Frontend Engineer at Koinex · Mumbai, Bengaluru (Bangalore) · 0 - 2 years · ₹7L - ₹16L / yr · Raised funding · Posted 26 Nov 2018

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We are looking for a Senior Mobile Developer with deep React Native expertise to lead feature development on our investor-facing and advisor-facing mobile applications. You will own critical mobile modules end-to-end — from architecture through App Store release — and actively integrate AI capabilities into the mobile experience.
Key Responsibilities
● Design and develop high-quality, production-grade React Native features for iOS and Android apps serving retail investors and wealth advisors.
● Own module-level architecture decisions: navigation, state management, offline handling, performance optimisation, and security.
● Integrate with backend APIs for real-time portfolio data, transaction processing, KYC workflows (Digilocker, V-CIP, eSign), UPI, and payment flows.
● Implement AI-powered mobile features: intelligent recommendations, conversational interfaces, AI-assisted portfolio insights, and smart alerts.
● Write unit tests, integration tests, and E2E tests; maintain high coverage on critical modules.
● Conduct thorough code reviews; mentor junior and mid-level mobile engineers.
● Optimise app performance: startup time, frame rates, memory profiling, and battery usage.
● Manage app release pipelines: CI/CD, TestFlight/Play Console beta, App Store/Play Store deployment, and OTA updates.
● Collaborate with Product, Design (Figma), and Backend teams in Agile sprints.
Required Qualifications
● 4–8 years of mobile development experience with 3+ years in production React Native apps.
● Strong JavaScript/TypeScript fundamentals; deep understanding of React hooks, context, and performance patterns.
● Experience with state management (Redux Toolkit, Zustand, or Jotai) and navigation (React Navigation v6+).
● Hands-on with native modules/bridging when React Native abstractions are insufficient.
● Experience with mobile CI/CD (Fastlane, GitHub Actions, Bitrise, or equivalent).
● Knowledge of mobile app security: certificate pinning, biometric auth, secure storage, jailbreak/root detection.
● B.Tech / B.E. in Computer Science or equivalent from a reputed institution.
Good to Have
● Experience in fintech or BFSI mobile apps — MF transaction apps, trading apps, insurance apps, or payment apps.
● Familiarity with SEBI/AMFI/IRDAI compliance requirements for digital financial products.
● Exposure to LLM integration on mobile: streaming responses or AI assistant UX patterns.
● Experience with React Native New Architecture (Fabric, JSI, TurboModules).
AI Expectations
● Use AI coding assistants (GitHub Copilot, Cursor, Claude) as standard daily practice.
Senior Software Engineer (Frontend)
What you will be doing:
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Working with designers, product managers to collaboratively own the front-end layer at FalconBrick and deliver stellar end user experiences
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Building responsive and elegant mobile and desktop web UIs
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Test, debug and maintain the application software throughout the product lifecycle
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Architect, develop and maintain front-end libraries
What you need
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You love working with JavaScript and are very familiar with JavaScript design patterns and can build fairly complex UI
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Have at least 4 years’ experience in development of responsive web/mobile applications using advanced JS and web technologies
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And with at least 2 years of experience building frontend UI with a library or framework like ReactJS
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You’re very comfortable in writing HTML and CSS and love designing beautiful webpages
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You know the cost/constraints of the browser and network and are able to to improve the
performance of the product across devices.
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Have great communication skills, strong work ethics
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And are comfortable with agile, iterative development practices and code reviews
Preferred
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Are familiar with and writing automation / build scripts with (Grunt/Gulp/ webpack etc)
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Comfortable working across the full stack - Experience working with cross-functional
team with backend development using node.js/express (or similar)
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You keep pace with the ever changing specs of cutting edge front-end technologies (e.g.
HTTP/2, WebAssembly, Service Workers)
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Experience with leading a team doing frontend development
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Startup Experience is a plus
What you will get:
• An opportunity to work in a fast growing a startup on a product line that’s focused offering great user experiences through amazing UX/UI design and engineering
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A fun and casual work environment with flexible work hours
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Competitive incentives
Job Role –
React Developer
Location- Hyderabad
Job Description-
• Develop end-to-end features (full stack) for users and be proficient with aspects of design and coding.
• Proficiency in automated testing/testing methodologies is a must.
