React.js Developer

About One Impression

One Impression is one of the world’s largest influencer marketing platforms, working with 300+ global brands like Unilever, Nestle, and Amazon to connect with a diverse creator network. Our platform empowers brands and creators to collaborate seamlessly and scale their reach. To capture a significant share of global media ad spend, One Impression is quickly becoming the industry’s go-to influencer marketing platform.

About the Role

We are looking for a Frontend Engineer (SDE II) who is experienced in both React.js for Web and React Native for Mobile Apps. You will be responsible for architecting, implementing, and optimizing web and mobile applications while collaborating closely with Product, Design, and Backend teams.

This role is perfect for someone who enjoys working across platforms, building scalable systems, and enhancing the developer experience.

Key Responsibilities

• Architect and develop frontend solutions for both Web (React.js) and Mobile Apps (React Native).
• Build and optimize config-driven systems, reusable components, and common libraries.
• Work closely with Product Managers, Designers, and Backend Engineers to create seamless user experiences across platforms.
• Own and drive React Native-based mobile applications, ensuring modular, scalable, and performant code.
• Optimize web and mobile performance for speed, responsiveness, and efficiency.
• Set up and manage CI/CD pipelines for both web (Docker, Vercel) and mobile apps (Fastlane, App Store/Play Store).
• Implement and maintain state management using Redux, Redux Saga, Recoil, or MobX.
• Work with mobile-specific integrations, such as Firebase Push Notifications, Deep Linking, and Native Modules.
• Ensure cross-platform consistency by handling browser compatibility (web) and device compatibility (mobile).
• Write clean, maintainable, and reusable code, following best practices and design patterns.
• Debug and fix issues rapidly, ensuring a seamless Web & Mobile experience.
• Stay up-to-date with the latest trends and contribute to open-source projects, tech talks, and internal knowledge sharing.

Requirements

• 3-5 years of experience in frontend development, working with both React.js (Web) and React Native (Mobile).
• Strong expertise in JavaScript (ES6+), React.js, and React Native.
• Experience with bundlers like Webpack, Rollup, and Metro for React Native.
• Deep understanding of mobile CI/CD (Fastlane, App Store, Play Store) and web CI/CD (Docker, Vercel, Jenkins, GitHub Actions).
• Strong grasp of Web & Mobile performance optimization techniques.
• Experience with Redux, Redux Saga, MobX, or Recoil for state management.
• Good understanding of mobile UI/UX principles, animations (Reanimated, Gesture Handler), and responsive design.
• Basic familiarity with native iOS/Android development (Swift/Kotlin is a plus).
• Experience with Unit Testing (Jest, React Native Testing Library, Detox, Cypress, Appium, or Espresso).
• Strong debugging skills using Chrome DevTools (Web) and Flipper, Xcode, Android Studio (Mobile).
• Ability to work independently, take ownership of projects, and mentor junior engineers.
• Open to feedback and collaborative in working towards the best user experience.

Why Join One Impression?

- Be a part of one of the largest influencer marketing platforms globally, working with top brands and influencers.

- Opportunity to lead and shape a fast-growing marketplace product.

- Competitive salary and benefits package.

- A collaborative and innovative work culture in a rapidly scaling company.

What We’re Looking for in You:

1. Qualifications: Bachelor’s Degree in Computer Science, Information Technology, or a related field

2. Certifications: NA

3. The Experience That Sets You Apart:

● Lead the development of responsive, pixel-perfect web interfaces using HTML, CSS, and JavaScript.

● Set and maintain frontend coding standards, structure, and best practices

● Collaborate with designers to bring UI/UX concepts to life with clean, maintainable code. ● Optimize web pages for performance, SEO, and cross-browser/device compatibility.

● Guide and mentor junior developers through code reviews and technical support.

● Own project timelines, quality assurance, and delivery for all frontend initiatives

4. Your Subject Matter Expertise:

● Team leadership — 2+ years leading 10+ member teams

● Strong communicator — aligns tech and non-tech teams

● Detail-driven — ensures UI and code precision

● Collaborative — fosters teamwork and mentorship

● Organized — manages time and parallel tasks efficiently

● Service-based mindset — experience in ~200-employee setups

● Composed under pressure — delivers in fast-paced environments

● Solution-focused — navigates challenges with clarity

About Optiblack LLC

Optiblack LLC is a company that specializes in providing tech and analytics services. We offer a range of solutions to help businesses meet their goals, including:

• Data Analytics: we can help you extract insights from your data to make informed decisions.
• Web Development: we can design and build custom websites for your business.
• Mobile App Development: we can create mobile apps for both iOS and Android platforms.
• AI and Machine Learning: we can leverage these technologies to automate tasks and improve efficiency.

Optiblack LLC has a team of experienced professionals who can help you with your project. They have a track record of success in delivering high-quality solutions to our clients.

