Jobs React.js

An international product company — a leader in the live-streaming industry — is looking for a Senior Frontend Engineer in Warsaw.

The platform has over 450 million registered users and allows content creators worldwide to connect with their audiences and monetize their talents. The team consists of 350+ professionals globally.

They offer:

• Stock options
• Medical insurance (100% for employees and 75% for family members)
• Office lunches
• Parking
• Multisport card

Requirements:

• Experience with React.js
• Experience with Redux
• Experience with TypeScript

Location: Warsaw (office-based).

About the Project

We are developing an educational product for kids focused on learning English. The product was initially built as a mobile application and is now being expanded to the web.

We are looking for a Front-End Developer for a short-term engagement (up to 1 month) to implement web functionality based on the mobile app logic and user flows.

The web stack includes React.js, TypeScript, and Redux. The developer will work independently and take full ownership of the front-end scope.
 

Requirements

• Strong commercial experience with React.js
• Solid knowledge of TypeScript
• Experience working with Redux
• Experience translating mobile app flows into web interfaces
• Good understanding of responsive design principles
• Availability for a short-term, project-based engagement (up to 1 month)
   

About us

Syndicode is a value-driven software development partner with a globally distributed team of engineers, designers, architects, and IT managers. We are united by the mission to provide our clients with software products and services that perform, look, and work as designed.

We believe that our people and culture contribute to Syndicode’s ongoing success. Our team is unified by shared principles, including Accountability, Involvement, Excellence, Visibility, Integrity, Innovation, Win-Win, and Flexibility.

If it sounds like you, we’d be glad to meet you.

About the role

As a React Native Developer, you will be responsible for building and maintaining high-quality cross-platform mobile applications. You will contribute to architectural decisions, ensure performance and scalability, and collaborate closely with backend, product, and design teams to deliver reliable and user-friendly mobile solutions.

You will take ownership of complex features, improve development processes, and ensure high engineering standards across the mobile codebase.

What you’ll be doing

• Designing and developing cross-platform mobile applications using React Native
• Architecting scalable and maintainable mobile solutions
• Implementing complex UI components and ensuring pixel-perfect execution
• Integrating RESTful APIs and third-party services
• Ensuring performance optimization, memory efficiency, and responsiveness
• Managing app state using modern state management solutions
• Handling mobile-specific features (push notifications, deep linking, permissions, background tasks)
• Ensuring smooth app releases to App Store and Google Play
• Writing clean, testable, and maintainable code
• Conducting code reviews and mentoring other developers
• Collaborating with designers, backend engineers, and product stakeholders
• Participating in sprint planning, estimations, and technical discussions

What you’ll need

• 4+ years of commercial experience in mobile development
• Strong experience with React Native in production environments
• Solid knowledge of JavaScript and TypeScript
• Experience with modern React Native styling solutions (e.g., Unistyles or similar)
• Understanding of mobile application architecture patterns
• Experience integrating REST APIs and handling asynchronous flows
• Experience with server-state management libraries (e.g., TanStack Query / React Query).
• Experience with state management libraries (Redux, Zustand, or similar)
• Understanding of mobile performance optimization techniques
• Hands-on experience with React Native New Architecture (Fabric, TurboModules), Codegen, and advanced native module integration.
• Experience with push notifications using Firebase Cloud Messaging (FCM), OneSignal, or similar services (e.g., Notifee).
• Experience with mobile release processes (App Store / Google Play)
• Familiarity with Git and CI/CD workflows (Fastlane, or similar)
• Strong communication skills and ability to work in Agile environments
• Upper-Intermediate or higher English level

Nice to have

• Experience with native iOS or Android development
• Experience with automated testing (Jest, Detox, React Native Testing Library)
• Experience working with Firebase or other mobile analytics tools
• Experience with cross-platform performance debugging
• Experience mentoring developers

What you’ll get at Syndicode

• 15 days of vacation, 11 holidays, and 20 sick leave days per year
• Fully remote position
• Educational support and professional growth opportunities
• Internal tech meetups
• Continuous feedback and transparent communication
• Opportunity to influence technical decisions
• Self-management and flexible work approach
• Dynamic, fast-growing environment

We are seeking a skilled and experienced React Frontend Developer to join our team. The successful candidate will specialize in building modern, scalable, and high-quality web applications for our iGaming platform, contributing to both the maintenance of existing systems and the development of exciting new features.

