Senior Frontend 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.

React.js Developer Job Description

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.

React.js Developer Responsibilities:

• Meeting with the development team to discuss user interface ideas and applications.
• Reviewing application requirements and interface designs.
• Identifying web-based user interactions.
• Developing and implementing highly responsive user interface components using react concepts.
• Writing application interface codes using JavaScript following react.js workflows.
• Troubleshooting interface software and debugging application codes.
• Developing and implementing front-end architecture to support user interface concepts.
• Monitoring and improving front-end performance.
• Documenting application changes and developing updates.

React.js Developer Requirements:

• Bachelor’s degree in computer science, information technology, or a similar field.
• Previous experience working as a react.js developer.
• In-depth knowledge of JavaScript, CSS, HTML, and front-end languages.
• Knowledge of REACT tools including React.js, Webpack, Enzyme, Redux, and Flux.
• Experience with user interface design.
• Knowledge of performance testing frameworks including Mocha and Jest.
• Experience with browser-based debugging and performance testing software.
• Excellent troubleshooting skills.
• Good project management skills.

Responsibilities

As a Frontend Developer (Next.js) you will be responsible for -

•  Building the Complete UI/UX of our web application from scratch.
• Work closely with the Backend Engineer to integrate the algorithmic output from the backend REST APIs.
• Work closely with the product owners to create dynamic infographics with intuitive user controls.
• Work closely with our web Designer for bringing design to life.
• Participate in UAT, troubleshoot, bugs and application integration issues
• Create and maintain documentation related to the developed processes and applications

Qualification & Experience

• 2-3 years of demonstrable experience designing, building and working as a Next.js Developer for enterprise web application
• Ideally, this would include the following:
• Expert-level proficiency with Next.js and all its concepts
• Expert-level proficiency with JavaScript (ES6), HTML5 & CSS
• Expert-level proficiency with ReactJS and all its concepts like Hooks and Redux
• Familiarity with Python, Django, and Django Rest Framework
• Understanding of REST concepts and interacting with REST APIs
• Deep understanding of a few UI concepts:
• Cross-browser compatibility and implementing the responsive web design
• Familiarity with common JS visualization libraries built using D3, Chart.js, Highcharts, etc.
• Understanding of Next.js coding Standards
• Experience working with UX designers and bringing design to life
• In addition, the ideal candidate would have great problem-solving skills and familiarity with code versioning tools such as Github

• Identify bad code practices in JavaScript and write new analyzers to detect them.
• Improve the coverage of automatically fixable issues.
• Ensure fewer false-positives are reported by the analyzer.
• Work on the internal tools that support analysis runtimes.
• Contribute to open-source static analysis tools.

• Strong foundational knowledge in Computer Science.
• At least 3 years of professional software development experience in JavaScript.
• Understanding of the nuances of execution of the source code (AST, data flow graphs, etc).
• Familiarity with JavaScript practices followed in the industry.
• Native experience with Linux/Unix environment.
• A focus on delivering high-quality code through strong testing practices.

We are looking for a seasoned frontend developer to join our product team. This role requires you to be a tech-savvy contributor in translating the customer needs and user expectation into interactive web apps. You’ll be an exceptional problem solver and take responsible actions in ensuring the application is optimized both in technology and in delivering best user experience.

Responsibilities:

• Work closely with design, product management and development teams to create elegant, usable, responsive and interactive interfaces across multiple devices.
• Turning UI/UX designs into prototypes, creating awesome interactions from designs, writing reusable content modules and maintainability of the code.
• Implement UI development principles to ensure that the product client-side serves at scale.
• Review and optimize the app usage by monitoring key metrics and rectifying the issues proactively.
• An ability to perform well in a fast-paced environment and bring in optimal flow for rapidly changing design/ technology.

Requirements:

• 2 to 5 years of relevant work experience as a web developer, UI developer, JavaScript expert or frontend engineer
• Experience in Frontend Technologies 
  • Typescript - the right way. Ie, not using it exactly like Javascript, instead using it in the way it was intended to be used.
  • React
  • GraphQL (Relay Specification is a plus)
  • Apollo Client for React OR React-Relay
• Worked in large React Projects preferably in TypeScript, with proper usage of Typing.
  • Familar with React Contexts and Hooks
  • Should have a very good understanding, and practical knowledge in Advanced Guides in React (https://reactjs.org/docs/forwarding-refs.html" target="_blank">https://reactjs.org/docs/forwarding-refs.html) 
• Familiar with UI layouts, SASS, bootstrap and the CSS GRID system
• Experience with a GraphQL backend using either Apollo Client for React or React Relay is a plus
• Experience using any one React UI Framework: Ant UI, Elastic UI, Material Framework for React, Blueprint UI or Bootstrap for React

Requirements and Qualification

• 4-7 years of experience.

• Bachelor’s degree in engineering

• Assess the technical feasibility of UI/UX designs

• Develop new user-facing features

• Build reusable code and libraries for future use

• Optimize application for maximum speed and scalability

• Assure that all edge cases are handled

• Collaborate with other team members and stakeholder

• Good understanding of responsive web development

• Proficient understanding of cross-browser compatibility issues and ways to work around them

• Basic understanding of SEO

Job Description:

• We are looking for a seasoned front-end developer to join our product team. This role requires you to be a tech-savvy contributor in translating the customer needs and user expectation into interactive web apps. You’ll be an exceptional problem solver and take responsible actions in ensuring the application is optimized both in technology and in delivering the best user experience. You’ll be working on various projects in collaboration with different teams.

Responsibilities:

• Work closely with design, product management, and development teams to create elegant, usable, responsive and interactive interfaces across multiple devices.
• Turning UI/UX designs into prototypes, creating excellent interactions from designs, writing reusable content modules and maintainability of the code.
• Implement UI development principles to ensure that the product client-side serves at scale.
• Review and optimize the app usage by monitoring key metrics and rectifying the issues proactively.
• An ability to perform well in a fast-paced environment and bring in optimal flow for rapidly changing design/ technology.
• Responsible for the development of a complete set of architectural views for an enterprise in accordance with numerous open-source technologies, messaging/web service protocols (REST, JSONRPC, SOAP, etc.) and one of the more common architecture frameworks.
• Understanding and presenting the immediate/tactical and strategic benefits of adopting a consistent architectural approach within the context of the client’s business to help the stakeholders justify investments. 
• Assessing the requirements and presenting architectural recommendations that are in line with the strategic vision for the enterprise and wider best practice. 

Requirements:

• 5 to 7 years of relevant work experience as a UI developer, JavaScript expert or front-end engineer
• Sound knowledge in HTML and CSS
• Familiar with UI layouts, SASS, Bootstrap, and the CSS GRID system
• Proficient with JavaScript frameworks such as jQuery, Angular 2+ and Ionic framework
• Experience debugging using JavaScript-based tools like Chrome Developer Console
• Passionate to create good design and usability
• Knowledge of Pixi js (is plus)
• Strong business analysis skills and experience, including development of business vision and strategies, functional decomposition, requirements capture, process modeling. 
• Strong knowledge of design and architectural patterns. 
• Experience of software development methodologies and structured approaches to system development. 
• Write high quality source code to program complete applications within deadlines

Person Specification: 

• Should have strong communication and interpersonal skill
• Bright and enthusiastic, self starter
• Excellent analytical and problem-solving skills
• Outstanding presentation skills
• Implemented CI and Automated frameworks in Enterprise environment 
• Past experience in CI/CD/DevOps practices 
• Qualified in any technical skill assessment platform (Eg: Hacker Ranker, member, stars) in respective technical capabilities