Build and customize frontend solutions using Vanilla JavaScript, jQuery, HTML, and CSS. Debug complex client-side issues, manipulate the DOM, handle events, analyze Fetch/XHR requests, use MutationObservers, and modify live websites safely. Ensure cross-browser compatibility, responsive behavior, performance, and resilience to dynamic updates while collaborating cross-functionally on client scenarios and experiments.
We are looking for a Senior Software Engineer who is comfortable working with Vanilla JavaScript, HTML, and CSS to build and customize frontend solutions, debug complex client-side issues using browser developer tools, and handle DOM manipulation, event handling, and dynamic UI updates. Should be confident analyzing APIs through Fetch/XHR requests, tracking DOM changes using MutationObserver and browser console techniques, and making real-time UI modifications using inspect element and custom scripts. The role also requires troubleshooting frontend issues across browsers and collaborating with cross-functional teams to solve real-world client scenarios while ensuring smooth and optimized user experiences.
Key Responsibilities:
Examples of Tasks You Will Perform- Rearranging elements on a page dynamically.
- Creating new UI blocks using JavaScript, jQuery and CSS.
- Overriding existing styles safely.
- Preventing interference from existing scripts and styles.
- Ensuring compatibility across devices and screen sizes.
- Making changes that survive dynamic DOM updates.
- Tracking user interactions for experiments.
- Strong understanding of Vanilla JavaScript, jQuery, HTML and CSS.
- Advanced DOM traversal and manipulation.
- Event handling and debugging in live environments.
- Using MutationObservers for dynamic content.
- Handling Single Page Applications (SPAs).
- Writing safe and conflict-free CSS.
- Understanding browser behaviour and edge cases.
- Performance-safe scripting on production websites.
This role is highly problem-solving oriented. There is no clean HTML, no reusable components, and often no documentation. You must analyse the DOM like a detective and figure out how to safely manipulate it in real-time.
Who Will Enjoy This Role- Developers who love JavaScript, jQuery and CSS deeply.
- Those who enjoy solving DOM challenges.
- People are comfortable working without access to source code.
- Developers who like debugging tricky real-world issues.
We don’t build websites — we intelligently manipulate the DOM using Vanilla JavaScript, jQuery and CSS to run experiments on live websites.
At Wingify, we are committed to building a diverse, equitable, and inclusive workplace. We believe that a variety of perspectives drives better ideas, stronger execution, and more meaningful impact. Read more about our policy here: https://wingify.com/careers/equal-opportunity-policy/
Similar Jobs
Artificial Intelligence • Healthtech • Machine Learning • Natural Language Processing • Biotech • Pharmaceutical
Manage pharmaceutical quality systems and compliance for quality control and stability laboratories. Responsibilities include approving method transfer and validation documentation, ensuring cGMP compliance, leading change control, tracking CAPA and metrics, managing LIMS builds, reviewing laboratory data, supporting investigations, participating in audits and safety inspections, recommending corrective actions, and mentoring junior colleagues.
Top Skills:
CapaChange ControlCurrent Good Manufacturing Practices (Cgmp)Laboratory Information Management Systems (Lims)Quality Management Systems (Qms)Risk Management
Financial Services
Leads compliance and operational risk control testing strategies, evaluates complex control environments, identifies gaps, validates remediation, and ensures regulatory alignment. The role develops testing documentation, manages complex initiatives, engages senior stakeholders, and influences business decisions. It requires advanced analytical, project management, communication, and risk-control expertise, with opportunities to apply automation and AI-driven testing frameworks.
Top Skills:
ExcelMS OfficeMicrosoft PowerpointMicrosoft WordSox
Automotive
Develop and maintain automation workflows using RPA tools and programming languages. Analyze business processes, identify automation opportunities, test and debug bots, document solutions, monitor deployments, troubleshoot failures, support financial close and period management, manage technology refreshes, assist with feed transitions, and support audit requests and system stability.
Top Skills:
.NetAutomation AnywhereC#JavaMicrosoft Power AutomatePega RpaPythonUipath
What you need to know about the Kolkata Tech Scene
When considering the industries shaping India's tech scene, gaming might not immediately come to mind. However, in the last decade, increased internet usage and greater access to mobile devices have catapulted the industry to new heights, with Kolkata-based companies like Virtualinfocom, Red Apple Technologies and Digitoonz, at the forefront, driving the design and animation of new gaming titles for players.