 

Key Responsibilities

• Develop user-facing interfaces using React.js.
• Build scalable and maintainable components using TypeScript.
• Integrate REST APIs and manage global/local application states (e.g., Redux, Recoil).
• Implement responsive and cross-browser compatible UI designs.
• Build reusable UI components and contribute to maintaining a design system.
• Optimize front-end performance to enhance user experience (UX).
• Improve the frontend development environment and toolchain (Vite/Webpack, CI/CD).
• Collaborate closely with backend engineers, designers, and other stakeholders.
  
   

Required Qualifications

• 3+ years of professional frontend development experience.
• Strong knowledge and hands-on experience with React.js and its core principles.
• Proficiency in TypeScript, with a strong understanding of types and interfaces.
• Proven experience integrating REST APIs and a solid understanding of HTTP fundamentals.
• Experience with state management libraries such as Redux, Recoil, Zustand, etc.
• Familiarity with modern styling techniques (e.g., CSS-in-JS, Tailwind CSS, Styled-components).
• Experience working in Git-based collaborative environments (e.g., GitHub, GitLab).
  
   

Preferred Qualifications

• Experience with server-side rendering frameworks like Next.js.
• A strong understanding of UI/UX principles and component-based architecture.
• Experience with performance optimization techniques in React applications.
• Experience writing test code using frameworks like Jest and React Testing Library (RTL).
• Previous experience building design systems or working with tools like Storybook.
• Basic knowledge of backend development or DevOps practices.
  
   

What We Offer

• A competitive salary based on your skills and experience.
• Comprehensive health benefits package.
• An opportunity to work on a dynamic and growing iGaming platform.
• A collaborative and professional work environment.
  
   

Hiring Process & Timeline

We are tentatively planning to open our new office in Tbilisi in January. Our recruitment process is designed to be efficient and transparent:

• Initial Interviews: We will begin conducting interviews via teleconference as soon as possible.

In-Person Interviews: Strong candidates will be invited to schedule in-person interviews in Tbilisi during the first or second week of December.
 

Insiders is a fast-growing IT company which employs about 200 people. Our company focused on providing innovative digital services and cutting-edge technologies to solve complex business challenges.

We are located in Lviv and currently work in an office format. For candidates from other cities, we offer relocation (an apartment located near the office, this option is free).

What we expect from the candidate:

- Experience in building responsive user interfaces and designs using HTML/CSS.
- Solid knowledge of JavaScript and React/Next.js.
- Understanding of the latest trends and best practices in front-end development.
- Ability to use dev tools, debugger and package managers (npm, yarn).
- Basic understanding of REST principles.
- Experience with Git.
- Knowledge of how to effectively use GitHub during teamwork.

what we offer:

- free study in our Corporate English Academy

- growth and development opportunities for young developers even if you have no commercial experience

- regular salary review (after the completion of each contract)

- provision of Apple equipment

- comfortable office with all amenities not far from the center (uninterrupted internet, generator, tea and coffee, pastries).

- timely payment of salaries.

- corporate events, teambuildings, etc.

- working on projects side by side with Senior developers, which will give you the opportunity to learn and develop.

We are looking for a motivated and enthusiastic Trainee React.js developer to join our dynamic team. This entry-level position is ideal for recent graduates or individuals in the early stages of their software development careers who are eager to learn and contribute to our ongoing projects.

Responsibilities
- Follow a structured learning plan designed to progressively enhance skills in specific programming languages, tools, or frameworks.
- Complete assigned coursework and training modules within designated time frames.
- Actively engage in a mentorship program, seeking guidance from more experienced engineers.
- Regularly meet with a mentor to discuss progress, challenges, and career goals.
- Participate in hands-on sessions to apply learned concepts in real-world scenarios.
- Regularly read industry publications, technical books, and research papers to stay updated on new technologies and best practices.
- Apply creative thinking and coding skills to build solutions and prototypes under time constraints.
 

Requirements

- Theoretical and practical knowledge of React.js and its core concepts (components, props, state, hooks, lifecycle, context).

