SENIOR JAVASCRIPT ENGINEER SKILLS, EXPERIENCE, AND JOB REQUIREMENTS

Published: Nov 21, 2025 - The Senior JavaScript Engineer has experience with advanced JavaScript (ES6), HTML5, CSS3, and production-level work using React, Redux, Node.js (Express), and backend technologies like Java or Python. This role requires familiarity with REST APIs, debugging multi-threaded applications, performance analysis, SQL databases such as MySQL or PostgreSQL, and container orchestration with Docker and Kubernetes. The engineer also shows strong product ownership, clear English communication, an architect-level mindset, cross-browser compatibility awareness, Agile experience, and the ability to mentor others.

Essential Hard and Soft Skills for a Standout Senior JavaScript Engineer Resume
  • JavaScript Development
  • Full-Stack Development
  • API Design
  • Software Architecture
  • A/B Testing
  • Unit Testing
  • SPA Development
  • Automation Frameworks
  • Quality Assurance
  • Data Modeling
  • Team Leadership
  • Cross-Functional Collaboration
  • Effective Communication
  • Critical Thinking
  • Problem Solving
  • Team Mentorship
  • Constructive Feedback
  • Client Collaboration
  • Innovative Thinking
  • Continuous Learning

Summary of Senior JavaScript Engineer Knowledge and Qualifications on Resume

1. BS in Information Technology with 6 years of Experience

  • Fluent in JavaScript with a demonstrated proficiency in modern design principles.
  • Experience working on development teams shipping software products to market.
  • Hands-on working experience with cloud technologies in large-scale deployments.
  • Tech lead with experience leading groups of developers to successful software deliveries.
  • Practical experience writing/optimizing SQL queries.
  • Working familiarity with using Docker and its role in the DevOps pipeline.
  • Understanding of QA/QC processes.
  • Able to incorporate the right level of test-driven development to improve software and data quality.
  • Proven ability to communicate complex solutions to colleagues and business leaders.

2. BA in Web Development with 4 years of Experience

  • Experience in web and software development.
  • Working experience with JavaScript development.
  • Working experience with TypeScript.
  • Ability to analyze code, modify and improve with programming paradigms.
  • Solid understanding of Web technologies (HTML, CSS, PWAs, SPAs).
  • Experience with at least one of the Android or iOS software development.
  • Experience with build process tools like webpack.
  • Experience with at least one JavaScript testing library (jest, mocha).
  • Able to have exposure to Google Tag Manager (or equivalent).
  • Working experience with at least one major JavaScript framework, e.g., Angular, React, Vue.
  • Excellent communication skills with the ability to influence decision-making across stakeholders.
  • In-depth knowledge of web technologies.
  • Experience with a major analytics platform such as Google Analytics or Adobe Analytics.
  • Experience with the Snowplow Analytics ecosystem.

3. BS in Information Systems with 6 years of Experience

  • Proficient with modern JavaScript and web technologies.
  • Experience designing and evolving large-scale applications using React and Node.js.
  • Extremely organised and methodical whilst remaining pragmatic.
  • Excellent communication in English, both written and verbal.
  • Ability to easily explain complex topics to a non-expert audience.
  • Experience using Detox, Playwright and Jest as automated testing frameworks.
  • Experience using test management tools like TestRail or similar.
  • Experience working with CI tools (GitHub actions, Jenkins, etc.).
  • Able to work in a regulated industry before (e.g., medical devices, quality management system).
  • Experience working in a startup/entrepreneurial environment.

4. BS in Computer Science with 5 years of Experience

  • Solid knowledge of JavaScript and common web technologies (HTML/CSS).
  • Experience with React and Redux or similar modern web frameworks.
  • Experience with REST web services and async flows.
  • Ability and dedication to create clean, performant, easy-to-read and maintainable code.
  • Experience in writing unit and e2e automation tests (Jest, Selenium).
  • DevOps experience with cloud platforms like AWS or Azure.
  • Must have an end-user product mindset.
  • Must have relentless focus on quality and performance.

5. BA in Software Engineering with 4 years of Experience

  • Able to team player in own team and beyond.
  • Eager to learn and experiment.
  • Ability to think out of the box and bring new ideas to the table.
  • Must have experience in Typescript.
  • Experience with Java back-end web services (Spring, Maven).
  • Experience with NoSQL databases such as MongoDB.
  • Experience with API and Data modelling.
  • Experience with live map applications (Leaflet/Mapbox/Google Maps).

6. BS in Computer Engineering with 7 years of Experience

  • Advanced knowledge of JavaScript, ES6.
  • Knowledge of HTML5, CSS3.
  • Hands-on production experience with at least one React, Redux (or similar frontend framework)/Node.js (Express or similar framework).
  • Able to familiarize with REST API's.
  • Experience in debugging multi-threaded applications and performance analysis.
  • Knowledge of databases and SQL, preferably MySQL or PostgreSQL.
  • Strong sense of ownership of a product.
  • Must have communicative English skills.
  • Experience with Docker and containers orchestration with Kubernetes.
  • Understanding of cross-browser compatibility issues.
  • Must have an architect mindset, opinions on patterns and technologies.
  • Experience with other backend technologies, eg, Java, Python.
  • Experience with Agile/Scrum software development.
  • Must have mentoring skills for technical guidance.

7. BS in Applied Computing with 3 years of Experience

  • Experience with a popular JavaScript Framework such as React 16.8 and higher, Angular, or similar.
  • Experience with popular React.js state management workflows such as Flux, Redux, React Context, or similar.
  • Experience with JavaScript ES6 or higher.
  • Experience with REST APIs.
  • Experience with a graph/chart library such as Highcharts, Plotly, or a similar library.
  • Experience with HTML5/CSS3.
  • Experience with Git or a similar version control system.
  • Experience writing SQL queries for databases such as Oracle, PostgreSQL, H2, or similar.
  • Must have good communication skills.

8. BA in Computer Graphics & Visualization with 7 years of Experience

  • Must have expert knowledge of JavaScript.
  • Experience with single-page web app development.
  • Client-side experience with React, Backbone, and Webpack.
  • Server-side experience with Node.js, Express (API development), Firebase, Postgres, and distributed microservices.
  • Ability to write and generate SVGs using Vanilla JavaScript.
  • Experience building text editors or graphic editors.
  • Experience with analytics charting libraries.
  • Advanced proficiency in JavaScript, HTML, and CSS.
  • Experience with Node.js and Angular, Azure, or AWS.
  • Experience on an Agile/Scrum team.

9. BA in Web Development with 6 years of Experience

  • Experience working with React, Typescript, and NodeJS.
  • Must have the craftsmanship of building a functional, maintainable, scalable codebase.
  • Good grasp of challenges related to offline-first desktop or mobile applications.
  • Able to pay attention to detail, especially around design and performance.
  • Must have empathy, a collaborative spirit, and the ability to work effectively with a team.
  • Experience building or contributing to JavaScript developer tools.
  • Experience developing a shipped SaaS product at scale.
  • Excellent problem-solving and critical thinking skills.
  • Experience with serverless architecture.
Relevant Information
JavaScript Developer Skills, Experience, and Job Requirements
Senior Java Developer Skills, Experience, and Job Requirements
Senior JavaScript Developer Skills, Experience, and Job Requirements