Frontend Developer

What you’ll do: 

● Own and build next-generation web applications which are efficient, reusable front-end abstractions 

and systems. 

● Explore and design lively and compelling consumer experiences. 

● Ensure that all the assigned systems are performing to scale. 

● Actively participate in design and code reviews to build robust applications and prototypes 

● You will mentor junior engineers on design and proper coding practices 

What you will need: 

● A deep expertise in React, Javascript, HTML5 and CSS3. 

● Understanding of browser internals and a basic understanding of the network stack. 

● Understanding of common design patterns followed in front-end projects. 

● Basic awareness of application security practices and deployment techniques for front-end projects. 

● Should have sound knowledge in computer science fundamentals like data structure, object-oriented 

programming and possess excellent communication skills. 

We are seeking a passionate and skilled React Engineer with over 1 year of experience to join our team. The ideal candidate will have hands-on experience building dynamic and responsive web applications using React.js. This role requires a strong understanding of front-end development principles and the ability to deliver high-quality, scalable solutions in a collaborative environment.

Key Responsibilities:

• Develop, maintain, and optimize web applications using React.js.
• Create reusable and modular components to ensure consistency and efficiency in development.
• Collaborate with designers and backend developers to implement user-friendly features.
• Debug and troubleshoot application issues to enhance performance and user experience.
• Integrate APIs and manage state effectively using tools like Redux, Context API, or React Query.
• Ensure responsive design and cross-browser compatibility for seamless user experiences.
• Write clean, well-documented, and maintainable code.
• Stay up-to-date with the latest React and front-end development trends.

Core Proficiency:

• Strong understanding of JavaScript (ES6+).
• Proficiency in React.js and its core principles, including JSX, hooks, and lifecycle methods.
• Experience with state management libraries like Redux, Context API, or React Query.
• Proficiency in styling in the component.
• Familiarity with Tailwind CSS for efficient UI development and responsive design.
• Experience with CSS-in-JS libraries like Styled-Components or Emotion is a plus.
• Familiarity with Next.js for server-side rendering (SSR), static site generation (SSG), and routing capabilities.
• Hands-on experience integrating RESTful APIs or GraphQL into React applications.
• Proficient in Git for version control and collaborative development.
• Basic understanding of testing frameworks like Jest, React Testing Library, or Cypress.
• Understanding of code splitting, lazy loading, and performance optimization techniques.

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.

QUALIFICATIONS: 

• Minimum 3-5 years of Experience in Java Backend development. 
• Degree in Engineering or Computer Science. 
• Good knowledge/experience in Data structure, Algorithms. 
• Proficiency with Programming Language: Java 1.8 and above (1.8 V must), J2EE. 
• Proficiency with Framework: Spring Stack (Security, Web MVC, REST), Hibernate, JMS. 

• Strong knowledge in any one Relational Databases (Mysql / Oracle / SQL Server). 
• Strong experience in Web services (SOAP and RESTFUL). 
• Tools & Utilities: STS / Eclipse / IntelliJ / NetBeans.Web/Application Server: Jboss. 
• Should have expertise in Design Patterns, Transactions, Multithreading concepts 
• Proficiency in Build Cycle management (Maven, Jenkins, Scripting). 

• Familiarity with Deployment technologies like Docker, Rancher and Virtual machines. 
• Familiarity with Agile Development processes. 
• Exposure to Spring Integration batch knowledge, OAuth2 authentication 
• Excellent verbal communication skills. 
• Good problem-solving skills with attention to detail. 

• Able to create functional, attractive applications that perfectly meet the needs of the user. 

About Yellow Riddle:

Yellow Riddle is a young, fast-growing, bootstrapped and fun startup with a partly remote team. The founders have both been an active part of the Shopify ecosystem for over two years now consulting over 100+ DTC brands across the globe. We solve complex solutions for our merchants and build best-in-class Shopify websites. Most of our clients are based in the UK, Germany, USA & India.

Check out our website, especially our case studies:

www.yellowriddle.com

About the Role: 

Yellow Riddle is looking for an experienced Front-end Shopify Developer to join our growing team with our increasing volume of Shopify work. Work would be spread across theme customisations, development and more complex migration projects from other CMS platforms to Shopify. One could also expect to be involved in maintenance and iterative site improvements. The key objective of the role is to be able to work on complex project requirements and be able to work across multiple projects.