- Good understanding of the React ecosystem, including popular tools and libraries such as React Router, Redux / Zustand, React Query, Axios, Formik, and Styled Components / TailwindCSS.

- Solid knowledge of JavaScript (ES6+) and TypeScript.

- Understanding of universal web development concepts and technologies such as SPA, SSR (Next.js), Git, NPM, Webpack/Vite, Docker, and HTTP/REST APIs.

- Experience working with HTML5, CSS3, PostCSS/SASS, and responsive layouts using modern grid/flexbox techniques.
- Perfect English speaking skills is required, because all the process of technical interview will be in English

Will be a plus

- Experience with Jira 

- Commercial experience in software engineering will have a significant impact on the choice

- High level of self-organization, understanding of corporate culture and ethics

Working conditions

Full remote internship with international projects

Real conditions for special personal growth and development

Friendly and high skilled team with a huge commercial background

Training at the company expense with a mentors

Open process for the adapting to the client requirements and interviews

Permanent improvements personal qualities and skill 

We are a U.S.-based fintech startup operating in the investment and financial services space. Our distributed teams work across Poland, the United States, and Ireland, collaborating on technology-driven solutions related to stocks and investments.

Security, compliance, and the responsible handling of sensitive financial data are central to how we operate, as we build scalable products in a regulated environment.

Responsibilities

- Build responsive UI experiences using React + Nexus components. - Ensure accessibility (WCAG) and UX compliance.
- Integrate front-end with backend APIs.
- Optimize UI for performance and cross-device compatibility.

- Implement reusable UI components and design patterns.

- Participate in UI code reviews and testing.

- Troubleshoot and resolve UI defects.

Skills

- Strong React, TypeScript, modern frontend tooling.
- Experience with design systems (Nexus preferred).
- Understanding of accessibility standards (WCAG).
- Knowledge of frontend performance optimization.
- Familiarity with API integration & authentication flows. - Experience with Jest/React Testing Library/Playwright. - Strong CSS and responsive design skills.

Please read before applying:

The client is building a product in the bank/investment/brokerage systems niche, and their investors have strict security and compliance requirements, where every person will go through a background check.

What does this mean?

Before making an offer, they will check whether you have violated any EU laws.

Why Poland?

The client has teams in the USA, Ireland, and Poland.

For background check — you must be a taxpayer in Poland for 2+ years.

Build apps that truly make a difference. We're a fresh and ambitious AI studio creating meaningful, in-house products that empower people through better mental health, education, and personal growth. Our work combines human empathy with cutting-edge AI — and we're just getting started.

Role Description

We're looking for a versatile and experienced React Native Frontend Developer to join our passionate, fast-moving team. If you're excited by the idea of building mobile apps that are not just smart but soulfully designed, we want to hear from you.

What you'll do:

• Build and maintain cross-platform mobile apps using React Native and Expo
• Write clean, scalable, and maintainable code with attention to performance
• Work with the Expo toolkit (CLI, Go, EAS Build/Submit) to streamline development and delivery
• Collaborate closely with designers and backend developers to build seamless user experiences
• Integrate with RESTful APIs and backend services
• Use modern state management tools like Redux, Zustand, or Context API
• Build responsive UI components with care for animations and accessibility
• Identify and resolve bugs across platforms and devices
• Stay current with React Native, mobile UI/UX trends, and AI product design
• Contribute to product development through collaboration and experimentation

Qualifications

• 3+ years of professional experience with React Native
• Solid experience with the Expo ecosystem and its tools
• Strong knowledge of JavaScript (ES6+) and TypeScript
• Experience with state management libraries (Redux, Zustand, etc.)
• Comfortable working with REST APIs and modern development tools (Git, npm/yarn)
• Interest in AI-assisted development — experience with AI coding tools (Cursor, GitHub Copilot, or similar) is a plus
• Enthusiasm for building intuitive and well-designed mobile apps
• Strong problem-solving skills and debugging abilities
• Good communication and collaboration skills in a remote-first environment
• A portfolio showcasing React Native work (especially with Expo) is highly valued

What we offer:

• Full-time remote position with flexible schedule
• Work on meaningful AI-powered products that serve real human needs
• Culture of wellness, clarity, and purpose — we move fast, but with intention
• A small, values-driven team where your contributions matter
• The opportunity to build mindful, intelligent tech with lasting impact

About the Role
We are looking for a skilled React Native Engineer to help build and scale Scrambly's mobile app for iOS and Android. In this role, you will own the end-to-end implementation of key features for a high-traffic platform serving millions of users globally. You will be responsible for translating product requirements into robust software, ensuring that our mobile experience remains user-centric and competitive.

