ReactJS Developer at Semperfi Services and Solutions · Remote, Bengaluru (Bangalore) · 3 - 8 years · ₹6L - ₹13L / yr · Bootstrapped · Remote friendly · Posted 26 Aug 2022
- Write effective, scalable code
- Develop Connectors tool GUI for various source and target systems/platform/products
- Test, debug, build and deploy UI components in the existing product
- Improve functionality of existing SDK/Frameworks
Skills required :
- JavaScript
- ReactJS
- Redux-Saga
- ES6 (or TypeScript) syntax
- Good problem-solving
- Good debugging
Good to have :
- TypeScript experience
- Material UI experience
- JEST knowledge
- Git and Github/Gitlab/Bitbucket experience

About Semperfi Services and Solutions
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Responsibilities
Ability to work on a cross-functional team within a very agile team, delivering on time and with high quality
Adjusts and defines new processes as they arise due to known and unknown customer/engineering requirements as it relates to frontend web development
Provides feedback on frontend architecture, code organization and CI/CD infrastructure for the team
Staying up to date with the best practices and future frontend development
Provides frontend leadership expertise and mentoring to other developers on not only the team, but the engineering organization as a whole
Takes pride in delivering ground breaking UI to web applications
Working closely with UX designers to turn their ideas into reality as it relates to creating visualizations for next generation cybersecurity
Qualifications
Proficient in developing large REACT Web Applications
Experience with Django applications
Proficient with TypeScript
Experience with Postgres or other relational database(s)
Experience developing REST APIs with authentication and scaling
Familiarity with some ORM (Object Relational Mapper) libraries
Cloud computing architectures (AWS, Azure, Google Cloud)
Experience with Docker a plus
Company Overview
VC-backed Fintech startup with an innovative online trading application seeking an experienced Frontend Engineer to join our growing team.
We're based out of UK and have our engineering team in India.
Job Description
We are looking for a great JavaScript developer who is proficient with React.js. Your primary focus will be on developing user interface components and implementing them following well-known React.js workflows (such as Flux or Redux). You will ensure that these components and the overall application are robust and easy to maintain. You will coordinate with the rest of the team working on different layers of the infrastructure. Therefore, a commitment to collaborative problem solving, sophisticated design, and quality product is important.
Responsibilities
- Developing new user-facing features using React.js
- Building reusable components and front-end libraries for future use
- Translating designs and wireframes into high quality code
- Optimizing components for maximum performance across a vast array of web-capable devices and browsers
- Maintain existing React systems, including fixing bugs
- Handling backend infra written in Next/Node/Express
Skills
- Strong proficiency in debugging, JavaScript, including DOM manipulation and the JavaScript object model
- Thorough understanding of React.js and its core principles
- Experience with popular React.js workflows (such as Flux or Redux)
- Familiarity with newer specifications of EcmaScript
- Experience with data structure libraries (e.g., Immutable.js)
- Knowledge of isomorphic React is a plus
- Knowledge of isomorphic Next js and Node js is a plus
- Familiarity with RESTful APIs
- Knowledge of modern authorization mechanisms, such as JSON Web Token
- Familiarity with modern front-end build pipelines and tools
- Experience with common front-end development tools such as Babel, Webpack, NPM, etc.
- Familiarity with basic authentication mechanism and security
- Ability to understand business requirements and translate them into technical requirements
- A knack for benchmarking and optimization
- Familiarity with code versioning tools such as Git
[Please note: Our HQ is in Wales and we're in the process of creating an Indian Entity. This means that the candidate will be responsible for all Tax related compliances until the entity is setup.]
- Strong proficiency in React Native and JavaScript (ES6+).
- Experience with Redux, Context API, or other state management tools.
- Familiarity with TypeScript and strong understanding of mobile app architecture.
- Knowledge of native build tools like Xcode and Android Studio.
- Experience with RESTful APIs and third-party libraries.
- Familiarity with GraphQL is a plus.
- Hands-on experience in implementing pixel-perfect designs and animations.
