Jobs React.js

Learned JavaScript and React and looking for a job?

We offer you a free 3-month internship at our company, where you will gain experience and the position of Junior React Developer.

Requirements:

- Medium level of knowledge of JavaScript

- Medium level of knowledge of React

- English: upper-intermediate ( speak/read/write)

How to become an intern?

A person who wants to become an intern in our company must have a medium level of theoretical knowledge of JavaScript and React, as well as the availability of term papers or projects that were developed at home for training purposes.

Only for ukrainians

We are a team of Lean Startup professionals for whom entrepreneurship and startup culture are not just a job, but a way of life. We are not just “to beat around the bush” ones who aim to fulfil all of the customer’s requests by adding more features to the project while “wasting the client’s budget”. We prefer to leave that to the classic outsourcing companies!
Our rich experience, enriched by hands-on work with startups and the application of the Lean Startup approach, is the key to our outstanding efficiency. Being on the market for 5 years, we have launched over 70 successful startups from scratch, working with clients around the world.
 
💡 We Create Startups for Clients from Different Countries
We specialise in helping entrepreneurs and startups from America/Europe launch successful digital startups at early stages. Our goal is not just to launch, but also to assist with the full understanding of the real market demand for the product, thereby saving years of work and significant budgets of our clients.
 
👥 A Team of Over 40 Experts
Our team consists of more than 40 specialists, each fully immersed in projects and ready to offer the best solutions at every stage of product development.
 
🚀 Our Advantages:
 

• Technological and Process Innovation. We actively integrate the latest technologies into our work and constantly update and automate our processes to avoid bureaucracy and accelerate results.
• Individual Approach to Projects. We are not just task executors; we strive to understand the unique needs of each project and realise them based on our expertise and innovative approaches.
• Strong Team Culture. Our team is distinguished by a high level of mutual assistance and support, openness to feedback, and an absence of toxicity, which contributes to a favourable environment for the growth and development of both projects and the personal development of each employee.

Challenges you’ll meet:
- Development of multilingual web applications.
- Project estimation;
- SEO/Core Web Vitals optimisations;
- Collaboration with designers to implement design accurately.

Requirements:
- 1,5+ years of commercial experience
- Good knowledge of JavaScript
- Experience with React and TypeScript,
- Redux-Toolkit and RTK-Query - understanding how the store works in an application,
- Good Next.js experience and understanding of SSR (Server Side Rendering),
- Experience with analytics,
- Knowledge and understanding of BEM(Block Element Modifier),
- Experience with I18n,

We offer:
 

• 4-Day Work Week (Mon-Thu): Enjoy a flexible schedule with a four-day workweek, giving you more time for learning, rest, and personal growth;
• Fully Remote Work with a Flexible Schedule: Enjoy the freedom to work from anywhere in the world with a schedule that suits you;
• 16 Business Days of Vacation: Take advantage of 16 business days of annual leave to relax and recharge;
• Additional Personal Event Days Off: Enjoy extra days off for personal events to celebrate and take care of what matters most;
• Unlimited Sick Leave: Health comes first. Benefit from unlimited sick leave to ensure you have the time to recover without worry;
• Personal Technology Purchase Program: Get support in purchasing tech gadgets for personal use, keeping you up-to-date with the latest technology;
• Internal Currency for Additional Perks: Earn our internal currency and exchange it for delightful perks like company merchandise, sweets, and certificates for various activities;
• Online Team Building Activities: Engage in fun and interactive online team-building activities, fostering collaboration and strengthening our remote work community;
• Sabbatical Leave: Take a break to recharge or pursue personal projects with our sabbatical leave option;
• Full Entrepreneurial Support: Receive complete support for your entrepreneurial status, including accounting assistance.

Let`s Launch Startups Together! 🚀

We are looking for a React Native Developer to build and launch AI-powered mobile apps from scratch on the App Store and Google Play.

Who we are

We are a team with over 8 years of experience in traffic acquisition and monetization. In recent years, we have been actively developing our own mobile apps (Android/iOS), focusing on rapid product launches, hypothesis testing, and scaling successful solutions. We build processes around AI and development automation to accelerate releases and improve product quality. Due to our expansion, we are looking for a strong React Native Developer to join our in-house team. 

