React - Software Engineer

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.

We are looking for a great JavaScript developer who is proficient with React.js. Your primary focus will be on developing user interface components and implementing them following well-known React.js workflows (such as Flux or Redux).    

You will ensure that these components and the overall application are robust and easy to maintain. You will coordinate with the rest of the team working on different layers of the infrastructure. Therefore, a commitment to collaborative problem solving, sophisticated design, and quality product is important.    

Responsibilities :    

* Developing new user-facing features using React.js

* Building reusable components and front-end libraries for future use

* Translating designs and wireframes into high quality code

* Optimizing components for maximum performance across a vast array of web-capable devices and browsers    

Skills :    

* Strong proficiency in JavaScript, including DOM manipulation and the JavaScript object model

* Thorough understanding of React.js and its core principles with Type Script

* Experience with popular React.js workflows (such as Flux or Redux)

* Experience with data structure libraries (e.g., Immutable.js)

* Knowledge of isomorphic React is a plus

* Familiarity with RESTful APIs

* Knowledge of modern authorization mechanisms, such as JSON Web Token

* Familiarity with modern front-end build pipelines and tools

* Experience with common front-end development tools such as Babel, Webpack, NPM, etc.

* Ability to understand business requirements and translate them into technical requirements   

* A knack for benchmarking and optimization.  

About us:

HappyFox is a software-as-a-service (SaaS) support platform. We offer an enterprise-grade help desk ticketing system and intuitively designed live chat software.

We serve over 12,000 companies in 70+ countries. HappyFox is used by companies that span across education, media, e-commerce, retail, information technology, manufacturing, non-profit, government and many other verticals that have an internal or external support function.

To know more, Visit! - https://www.happyfox.com/

We’re looking for an experienced Frontend Engineer to join our growing engineering team to help build and maintain HappyFox’s product offerings.

What you can expect as a Frontend Engineer at HappyFox:

• You will implement product features by writing clean, robust, reusable code with tests.
• You’ll work alongside the Product, Design, and, Backend Engineering teams to iterate on new features within HappyFox products.
• You'll help improve the overall experience of our product by improving the quality of the front-end features.
• You’ll help identify areas of improvement in the codebase and initiate projects to make HappyFox better.
• You’ll contribute to and follow our workflow process, alongside the rest of the Engineering team.

You should apply if:

• You have at least 3 years of relevant professional experience in building web applications with javascript frameworks like Ember.js or React.js.
• You have a sound knowledge of HTML, CSS, and JavaScript.
• You have experience building single-page web apps and a good understanding of best practices in front-end development.
• You have experience in reviewing other team members' code and providing actionable comments.
• You have experience in following industry-standard coding practices.
• You have experience optimizing code and looking for ways to resolve performance issues.
• You are passionate about solving complex technical problems and troubleshooting issues.

Experience in years: 3+.  Less than 7.

Type: Individual contributor with good hands on proficiency.

Specifics:

• Writing HTML, CSS, and JavaScript. Being up on latest practices is a must, e.g., HTML5, CSS3, and ECMAScript 6 (minimum)
• Familiarity with a relevant and globally supported framework— both front-end and back-end, if necessary — React & React Native.
• Ideally, familiarity with CSS preprocessors, bundlers, and associated languages/syntaxes/libraries - Sass, Less, webpack
• Experience implementing testing platforms and unit tests
• Integrating front-end UI with the constructed API, using REST, GraphQL api

Soft skills:

• Appreciation for clean and well documented code

What you will do at Tradyl

• Partner with a highly skilled external consultancy and lead the effort of building a new modern front end to our website. 
• We use a no code platform for rapid development in this phase of our Journey. You will develop features on this platform. This might involve integration with back end APIs via REST.  
• Do short experiments: Example,  Evaluate a backend headless commerce software as a potential candidate for our backend tech stack.

•  Lead the design and implementation of our new web-based user interface for our partner management service
  •    Work effectively with product management, UX designers and backend engineers
  •    Commit to deliver high quality, robust, and accessible user interface
  •    Follow software development best practices including writing unit tests and perform code reviews
  •    Build reusable components and libraries and optimize for maximum performance
  •    Provide production deployment support and troubleshooting

What you need to be ready: 

•  Minimum 3+ years of experience in UI Development
•  Thorough understanding of React.js and its core principles with minimum 2 years of experience
•  Prior experience in building customer facing web Application
  •    In-depth knowledge of HTML, Typescript/JavaScript, CSS/Sass, and related frameworks and libraries
  •    Thorough understanding of React.js and its core principles with minimum 2 years of experience
  •    Experience in Single Page Application architecture
  •    Proficient in writing tests using Jest, Mocha or any similar framework
  •    Strong computer science fundamentals in design, data structures, and problem solving
  •    Excellent troubleshooting skills

We are hiring Front End Developers 2+ years Experience- Mid to Senior Level at Displaysweet (www.Displaysweet.com)

Technical Qualities Required:

Experience working on web applications based on Vue.js or Angular or React 

Solid knowledge of fundamental web technologies such as REST, HTML, CSS and JavaScript (ES2015+)

Interest in using Vue.js and its associated concepts to build a scalable web application

Great working knowledge of Git

A team-player, willing to help others through code review and pair programming

Open minded and always willing to further your own learnings

Quality oriented, a solid eye for detail, and good knowledge of data structures & algorithms

Bonus skills :

Experience with Hybrid/Native App development, NativeScript/React Native, Cloud Services (Firestore, AWS)

Excellent communicator

About the Company

DisplaySweet (www.displaysweet.com) is an innovative PropTech company creating world-class interactive experiences and sales software for the off the plan property industry.

Our core software is a content-rich sales presentation system designed specifically for property developers, agents and buyers.

Over the past 7 years, we have led the industry, transforming it to a digital platform, recently winning an industry award for the best property technology company in Australia. Our portfolio of clients includes some of the largest developers across Australia.