Your primary focus will be on writing performant TypeScript code within a modern React Native stack. You will play a crucial role in maintaining app stability, keeping the application fast, reliable, and easy to maintain. This position offers a strategic opportunity to impact business metrics directly by reducing technical debt and optimizing application performance.

Success in this role requires active cross-functional collaboration. You will work directly with Backend, QA, and Product teams to clarify requirements, solve complex engineering challenges, and deliver a seamless UX. Additionally, you will contribute to architectural discussions, helping to shape the technical direction of the product alongside senior engineers.

Key Responsibilities

• Design & Implementation:
  • Develop and maintain high-quality cross-platform applications using React Native and TypeScript
  • Build reusable UI components and highly performant lists (utilizing tools like FlashList or FlatList) that strictly adhere to design specifications
  • Integrate mobile apps with backend services via RESTful APIs and WebSockets to ensure real-time data synchronization
  • Debug platform-specific issues using Xcode and Android Studio, and write or modify native modules (Swift/Kotlin) when standard libraries are insufficient
• Engineering Standards & Quality:
  • Champion code quality by writing clean, testable TypeScript code and actively participating in peer code reviews to ensure standards for readability and maintainability are met
  • Contribute to the long-term health of the codebase by identifying and fixing technical debt and improving overall test coverage
  • Participate in architectural discussions, offering input on state management (e.g., Redux Toolkit, Zustand) and navigation patterns to improve scalability
• Performance, Reliability & Collaboration:
  • Monitor production stability using tools like Sentry or Crashlytics, proactively identifying and fixing crashes or errors
  • Optimize app performance by focusing on specific metrics such as frame rates, memory usage, app size, and battery consumption
  • Assist in maintaining CI/CD pipelines to ensure smooth and reliable releases to the App Store and Google Play
  • collaborate effectively with non-technical stakeholders to explain technical constraints and propose viable solutions

Requirements

• 3+ years of professional software engineering experience, with at least 2 years strictly focused on React Native development
• Strong proficiency in TypeScript and the React Native ecosystem (CLI, Hermes, debugging tools)
• Solid understanding of iOS and Android build systems (Gradle, Pods, signing/provisioning). You must have the ability to read native code (Swift/Kotlin) to debug platform-specific issues
• Familiarity with modern React patterns (Functional Components, Hooks) and state management libraries (Redux Toolkit, Zustand, or TanStack Query)
• Experience writing unit tests using Jest and familiarity with End-to-End (E2E) testing concepts
• Ability to explain technical concepts clearly to diverse teams
• English: Upper-Intermediate or higher (B2/B2+, written and spoken). You need to be able to communicate clearly in English to work effectively in an international team and participate in architectural discussions

Nice to Have

• Experience launching and maintaining a B2C app with 100k+ Monthly Active Users (MAU)
• Hands-on experience writing Native Modules or JSI/TurboModules from scratch
• Familiarity with mobile analytics tools (Segment, Amplitude) and A/B testing implementation
• Experience with automation tools like Maestro or Appium
• Knowledge of backend fundamentals (Node.js) to debug API integrations effectively

What We Offer

• Your code will impact millions of users globally. Performance optimizations you implement will translate into immediate value and improved user experience
• Work with the latest React Native tools and standards (TypeScript, Hermes, etc.) without being bogged down by legacy spaghetti code
• A collaborative environment with rigorous code reviews and knowledge sharing - we value the best idea, regardless of title or seniority
• A high level of ownership where you can see your features go live quickly in a fast-paced environment

We’re looking for a Front-end / Full-Stack Developer with strong experience in React and JavaScript / TypeScript, who can take ownership of features and confidently deliver results 🚀.

The role is frontend-first, with occasional small backend tasks when needed. You’ll work on modern web products, contribute new features, improve UX, and adapt interfaces for mobile devices.