Key Benefits

• Greenfield project—no legacy systems, everything built from scratch
• Opportunity to directly influence key technical decisions and architecture
• Fast releases without bureaucracy
• Direct interaction with the CTO
• We actively implement and encourage AI-assisted development

What we expect from you

• 5+ years of development experience (Mobile, Fullstack, or Frontend, React)
• 2+ years of mobile development experience and a solid React Native stack (Expo / EAS – a plus)
• Proven experience building and releasing mobile apps on the App Store and/or Google Play
• Understanding of the mobile app lifecycle and component design principles
• Experience with analytics SDKs and understanding of mobile analytics and attribution (Amplitude, Adjust)
• Proficiency in using LLM/AI tools during the development process
• Portfolio of completed projects that can be demonstrated or discussed in detail
• Strong communication skills and the ability to defend technical decisions with sound reasoning
• Ability to work independently and make technical decisions

Nice to have

• Experience developing apps with ad monetization
• Experience developing apps in the following verticals: Utilities, AI-driven apps, Lifestyle & Wellness, Dating / Social
• Experience developing native modules
• Full-stack background (Python, API and service development)
• Personal side projects brought to release

Technology Stack

React Native, Expo (EAS), TypeScript, Adjust, Amplitude, Sentry, Firebase, REST API, Supabase/PostgreSQL, RevenueCat, Git 

Your tasks

• Develop, maintain, and continuously improve AI-powered mobile apps built with React Native, with a focus on quality and scalability
• Manage full-cycle release management via Expo EAS
• Integrate, analyze, and optimize monetization (ad monetization, IAP) and product analytics systems
• Design and maintenance of CI/CD processes, including the implementation of Over-the-Air updates via Expo EAS
• Develop and launch MVPs to enable rapid testing of product hypotheses
• Participate in the planning, research, and development of new features
• Take end-to-end responsibility for feature development (including testing and documentation)

We offer:

• Fully remote work format with a strong focus on speed, efficiency, and measurable results.
• You’ll be part of a strong team without micromanagement, where independence and a healthy engineering culture are valued.
• Full-time schedule: 10:00–19:00 Cyprus time.
• 20 working days of paid vacation and paid sick leave.
• Probation period of 3 months
• Salary is negotiable and depends on your level and expertise.
• We follow the Cyprus public holiday calendar.

Requirements:

• Minimum of 2 years of experience with TypeScript and JavaScript
• Strong proficiency in React, Next.js
• Experience with Zustand / Redux or similar state managers
• Styling with MUI (Material UI), CSS Modules
• Familiarity with Git version control
   

Responsibilities:

• Develop and maintain modern React/Next.js applications, corporate websites, and landing pages
• Implement UI components using MUI and consistent design systems
• Manage application state using Zustand or modular state management solutions
• Write clean, reusable, and well-typed code using TypeScript
• Optimize performance, ensure accessibility, and follow best frontend practices

We Offer:

    •    Comfortable office located in the city center

    •    Competitive salary based on experience

    •    Paid sick leave

    •    24 days of paid holiday
 

To Apply: Send us your CV!

Company: Trusted Gaming – Part of Traffic Label Group

About Trusted Gaming
Trusted Gaming is a fast-growing division of Traffic Label Group, specialising in the creation of modern web platforms and user experiences for the online gaming and casino industry. Our products combine innovative design, high performance, and scalability. We’re expanding our front-end engineering team and are seeking a skilled React Developer to help drive new product builds and refine existing architectures.

About Traffic Label

Traffic Label is a fast-growing, data-driven technology company operating in the iGaming and affiliate marketing space, building scalable products focused on performance, analytics, and automation across global markets.

Role Overview
You will be part of a small but highly capable engineering team responsible for developing and maintaining performant, well-structured, and scalable front-end applications. This role involves collaborating closely with backend developers, UX/UI designers, and product managers to deliver best-in-class gaming experiences.
You’ll work primarily in React + Next.js, employing modern patterns, libraries, and tooling. The ideal candidate is both hands-on and detail-oriented, with a strong sense of quality and an interest in building well-architected systems that balance creativity and reliability.