• Create, maintain, and modify (where necessary) the data structure.
• Work with product owners to handle backlogs and new requests.
• Work on React projects using specifies tools and databases.
• Should have very good understanding of the technical approach and its viability.
• Should be able to push back and accurately assess the viability of their solutions.
• Should be comfortable adopting testing frameworks and developing with common industry practices such as test-driven development.
Person Specifications/ Requirements
• Good understanding and proven experience of web development and basic languages such as HTML and JavaScript.
• Strong programming experience.
• Must have experience with React.js, Node.js.
• Experience with Vue.js and Go is required.
• Strong understanding of software development tools, data structures and data modelling.
• Strong Data Analytical Skills.
• Should have Knowledge and experience of databases, e.g., MS SQL, MongoDB.
• Comfortable with optimizing your code and refactoring where necessary, researching ways to have responsive solutions.
• Good understanding of Test-Driven Development (TDD), including benchmarking and refactoring during the TDD process.
• Familiarity with popular authorization techniques such as JSON Web Tokens (JWTs) is required.
• Strong understanding of the software development lifecycle and awareness of commercial deadlines.
• Strong self-discipline and detail-oriented, important to meet client requirements in pressured timelines to a high quality.
• Bachelor's level business related qualification or 2+ years relevant experience in a similar environment.
• Strong understanding of the software development lifecycle.
• Strong verbal and written communications skills.
• Inquisitive, enthusiastic, passionate, and diligent.
• Keen to develop a broad range of business, technical and soft skills
Role: Angular Developer
Positions: 4
- Experience 3 to 5 years
- Strong front-end development skills, experience with JavaScript libraries/frameworks mainly Angular JS Preferably Version 7 or Version 5
- Experience working with server-side JavaScript Frameworks and build tools (node.js, bower, grunt, gulp)
- Demonstrable experience developing large-scale applications using one or more MV* patterns (MVVM, MVC, MVP)
- Expertise in developing single page web applications using front-end routing, consuming JSON-based RESTful APIs, client-side templating
- Strong competency in responsive layouts leveraging CSS and media queries and related UI frameworks (e.g., Bootstrap, Foundation)
- Experience with CSS preprocessors (e.g., Sass, LESS)
- Experience with code analysis tools (e.g., JSLint, JSPerf)
- Practical knowledge of web page optimization techniques and guidelines for fast page load times
- Strong understanding of Ajax and/or promises
- Experience working in an agile, multidisciplinary team.
- Experience working with a distributed version control system (git, mercurial)
- Experience writing unit tests in one or more of the following: karma, mocha, chai, sinon, jasmine, jest
- Experience working on AWS. Basic understanding of Security Groups/ VPC etc.
- Experience on working with & integrating with microservices
- Experience on developing/ using CI/CD pipeline using Jenkins/ Git
Strong on typescript/java script.
Strong on agile methodology.
Should have knowledge on writing unit test cases using jasmine/jest
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Firm grasp of modern web application development approaches (Full stack JavaScript)
Strong proficiency in the following JavaScript development tools: · ReactJS · UI Frameworks (Bootstrap, Material UI, Semantic UI) · ES6/ES7 · Context API, GraphQL, Redux, Payment Gateway · Familiarity with RESTful APIs · Familiarity with code versioning tools (GIT, BitBucket) · Experience with working with various data structure (JSON) · Understanding of modularized / service-oriented architecture
Competencies and Skills Required · Requires excellent analytical, problem solving, and good communications skills · Must be able to work effectively with business stakeholders · Strong passion for delivering technical solutions to business problems · Understanding and mindset of Agile software delivery (Ability to adapt to continually changing priorities) · Team player who understands the importance of teamwork and collaboration · Passion for delivering new approaches and challenging the ‘status-quo’ |
● 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
- In this role, you will Design, Develop and Deploy applications based on HTML, ReactJS, JS as front-end. You are a creative and technically skilled individual responsible for bringing great user experience and design to life. You create reusable, extensible, flexible, high-performing web applications from front end to back end.
- Execute in an agile environment using industry standard tools and delivering weekly code releases Develop and test for cross browser, cross platform applications.
- Experience in product designing, distributed architecture.
- Have a demonstrated track record of End to End product engineering responsibility