 

🛠️ Key Responsibilities
 

🔹 Develop and maintain frontend features using React.js

🔹 Write clean, maintainable code with JavaScript / TypeScript

🔹 Implement mobile adaptation and responsive layouts

🔹 Fix bugs, improve existing features, and refactor when needed

🔹 Collaborate closely with designers, PMs, and backend developers

🔹 Take ownership of tasks and deliver them end-to-end

🔹 (Optional) Handle small backend tasks using Node.js / Nest.js

 

📋 Requirements
 

🔹 Strong experience with React.js

🔹 Confident knowledge of JavaScript / TypeScript

🔹 Basic to solid understanding of Node.js

🔹 Ability to work independently and take ownership of tasks

🔹 Understanding of modern frontend workflows and best practices

🔹 Attention to detail and responsibility for delivered features

 

✨ Nice-to-Haves
 

🔹 Experience with mobile adaptation / responsive design

🔹 Familiarity with Next.js

🔹 Experience with Nest.js or small backend contributions

🔹 Exposure to DeFi or blockchain-related products

 

🌱 Why Join Us?
 

🔹 Frontend-Driven Role – focus on UI, UX, and product experience

🔹 Ownership & Autonomy – you own features, not just tickets

🔹 Modern Stack – React, TypeScript, Node.js, Next.js, Nest.js

🔹 Remote-First Team – async, flexible, trust-based culture

🔹 Real Products – no pet projects, everything goes to production

🔹 Growth Opportunities – expand toward full-stack if desired

 

At FuturiX Solutions, we build modern digital products with real users and real impact.

If you enjoy shipping features, improving interfaces, and owning your work —

apply now and build with us 🌐✨

We power people’s progress.

At Preply, we’re all about creating life-changing learning experiences. We help people discover the magic of the perfect tutor, craft a personalised learning journey, and stay motivated to keep growing. Our approach is human-led, tech-enabled - and it’s creating real impact.

We’ve just reached unicorn status with a $150M Series D, accelerating our vision to transform education through human-led, AI-enhanced learning. Today, 100,000+ tutors teach 90+ languages to learners in 180 countries - and we’re only getting started. As a category-defining company, we’re shaping what the future of learning looks like at global scale.

Every Preply lesson sparks change, fuels ambition, and drives progress that matters. Joining Preply means helping define the future of education at global scale, and building something that truly matters for millions of people, every day.

What you’ll be doing:

• Develop high-quality, scalable, and reliable features for Preply mobile applications using React Native and launched in our A/B experimentation framework.
• Collaborate with cross-functional teams, including UX designers, product managers, and other engineers, to deliver innovative solutions that empower our learners and educators.
• Share your knowledge and expertise with the team and continuously learn from others to foster a culture of continuous learning and growth.
• Write clean, maintainable, and efficient code that sets the standard for excellence, contributing to the overall performance and code quality
• Participate in code reviews and ensure code quality to maintain our high standards.
• Continuously improve software engineering practices and methodologies to stay ahead of the curve and deliver value to our users.

What you need to succeed

• 5+ years in mobile development with React Native.
• Proficiency in JavaScript/Typescript and experience with popular React Native libraries (e.g. Reanimated, Apollo Client, Expo, React Navigation).
• Commitment to excellence and problem-solving skills to debug complex issues.
• Great communication skills and ability to collaborate with cross-functional teams to deliver results.
• Experience with agile software development methodologies to help us move fast and deliver value.
• Experience writing unit and e2e tests

Why you’ll love it at Preply

• An open, collaborative, dynamic and diverse culture;
• A generous monthly allowance for lessons on Preply.com, Learning & Development budget and time off for your self-development;
• A competitive financial package with equity, leave allowance and health insurance;
• Access to free mental health support platforms;
• The opportunity to unlock the potential of learners and tutors through language learning and teaching in 175 countries (and counting!)

Preferably with experience in apple/google TV apps.

We already have and Android and iOS apps with video content, and we need to extend them to Apple TV and Google TV without distracting the core team.

We’re building these TV apps because we plan to apply for the Apple and Google video programs.