Key Responsibilities

• Build interactive and responsive front-end components using React 19+ and Next.js 15+ (App Router, SSR, server actions).
• Develop modular, reusable code using modern frameworks like TypeScript, Tailwind CSS, and Mantine UI.
• Implement efficient data management with TanStack Query and TanStack Form.
• Integrate and manage REST APIs using tools such as Swagger / OpenAPI for consistent type-safe interfaces.
• Collaborate with the backend team on performance optimization, deployment, and continuous integration (CI/CD).
• Maintain and evolve a Turborepo monorepo architecture, ensuring clean development workflows.
• Apply best practices for code versioning and documentation using Git and relevant CI/CD tools.
• Contribute to architectural discussions, proposing improvements and shaping technical direction.

Skills & Experience Required

• Proven experience building complex, scalable web applications with React (v19+) and Next.js (v15+).
• Strong understanding of TypeScript and modern front-end tooling (Vite, Tailwind CSS).
• Experience with Mantine UI, React Aria Components, and responsive component design.
• Solid grasp of TanStack Query/Form, REST API integration, and Swagger / OpenAPI documentation.
• Familiarity with Turborepo and monorepo design principles.
• Working knowledge of Git and CI/CD pipelines.

Nice to Have

• Advanced React concepts: hooks, composition, compound components, render props.
• Advanced CSS techniques: animations, container queries.
• Automated API type generation (e.g. Orval).
• Code consistency and formatting tools: ESLint, Prettier, Biome.
• Exposure to Pixi.js, or general game development experience a plus.

What We Offer

• Fully remote role within Czech Republic – flexible hours.
• Collaborative and innovative culture across the Traffic Label group.
• Opportunities to experiment with emerging technologies in the gaming space.
• Competitive salary and benefits package tailored to experience.
• A chance to contribute to products that reach millions of users.

Smart Capital Center is an end-to-end, AI-powered platform for Commercial Real Estate (CRE) investment and financial management. We power real-time underwriting, asset management, and portfolio analytics through a combination of live data, workflow automation, and AI-driven insights.

Operating at the intersection of Generative AI, finance, and real estate, we are building systems that digitize and simplify complex financial workflows.

Our clients include leading institutions such as JLL, Pacific Life Insurance Company, and KeyBank. We are a lean, high-performance team building category-defining technology in a $17 trillion industry.

To learn more about our platform and vision, please visit our website: www.smartcapitalcenter.com

The Role

We are looking for a Middle Front-End Engineer who is passionate about building modern, high-performance web applications and thrives in a hands-on, collaborative environment.

This is a highly technical role focused on delivering intuitive, scalable, and responsive user experiences. You will work closely with engineering leadership, product managers, designers, and backend engineers to implement frontend features and improve the overall usability of the platform.

You will primarily contribute to building data-rich, user-facing applications using modern frontend technologies and best practices.

What You Will Do

Front-End Development (Core Responsibility)

• Design, build, and ship responsive frontend features and applications
• Develop modern UI components using React and TypeScript
• Implement complex, data-driven interfaces and workflows
• Translate product and UX requirements into polished user experiences
• Ensure seamless integration with backend APIs and services
• Own frontend features from development through deployment

UI/UX Engineering

• Build intuitive and user-friendly interfaces for complex workflows
• Optimize rendering performance and application responsiveness
• Improve frontend architecture, reusability, and maintainability
• Contribute to component libraries and design systems
• Ensure consistency across the platform’s UI/UX

Technical Contribution

• Write clean, maintainable, and well-tested frontend code
• Participate in code reviews and share frontend best practices
• Contribute to frontend architecture and technical discussions
• Help improve engineering quality, standards, and development processes
• Participate in troubleshooting, debugging, and performance optimization

Collaboration

• Work closely with Product, UX, backend engineering, and AI teams
• Contribute to end-to-end feature delivery
• Participate in Agile development processes
• Collaborate across teams to deliver high-quality product experiences

Requirements

Front-End Engineering (Strong Requirement)

• 3+ years of frontend software development experience
• Strong expertise in TypeScript, JavaScript (ES6+), HTML, and CSS
• Strong experience with ReactJS
• Experience with state management solutions (Redux, MobX, Zustand, or similar)
• Ability to build scalable and maintainable frontend architecture
• Strong focus on usability, responsiveness, and performance optimization
• Experience integrating frontend applications with REST APIs
• Good understanding of responsive design and cross-browser compatibility

