React.js Developer

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.

Job Title: React Lead Developer

Location: Airoli, Mumbai

Work Mode: Work from Office (WFO) – Full-time

About the Role:

We are seeking a highly skilled and experienced React Lead Developer to join our growing team in Airoli, Mumbai. The ideal candidate will lead front-end development efforts, mentor developers, collaborate closely with cross-functional teams, and play a key role in delivering scalable, high-performance web applications.

Key Responsibilities:

• Lead the design and development of responsive web applications using React.js
• Collaborate with UX/UI designers, product managers, and backend teams to deliver high-quality products
• Write clean, maintainable, and well-documented code
• Optimize applications for performance and scalability
• Conduct code reviews and ensure coding best practices are followed
• Mentor and guide junior developers in the team
• Participate in architectural discussions and contribute to tech strategy
• Keep up with emerging trends and technologies in frontend development

Required Skills & Experience:

• 6+ years of experience in frontend development, with at least 3 years in React.js
• Strong proficiency in JavaScript (ES6+), HTML5, CSS3, Redux, and REST APIs
• Experience with React Hooks, Context API, and component-based architecture
• Familiarity with Webpack, Babel, and modern build tools
• Experience with version control tools like Git
• Exposure to Agile methodologies and CI/CD pipelines
• Strong problem-solving and debugging skills
• Excellent communication and leadership qualities

Nice to Have:

• Experience with TypeScript, Next.js, or React Native
• Exposure to cloud platforms (AWS/Azure)
• Familiarity with testing frameworks (Jest, Cypress, etc.)

Education:

Bachelor’s or Master’s degree in Computer Science, Engineering, or a related field

This person MUST have:

• BE Computer Science, MCA or equivalent
• Extreme CSS skills
• Experience with ReactJS or NextJS is a MUST
• Strong communication skills
• A strong passion for writing simple, clean and efficient code.
• Sound knowledge of clean code, no unused code, optimized code and more.
• Always starting with a document and then implementing in a systematic and organized manner
• Past experience as a frontend developer building modern JavaScript-based web applications
• Excellent verbal and written communication, teamwork, decision making and

influencing skills.

Experience:

• Min 5 years experience
• Not more than 15 year experience.
• Startup experience is a must. 

Location

• Remotely, anywhere in India

Timings:

• 40 hours a week but with 4 hours a day overlapping with client timezone.  Typically clients are in California PST Timezone.

Position:

• Full time/Direct
• We have great benefits such as PF, medical insurance, 12 annual company holidays, 12 PTO leaves per year, annual increments, Diwali bonus, spot bonuses and other incentives etc.
• We dont believe in locking in people with large notice periods.  You will stay here because you love the company.  We have only a 15 days notice period.

GeoSpoc is looking for passionate Senior Frontend Engineers to join the software engineering team and help build elegant, intuitive interfaces to analyse geospatial data.

• A passionate developer with solid understanding of software basics.
• Always willing to learn and explore upcoming technologies.
• Pro-active, reliable and result oriented.
• Someone who can continuously perform in a fast-paced environment.

• Extensive experience building and maintaining responsive web interfaces using modern JavaScript, HTML & CSS tools and client-side frameworks like React or Vue
• JavaScript -
• Extensive knowledge of JavaScript. ES6, polyfills, etc.
• Writing good code with proper use of Linters.
• Good to have -TypeScript and/or JSDoc
• Minimum 1 years of experience in state management libs such as Vuex or Redux.
• Proficient in agile software development practices: version control, Kanban, ticketing, peer-reviews
• Test driven development, continuous integration and continuous deployment.
• Experience with docker and container orchestration
• Good understanding of micro-services architecture
• Experience building solutions for the cloud; using AWS, Azure, GCP etc.
• Has had hands-on experiences in developing performance driven Progressive Web Apps

• js / React - 1.5 to 3 years
• State Management - 1 to 3 years
• Vanilla JS - 3 to 5 years
• Karma / Jest - 1 to 3 years
• Map libs - 1.5 to 3 years
• Docker - 1.5 to 3 years
• HTML5 / CSS3 - 2 to 5 years

Job Title : Software Engineer

Gogo has an exciting opportunity for a Software Engineer role who enjoys crafting great user experience and will help us design and develop our next generation airline services platform. You will be part of the team that is building a globally deployed platform for our customers using some best-in-class software technologies.

