
· 7+ years of professional experience in front-end development.
· 5+ years of hands-on experience with React.js and its ecosystem (Redux, Context API, Hooks, etc.)
· Strong understanding of JavaScript (ES6+), HTML5, and CSS3.
· Experience with RESTful APIs, GraphQL, and WebSocket integration.
· Proficiency in modern build tools (Webpack, Vite, Babel, etc.).
· Expertise in state management libraries (Redux, MobX) and React Query.
· Solid understanding of UI/UX principles and responsive design.
· Experience with testing frameworks (Jest, React Testing Library, Cypress, etc.).
· Familiarity with modern CI/CD pipelines and version control tools (Git).

About Wissen Technology
About
The Wissen Group was founded in the year 2000. Wissen Technology, a part of Wissen Group, was established in the year 2015. Wissen Technology is a specialized technology company that delivers high-end consulting for organizations in the Banking & Finance, Telecom, and Healthcare domains.
With offices in US, India, UK, Australia, Mexico, and Canada, we offer an array of services including Application Development, Artificial Intelligence & Machine Learning, Big Data & Analytics, Visualization & Business Intelligence, Robotic Process Automation, Cloud, Mobility, Agile & DevOps, Quality Assurance & Test Automation.
Leveraging our multi-site operations in the USA and India and availability of world-class infrastructure, we offer a combination of on-site, off-site and offshore service models. Our technical competencies, proactive management approach, proven methodologies, committed support and the ability to quickly react to urgent needs make us a valued partner for any kind of Digital Enablement Services, Managed Services, or Business Services.
We believe that the technology and thought leadership that we command in the industry is the direct result of the kind of people we have been able to attract, to form this organization (you are one of them!).
Our workforce consists of 1000+ highly skilled professionals, with leadership and senior management executives who have graduated from Ivy League Universities like MIT, Wharton, IITs, IIMs, and BITS and with rich work experience in some of the biggest companies in the world.
Wissen Technology has been certified as a Great Place to Work®. The technology and thought leadership that the company commands in the industry is the direct result of the kind of people Wissen has been able to attract. Wissen is committed to providing them the best possible opportunities and careers, which extends to providing the best possible experience and value to our clients.
Connect with the team
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Role Summary: Front-end Developer who would contribute towards building a highly flexible and scalable front-end by bringing deep core technology expertise.
Job Description:
- Ensure proper offline access using service workers and PWA
- Develop components which are SEO friendly
- Have experience in server-side rendering
- Drive evolution of application performance
- Ensure project scalability by having good project architecture
Skill Requirements:
- Good experience in HTML5, CSS3, JS
- React
- React native
- Angular
- Redux exposure
- Have handled service workers and PWA caching and updates
- CSS pre-processors knowledge like sass
- Knowledge of webpack, parcel, grunt etc.
-Knowledge of pre-processors like SASS/LESS, CSS-Modules.
- Architecting and automating the build process for production, using task runners or scripts (Gulp / Grunt)
-Have an eye for good UI/UX, Progressive Web Apps, Responsive Design
-Interested in writing code, actively experimenting along with learning new things.
Individual applying to the role should ideally have the following attributes
- 2+ years of experience
-Passionate about Frontend Development and continually follow the platform & innovations
-Strong and innovative approach to problem solving and finding solutions
-Interested in working on fast-paced
- Excellent communicator (written and verbal, formal and informal)
- Flexible and proactive/self-motivated working style with strong personal ownership of problem resolution
- Ability to multi-task under pressure and work independently with minimal supervision.
- Ability to prioritize when under pressure.
🌟 About Us:
We create AI solutions for hospitals, combining scientific rigor with startup agility.
iON Health's SmartAI is an AI-powered tool developed to help clinicians interact with a patient's medical record using natural language, transforming how healthcare providers access and synthesize clinical data
Founded by serial entrepreneurs with more than 15 successful exits, we offer the opportunity to work alongside elite engineers, clinicians, and product innovators to improve the health of millions of patients each year.
🎯 What We’re Looking For:
- 7+ years of experience with React.js (front-end) and Node.js/Express (back-end).
- Solid understanding of relational and NoSQL databases (e.g., PostgreSQL, MongoDB).
- Experience with cloud platforms (AWS/GCP/Azure) and CI/CD pipelines.
- Comfort working in fast-paced, ambiguous environments with high ownership.
- Prior experience in AI/ML, healthcare, or enterprise software.
- Must Have: Bachelors in Engineering from IIT/NIT/IIIT or similar institutions.
- Good to have: Experience in AI focused startups, early-stage teams, or as a founding engineer.
🛠 What You’ll Do:
- Design, develop, and deploy scalable web applications across the stack (front-end + back-end).
