
REST API, GraphQL, gRPC, WebSockets
Agile, Scrum, Kanban, Sprint Planning
TDD, BDD, CI/CD, Trunk-Based Development
System Design, Distributed Systems, High Availability, Fault Tolerance
Observability, Monitoring, Logging (Datadog, Grafana, ELK Stack, OpenTelemetry)

Database Keywords

Relational: PostgreSQL, MySQL, SQL Server, Oracle
NoSQL: MongoDB, Redis, Cassandra, DynamoDB, Elasticsearch
Data Warehousing: Snowflake, Redshift, BigQuery, Databricks

Soft Skill and Process Keywords

ATS systems increasingly scan for these too:

Cross-functional collaboration, Technical Leadership, Mentoring
Code Review, Documentation, Technical Writing
Stakeholder Communication, Product Thinking, Customer Focus

How to Use This List

Don't stuff every keyword into your resume. Instead, follow this process:

Pick 15 to 20 keywords that genuinely reflect your experience.
Weave them naturally into your experience bullet points, skills section, and summary.
Mirror the exact wording from the job description when possible.
Run your resume through our free ATS score checker to see how well your keywords match target roles.

Need help getting your resume past ATS filters automatically? Try JobPilotX to optimize and auto-apply with confidence.