Senior Frontend Developer

Job Title: MERN STACK Developer

Location: Hybrid weekly ⅔ days WFO (Bengaluru- India)

About the Role:

We're looking for a passionate and skilled Frontend Engineer with 1–3 years of experience to join our growing development team. This role is front-end-heavy, focused on building clean, scalable, and high-performance user interfaces using the latest technologies in the MERN stack—particularly Next.js, React, TypeScript, and Material UI (MUI).

You’ll work alongside a collaborative and talented team to design and build seamless web experiences that delight users. If you're excited about modern frontend architecture and want to grow in a fast-moving, remote-first environment, we'd love to hear from you.

Key Responsibilities:

• Develop responsive, high-performance web applications using Next.js, React, and TypeScript.
• Translate UI/UX designs into functional frontend components using MUI.
• Collaborate with backend developers, designers, and product managers to deliver new features and improvements.
• Ensure code quality through best practices, code reviews, and testing.
• Optimize applications for maximum speed and scalability.

Must-Have Skills:

• 1–3 years of professional experience in frontend development.
• Strong proficiency in React, Next.js, and TypeScript.
• Experience with Material UI (MUI) or similar component libraries.
• Understanding of responsive design, modern frontend tooling, and web performance best practices.
• Familiarity with Git and collaborative workflows.

Nice-to-Have (Bonus) Skills:

• Familiarity with testing libraries (Jest, React Testing Library, Cypress).
• Experience working with design tools like Figma or Adobe XD.
• Basic knowledge of accessibility (a11y) standards and performance optimization.
• Basic experience with Node.js, MongoDB, or working in a MERN stack environment.
• Familiarity with AWS services or cloud deployment practices.
• Experience with RESTful APIs or integrating with backend services.

We are seeking a highly motivated Software Development Engineer with expertise in building scalable, extensible and user-friendly web applications. You will work with a fast paced Product Engineering team to build efficient and reusable web applications for mobile and fixed devices. 

What you’ll do:

• Architect, Design, Code reviews and build scalable applications.
• You will be engaged in identifying and addressing performance bottlenecks, and collaborate with other team members to innovate current/new products. 
• Identify, communicate and implement best practices for application engineering. 
• Ensure high scalability and performance

• You will advocate for good, clean, well-documented and performing code; define and follow standards and best practices for front-end development.

We’d love for you to have:

• Experience: 1-3 yrs recent experience of working in a scalable web product firm
• Education: B.Tech/M.Tech  in Computer Science from Top ranked colleges in India
• Excellent software development skills in developing web applications over client-side frameworks - Backbone, React (preferred) and/or angular frameworks (preferred); and server-side frameworks like node.js
• Excellent programming skills in object-oriented, modularised JavaScript, Typescript (preferred)
• Strong knowledge and working experience in server-side Event-driven programming using Node.js
• Excellent programming skills in Javascript,  jQuery, AJAX, YUI.
• Passion for writing optimized code using JS best practices  and design patterns
• Experience with JS or Java-based Unit/Integration Testing using Selenium, Appium, Selendroid
• Hands-on experience in building scalable web applications
• Excellent problem solving and debugging skills
• Good Knowledge of version control - GIT (preferred)
• Experience with the full software development lifecycle, design, develop, debug, document, and deliver (especially in a multiple site organization)
• Strong verbal and written communication skills
• Ability to deliver great results in an agile development
• Good to have: Working knowledge of web standards (i.e., REST) and OOPS
• Good to have: Experience in Data Structures, Algorithms and their optimization

Even if you don’t meet all of these qualifications above, we’d still love to hear from you. Tell us about your unique qualifications in your cover letter.

CaaStle is committed to equality of opportunity in employment. It has been and will continue to be the policy of CaaStle to provide full and equal employment opportunities to all employees and candidates for employment without regard to race, color, religion, national or ethnic origin, veteran status, age, sexual orientation, gender identity, or physical or mental disability. This policy applies to all terms, conditions and privileges of employment, such as those pertaining to training, transfer, promotion, compensation and recreational programs.

• Candidate should have strong knowledge of Javascript and HTML5 Canvas
• Should have knowledge of HTML5 Canvas Drawing Pad
• Experience in HTML5 Canvas is a must
• Thorough semantics-level understanding of HTML5 Canvas
• Good understanding of JavaScript programming and DOM manipulation
• Understanding and deployment of Responsive Web Design
• Understanding of how web design/dev is related to web Performance

• Candidate should be available to join immediately

Qapita is a SaaS-Net startup with offices in India & Singapore. Qapita’s vision is to transform how equity is managed and traded in the private capital markets in this region. Qapita’s software solution seeks to automate the equity management process for startups including workflows around CapTables, ESOPs, Due-diligence, and transactions. Qapita’s market place solution seeks to facilitate liquidity to ESOP holders and shareholders via structured liquidity programs and secondary transactions. Qapita seeks to automate all processes for equity matters in private markets via its digital platform.

