Sr. Javascript Developer / React.js

About the Role

We're looking for a Frontend Software Engineer (Web & Mobile) who thrives on ownership and execution. You will build and maintain our React.js web app and React Native mobile apps (iOS + Android) using TypeScript, working across the full frontend stack to deliver reliable, fast, and polished consumer experiences. 

This is not a ticket-taker role. You will own features end-to-endfrom understanding the user problem and collaborating on a solution, to shipping high-quality UI, monitoring outcomes, and iterating when needed. We're especially excited about engineers who have worked in consumer product startups, where speed, quality, and user empathy matter equally. 

If you value your time, avoid over-engineering, and love moving meaningful product metrics through great execution, you'll fit right in.

What You'll Do

Web Development (React.JS)

• Build and own responsive, modular, and high-performance web experiences using React.js + TypeScript. 
• Design reusable components and scalable state/data flows
• Own UI performance: reduce unnecessary renders, optimize bundles, improve caching, implement lazy loading and code splitting.
• Integrate securely with backend APIs and ensure robust error handling, loading states, and edge-case coverage.
• Deliver pixel-perfect UI aligned with product and design intent, ensuring accessibility and cross-browser reliability.

Mobile Development (React Native)

• Develop and maintain our React Native apps across iOS and Android with a strong focus on stability and UX polish. 
• Implement complex flows including navigation patterns, deep linking, background tasks, push notifications, and in-app updates.
• Work with device APIs, sensors, native modules, and third-party SDKs when needed.
• Build smooth, delightful mobile interactions through animations and gestures (Reanimated, Gesture Handler).
• Own performance excellence on mobile: optimize memory, FPS, bundle size, and rendering behavior.
• Manage the practical realities of consumer apps: CI/CD pipelines, OTA releases, store compliance, and version rollouts. 

Engineering Ownership & Execution

• Own features end-to-end: understand the user journey, clarify requirements, ship, and follow through until impact is achieved.
• Write clean, testable, and maintainable code with high standards for reliability.
• Collaborate closely with Product, Design, Backend, Care/Sales (as needed) to deliver aligned outcomes. 
• Participate actively in code reviewsraising the bar for quality and architecture.
• Investigate and fix real production issues quicklyperformance regressions, crashes, UI bugs, and behavioral edge cases.
• Improve frontend standards, tooling, and developer experience across both web and mobile.

What Success Looks Like

In the first few months, you'll be successful if you:

• Ship meaningful user-facing features independently with minimal hand-holding.
• Improve app/web experiences in ways that users feel (speed, stability, clarity, joy).
• Take responsibility for outcomes, not just output.
• Make pragmatic, time-respecting engineering decisions (solve the problem without unnecessary complexity).
• Become a reliable owner of key areas of the product.

Required Skills & Experience

• 3+ years of production experience with React.js
• Strong command over JavaScript (ES6+), TypeScript, HTML5 CSS3. 
• Proven experience deploying consumer-grade mobile apps: Play Store/App Store releases, OTA updates, build pipelines. 
• Solid understanding of:
• Component-driven UI architecture
• State management and async data patterns
• API integration and robust error handling
• Debugging and profiling tools (Flipper, Chrome DevTools, Xcode, Android Studio)
• Comfortable with Git, CI/CD workflows, and agile/iterative product development. 
• Strong product and UX senseable to spot friction and propose improvements, not just implement screens.

Nice to Have

• Prior experience in consumer product startups (apps where UX, retention, and speed matter). 
• Experience building custom native modules
• Experience with monitoring/analytics tools (Sentry, Crashlytics, Firebase, Mixpanel, etc. ).
• Exposure to real-time features (WebSockets, video/chat, live tracking).
• Experience with offline-first or low-connectivity user flows.

Traits We Strongly Value

• High ownership: you take problems from start to finish and care about what happens after launch. 
• Execution & results driven: you prioritize shipping real value, not perfect theories. 
• Time-respecting engineer: you don't over-engineeryour solutions are clean, practical, and scalable. 
• User empathy: you think from the consumer's perspective and advocate for simplicity and delight. 
• Startup mindset: comfortable with ambiguity, fast iteration, and wearing multiple hats when needed. 

What We Offer

• Opportunity to work across both web and mobile and own product experiences end-to-end.
• A fast-moving, collaborative engineering team where quality and execution both matter.
• Room to shape frontend standards, architecture, and product direction.
• Competitive compensation and benefits.

About Rocketlane

Rockeltane is a fast-growing SaaS startup in the customer onboarding category and has raised $21M in capital (https://twitter.com/RocketlaneHQ/status/1483821563195850753">we rapped about it!) from global VCs such as 8VC, Nexus Venture Partners, Matrix Partners India, and super angels like Gokul Rajaram and Girish Mathrubootham.

Thanks to the rapid early traction and customer love the product has garnered globally from the likes of LinkSquares, AppCues, ContractPodAI, Chargebee, parcelLab, etc., we have been recognized as a Leader in the Client Onboarding category on G2 within six months of product launch.

With a mission to deliver chaos-free, consistent, accelerated, and delightful customer journeys through its purpose-built software the company was founded in April 2020 by second-time entrepreneur trio - Srikrishnan, Vignesh, and Deepak. Previously, the trio built a successful in-app messaging startup that was acquired by Freshworks (NASDAQ: FRSH) in 2015.

Rocketlane became the https://www.producthunt.com/posts/rocketlane"> #1 Product of the Day on Product Hunt on the day we launched it. We are now building a global and diverse workplace that will empower passionate problem-solvers to innovate, collaborate, do their best work, and see the next phase of hyper-growth together! 

What’s the opportunity?

Are you a front-end developer looking to fast-track your learning and growth? Have you looked at world class products like Asana, Notion, or Airtable, and felt “I wish I were part of the early team that built these products”?

