ReactJS Developer

Company

Stackera is a leading Fintech Development Services company located in Pune. We are dedicated to delivering quality and innovative solutions to our clients with seamless service.

About the Role

We are looking for a Frontend Developer who is highly skilled in Next.js and modern JavaScript frameworks to join our frontend engineering team. This role is ideal for someone who is passionate about building user-friendly interfaces that are fast, responsive, and scalable.

You’ll be working on high-impact fintech products that require both technical excellence and creative thinking. Your work will directly influence user experience and engagement across a range of web applications, including financial dashboards, analytics platforms, and client portals.

What You’ll Do

• Design, develop, and maintain modern web applications using Next.js, React.js, and associated technologies.
• Collaborate with cross-functional teams including backend developers, UI/UX designers, and product owners.
• Translate UI/UX design wireframes into high-quality code with pixel-perfect accuracy.
• Build responsive, accessible, and cross-browser compatible components.
• Optimize application performance for speed, scalability, and usability.
• Integrate front-end logic with RESTful APIs and real-time systems (e.g., WebSockets).
• Write clean, reusable code and maintain clear documentation.
• Participate in sprint planning, daily stand-ups, and code reviews to ensure continuous improvement.
• Ensure security best practices in frontend implementation.

Required Qualifications

• Bachelor’s degree in Computer Science, Information Technology, or a related field.
• 5+ years of hands-on experience in frontend development using Next.js and React.js.
• Proficient in Redux, Hooks, Context API, and component-based architecture.
• Solid understanding of HTML5, CSS3, JavaScript (ES6+), and responsive design principles.
• Experience building high-performance web applications with real-time data updates.
• Familiarity with frontend testing frameworks like Jest, Cypress, or similar.
• Ability to work in an agile environment with CI/CD processes.

Preferred (Good to Have)

• Exposure to Web3 technologies
• Experience with Ethereum, Solana, or other blockchain ecosystems.
• Understanding of containerized deployment using Docker.
• Familiarity with CI/CD tools like GitHub Actions, Jenkins, or GitLab CI.

What We Offer

• A collaborative and supportive team environment
• Exposure to cutting-edge projects in fintech and emerging tech
• Freedom to innovate and bring ideas to life
• Competitive compensation and performance-based growth
• Flexible work hours and focus on work-life balance

About us

Founded in 2018, Seventh Triangle is a Direct to Consumer enabler and Digital Transformation Agency. As a Shopify Plus Partner in India, we collaborate with top enterprise brands including Jockey, Titan, Nykaa, and V-Guard to achieve Revenue & Profitability growth using Data, Technology and Marketing interventions. With 120+ team members across Noida and Bengaluru, we’re known for driving measurable eCommerce success in the D2C and Shopify space. At Seventh Triangle, we help D2C businesses primarily with four service stacks which are Technology (Store Migration, Revamp, CRO and monthly maintenance), UI & UX, Growth Marketing (Performance, Retention and SEO) and Data Analytics (Management Dashboards).

Role Overview

We are seeking a skilled Shopify Frontend Developer with 2–4 years of experience. The ideal candidate will build engaging, responsive, and high-performing eCommerce experiences using Shopify themes and modern frontend technologies.

Key Responsibilities

• Develop and customize Shopify themes using Liquid, HTML, CSS, and JavaScript
• Understand client requirements and provide technical solutions and effort estimates
• Convert Figma/XD designs into functional and visually accurate Shopify pages
• Build responsive, mobile-first experiences for all device types
• Optimize website speed, including Core Web Vitals and performance metrics
• Implement custom features using Shopify APIs and third-party integrations
• Ensure SEO best practices and web accessibility standards
• Troubleshoot and debug frontend issues across browsers and devices
• Stay updated on Shopify platform developments and eCommerce trends

Required Qualifications

• Experience: 2–4 years in Shopify frontend/theme development
• Shopify Expertise: Strong knowledge of Liquid and theme customization
• Proven experience customizing paid themes like Impulse, Prestige, Motion, Impact
• Hands-on expertise with Dawn and Horizon, including architecture-level understanding
• Strong skills in HTML5, CSS3, JavaScript (ES6+), responsive design
• Experience with modern frameworks like React or Vue.js
• Proficiency with Git and collaborative development workflows
• Strong understanding of web performance optimization
• Ability to ensure cross-browser compatibility

Technical Skills

• Shopify Liquid
• HTML5, CSS3, JavaScript (ES6+)
• Responsive & mobile-first development
• REST APIs, AJAX
• jQuery & modern JS frameworks
• Git, GitHub
• Chrome DevTools & debugging
• Shopify theme customization & app integrations

Soft Skills

• Strong problem-solving and attention to detail
• Excellent communication and teamwork abilities
• Ability to manage multiple projects and deadlines
• Self-motivated with a learning mindset
• Good understanding of eCommerce UX and customer journeys

What does the core role include?

• Designing and developing high-volume, low-latency applications for mission-critical systems and delivering high-availability and performance
• Designing stateless components in React Native
• Contributing in all phases of the development lifecycle
• Working with the developers to create and maintain a robust framework to support the apps
• Working with the developers to build the interface with a focus on usability features
• 
  

What else can you expect in the role?

