Frontend Developer

About OneInbox

At Vibtree Inc., we’ve built OneInbox.ai, a Voice AI platform designed for seamless adoption by businesses. It features human-like Voice AI agents that eliminate wait times and handle customer interactions faster and more accurately than human agents.

OneInbox is a SaaS solution leveraging GenAI to automate personalized sales, follow-up calls, and customer support across various accents, offering latency-free, humanized communication.

Our mission is to streamline communication workflows while maintaining high levels of security, scalability, and efficiency.

The Opportunity

We are looking for a React Developer who will drive the frontend architecture and development of our scalable, enterprise-grade SaaS platform.

You will:

• Work on complex UIs
• Optimize performance for real-time analytics
• Contribute to our component-based design system

This role is ideal for someone who enjoys building high-performance web applications that can handle millions of conversations, large-scale data visualization, and seamless user interactions.

Your Responsibilities

Frontend Development & Optimization

• Develop highly responsive, modular, and reusable React components for the OneInbox platform
• Optimize UI performance, accessibility, and usability across multiple devices and screen sizes
• Implement efficient state management using Redux, React Query, or similar libraries
• Work on real-time data visualization and ensure seamless frontend-backend communication

Component Library & Design System

• Build and maintain a scalable UI component library for consistent user experiences
• Collaborate with UX/UI designers to implement pixel-perfect designs
• Ensure all frontend code follows OneInbox’s design system and best practices

Security & Compliance

• Implement secure authentication and data handling patterns (OAuth, JWT, Role-Based Access Control)
• Follow secure coding practices to prevent vulnerabilities (e.g., CSRF, XSS, SQL Injection)
• Ensure compliance with GDPR and enterprise security standards in frontend development

Collaboration & Code Quality

• Work closely with backend engineers, AI researchers, and product teams to build seamless user experiences
• Perform code reviews, write unit and integration tests, and ensure high code quality
• Contribute to technical documentation and best practices for frontend development

Performance & Scalability

• Improve frontend rendering performance for data-heavy applications
• Work on lazy loading, caching strategies, and Service/Web Workers for better efficiency
• Optimize API calls and data fetching strategies for high-traffic applications

What You Bring

• 3+ years of experience in React.js, TypeScript, and modern JavaScript (ES6+)
• Deep expertise in React performance optimization for real-time applications
• Strong knowledge of Redux, React Query, Zustand, or equivalent state management tools
• Experience with component-driven UI design and modular development
• Proficiency in modern frontend build tools (Webpack, Babel, Vite, NPM/Yarn)
• Strong understanding of RESTful APIs, WebSockets, and GraphQL
• Experience with frontend security best practices (e.g., CSP, JWT, OAuth)
• Familiarity with testing frameworks like Jest, React Testing Library, and Cypress
• Knowledge of SSR, SSG, and Next.js is a plus
• Experience with enterprise SaaS platforms, especially B2B or AI-driven products

Nice-to-Haves

• Experience with WebRTC, AI-powered UI, Browser Notifications, or chatbot interfaces
• Knowledge of real-time analytics dashboards (D3.js, Recharts, Highcharts)
• Background in FinTech, AI SaaS, or enterprise security solutions
• Contributions to open-source projects, tech blogs, or developer communities

Why Join OneInbox?

• Be part of a rapidly growing AI-powered SaaS startup
• Work on cutting-edge Voice AI technology in a scalable, high-performance environment
• Contribute to building enterprise-grade applications used by businesses worldwide
• Opportunity to lead the frontend roadmap and define best practices for React development
• Competitive salary, flexible work culture, and a collaborative startup environment

We look forward to building the future of Voice AI-powered SaaS with you! 🚀

About the Role

At Ceryneian, we’re building a next-generation, research-driven algorithmic trading platform aimed at democratizing access to hedge fund-grade financial analytics. Headquartered in California, Ceryneian is a fintech innovation company dedicated to empowering traders with sophisticated yet accessible tools for quantitative research, strategy development, and execution.

Our flagship platform is currently under development. As our Frontend / Full Stack Engineer, you’ll lead the creation of a stunning, intuitive user experience—spanning our landing page, drag-and-drop strategy builder, trading dashboards, and internal tools. You’ll collaborate closely with design, backend, and DevOps teams to build high-performance, secure, and scalable customer-facing applications. This role is central to delivering the reliability, flexibility, and performance our users will rely on in fast-moving financial markets.

We are a remote-first team and are open to hiring exceptional candidates globally.

Core Tasks

·      Design, build, and deploy customer-facing interfaces, including the strategy builder, dashboards, and marketplace.

·      Implement reusable UI components based on Figma designs; integrate charting tools like TradingView or Highcharts.

·      Own the frontend development pipeline, including prototyping, implementation, testing, and responsiveness.

·      Implement secure authentication and user management (OAuth2, JWT, multi-role access).

·      Build real-time web experiences using WebSockets, REST, and client-server integrations.

·      Collaborate with backend and DevOps teams to streamline data flow and deployment workflows.

Top Technical Competencies

·      Strong foundation in HTML/CSS, JavaScript/TypeScript.

·      Proficiency in modern frontend frameworks such as React (Next.js), Svelte, Angular, Vue, or Phoenix.

·      Experience with OAuth2 and secure authentication workflows.

·      Familiarity with server-side rendering (SSR) and modern state management (Zustand, Redux, MobX).

·      Integration experience with charting libraries such as TradingView, Recharts, or Highcharts.

·      Deployment experience using platforms like Vercel, Heroku, GCP, or AWS.

·      Working knowledge of WebSockets, REST APIs, and data streaming models.

·      0–3 years of frontend development experience.

Bonus Competencies

·      Familiarity with Supabase, PostgreSQL, Firebase, or MongoDB.