- Collaborate with founders, designers, and other engineers to take features from concept to production.
- Write clean, maintainable, and efficient code using [React.js, Node.js, TypeScript, or your tech stack].
- Work on database design and API development (REST/GraphQL).
- Optimize applications for maximum speed and scalability.
- Contribute to architectural decisions and set up best practices for the team.
- Be hands-on with debugging, testing, and performance tuning.
💡 Why Join Us?
- Work alongside elite engineers, clinicians, and product innovators
- Competitive salary + equity options (you’ll grow as the company grows)
- Fast decision-making and zero bureaucracy
- Shape the future of AI in healthcare
Avegen is a digital healthcare company empowering individuals to take control of their health and supporting healthcare professionals in delivering life-changing care. Avegen’s core product, HealthMachine®, is a cloud-hosted, next-generation digital healthcare engine for pioneers in digital healthcare, including healthcare providers and pharmaceutical companies, to deploy high-quality robust digital care solutions efficiently and effectively. We are ISO27001, ISO13485, and Cyber Essentials certified; and compliant with the NHS Data Protection Toolkit and GDPR.
Job Summary:
Senior Software Engineer will be responsible for developing, designing, and maintaining the core framework of mobile applications for our platform. This includes tasks such as creating and implementing new features, troubleshooting and debugging any issues, optimizing the performance of the app, collaborating with cross-functional teams, and staying current with the latest advancements in React Native and mobile app development. We are looking for exceptional candidates who have an in-depth understanding of React, JavaScript, and TypeScript, can create pixel-perfect UI, and are obsessed with creating the best experiences for end users.
Your responsibilities include:
- Architect and build performant mobile applications on both iOS and Android platforms using React Native.
- Work with managers to provide technical consultation and assist in defining the scope and sizing of work.
- Maintain compliance with standards such as ISO 27001, ISO 13485, and Cyber Essentials that Avegen adheres to.
- Lead configuration of our platform HealthMachine™ in line with functional specifications and development of platform modules with a focus on quality and performance.
- Write well-documented, clean Javascript/TypeScript code to build reusable components in the platform.
- Maintain code, write automated tests, and assist DevOps in CI/CD to ensure the product is of the highest quality.
- Lead by example in best practices for software design and quality. You will stay current with tools and technologies to seek out the best needed for the job.
- Train team members on software design principles and emerging technologies by taking regular engineering workshops.
Requirements:
- Hands-on experience working in a product company developing consumer-facing mobile apps that are deployed and currently in use in production. He/she must have at least 3 mobile apps live in the Apple App Store/Google Play Store.
- Proven ability to mentor junior engineers to realize a delivery goal.
- Solid attention to detail, problem-solving, and analytical skills & excellent troubleshooting skills.
- In-depth understanding of React and its ecosystem with the latest features.
- Experience in writing modular, reusable custom JavaScript/TypeScript modules that scale well for high-volume applications.
- Strong familiarity with native development tools such as Xcode and Android Studio.
- A positive, “can do” attitude who isn’t afraid to lead the complex React Native implementations.
- Experience in building mobile apps with intensive server communication (REST APIs, GraphQL, WebSockets, etc.).
- Self-starter, able to work in a fast-paced, deadline-driven environment with multiple priorities.
- Excellent command of version control systems like Git.
- Working in Agile/SCRUM methodology, understanding of the application life cycle, and experience working on project management tools like Atlassian JIRA.
- Good command of the Unix operating system and understanding of cloud computing platforms like AWS, GCP, Azure, etc.
- Hands-on experience in database technologies including RDBMS and NoSQL and a firm grasp of data models and ER diagrams.
- Open source contributions and experience developing your own React Native wrappers for native functionality is a plus.
Qualification:
BE/BTech/MS in Information Technology, Computer Science, or a related discipline.
technologies namely Blockchain, Machine Learning & Artificial Intelligence, Complex mobile & Web
Apps, IoT, etc.Rejolut is a venture-backed company with clients in over several countries namely
Malaysia Airlines,gba global,my-earth,biomes, Dlg-hub,etc.
We are looking for Tech geeks having hands-on experience and in love with building scalable, distributed and large web/mobile products and tech solutions. He/She must be an excellent problem solver with passion to self-learn and implement web technologies (frontend + backend). He/She would be responsible for the architecture design, code review, and technology build and deployment activities of the product.
Required Skills:-
Knowledge of JavaScript
Experience with web development using HTML, JavaScript ,Jquery, CSS 3.
Experience building Responsive Design layouts using a formal framework like BootStrap
Familiar with best practices (ensuring browser & device compatibility, etc.)