• Prepare and produce releases of software components
• Optimizing performance for the apps
• Problem-solving skills, analytical mind, and positive attitude
• Ability to think from end users perspective and focused on improving the overall product experience.
• Deliver across the entire app life cycle concept, design, build, deploy, test, release to app stores and support
• 
  

What can fetch you brownie points?

• Hands on experience with React Native is required
• Hands-on experience in React Native APIs, ReactJS, Javascript, ECMAScript (OOJS) and JSX.
• Strong understanding of JavaScript ecosystem
• Hands on experience on Android in creating Hybrid / Native applications
• Demonstrable UI/UX experience on a large-scale app.
• Thorough understanding of React Native development tools like IDEs (Nuclide, Atom, Sublime Text, or Visual
• Good knowledge of JS frameworks like ReactJS is a plus.

Desired Skills and Experience

Hybrid Apps,React Native, Native iOS and Android Architecture understanding

About us:

HappyFox is a software-as-a-service (SaaS) support platform. We offer an enterprise-grade help desk ticketing system and intuitively designed live chat software.

We serve over 12,000 companies in 70+ countries. HappyFox is used by companies that span across education, media, e-commerce, retail, information technology, manufacturing, non-profit, government and many other verticals that have an internal or external support function.

To know more, Visit! - https://www.happyfox.com/

We’re looking for an experienced Technical Lead – Frontend Engineer to join our growing engineering team to help build and maintain HappyFox’s product offerings. 

What you can expect as a Technical Lead at HappyFox:

• You will consistently ship features and improvements and lead a team of engineers working on our product roadmap.
• You will oversee software architecture, Git workflows, and CI/CD processes and perform code reviews to ensure exceptional code quality.
• You will actively work towards identifying, minimizing, and managing technical debt in the codebase.
• You will improve the development experience and the quality of the codebase. 
• You will define our internal standards for coding style, maintainability, and best practices for a large-scale web application. 
• You will uphold the best practices and coding standards for the team through code review and technical feedback.
• You will take responsibility for key technical architecture and design decisions.
• You will take ownership of the stability and performance of the services that you work on.
• You will contribute to the strategic vision and long-term roadmap in your area of expertise.

You should apply if:

• You have 2+ years of experience in a technical lead role designing and building single-page web applications.
• You have 8+ years of relevant professional experience in building web applications with javascript frameworks like Ember.js or React.js.
• You have deep knowledge of HTML, CSS, and JavaScript
• You have experience building single-page apps and a good understanding of the best practices and coding patterns.
• You have a passion to dig into technically complex problems to troubleshoot and figure out a solution.
• You have a desire to continuously improve and ship the best quality product.
• You have a pragmatic approach to making sure technical decisions align with actual business needs.
• You have a good understanding of the trade-offs when building for product value, reliability, or performance.
• You have excellent communication skills with the ability to discuss and explain your point of view clearly and effectively.

Position: React JS Developer

Location: Chennai/Bangalore

Experience: 3-5 Years

Job Responsibilities:

• 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 codes using JavaScript following React.js workflows.
• Troubleshooting interface software and debugging application codes.
• Developing and implementing front-end architecture to support user interface concepts.
• Monitoring and improving front-end performance.
• Building reusable code and libraries for future use
• Collaborating with other team members.
• Supporting software deployment and provide post production support (as and when needed)
• Documenting application changes and developing updates.

Required Skills:

• 3-5 years of experience developing and implementing software applications.
• Previous experience working as a React.js Developer.
• Knowledge in e-Commerce domain will be a plus.
• In-depth knowledge of JavaScript, CSS, HTML and front-end languages.
• Knowledge of REACT tools including React.js, Webpack, Enzyme, Redux, and Flux.
• Experience with REST API's 
• In-depth understanding of Javascript, the DOM, and relevant concepts.
• Knowledge of modern authorization mechanisms, such as JSON Web Token. 
• Experience with user interface design.
• Proficient understanding of cross-browser compatibility issues and ways to work around them.
• Experience with browser-based debugging and performance testing software.
• Proficient understanding of code versioning tools, such as Git, Github.
• Excellent troubleshooting skills.

Responsibilities:

• Build the foundation of our supply side (enterprise) product from scratch. Maintain high standards of pixel perfect Ui’s and efficient User Experiences. 
• Our Supply Side ecosystem involves a plethora of products such as Catalog Management, Analytics Dashboard, Orders Processing, Finance Reconciliation, Notification centres etc. Develop a deep understanding of the mentioned use cases and build the systems for scale.
• Coordinate with Product managers, Product Designers & Backend Developers and outline sprints and tasks on a weekly basis.
• Conduct Comprehensive Unit tests before passing features to QAs. This requires a good top level understanding of backend infrastructure.
• Maintain High level of Code Quality and constantly optimize for performance and user experience.
• Be Collaborative. Self reliant and always keep pushing the limits of your knowledge.