- Proficiency in using libraries like React Navigation, NativeBase, or Material-UI.
- Experience with testing libraries like Jest, Detox, or Appium.
- Strong debugging skills using tools like Chrome DevTools, Flipper, or similar.
- Experience deploying apps to the App Store and Google Play Store, including managing certificates and provisioning profiles
We are looking for a good JavaScript developer who is proficient with React.js. Your primary focus will be on developing user interface components and implementing them following well-known React.js workflows (such as Flux or Redux). You will ensure that these components and the overall application are robust and easy to maintain. You will coordinate with the rest of the team working on different layers of the infrastructure. Therefore, a commitment to collaborative problem solving, sophisticated design, and quality product is important.
Requirements
- 3+ years of experience in React JS and Redux
- Expert in React.j, ideally using TypeScript language extensions
- Good understanding of JavaScript Design Patterns
- Good experience writing front-end test cases
- Exposure in React Native is preferred.
- HTML5, CSS3 and Responsive web design are mandatory
- Exposure to Scrum methodology and XP technical practices such as unit testing, pair programming, test-driven development, continuous integration or continuous delivery
- Self-motivated, fast learner, detail-oriented, team player and a sense of humour

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.
● Participate in requirements analysis
● Building interactive consumer data from multiple systems and REST fully abstract to the UI through a Node.js backend
● Ensure the best possible performance, quality, and responsiveness of applications
● Test Driven Development
● Address and improve any technical issue.
● Support the implementation of developed software solutions
Skills required:
● Strong understanding of object-oriented programming
● Knowledge of NodeJS, ExpressJS
● React.js/ Next.js / Node.js / Mongo DB
● Javascript, Jquery, HTML, CSS, Bootstrap
● Understanding of Agile methodologies
● Hands-on experience with JavaScript Development on both client and server-side
● Proficient understanding of code versioning tools.
Good to have:
● AWS and/or Azure Services
● Git Setup
● Experience with cloud technologies
● Familiar with various design and architectural patterns
- Portfolio is must for the profile.
- Good understanding of Javascript, CSS, HTML5, AJAX.
- Hands on with React JS.
- Understanding of responsive frameworks such as BootStrap or SemanticUI.
- Extensive knowledge of DOM scripting with native JavaScript and JS frameworks such as jQuery.
- Experience in delivering Cross-browser and cross platform compatible solutions.
- Basic knowledge of UI design.
- Excellent problem-solving and analytical abilities.
- Experience with agile development practices such as continuous integration and deployment.
- Fluency with version control platform Git.
- Minimum 1+ years of UI development experience.
Main Responsibilities
- Develop new product features and new applications within an Agile
- Build reusable code and libraries for future
- Write well-designed, testable, efficient code using the latest development best
- Collaborate with designers to implement and improve design
- Optimize applications for maximum speed and
- Stay up-to-date on emerging
- Contribute to the continuous improvement of the development
Requirements
- Passion to build world class UI design
- 5+ years of experience developing web applications with modern JavaScript programming frameworks, tooling and libraries (such as Backbone, Angular, React, Vue.js, Ember) and CSS pre-processing frameworks (such as Sass or Less)
- Minimum one-year experience in developing js applications in team environment.
- Experience with state management frameworks like Redux
- Experience writing unit tests
- Familiarity with common front-end development tools such as Babel, Webpack, gulp, npm- scripts
- Any experience building, launching or supporting a SaaS product
In this role you will
- Be a part of a small UI team and will work closely with the UXdesigner and product manager to shape the product design.
- Build web UI components for a cloud-native SaaS product.
- Drive clear requirements for the backend APIs working closely withthe backend engineers.
- Focus on quality and velocity by developing appropriate tests.
Requirements
- Highly motivated self-starter with a builder’s mindset.
- 5+ years of web UI development experience.
- Highly skilled in JavaScript, HTML and CSS.
- Deep knowledge and experience of REST APIs.
Preferred: experience with frameworks such as React
Preferred: full stack development experience