Core Engineering Skills

• Strong problem-solving and debugging abilities
• Experience with Git and Agile/SCRUM workflows
• Attention to detail and strong ownership mindset
• Ability to work effectively in a collaborative team environment
• Good communication and organizational skills

Nice to Have

• Experience with data visualization libraries (D3.js, ECharts, etc.)
• Familiarity with design systems or component libraries
• Experience with testing frameworks (Jest, Cypress, Playwright, etc.)
• Familiarity with modern frontend tooling (Vite, Webpack, ESLint, etc.)
• Basic understanding of cloud platforms and deployment workflows
• Exposure to financial systems, analytics platforms, or real estate technology
• Experience working with AI-powered products or intelligent workflows
• Experience with AI-assisted development tools such as Copilot, Cursor, Claude Code, or similar

Why Join Us

• Work on cutting-edge AI-powered systems in a $17T industry
• Build modern, data-rich applications used in real-world financial workflows
• Collaborate closely with AI, product, and engineering teams
• High ownership and autonomy with meaningful technical impact
• Opportunity to influence frontend architecture and user experience direction
• Fast-moving, execution-focused team with minimal bureaucracy
• Exposure to modern technologies, AI-powered platforms, and intelligent systems

• Competitive compensation and flexible work environment

   

Apply Now

If you are passionate about building exceptional frontend experiences and want to work on impactful, AI-powered products in a fast-moving engineering environment, we would love to hear from you.

Apply today and become part of a team building the future of Commercial Real Estate technology.

We are seeking a Frontend Engineer to help maintain and improve an ecommerce platform built on Salesforce Commerce Cloud, while also participating in the transition to Salesforce Storefront Next. This role combines day-to-day frontend development with contributions to long-term platform modernization initiatives.

You will be involved in developing customer-facing functionality, improving responsive user interfaces, and supporting ongoing platform enhancements. The position offers the opportunity to work with both established technologies such as ISML, JavaScript, and jQuery, as well as modern frontend tools and frameworks including React, TypeScript, Tailwind CSS, and headless commerce solutions.

Key Responsibilities:
● Collaborate with internal stakeholders to deliver new functionality
● Maintain high standards of code quality and browser compatibility
● Contribute to frontend architecture improvements and engineering best practices
● Help create scalable and performant ecommerce experiences
● Develop and maintain frontend features within Salesforce Commerce Cloud
● Work with ISML templates, content assets, and Page Designer components
● Build responsive interfaces using HTML5, CSS3, BEM, JavaScript, and jQuery
● Improve user experience across desktop and mobile devices
● Participate in releases, bug fixing, and optimisation activities
● Support the transition to Salesforce Storefront Next
● Gain exposure to modern frontend technologies and practices: React, TypeScript,
Tailwind CSS, React Router
● Headless commerce architecture
● Vite, pnpm, and Git
● Work with Salesforce Commerce APIs (SCAPI) and REST APIs

Must-have skills:
● Commercial experience with Salesforce Commerce Cloud
● Solid knowledge of HTML5, CSS3, and JavaScript and familiarity with ISML templates
● Experience building responsive customer-facing applications
● Good debugging and problem-solving skills
● Experience with Git and JIRA
● Knowledge of React, TypeScript, and API integrations
● Ecommerce domain experience
● Team-oriented mindset and good communication skills
● Fluent English

In return we offer:
• The friendliest community of like-minded IT-people
• Open knowledge-sharing environment - exclusive access to a rich pool of colleagues willing to
share their endless insights into the broadest variety of modern technologies
• Paid vacations and sick leaves, including 5 paid days per year that don’t require a sick note
• English classes in 1-to-1 & group modes with elements of gamification
• Neverending fun: sports events, tournaments, music band, multiple affinity groups

🐳 Come on board, and let’s grow together! 🐳

✉️ Senior Frontend Engineer (AI-first role) | Remote (Europe) | B2B only

We are currently hiring a Senior Frontend Engineer for a trading / fintech product company working on a high-traffic, production-grade marketing platform serving multiple global locales.

This is a fully remote, Europe-based, B2B contract role only.

🚀 About the role

You will take full ownership of a mature frontend ecosystem built with:

Next.js (App Router), React 19, TypeScript, headless WordPress, and a custom Gutenberg block rendering engine.

The platform supports 30+ locales, real-time market data, and multiple third-party integrations across marketing, CRM, analytics, and personalization tools.