We are looking for a Senior Frontend Developer who is curious, craves for new challenges and loves to solve problems using latest technology. In this role, you will be responsible for developing and implementing user interface components using React.js concepts and workflows such as Redux, Flux, and Webpack.

You will also be responsible for profiling and improving front-end performance and documenting our front-end codebase.

Our Tech stack:

Frontend: React, Typescript, Html, SCSS

Backend: Linux (Ubuntu), ASP.NET Core, C#, Nginx, MongoDB, EventStoreDB

Responsibilities: As a Senior Frontend Developer, you will be

• Meeting with the development team to discuss user interface ideas and applications.

• Reviewing application requirements and interface designs.

• Identifying web-based user interactions.

• Developing and implementing highly-responsive user interface components using React concepts.

• Writing application interface code using TypeScript following React.js workflows.

• Troubleshooting interface software and debugging application code.

• Developing and implementing front-end architecture to support user interface concepts.

• Monitoring and improving front-end performance.

• Documenting application changes and developing updates.

Desired Skills and Experience :

• Bachelor's degree in Computer Science, Information Technology, or a similar field.

• Previous experience working as a React.js Developer (4+ years).

• In-depth knowledge of JavaScript, CSS, HTML and front-end languages.

• Knowledge of TypeScript a plus.

• Knowledge of React tools including React.js, Webpack, Redux.

• Knowledge of performance testing frameworks including Mocha and Jest.

• Experience with browser-based debugging and performance testing software.

• Excellent troubleshooting skills.

About Xpresslane:
Xpresslane is a universal one-click checkout platform for eCommerce. We want to transform the way online shoppers buy, Democratize optimized checkout and post checkout experience. We have achieved 150+ signups from D2C merchants in the last year alone and are aggressively adding new features to help solve problems in their checkout process.

Engineering @Xpresslane:
We are a small group of Tech Enthusiasts, Product Managers. We give incredible value to design and UX is our topmost priority. We've implemented products using Go, Java, Kubernetes, Docker, Temporal, GraphDB, Svelte & React, Cypress, Gitlab CI/CD.

Why Engineering @Xpresslane:

• Opportunity to Design & Implement new features which are internet-facing.
• Opportunity to Design Scalable Distributed System spanning many regions.
• Freedom to learn & work across Frontend/Backend/Devops/Design Expertise.
• 2-4 years of experience in Frontend Engineering.
• Expertise in one or more frontend frameworks like React/Angular/Vue/Svelte
• Style the frontend applications with an incredible focus on design & UX.
• Self-driven in identifying opportunities to make things better and efficient.
• Ensure code quality and reliability through automated test implementations.
• View frontend as Engineering i.e, plan & implement components for reusability, testability
  and scalability.
• Nice to have, experience in using Figma/Sketch for quick mockups & prototypes
• Nice to have knowledge of cache busting, CSRF, XSS attacks.

• Integrate data from various back-end services and databases
• Gather and refine specifications and requirements based on technical needs
• Create and maintain software documentation
• Stay plugged into emerging technologies/industry trends and apply them into operations and activities

What are we looking for in the Ideal Candidate?

• Proficient in creating Web (Responsive) applications using Angular 8+, AngularJS/ React JS, JavaScript, JQuery.
• Experience developing/consuming REST APIs
• Knowledge of multiple back-end languages (e.g. Python) and JavaScript frameworks (e.g. Node.js)
• Familiarity with databases (e.g.MSSQL, MySQL), and UI/UX design
• Hands-on experience with code versioning systems like Git, SVN.
• A clear understanding of client requirements & design specifications
• Aggressive problem diagnosis and creative problem-solving skills
• Ability to work and thrive in a fast-paced environment, learn rapidly, and master diverse web technologies and techniques.

Attributes:

• Team player, Positive Attitude
• Proven ability to work well with others in a fast-paced, iterative product definition and development environment.
• Able to work independently with little direct supervision and take initiative and willing to mentor and solve problems

• Write high quality code in ReactJS using TypeScript or JSX that is easy to maintain and test.
• Participate in an Agile environment using Scrum software development practices, Automated unit testing, Continuous integration, Code reviews, Version control systems, Automated build processes. Raise issues proactively that might impact delivery commitments.
• Fix production issues and maintain the code as needed .

• BS degree in CS or equivalent work experience 5+ years professional experience building single page applications in ReactJS using TypeScript or JSX with extensive experience working with HTML5 and CSS3.
• Experience working with cross-browser behaviors and quirks.

• Passion for new technologies. Product development experience building large scale web applications.
• Experience designing and developing highly scalable consumer facing web application. Care deeply about writing high-performance, reusable code for components that will be used across our product.
• GraphQL experience is preferred.