React.js Developer

The Opportunity At Certa, we are building the AI-native Operating System for global enterprise relationships. We have the clients (Fortune 100/500) and the robust backend technology. Now, under the guidance of our new Head of Design, we are elevating our experience to match the best consumer products in the world. We are looking for our First Design Engineer. You are the "missing link" between our pragmatic engineering requirements and our ambitious design vision. You won't just implement tickets; you will define how our product feels.

The Role This is not a standard Frontend Engineer role, nor is it a Product Designer role. This role is equal parts: Craft-focused Frontend Engineering: You write production-grade code, but you obsess over the details that others miss. Systems Thinking: You don't just build components; you build the architecture (Design System) that allows the rest of the team to build beautiful UI faster. Figma-to-Code Mastery: You bridge the gap between static Figma files and dynamic browser realities, moving fluidly between design and implementation.

What You Will Do

1. Architect the Design System & UI Patterns Take ownership of our internal design system. You will treat it as an internal product, creating a type-safe, accessible, and composable library in React & TypeScript. Manage the tokens, components, patterns, documentation, and governance required to scale design across a remote engineering team. Bridge the gap between Figma Variables/Tokens and code, ensuring a single source of truth for our visual language.
2. Make AI-Native UX Feel Trustworthy & Human Implement interaction patterns specifically for AI workflows: streaming states, progressive disclosure, and optimistic UI. Build for "explainability" and human-in-the-loop controls, ensuring users trust the system even when it automates complex tasks. Make complexity feel simple—especially when the system is performing sophisticated "smart" operations in the background.
3. Maximize Output with AI-Assisted Tooling Hyper-automate the mundane: Use AI coding assistants (Cursor, Copilot, etc.) to handle boilerplate and scaffolding, allowing you to spend 80% of your time on the 20% of the "feel" and "craft." Build tooling and guardrails (linting rules, visual checks, component playground workflows) that help the team ship high-fidelity UI consistently.
4. Bridge Design & Code (Figma-First) Live in Figma: You are expected to be as comfortable in Figma as you are in VS Code. You’ll tweak layouts, design missing states, and refine prototypes yourself. Push performance beyond just metrics: focus on rendering, bundle size, perceived speed, and interaction responsiveness. Raise the bar on accessibility and cross-browser behavior, ensuring the product is usable by everyone.

Must Haves

1. Expert Figma Skills: This is a primary requirement. You should be fluent in auto-layout, components, variables, and prototyping. You view Figma as a design environment and a technical spec.
2. AI-Assisted Workflow: You are a "power user" of AI tools (Cursor, Copilot, v0, etc.). You know how to leverage AI to move faster without sacrificing the quality of the final output.
3. Strong Frontend Foundation: Deep expertise in React + TypeScript with a track record of shipping complex, data-heavy UIs in production.
4. Demonstrated UI Craft: A portfolio showing obsession with spacing, typography, interaction detail, and motion. You likely have a "Folder of Inspiration" from the best apps in the world.
5. Design System Experience: Strong experience building and maintaining a design system: tokens, components, patterns, and documentation.
6. Accessibility Expertise: You build keyboard-first UX, understand screen reader behavior, and enforce correct ARIA usage by default.
7. Modern Tooling: Experience with Vite and modern frontend tooling; comfortable setting up and customizing JS tooling/build systems.

Why You? (The "Craft" Factor)

1. You are inspired by the design-engineering cultures of companies like Linear, Vercel, Family, or Arc (The Browser Company).
2. You get annoyed when a modal closes without an exit animation.
3. You understand that latency is a UX problem, and you use optimistic UI updates to make the app feel instant.
4. You believe enterprise software doesn't have to look like a spreadsheet from 2005—it should feel as fluid as the best consumer apps.
5. You are an "AI-augmented" engineer who uses modern tools to do the work of three people while maintaining the taste of an artisan.

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

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

• Experience with standard front-end development tools such as Babel, Webpack, NPM, etc.

• Thorough understanding of React.js and its core principles

• Familiarity with RESTful APIs and backend services

• Familiarity with code versioning tools such as Git, SVN, and Mercurial

• Familiarity with modern front-end build pipelines and tools

• Knowledge of isomorphic React is a plus

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

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

Job Description:

We are hiring Javascript developers to join our team in developing enterprise mobile applications. This person will work closely with the UX team, as well as, other engineering teams while developing applications and user interfaces.

Experience & Expertise:

• Highly skilled at front-end engineering using Object-Oriented JavaScript with at least 2+ years of extensive experience on Javascript libraries and micro frameworks
• Expertise on frameworks like , React JS, React Native, Redux, Typescript, etc is highly preferred
• Should have strong hands on mobile cross-platform application development
• Experience integrating user interfaces with middle-tier code and back-end data sources
• Strong analytical, problem-solving, organizational, and detail-oriented skills
• Must be able to work both on a team or individually, in an adaptable, agile environment
• Excellent communication skills

Job Responsibilities:

• Work closely with the user experience team to develop functional prototypes
• Work with development teams to implement user experience deliverables
• Contribute UI component code to a shared controls library and resource dictionary
• Participate in product definition and strategy development
• Collaborate with team members, developers, and third parties to ensure the integrity of the interaction is maintained throughout the project development life cycle
• Support quality assurance testing processes

Skills Required:

Ionic Framework, Angular 2, Redux, TypeScript, Cross platform, Micro frameworks, React JS, React Native,

We are seeking a skilled React Native developer with a minimum of 3 years of hands-on experience in the field. The ideal candidate will possess expertise in React, React Native, JavaScript, Nest.js, and Node.js. As a key member of our development team, the candidate will be responsible for designing and implementing robust and efficient React Native applications.

Responsibilities include collaborating with cross-functional teams to define, design, and ship new features, as well as maintaining and improving the performance of existing applications. The candidate should be well-versed in the latest trends and technologies in the mobile development space and demonstrate a strong understanding of user interface and user experience principles.

Key skills for success in this role include proficiency in React and React Native frameworks, advanced knowledge of JavaScript, and experience with Nest.js and Node.js. The candidate should be capable of troubleshooting, debugging, and optimizing code for performance. Effective communication and teamwork are essential, as the role involves close collaboration with other developers, designers, and stakeholders.

If you are passionate about creating cutting-edge mobile applications, possess the required skills, and thrive in a dynamic work environment, we invite you to apply for this exciting opportunity.

Responsibilities

• Take product ideas from ideation to implementation.
• Collaborate with Product and Design to create robust and usable features.
• Take ownership of the architecture for best performance and usability.
• Lead engineering discussions to ensure the best practices, maintainability and security of the application.
• Participate in design and code reviews.
• Lead and mentor the team of developers, to drive business objectives.

We are looking for

• 4+ years of experience building quality applications.
• Proficient in client-side JS frameworks such as React.js
• Passion for best design and coding practices and a desire to develop new bold ideas.
• Strong customer focus, ownership, and self-drive.
• Experience in planning, designing architecture and leading teams.
• Experience with SaaS products or an early stage startup is a plus.