This is a high-responsibility engineering role, not greenfield — you will improve, scale, and optimize an existing architecture used at global traffic level.

🤖 AI-first engineering (core requirement)

This role is designed around AI-native development workflows.

You must be experienced in:

Agentic IDEs (Cursor, Claude Code, Windsurf or similar)
AI-driven multi-file refactoring and feature scaffolding
Context engineering (CLAUDE.md / AGENTS.md / rules for large codebases)
AI-assisted component generation (including Gutenberg block → React mapping)
AI-supported testing (Vitest + RTL with human-level validation)
Ability to detect and reject incorrect or hallucinated AI outputs

👉 Candidates who do not actively use AI as a core part of their workflow will not be considered.

🧩 Key responsibilities
Own frontend architecture, performance, and scalability
Work with headless WordPress + Gutenberg block system
Build multi-locale routing (next-intl, domain-based structure)
Integrate real-time market data via WebSockets / SignalR
Manage third-party integrations (GTM, CRM, analytics, personalization tools)
Ensure Core Web Vitals, SEO, and performance optimization
Work with CI/CD pipelines (Azure DevOps, Docker, AWS ECR)
Maintain design system consistency (Figma → code, tokens, Tailwind)
Write and maintain tests (Vitest, Testing Library)
🧠 Must have
5+ years frontend experience
Strong Next.js (App Router, SSR, ISR, RSC)
Advanced TypeScript in large-scale projects
Experience with headless WordPress + REST API
Multi-locale / i18n architecture experience
SWR for data fetching
WebSockets / real-time data handling
Strong understanding of SEO + Core Web Vitals
Experience working with design systems (no ad-hoc styling)
🌍 Location & contract
Europe-based candidates only
Fully remote
B2B contract only
📩 Apply / contact

About Us

We're MuseCool, London's largest music school, now building The Muse, an innovative platform that assists music tutors in delivering personalised lessons and improving student engagement.

You'll help us develop a cutting-edge music lesson understanding engine, to be used in thousands of real lessons. Expect messy audio, real students, real tutors, real data, and the chance to build something no one has built before.

This is a fully remote role for Ukraine-based candidates. We work with an overlap with London hours.

The Role

We're hiring a Frontend Engineer (Music Education Games) to build interactive music-learning interfaces that respond to live piano playing. Games will be integrated with our real-time lesson analysis engine and become one of the high-value features of our solution.

This isn't static web development, it's about creating smooth, engaging, and playful musical experiences where timing, visual feedback, and audio synchronisation must all work flawlessly together.

You'll work with our team of engineers to turn analysis outputs into delightful, effective learning games for children.

What You'll Work On

• Build interactive music game interfaces with real-time visual feedback for piano practice
• Create original game mechanics with real-time performance feedback
• Implement smooth, performant animations and transitions that respond to live audio analysis
• Optimise for timing precision and implement responsive interfaces that work across devices
• Balance polish with pragmatism. Ship features that work, then iterate

Requirements

• Strong frontend fundamentals (Next.js + React + TypeScript)
• Experience building performant, interactive web interfaces with complex timing requirements
• Experience with animation, transitions, and creating smooth user experiences
• Basic music knowledge (played an instrument at an amateur level or above)
• Comfortable working remotely with some overlap with London hours

Nice-to-Haves

• Experience with animation libraries like GSAP, Framer Motion, or similar
• Experience with Canvas, SVG animation, or game-style rendering
• Familiarity with animation tools like Rive, Lottie, or After Effects
• Experience with game development, education apps, or interactive multimedia
• Knowledge of Web Audio API or audio-visual synchronisation
• Familiarity with MIDI and music notation rendering (Verovio, etc.)
• Experience with real-time systems or performance optimisation
• Mobile development experience (React Native or similar)
• Some backend or full-stack experience. Useful when a feature needs API support or cross-stack changes
• Background in children's educational content
• Curiosity about music pedagogy and learning psychology

Don't tick every box? Apply anyway if you're passionate about music education technology and eager to learn - we value curiosity and drive as much as experience, and we want people who can grow into the role.