About the Role

We are looking for a passionate and talented intern developer to join our growing team at Optiblack LLC. This is a fantastic opportunity to gain hands-on experience building and maintaining our React Native mobile application. You will work alongside experienced developers and contribute to a product used by millions of users.

Responsibilities:

• Develop new features and functionalities for our React Native mobile application.
• Collaborate with designers and backend developers to ensure a seamless user experience.
• Write clean, maintainable, and well-documented code.
• Fix bugs and identify areas for improvement in the existing codebase.
• Stay up-to-date with the latest trends and technologies in React Native development.
• Participate in code reviews and provide constructive feedback.

Qualifications:

• Strong understanding of React Native development concepts.
• Experience with JavaScript (ES6+) and related frameworks.
• Familiarity with React development principles is a plus.
• Experience with Git version control system.
• Excellent problem-solving and debugging skills.
• Ability to work independently and as part of a team.
• Strong communication and interpersonal skills.
• A passion for learning and staying updated with the latest technologies.

Bonus Points:

• Experience with building cross-platform mobile applications.
• Experience with UI/UX design principles.
• Experience with unit testing frameworks like Jest or Mocha.
• Experience working on Social Media Apps or having an interest in working on them.

** Internship Duration:** 3 Months

Location: Remote

To Apply:

Please submit your resume and a cover letter explaining your interest in the position and why you think you would be a good fit for our team

Who are we?

With millions of transactions each month, Animall is one of the world’s fastest growing agritech companies. We continue to re-imagine and re-engineer the dairy ecosystem in India, and each team member will have significant ownership of the key components that go into this mission!

Till now, Animall has primarily focused on building a peer-to-peer cattle trading platform and the journey of Animall has been very encouraging and promising - we have reached more than 5 million dairy farmers within a short span of 1.5 years. More than 300,000 cattle have been sold through Animall which amounts to 4000 Crore Rs of GTV and is now at a monthly run rate of 320 Crore Rs GTV.

Our dairy farmers have rated us 4.6 out of 5 and 60% of our dairy farmers refer Animall to at least one friend on a monthly basis.

How will you succeed?

• Passion for building high-impact, well-performing user experiences
• Independent, proactive, and able to deliver production-ready code with minimal guidance
• Great communication and collaboration skills working cross-functionally with other engineers, product managers, and designers
• Mentor and train other team members on design techniques, and coding standards.
• Live and grow the Animall https://www.notion.so/Our-Culture-2ec96ec0e96b427b9187cc94cdd61b28">Culture

Who are we looking for?

• Proficient in HTML5, CSS3, and JavaScript with at-least 6 years of hands on experience.
• Familiarity with MVC & MVVM design patterns.
• Experience with modern https://reactjs.org/">React development using https://reactjs.org/docs/hooks-intro.html">Hooks & https://reactjs.org/docs/context.html">Context.
• Familiarity with Typescript and/or ES6 is a must.
• Familiarity with RESTful APIs

What we offer

• A fast paced environment to learn and grow. You’ll get opportunities to represent the company in events like Devoxx, Google Developer Days India etc.
• Very high autonomy; freedom to take risks, to experiment and to fail.You’ll collaborate with product managers and designers, data scientists and algorithm experts, even dairy farmers, to build exciting new features
• An opportunity to work on something that really matters. Check out the reviews for our app.
• Very high transparency.
• We pay top of market with excellent benefits
• Personal CFO Services with IndMoney.
• Employee assistance program- Counselling and consultation services for work and home- life topic
• Group medical insurance family floater for Employee, spouse and kids
   
   
   

• Create well-designed, tested code using best practices for website development, including mobile and responsive site design
• Integrate data from various back-end services and databases
• Create and maintain software documentation
• Stay plugged into emerging technologies/industry trends and apply them into operations and activities
• Cooperate with web designers to match visual design intent

Overview
We are looking for a Senior JavaScript developer who is well versed with React and TypeScript.
2-5 years experience mandatory! We look for individuals with a deep knowledge of JavaScript, CSS, and HTML, who are not only comfortable in writing custom JavaScript but also know when to apply off-the-shelf solutions to a problem. Individuals who do well on this team are self-motivated engineers with a passion for user experience & innovation.
We currently work with TypeScript, React, GraphQL, and Node.js, however the ability to adapt with changing technology is an important quality that we are looking for.

Responsibilities
Developing new user-facing features using TypeScript/React.js
Building reusable components and front-end libraries for future use
Translating designs and wireframes into high quality code
Optimising components for maximum performance across a vast array of web-capable devices and browsers
API integrations

Skills
Thorough understanding of Typescript & React.js and its core principles
Experience with popular React.js workflows (such as Redux)
Familiarity with newer specifications of EcmaScript
Experience with data structure libraries (e.g., Immutable.js)
Knowledge of isomorphic React is a plus
Familiarity with GraphQL/RESTful APIs
Knowledge of modern authorization mechanisms, such as JSON Web Token
Experience with common front-end development tools such as Babel, Webpack, NPM, Yarn etc.
WebRTC knowledge is a plus.