Frontend Developer

Position Title : Frontend / Chrome Extension Developer (React + TypeScript)

Experience : 3+ years

Location : Remote

Job Role Summary :

Build and ship production-ready Chrome extensions that inject UI into existing web apps. Own content scripts, DOM integration, performance, and accessibility (WCAG 2.1 AA).

Mandatory Skills :

React, TypeScript, Chrome Extensions (MV3), Content Scripts, DOM Injection, MutationObserver, TailwindCSS/CSS Modules, Accessibility (WCAG 2.1 AA).

Key Responsibilities :

• Develop Chrome extensions using React + TypeScript.
• Inject and manage UI components within third-party web app DOMs.
• Write and maintain content scripts; handle dynamic pages via MutationObserver.
• Implement clean, responsive styling with TailwindCSS or CSS Modules.
• Ensure accessibility (WCAG 2.1 AA), keyboard navigation, and ARIA semantics.
• Integrate with APIs, manage extension permissions, storage, and messaging.
• Optimize performance, handle edge cases across sites, and write basic tests.

Required Skills :

• Strong React + TypeScript in production.
• Chrome Extension architecture: manifest v3, content/background scripts, messaging, permissions.
• DOM manipulation and safe UI injection strategies.
• MutationObserver, event delegation, handling SPA route changes.
• TailwindCSS or CSS Modules; solid CSS fundamentals.
• Accessibility (WCAG 2.1 AA) and cross-browser compatibility (Chromium/Firefox optional).
• Familiarity with build tooling (Vite/Webpack), linting, and Git.

Nice-to-Have :

• Experience with service workers, storage (sync/local), and i18n.
• Testing with Jest/RTL/Playwright.
• Security basics for extensions (CSP, sandboxing).

Job Location: Kharadi, Pune

Job Type: Full-Time

About Us:

NonStop io Technologies is a value-driven company with a strong focus on process-oriented software engineering. We specialize in Product Development and have 10 years of experience in building web and mobile applications across various domains. NonStop io Technologies follows core principles that guide their operations and believe in staying invested in a product's vision for the long term. We are a small but proud group of individuals who believe in the "givers gain" philosophy and strive to provide value in order to seek value. We are committed to delivering top-notch solutions to our clients and are looking for a talented Web UI Developer to join our dynamic team.

Qualifications:

• Strong Experience in JavaScript and React
• Experience in building multi-tier SaaS applications with exposure to micro-services, caching, pub-sub, and messaging technologies
• Experience with design patterns
• Familiarity with UI components library (such as material-UI or Bootstrap) and RESTful APIs
• Experience with web frontend technologies such as HTML5, CSS3, LESS, Bootstrap
• A strong foundation in computer science, with competencies in data structures, algorithms, and software design
• Bachelor's / Master's Degree in CS
• Experience in GIT in mandatory
• Exposure to AWS, Docker, and CI/CD systems like Jenkins is a plus

JOB DESCRIPTION:

• The Development family is responsible for creating, designing, deploying, and supporting applications, programs, and software solutions.
• May include research, new development, prototyping, modification, reuse, re-engineering, maintenance, or any other activities related to software products used internally or externally on product platforms supported by the firm.
• The software development process requires in-depth subject matter expertise in existing and emerging development methodologies, tools, and programming languages.
• Software Developers work closely with business partners and / or external clients in defining requirements and implementing solutions.

RESPONSIBILITIES:

• Lead technical processes and designs considering reliability, data integrity, maintainability, reuse, extensibility, usability, and scalability.
• Review code of development team to ensure quality and adherence to best practices and standards.
• Mentor junior developers to develop their skills and build strong talent.
• Collaborate with Infrastructure partners to identify and deploy optimal hosting environments.
• Define scalability and performance criteria for assigned applications.
• Ensure application meets the performance, privacy, and security requirements.
• Verify test plans to ensure compliance with performance and security requirements.
• Support business and technical presentations in relation to technology platforms and business solutions.
• Mitigate risk by following established procedures and monitoring controls.
• Help develop solutions that balance cost and delivery while meeting business requirements.
• implement technology-specific best practices that are consistent with corporate standards.
• Partner with cross-functional teams to ensure the success of product strategy and project deliverables.
• Manage the software development process.
• Drive new technical and business process improvements.
• Estimate total costs of modules/projects covering both hours and expense.
• Research and evaluate specific technologies, and applications, and contributes to the solution design.
• Construct application Architecture encompassing end-to-end designs.
• Mitigates risk by following established procedures and monitoring controls, spotting key errors, and demonstrating strong ethical behavior.

QUALIFICATIONS:

• Bachelor's degree required with Masters, or equivalent experience preferred
• Minimum of 7 years of related experience.
• 7+ Years of Active Development Experience/ Expertise in Java/J2EE Based Applications proven ability with Hibernate, JPA, Spring, Spring MVC
• Exposure to XML/XSD, JSON and similar data presentation components
• Familiarity with Microservices based architecture and distributed systems.
• Ability to develop and work with REST APIs using Spring Boot framework.
• Knowledge of IBM MQ and messaging protocols such as JMS
• Understanding of Unix/Linux OS including shell scripting
• Strong database and PL/SQL skills
• Experience with CI/CD technologies like GIT, Jenkins, JoCoCo and Maven
• Experience with UI frameworks - Angular, NodeJS and NPM is a plus
• Experience with CSS, HTML, JavaScript, and similar UI frameworks (jQuery, React Angular) is a plus
• Familiarity with Agile development methodology

1. Strong expertise with HTML, CSS, and writing cross-browser compatible code
2. Good understanding of AJAX and JavaScript Dom manipulation Techniques
3. Experience with RESTful services
4. Experience in JavaScript build tools like grunt or gulp
5. Expert in Angular, TypeScript, Angular Material and Server Side Rendering (SSR)
6. Hand on and implements complex Angular applications, directives, controllers, services and components, create the same from scratch
7. Experience in Third Party integrations like Payment Gateway, Facebook, Gmail and any other Google APIs
8. Knowledge of state management tools such, NgRx, Redux

1. Develop User interfaces for Modern Rich Internet Applications with the latest Front End Technologies Perform product analysis and development tasks of increasingly complex nature which may require extensive research and analysis
2. Writing tested and documented JavaScript, HTML and CSS
3. Make design and technical decisions for Angular projects
4. Ensuring high performance