Senior Phonegap Hybrid 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.

Responsibilities:

• Review, Evaluate, and Validate technical requirements.
• Work and lead other team members to translate the requirements into final deliverables.
• Understand Storyboards and Visual mock-ups.
• Understand and utilize the latest tools, technologies, and trends in Web development.
• Ensure the deliverables meet Primathon standards, and guidelines.
• Developing your frontend capability in complex problems and expanding your horizon of technologies.
• Responsible for designing, coding and modifying web pages that are focused on content within the standards, guidelines and requirements of clients.
• Work with clients, and other team members as appropriate.
• Understand and utilise the tools and technologies being used.
• Work with CTO to keep on track with the project plan.
• Come up with efficient, modular and scalable solutions for business and technical problems.

Requirements:

• Experience with Frontend technologies (React.js ).
• Proficient understanding of web markups, including HTML, CSS-3
• Proficient with modern JavaScript (ES6+: classes, modules, arrow function, destructuring etc).

• 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.

• eact.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.

React JS & AWS

• Proficient working knowledge of React JS,Redux, ES6, Node JS, VSCode, ES Lint, HTML5, CSS3, Javascript, jQuery, Bootstrap 4
• Ability to learn and adapt on customer expectations
• Passion for user experience and user - centric development
• Strong communication skills that include leading design - related conversations, ability to build and nurture good relationships and foster an environment for collaboration
• Self - starter and passionate learner
• Creative problem - solver with a strong eye for detail
• Experience with version and source control, preferably Git Lab
• Should have knowledge on micro services.
• Overall experience between 4 yrs to 8 yrs.

Our rapidly growing product engineering team is looking for a super-ambitious, product-minded Senior Frontend Engineer (ReactJs) to join our team.

Responsibilities

• Significant experience building frontend applications using React.
• Strong knowledge of React fundamentals such as the virtual DOM, component lifecycle, component state, etc.
• Strong knowledge of JavaScript and functional programming paradigms. For example, writing functional code opposed to imperative code.
• Experience with a state management library like Redux, MobX or others
• Writing clean, reliable and maintainable code
• Knowledge of type checking and unit testing like jest, typescript, prop types, flow, etc.
• Experience with debugging web applications
• Continuously discover, evaluate, and implement new technologies to maximize development efficiency.
• CSS, rapidly building responsive websites from UX designs/mockups by collaborating closely with the Business and Design teams.
• US Working Hours (Supporting USA Based HealthTech Company)
• Familiarity with principles of good user experience.
• Optimize applications for maximum speed and scalability
• Ensure the technical feasibility of UI/UX design
• Experience Working on Agile Teams and using Application Lifecycle Management tools like JIRA
• Everything else is a lovely bonus that we're excited to hear about!

Technology required:

• React js
• Java script
• Git
• Agile methodologies
• Redux
• React Hooks
• Typescript
• Chakra UI

🎯 The Opportunity

• Work directly with US-based recently funded HealthTech Company
• Work within a dynamic team, that challenge the status quo and champions agile working and continuous improvement
• Passionate colleagues with a very friendly environment
• Fast career development opportunities as we are a small team poised for exponential growth.

🚀 Why Join Nexuses (Benefits)?

• Work from anywhere We are a 100% distributed team.
• Premium insurance, private health insurance ( 5 Lac)
• Fully remote position with bright, motivated, and friendly colleagues
• Flexible Working Hours & Vacation Policy
• Competitive salary +Yearly Performance Bonus
• Ample opportunity to grow in a fast-paced environment
• 2 annual company retreats to awesome places

About Nexuses :

We're a powerhouse of growth and technology, partnering with companies that want to be the best at what they do. We offer a full suite of digital and technology services, harnessing best-in-class products and technology to help our customers dominate their market.

If you're hesitant to apply for this position because you feel that you don't meet this list of qualifications fully, don't worry! We want to hear from you.

Come Work With Us! 🙂