·      Understanding of microfrontend architectures or API Gateway patterns.

·      Experience with WebAssembly and real-time trading interfaces.

·      Exposure to fintech platforms or trading systems.

·      Background from Tier-I or Tier-II institutions with strong computer science fundamentals, a passion for scalable system design, and a drive to build cutting-edge fintech infrastructure.

Ideal Candidate

You’re a design-minded full stack engineer who builds fast, clean, and modular frontend systems. You thrive on making complex interfaces intuitive—turning strategy logic into drag-and-drop workflows—and can ship high-performance components that integrate seamlessly with real-time APIs. You value design systems, scalable frontends, and cross-functional collaboration.

What We Offer

·      Opportunity to shape the product interface of a next-gen fintech startup.

·      A collaborative, technically driven culture.

·      Competitive compensation with performance-based bonuses.

·      Flexible working hours and a remote-friendly environment.

·      Exposure to financial modeling, trading infrastructure, and real-time systems.

·      Collaboration with a world-class team from Pomona, UCLA, Harvey Mudd, and Claremont McKenna.

Required Skills 

1) Good experience in Angular Latest Versions 

2) Hand on Node.JS./Express JS 

3) Database : MYSQL/MongoDB 

4) Experience in Java Script, Typescript. 

5)Good experience in HTML5, CSS3, JavaScript, Jquery 

6) Experience working in an Agile environment. 

7) Good communication skills.

• Designing and developing interactively Adapting / Responsive web applications using best practices on ReactJs and the latest front-end technologies.

• Writing tested, idiomatic, and documented JavaScript, HTML and CSS, LESS / SASS.

• Cooperating with the back-end developer in the process of building the RESTful APIs.

• Participate in complex technical and design decisions for ReactJs projects.

• Ensuring high performance of applications (on mobile and desktop) and providing support.

• Work closely with design teams, development teams and testing teams.

• Coordinate team deliverables assuring Quality and Completeness.

• Unit Testing.

Technical Skills:

• Highly Skilled with proven experience in React 16+ and its State Management tools like Redux, styling framework like Material UI.

• Proficient in CSS, LESS / SASS, Semantic HTML, and writing cross-browser compatible code.

• Extensive experience using JavaScript/ Typescript, HTML5, CSS/CSS3, LESS/SASS, Bootstrap, AJAX, JSON, Gulp, Grunt etc.

• Good Knowledge in Rest APIs/ GraphQL.

• Experience in tools such as GIT / SourceTree / Bit Bucket, JIRA, Confluence, etc.

• Should have understanding of the agile methodology

• User should have basic knowledge on tools like Figma / Adobe XD and photoshop etc.

Nice to have:

• Nice to have knowledge in Angular, NextJs.

• Nice to have knowledge in Progressive Web Application (PWA), Service Worker and Web Worker, etc.

• Best practices for Website Accessibility (WCAG)

Personal Traits:

• Strong Verbal and Written communication skills, such as meeting facilitation, presentation and documentation

• Work day-to-day with development team, QA testing team, providing expert support to each as needed and appropriate.

• Lead and Coordination experience with critical thinker and good problem-solver.

Education Qualification

• UG: B. Tech / B.E. – Computers OR PG: MCA / M. Tech

Job Title: Mid-Level Frontend Developer (React/TypeScript)

Job Description: We are looking for a Mid-Level Front End Developer with 2-3 years of experience in React and TypeScript to join our team. The ideal candidate should have a strong understanding of React and TypeScript, and be able to write high-quality, maintainable code. They should also be familiar with module CSS, have experience working with component libraries and state management frameworks, and have a passion for creating beautiful and intuitive user interfaces.

Responsibilities:

●      Develop high-quality, scalable, and maintainable code using React and TypeScript

●      Collaborate with cross-functional teams to design and implement new features

●      Participate in code reviews and contribute to code quality improvement initiatives

●      Use our in-house component library and Storybook to develop reusable components

●      Work with Recoil.js for state management and Context API for in-house libraries

●      Write clean, efficient, and well-documented code that follows best practices

●      Ensure code quality and maintainability through automated testing, linting, and code analysis

●      Stay up-to-date with the latest trends and technologies in front-end development

Requirements:

●      2-3 years of experience in developing front-end applications using React and TypeScript

●      Strong understanding of HTML, CSS, and JavaScript

●      Familiarity with module CSS and component libraries

●      Experience with state management frameworks like Recoil.js and Context API

●      Strong understanding of code quality and best practices

●      Excellent problem-solving and analytical skills

●      Good communication and teamwork skills

●      Bachelor’s degree in Computer Science or a related field is preferred

1. Work closely with our customers to understand their needs and build high-quality user interfaces.
2. Build, test and ship dashboards using frameworks like React, ES6, and Webpack.
3. Work with engineers and senior leadership to turn our vision into a tangible roadmap every quarter.
4. Add positive energy in every meeting or interaction with your coworkers.

Minimum Qualifications

1. B.E/B.Tech/M.Tech in CS/CE/IT
2. Must-have requirements for candidates include proficiency in the following areas/aspects:
3. Git version control system
4. Ability to collaborate and communicate complex technical concepts.
5. Experience working with charting libraries (i.e. ChartJS, Chartist, Grafana).
6. Experience with ReactJS 
7. Experience building highly scalable, high performance, responsive web applications
8. Experience in fundamental front end web technologies including but not limited to HTML, CSS, JavaScript - Minimum work experience 2 years

Languages/Frameworks

Javascript, React, HTML/CSS

Preferred Qualifications

1. Experience building, adopting and maintaining RESTful APIs.
2. A passion for all things UI and Front End
3. Ability to work in a fast-paced and agile development environment
4. Strong customer focus and obsession with quality
5. Experience working with UI for data-heavy products.