
Greetings from Deltacubes Technology!!
SkilL Set:
React js
Experience:
6+years
Thanks
Bavithra

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Job Title : Lead Web Developer / Frontend Engineer
Experience Required : 10+ Years
Location : Bangalore (Hybrid – 3 Days Work From Office)
Work Timings : 11:00 AM to 8:00 PM IST
Notice Period : Immediate or Up to 30 Days (Preferred)
Work Mode : Hybrid
Interview Mode : Face-to-Face mandatory (for Round 2)
Role Overview :
We are hiring a Lead Frontend Engineer with 10+ Years of experience to drive the development of scalable, modern, and high-performance web applications.
This is a hands-on technical leadership role focused on React.js, micro-frontends, and Backend for Frontend (BFF) architecture, requiring both coding expertise and team leadership skills.
Mandatory Skills :
React.js, JavaScript/TypeScript, HTML, CSS, micro-frontend architecture, Backend for Frontend (BFF), Webpack, Jenkins (CI/CD), GCP, RDBMS/SQL, Git, and team leadership.
Core Responsibilities :
- Design and develop cloud-based web applications using React.js, HTML, CSS.
- Collaborate with UX/UI designers and backend engineers to implement seamless user experiences.
- Lead and mentor a team of frontend developers.
- Write clean, well-documented, scalable code using modern JavaScript/TypeScript practices.
- Implement CI/CD pipelines using Jenkins, deploy applications to CDNs.
- Integrate with GCP services, optimize front-end performance.
- Stay updated with modern frontend technologies and design patterns.
- Use Git for version control and collaborative workflows.
- Implement JavaScript libraries for web analytics and performance monitoring.
Key Requirements :
- 10+ Years of experience as a frontend/web developer.
- Strong proficiency in React.js, JavaScript/TypeScript, HTML, CSS.
- Experience with micro-frontend architecture and Backend for Frontend (BFF) patterns.
- Proficiency in frontend design frameworks and libraries (jQuery, Node.js).
- Strong understanding of build tools like Webpack, CI/CD using Jenkins.
- Experience with GCP and deploying to CDNs.
- Solid experience in RDBMS, SQL.
- Familiarity with Git and agile development practices.
- Excellent debugging, problem-solving, and communication skills.
- Bachelor’s/Master’s in Computer Science or a related field.
Nice to Have :
- Experience with Node.js.
- Previous experience working with web analytics frameworks.
- Exposure to JavaScript observability tools.
Interview Process :
1. Round 1 : Online Technical Interview (via Geektrust – 1 Hour)
2. Round 2 : Face-to-Face Interview with the Indian team in Bangalore (3 Hours – Mandatory)
3. Round 3 : Online Interview with CEO (30 Minutes)
Important Notes :
- Face-to-face interview in Bangalore is mandatory for Round 2.
- Preference given to candidates currently in Bangalore or willing to travel for interviews.
- Remote applicants who cannot attend the in-person round will not be considered.

· 7+ years of professional experience in front-end development.
· 7+ 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).

Key Responsibilities:
² Develop and maintain responsive web applications using React.
² Collaborate with UX/UI designers to translate wireframes and mockups into functional code.
² Optimize applications for maximum speed and scalability.
² Write clean, maintainable, and efficient code following best practices.
² Participate in code reviews and contribute to team knowledge sharing.
² Troubleshoot and debug applications to enhance performance.
² Stay up-to-date with the latest industry trends and technologies to ensure our tech stack remains cutting-edge.
Qualifications:
² Current SDE 3 designation or equivalent experience in a senior development role.
² 5+ years of experience in software development, with a strong focus on frontend technologies, particularly React.
² Proficiency in JavaScript (ES6+), HTML, and CSS, with a deep understanding of modern web development practices.
² Experience with state management libraries (e.g., Redux, MobX) and routing solutions.
² Strong knowledge of RESTful APIs and experience with modern build tools (Webpack, Babel).
² Experience with testing frameworks (e.g., Jest, React Testing Library) and test-driven development (TDD).
² Excellent problem-solving skills and the ability to work collaboratively in a fast-paced environment.



What does the core role include?
- Designing and developing high-volume, low-latency applications for mission-critical systems and delivering high-availability and performance
- Designing stateless components in React Native
- Contributing in all phases of the development lifecycle
- Working with the developers to create and maintain a robust framework to support the apps
- Working with the developers to build the interface with a focus on usability features
What else can you expect in the role?
- Prepare and produce releases of software components
- Optimizing performance for the apps
- Problem-solving skills, analytical mind, and positive attitude
- Ability to think from end users perspective and focused on improving the overall product experience.
- Deliver across the entire app life cycle concept, design, build, deploy, test, release to app stores and support
What can fetch you brownie points?
- Hands on experience with React Native is required
- Hands-on experience in React Native APIs, ReactJS, Javascript, ECMAScript (OOJS) and JSX.
- Strong understanding of JavaScript ecosystem
- Hands on experience on Android in creating Hybrid / Native applications
- Demonstrable UI/UX experience on a large-scale app.
- Thorough understanding of React Native development tools like IDEs (Nuclide, Atom, Sublime Text, or Visual
- Good knowledge of JS frameworks like ReactJS is a plus.
Desired Skills and Experience
Hybrid Apps,React Native, Native iOS and Android Architecture understanding

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

• Graduate in Computer Science or any other engineering degree
• Very strong in Javascript & other framework like Angular.
• Knowledge of HTML/CSS
• Candidate need to work as a contributor in an agile team.
• Work with complete ownership & contribute on design & development of new features.
• Contribute on bug fixing & writing auto tests.
• Good verbal & written communication skills.

Requirements and Qualifications
- Bachelor’s or master degree in engineering
- 4+ years of work experience.
- Proficient understanding of HTML, CSS, and Javascript
- Proficient understanding of ReactJs or similar library
- Good understanding of responsive web development
- Good understanding of SEO and analytics
- Ability to break the business problem into smaller features
- Ability to access the technical feasibility of UI/UX designs
- Build reusable code and libraries for future use
- Optimize application for maximum speed and scalability
- Proficient understanding of cross-browser compatibility


- Experience working with HTML5, CSS3 in user interface design.
- Understanding of web technologies including one or more of the following:, Javascript (React, Angular, Node, D3, etc.)
- Expert knowledge on CSS preprocessors like Sass and LESS
- Experience on RESTful API.
- Strong typography, layout and visual design skills.
- Good exposure to databases, SQL queries
- Good analysis skills in order to troubleshoot and resolve the problems.
- Creative to suggest ways to simplify the UI workflows





