When a recruiter posts a software engineering role, they define required skills in the job description. The ATS extracts these as keywords and scores incoming resumes by match rate.
A resume with 70% keyword coverage ranks dramatically higher than one with 40%, even if both candidates have similar experience.
The catch: ATS keyword matching is often literal. Writing "JS" when the job says "JavaScript" can cost you a match. Writing "built REST APIs" when the description says "API development" might not register. You need to mirror the exact terminology.
Core Keywords Every Software Engineer Needs
Regardless of your specialization, these keywords appear across virtually all software engineering job descriptions:
- Languages: Python, JavaScript, TypeScript, Java, C#, Go, Rust, C++, SQL
- Version control: Git, GitHub, GitLab, Bitbucket
- Methodologies: Agile, Scrum, CI/CD, Test-Driven Development (TDD), code review
- General skills: debugging, performance optimization, system design, technical documentation, unit testing, integration testing
- Soft skills (yes, they matter): cross-functional collaboration, mentoring, technical leadership
Always spell out acronyms at least once: "Continuous Integration/Continuous Deployment (CI/CD)" catches both the full phrase and the abbreviation.
Frontend Engineer Keywords
- Frameworks: React, Next.js, Vue.js, Angular, Svelte
- Styling: CSS, Tailwind CSS, Sass, CSS-in-JS, responsive design
- Tooling: Webpack, Vite, ESLint, Storybook
- Concepts: component architecture, state management, server-side rendering (SSR), static site generation (SSG), Web Vitals, accessibility (WCAG), progressive web apps (PWA)
- Testing: Jest, React Testing Library, Cypress, Playwright
Backend Engineer Keywords
- Frameworks: Node.js, Express, Django, Flask, Spring Boot, .NET, FastAPI, Ruby on Rails
- Databases: PostgreSQL, MySQL, MongoDB, Redis, DynamoDB, Elasticsearch
- Infrastructure: AWS, Azure, GCP, Docker, Kubernetes, Terraform
- Concepts: REST APIs, GraphQL, microservices, event-driven architecture, message queues (Kafka, RabbitMQ, SQS), caching, database optimization, authentication (OAuth, JWT)
- Observability: logging, monitoring, alerting, Datadog, New Relic, Grafana
Full-Stack Engineer Keywords
Full-stack roles expect a blend. Hit both frontend and backend lists, plus:
- End-to-end feature development
- API design and integration
- Database schema design
- Deployment pipelines
- Cross-browser compatibility
DevOps / Platform Engineer Keywords
- Core: Docker, Kubernetes, Terraform, Ansible, Helm, Jenkins, GitHub Actions, ArgoCD
- Cloud: AWS (EC2, ECS, Lambda, S3, IAM, CloudFormation), Azure, GCP
- Concepts: infrastructure as code (IaC), container orchestration, service mesh, zero-downtime deployments, autoscaling, cost optimization, incident response
- Monitoring: Prometheus, Grafana, PagerDuty, CloudWatch
Keywords by Seniority Level
ATS systems don't just match skills. Recruiters filter by seniority signals too.
Junior / Entry-Level
- Internship, coursework, personal projects, open-source contributions
- Eager learner, fast ramp-up, pair programming
- Focus on specific technologies you've used hands-on
Mid-Level (3-6 years)
- Owned, led, designed, architected
- Cross-team collaboration, project ownership
- Code review, mentoring junior engineers
- Production systems, on-call, incident resolution
Senior / Staff (6+ years)
- Technical leadership, architecture decisions, system design
- Drove adoption, reduced tech debt, defined standards
- Stakeholder alignment, roadmap influence
- Scale (millions of users, high-throughput systems, distributed systems)
How to Use Keywords Without Stuffing
Listing every buzzword in your skills section is obvious and counterproductive. Instead:
Weave keywords into bullet points. "Built a React dashboard with TypeScript, reducing customer support tickets by 35%" hits three keywords naturally.
Use the skills section for breadth. List tools and technologies you've actually used. Group them logically: Languages, Frameworks, Infrastructure, Tools.
Match the job description exactly. If it says "Amazon Web Services," write "Amazon Web Services (AWS)." Not just "AWS."
Quantify wherever possible. "Optimized PostgreSQL queries, reducing p95 latency from 800ms to 120ms" is far stronger than "Database optimization."
Common Mistakes That Kill Keyword Scores
- Using only acronyms: "K8s" instead of "Kubernetes," "RoR" instead of "Ruby on Rails"
- Outdated terms: "AJAX" instead of "asynchronous JavaScript," "LAMP stack" for modern roles
- Vague descriptions: "Various programming languages" instead of listing specific ones
- Missing the obvious: Not including "software engineer" or "software developer" anywhere on your resume when that's the job title
Quick Checklist
- ☐ Read the job description and highlight every skill, tool, and technology mentioned
- ☐ Check that each highlighted term appears on your resume (if you actually have the skill)
- ☐ Use both the full term and abbreviation: "Amazon Web Services (AWS)"
- ☐ Include keywords in context (bullet points), not just in a skills list
- ☐ Run your resume through an ATS checker to see your keyword match score
When your resume is ready, test it against WriteCV's ATS checker for an instant readout on keywords and structure against any specific job description.