You'll be a great fit!... if:

• You have strong knowledge in templating languages, and additionally Shopify Templates(Liquid), debugging and front-end skills.
• You know how to set up custom layout/content editors for our clients in Shopify.
• You have hands-on experience with Shopify, including at least two or more large-scale projects.
• You write clean theme code and can add and debug JS.
• You excel working in a remote environment, meaning you’re autonomous, self-driven, responsive, transparent, and self-organised.

Critical Requirements (Must-Haves):

• Minimum 3 years of work experience.
• Excellent verbal and written communication skills in English.
• Ability to demonstrate strong analytical skills & problem solving mindset
• Strong knowledge of HTML, CSS.
• Knowledge of JavaScript and jQuery
• Ability to develop responsive designs from PSDs, Invision or Adobe XD
• Shopify knowledge & ability to work on theme-kit

Preferred Requirements (Nice to Haves):

• Experience of working on Shopify Plus projects

Candidate Attribute (Culture Fit):

• Willingness to learn.

Mastree's engineering team is working towards building a data science engine that enables students to learn in a way they understand the best. We believe in delivering learning experiences through engagement. The product is designed with countless embedded interactive information pieces to help the students imbibe the concepts better. At Mastree we take pride in being a part of the product that holds the potential to revolutionise the education process.

We are looking for folks who are passionate about creating interaction rich interfaces. Creative individuals who believe in the power of visuals.

Responsibilities:

• Creating visual elements that users see and interact within our web platform.
• This makes your role crucial for the success of the product.
• Working closely with the design, product management and development teams to create elegant, usable, responsive and interactive interfaces across multiple devices.
• Ensuring that the application is optimised both in terms of technology and in delivering the best educational content.
• Building web platform for our live tutoring platform
• Creating interactive learning activities for K12 students and work on our upcoming products

Requirements:

• You are an avid programmer
• You have great grasp of fundamentals of JavaScript and ES modules, new ECMASCRIPT concepts
• You have experience in ReactJS web app development
• You are an exceptional problem solver, with attention to details.

Brownie Points:

• Good HTML and CSS skills
• Experience in React-Native app development
• Ability to work in small teams and wear multiple hats

Looking for someone to join our startup and work with us on several different projects. Strong communication skills are a must. 
Skills:

• Candidate with 2+ yrs of experience in UI development or theme implementation.
• Mandatory proficient understanding of web markup, including HTML5, CSS3, Javascript, JQuery, Bootstrap, Photoshop.
• Front-end (CSS) frameworks like Foundation or Bootstrap, Semantic UI.
• Design wireframe/layout for website, web application, mobile apps.
• Up-to-date, in-depth knowledge of modern HTML, CSS and JS.
• Basic understanding of server-side CSS pre-processing platforms, such as LESS and SASS
• An eye for design to pixel perfect website conversion.
• Hands on experience on creating responsive websites using media queries (not just Bootstrap).
• Working knowledge of cross-browser-compatibility and different sizes of different screens.
• Self-motivated, good communication and ready to learn attitude.
• Experience with various JS libraries like jQuery, BackboneJS, UnderscoreJS etc.
• Experience in layout designing & theme conversion on open source CMS’s like WordPress, Drupal.
• Good understanding of asynchronous request handling, partial page updates, and AJAX
• Optimize application for maximum speed and scalability.
• Good understanding of SEO principles and ensuring that application will adhere to them.
• Familiarity with tools such as Gimp or Photoshop is a plus.
• Proficient understanding of cross-browser compatibility issues and ways to work around them. - Proficient understanding of code versioning tools, such as Git

Responsibilities:

• Develop new user-facing features.
• Build reusable code and libraries for future use.
• Develop functional and appealing web and mobile-based applications based on usability
• Provide website maintenance and enhancements.
• Translation of the UI/UX design wireframes to actual code that will produce visual elements of the application
• Ensure the technical feasibility of UI/UX designs.
• Maintain graphic standards and branding throughout the product’s interface
• Stay up-to-date on emerging technologies promotes usability best practices.
• Optimize application for maximum speed and scalability. 
• Collaborate with other team members and stakeholders.
• Create quality mockups and prototypes on tight timelines.
• Proficient understanding of cross-browser compatibility, devices, responsive issues and ways to work around them.