At Rocketlane, we’re a team that has previously built and rolled out globally successful SaaS products used by tens of thousands of customers. We’re laser focused on delivering a world class new product again, and looking for an ambitious front-end engineer to join our existing team of 9 engineers.

If it excites you to think of a fast paced start-up environment, building something big from scratch, breaking down new problems, creating well structured UI components, executing on pixel perfect design, paying great attention to every little interaction detail, and doing demos of your work every Friday with a happy and passionate team, then this is the right opportunity for you.

Some of the tech problems you get to work-on as a front-end developer would include building real-time collaboration experiences across our product, building live document editing and modern spreadsheet experiences from scratch, creating flexible new Kanban-style views of work tasks, and crafting cool new UI components and interactions that we will use across our product.

About you:

• Knowledge in the following areas
• React
• SPA Framework patterns
• Hands-on experience in HTML, CSS, SASS & Object Oriented Javascript
• Worked with features provided by browsers (Caching / Storage / Compatibility etc )
  
  

Nice to have:

• Familiarity with AWS
• Experience with startups or early stage teams
• Knowledge of module bundlers like Webpack 

What’s in it for me?

• Great opportunity: Rocketlane genuinely cares about everyone we hire. You’ll learn new things and grow no matter how experienced you are; you will be working with founders who have more than three decades of collective experience in building significant B2B SaaS startups. 
• Great team: Work with a world-class, high-velocity team that truly embodies the values of empathy, curiosity, and customer-centricity. Check out thehttps://www.linkedin.com/feed/hashtag/?keywords=rocketlane_meet_the_team"> MTT(Meet The Team) videos on our LinkedIn. 
• Great culture: An open, fun, and exciting startup culture that empowers its people to champion big problems with the freedom to think and innovate.
• Growth:  You could easily and quickly transition into other roles you might like.
• Impact: You get to be part of a global, passionate team in a fast-paced and growth-oriented environment. The team has a work philosophy of being high on ambition, ownership, and a bias for action.
• Monetary rewards and benefits: Competitive salary, flexible leave policy, and more! 

Key Responsibilities

• Design and Build complicated Workflow
• Understanding the user persona and deliver slick experience
• Experience in JavaScript (ReactJS / Redux) React Native, HTML, CSS, JQuery, HTTP
• Strong understating of XML, JSON, DOM, and w3c standards
• Providing technical expertise for every phase of the project lifecycle; from concept development to solution design, implementation, optimization and support
• Be an Interface with Stockholder sand architects to create technology specifications from business requirements for one or more modules within the project
• Responsible to prepare the technical design of the components within the module (one or more of client/web presentation tier, server tier, data access and data model, integration component, package function customization)
• Proficient in articulating the pros and cons of using a certain technology stack or component or design pattern versus another to the clients and project team and drives selection of technologies, designs to come up with the optimal architecture
• Drives the performance tuning, re-design and re-factoring for a module
• Contributes to designing and implementing the build, release process as well as system configuration and deployment characteristics of the application
• Implements (hands-on) the module components based on prevailing Framework and Open-source standards & its best practices.
• Mentors the team (people working on the module and other project team members) on technology concepts and best practices for design, implementation and other processes

We are looking for a skilled React.js Developer to join our front-end development team. 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.

To ensure success as a React.js Developer, you should have in-depth knowledge of JavaScript and React concepts, excellent front-end coding skills, and a good understanding of progressive web applications. Ultimately, a top-class React.js Developer should be able to design and build modern user interface components to enhance application performance.

We're looking for developers who are interested in solving problems. We like people who are willing to work across the technology spectrum. 

An example of a typical problem would be a product feature that requires UI/UX (Typescript/React/HTML/SCSS), server changes (Java/Scala/R), and database changes (MySQL).

You will own some or all of a product/feature. You will also mentor others, read and review code, maintain code, deploy code, tune the performance of systems, as required.

Requirements :

- We're looking for 4 years or more of relevant work experience. That being said, if you think you have the necessary skills to make the number irrelevant then do talk to us

- Proficiency in Java, JavaScript, and sufficient knowledge of database concepts to write efficient queries

- Working experience in one or more of React, Redux, Typescript, and associated tools such as Webpack, Grunt, Gulp etc.

- Working experience in HTML, (S)CSS

- Working experience writing unit/functional/integration tests

- Knowledge of Java 8 features such as streams and lambdas is a plus

- Knowledge of REST concepts and design is a plus

- Knowledge of ES6 features/syntax is a plus

- Knowledge of functional programming concepts is a plus

- Knowledge of build/deploy tools such as Ant, Maven, Gradle, Ansible, Chef, Puppet etc. is a plus

- Knowledge of one or more scripting languages such as Awk, Bash, Perl, Python, Rubyetc. is a plus

- Ability to use modern IDEs such as VSCode, IntelliJ IDEA, Eclipse etc. is a plus

- Knowledge of container technologies such as Docker, Kubernetes, etc. is a plus

Bonus Points :

- For product experience. We're a product company. Talk to us if you have worked on software products

- For startup experience. Have you worked in a any startups? We're always looking for people who have startup experience

- If you've developed and deployed any software for your own, or others- use

- If you've contributed to open source projects

- If you've spoken at developer conferences, published articles in tech websites, published podcasts

- If you communicate well. Do you blog? Can you explain ideas clearly and succinctly? Can you answer questions in short, clear sentences?

- If you have technical certifications such as AWS, Docker, Redhat etc.

- If you're self taught. Have you learned other programming languages, technologies etc. on your own? Share the details of the courses you took online, for instance.

- For deep knowledge in one or more areas. We like people who dig down, understand concepts in detail

- If your code/work is out there in public. We'd love to see what you've developed and deployed to the external world