 

application process via test task and then interview with head of engineering

We are looking for a Middle Strong Webflow Developer to join a US-based early-stage product team. The role focuses on developing and maintaining a Webflow-based marketing website with custom JavaScript, integration with a React checkout flow, Stripe payments, and reliable analytics and funnel tracking. The company is building a next-generation interface web platform that helps people capture ideas, thoughts, and context seamlessly, wherever they are. The product combines software and hardware, including a voice-first interface and a wearable device, designed to make interaction intuitive and fast.
 

Requirements:

• 3+ years of commercial experience working with Webflow.
• Strong hands-on experience building and maintaining websites in Webflow (CMS, layouts, components, interactions).
• Basic understanding of HTML/CSS and comfort working with small custom code snippets when needed.
• Experience setting up website analytics (GA4) and tracking key user actions.
• Understanding of how marketing websites work: user journeys, conversion points, and funnels.
• Experience working with UTMs and traffic tracking.
• Experience connecting Webflow websites with external tools (checkout systems, forms, third-party services).
• Ability to work independently, take ownership of tasks, and communicate clearly.

Nice-to-have:

• Experience working with product or startup websites.
• Familiarity with subscription-based or e-commerce products.
• Experience setting up tracking tools (Meta Pixel, Google tracking).
• Experience collaborating with developers on integrations.
• Experience working in early-stage or fast-moving environments.

Responsibilities:

• Build and maintain the company website in Webflow.
• Create clean, well-structured pages that are easy to edit and manage through Webflow.
• Implement layouts, sections, interactions, and CMS-driven content.
• Support product-related flows on the website (product pages, configuration sections, landing pages).
• Set up and maintain basic analytics and tracking across the site.
• Ensure the user journey from landing page to checkout is smooth and clear.
• Help connect Webflow pages with external tools and services (checkout, forms, analytics, etc.).
• Work closely with the product, marketing, and engineering teams.
• Support testing and improvements of pages to keep the site stable and conversion-focused.
• Help maintain tracking accuracy for marketing campaigns and traffic sources.

Welcome to ApexTech 🙌

We’re looking for a Senior/Middle React Developer who takes ownership of frontend architecture and enjoys building scalable, high-quality user interfaces. You’ll play a key role in shaping frontend decisions and delivering a polished product experience.

Responsibilities:
• Design, build, and maintain complex frontend applications using React
• Take ownership of frontend architecture, performance, and code quality
• Translate product and UX requirements into clean, maintainable UI solutions
• Collaborate closely with backend developers, designers, and product stakeholders
• Refactor and improve existing codebases, ensuring long-term scalability
• Contribute to technical decisions, best practices, and frontend standards
• Stay up to date with the React ecosystem and modern frontend trends

Requirements:
• 5+ years of experience in frontend development
• Strong, in-depth expertise with React and modern JavaScript (ES6+)
• Solid understanding of component-driven architecture, hooks, and state management
• Experience working with REST APIs and asynchronous data flows
• Strong knowledge of HTML, CSS, responsive layouts, and cross-browser compatibility
• Ability to think beyond implementation and consider performance, scalability, and maintainability
• High level of ownership, autonomy, and communication skills
• English level: Upper-Intermediate or Fluent
• Experience with TypeScript
• Familiarity with frontend testing (Jest, React Testing Library, etc.)
• Understanding of CI/CD pipelines
• Experience with Docker

Interview process:
1. Intro-call with the Recruiter.
2. Technical Interview.
3. Client Interview

What do we offer?
💻 Full remote work and meetings for brainstorming.
💡Freedom and flexibility.
🚀A team of top experts and the synergy of the entire organization.
💸Competitive salary.
🌿 Vacation and sick leaves.
🙏Therapy sessions with our psychologist.
📚Budget for professional development.
💃Corporate events and team building.

German software development company is looking for a skilled Senior React Developer, a strong team player, a real PRO to join their team to develop an MVP of their new SaaS product. 

Full-time, long-term. 
Trial period 1 month. 

Main requirements:

• English B2+
• Semantic HTML markup
• React with Server-Side Rendering (SSR) using TanStack Start
• TypeScript
• React Query for server state management
• CSS with Tailwind
• Experience with Design Systems
   

Nice to Have

• Experience with Vitest (unit testing)

• Experience with Playwright (E2E testing)

   

Other skills

• Strong communication skills - ability to articulate technical decisions and collaborate effectively

• Decision-making & reasoning - able to clearly explain and justify architectural and implementation choices