Basic understanding of server-side CSS pre-processing platforms, such as LESS and SASS
Understanding of asynchronous request handling, partial page updates, and AJAX
Basic understanding of web development and hands-on integration experience
Clean coding style with clear separating of UI and functionality.
Building reusable components and front-end libraries for future use
Rejolut - As a Career Differentiator
- We are a young and dynamic team who are obsessed with solving futuristic and evolutionary business problems at scale with the next generation technology like blockchain, crypto and machine learning. Focuses on empowering people across the globe to be technically efficient, making advancements in technology and providing new capabilities that were previously thought impossible.
- We provide exposure to higher learning opportunities so that you can work on complex and cutting edge technology like React, React Native, Flutter, NodeJS, Python, Go, Svelte, WebAssembly. Strong expertise in blockchain and crypto technology and working with the networks like Hedera Hashgraph, Tezos, BlockApps, Algorand, Cardano.
- We maintain high end transparency with clients and employees as visibility unlocks Efficiency and trust unlocks Visibility.
- Company is backed by two technology Co-founders, well-versed with consumer applications and their work has been downloaded millions of times and have led teams in leadership positions in companies like Samsung, Purplle, Loylty Rewardz.
Benefits :
> Health Insurance
> Fast growth and more visibility into the company
> Experience to work on the latest technology
> Competitive Learning Environment with supportive co-workers
> Employee friendly HR Policies
> Paid leaves up to certain limits
> Competitive salaries & Bonuses
> Liberal working atmosphere
> Get mentored by the best in the industry
Schedule:
Day Shift/Flexible working hours
Monday to Friday
• Technical end-to-end design for stories by collaborating with business analyst/product owner, technical architect and clients
• Implement stories end-to-end, which includes Frontend, Backends for Frontend (BFF), Caching and also service orchestration in some cases) using best engineering practices like test-driven development, SOLID principles and consideration of non-functional requirements like performance, scalability, security or cloud readiness (as applicable) at the story level
• Automates testing at unit, module and integration level as needed using tools relevant for the platform (e.g. Jasmine, Jest, Karma, Webdriver.io etc.)
• Focus on quality by implementing best practices like logging, calling out technical debt, meeting KPIs using code quality tools like SonarQube, ESLint (customize and sync with Sonar), Stylelint/Sasslint and so on.
• Hands-on with automating redundant work, like common component structure, both in terms of scaffolding as well as using the right design patterns / creating abstractions.
• Mentor junior engineers in helping review code, guiding on technical decision making
Key Requirements:
• 4-9 years’ experience
• Hands-on knowledge of HTML5, CSS3, JavaScript
• Hands-on experience working with Object Oriented JavaScript (OOJS), JavaScript - and practical uses in building complex interactive experiences, primarily with ECMAScript 2015+. You should be up-to-date with new specifications (different stages), and also, using transpilers like Babel to use features from all stages
• Good understanding of creational and structural design patterns in JavaScript
• Experience working with Single Page Applications (SPA) with universal rendering capabilities.
• Good understanding of React.js, its core principles - lifecycle methods, virtual DOM etc. and at least 6 – 12 months hands-on experience with the same
• Understanding of one-way data flow and the Flux architecture.
• Understanding of stateful (container) vs stateless (presentational) components and how to break down the application page into components
• Core understanding of how React’s state management works out of the box.
• Understanding of different CSS architectures that go hand-in-hand with React.js application development. Pros and cons of component-level CSS vs global and where to apply each
• Thorough understanding of Webpack bundler (version 2+).
• Good understanding of the Web Components standard.
• Hands-on experience with building Progressive Web Apps (PWAs) on any framework.
• Hands-on experience with Frontend Performance Optimization – especially in a React application with respect to resource loading strategy, CPU/Memory profiling on the browser.
• Hands-on experience with test-driven development using Jest or equivalent. Familiar with snapshot testing, code coverage. Experience working with utilities like Enzyme
• Experience using fluid grids, and building responsive/adaptive websites using Bootstrap etc.
• Understanding of SEO and accessibility and making it part of the development workflow
• Moderate to Strong graphics manipulation/optimization skills using Photoshop is a plus.
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.
At the moment, we are looking for engineers for our Bangalore office.
- Should be capable of applying software design patterns and object-oriented design to solve problems in front end development.
- Deep expertise in converting visual design into web application using CSS, LESS/SASS pre-processors and strong knowledge on cross-browser compatibility.
- Good knowledge of Responsive and Adaptive web designs using media queries, bootstrap and other frameworks and grid systems.
- Deep functional knowledge or hands-on design experience with Web Services (REST, SOAP, etc.) is needed to be successful in this position.
- Strong grasp of security principles and how they apply to web applications and web sites.
- Proficient understanding of code versioning tools, such as (Git / Mercurial / SVN).