Job Summary:

The ideal candidate for this role will build and design the front-end user experience for the customer airline services platform. You will be a crucial working member of multi-disciplinary, highly skilled technical teams that design, develop, test, debug and document software, by providing high quality technical solutions and services that deliver business value and drive continuous improvement across the organisation.

Key responsibilities :

• Translate business requirements into technical details relevant to web application.
• Contribute in the design and implementation of UI changes across our product base. 
• Develop detailed technical analysis and design specifications based on functional requirements. 
• Develop modern web applications (progressive and responsive) in coordination with UI Team
• Collaborate closely with UX, Design, UI and web development teams to solve problems. 
• Develop complete front-end stack of projects using HTML/CSS/SASS, React and JavaScript.
• Integrate front-end UI with backend services.
• Build responsive web pages with HTML5, CSS, JS/React for the customer facing corporate websites.
• Define UI frameworks and architecture for websites that follow industry best practices for development

Required Skills & Experience:

• Bachelor’s Degree in Engineering with 5-8 Years’ experience in front end development
• Hands on experience Core web fundamentals: HTML, JavaScript, and CSS preprocessors like Sass or LESS.
• Front-end (CSS) frameworks like Foundation or Bootstrap
• AJAX (Asynchronous JavaScript and XML)
• MUST have Hands-on experience in ReactJS and Redux delivered project on ReactJS and played key role.
• Great understanding of Web technologies like XML, XHTML
• Client Server-side scripting languages such as web services development using RESTful implementations.
• Familiarity with the Flux Design Pattern or one of the libraries
• Unit Testing with Mocha, Karma or Jest
• Hands on with BDD Experience
• Experience working with RESTFUL API (1-2 Years’ Experience)
• Good Written and Oral Communication Skills

Gogo is the inflight internet company. We bring flexibility and performance to airlines and passengers alike across every device, every flight, everywhere—all powered by our global inflight network. Gogo’s worldwide inflight Wi-Fi services have made internet and video entertainment a regular part of flying. We are a diverse group of technologists, marketers, strategists, and any other function you can think of- all working together in extraordinary harmony. And that’s just the beginning.

We connect the aviation industry and its travellers with innovative technology and applications, and we do it all in a high-energy environment that welcomes the next challenge. Be prepared for a dynamic ride with people who are passionate about what they’re building. 

We are an IIT Bombay incubated, healthcare start up developing a mobile based Ai technology to help reduce health risks for women during their pregnancy. Our Founders are Harvard and Columbia University alums with extensive experience in digital health in the US and India.

Mobile Development Engineer - React Native (Location: Mumbai)

Requirements:

2-4 years of experience on React Native. Good understanding of start up environment.

1.     Advanced knowledge of React Native.

2.     Excellent knowledge of React native libraries, Redux, HTML5, CSS3, JavaScript.

3.     Excellent knowledge on android and iOS UI design principles, patterns and best practices.

4.     Experience working with publishing on stores.

5.     Experience working with Rest APIs.

6.    Knowledge of integration and utilization of cloud services and payment systems.

7.    Should have played a key role in conceptualising to deployment of apps using React Native.

8    Project management, scheduling, allocation and delivery.

9.    Proven experience of agile development, sprint planning and backlog management.

10.   Keen focus on customer, excellent communication skills, with high level of responsiveness and responsibility.

Good to Have:

Full Stack experience.

Experience working on chat apps, community, and healthcare domain. 

Exposure or Interest in NLP, Machine Learning.