What We Offer

• $2,000–3,000/month depending on experience
• Autonomy, ownership, and the chance to build something truly original
• Rapid development and growth as the company scales
• Weekly online instrument lessons - you get too choose which instrumet you want :)

To Apply

Please provide the following with your application:

• CV
• Link to 1-2 projects you've built (live demo, repo, or portfolio)

Interviews ongoing - we hire fast when we meet the right person!

Please note that the vacancy is only for candidates ready for offline format of work in Uzhhorod.

Build the most meaningful apps on the latest web technologies!

ABOUT ELEMENTICA

Welcome to Elementica! We are excited to see you on our profile. Elementica is a leading global software development company – expert in delivering web development, mobile application development and IT consulting services of any complexity to clients worldwide.

www.elementica.io

JOB POSITION

We are looking for a talented React Developer to join our Development Team. You will be at the core of our talented Web Apps teams and focus on building the most advanced and meaningful apps and workflows on the latest web technologies.

RESPONSIBILITIES AND DUTIES

As a frontend developer, you will work on our next generation applications, a specific project critical to our customer’s needs. We need our engineers to be versatile, display leadership qualities and be enthusiastic to take on new challenges as we continue to push technology forward.

We are Product oriented developers with a growth mindset. We are curious problem solvers and we like to collaborate, communicate, share knowledge and technical ideas and grow together.

What you’ll do:

- Develop cloud based frontend web applications

- Work in all phases of the software development life-cycle (planning, design, implementation, deployment, monitoring and support)

- Collaborate and grow in a dynamic environment while working in small, agile and cross functional teams

- Use the latest technologies to solve real problems for our customers

- Communicate and coordinate with our engineering team in Ukraine.

What we look for in you:

- Results-orientation, collaborative, pragmatic and agile mindset

- Strong knowledge in working with Javascript, Typescript

- Expertise with the cloud (preferably Microsoft Azure)

- Working proficiency in English (written and verbal)

- Continuous independent learning

We are looking for these skills/experience:

* Strong knowledge of JavaScript and TypeScript

* Experience with React hooks, CSS-in-JS, Redux, Jest, Next.js
* Pixel-perfect designs implementation practice

* Experience working with websockets

* Proficiency in unit and e2e testing, Jest, react-testing-library

* Understanding of common development principles and best practices (SOLID, DRY, YAGNI) and basic understanding of design patterns

* Experience in CI/CD processes is a plus

* Experience with web performance optimizations

What we offer:

* The opportunity to drive the development of cutting-edge software products

* The chance to work on interesting technical challenges such as advanced algorithms, wide integrations or scalable content management

* A positive, highly skilled, young team with a focus on quality

* Hybrid working possibility / Flexible working hours

* Pick your own gear: Linux or IOS - whatever works best for you

* A lot of room for your own ideas. We always highly encourage you to work on them together with the team.

* Outstanding compensation based on experience and 20 days vacation

* Sponsored training opportunities with Udemy

Our job offer React Developer sounds interesting? Then we are looking forward to receiving your application!

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.

Our client is a leading, fully regulated US-based digital asset trading platform. They provide secure, low-latency access to cryptocurrency markets, acting as a bridge between traditional finance and the Web3 ecosystem.

About This Role

The Senior Software Engineer, Web is part of the Engineering team and reports to our Manager, Engineering. As a Senior Software Engineer, Web, you will be responsible for designing and building scalable, high-performance web applications using Next.js and modern front-end technologies.

You will partner with Product, Design, Backend, and DevOps teams to deliver performant, accessible, and secure user experiences while contributing to front-end architecture and engineering best practices.

Key Responsibilities

• Design and implement scalable front-end features using Next.js, React, and TypeScript.
• Own end-to-end development of web features, including testing, deployment, and maintenance.
• Build modular and reusable UI components to support scalable development.
• Optimize web performance through SSR/SSG, lazy loading, and responsive design techniques.
• Monitor and improve performance metrics such as page load time, TTI, and Core Web Vitals.
• Collaborate cross-functionally with Product, Design, Backend, and DevOps teams to define requirements and deliver features.
• Contribute to front-end architecture decisions and engineering best practices.
• Participate in code reviews and mentor junior engineers to improve code quality and team standards.
• Partner with DevOps to support CI/CD pipelines and reliable deployment processes.

• Ensure high standards in code quality, accessibility, security, and automated testing (unit, integration, E2E).

   

Required Qualifications

• Bachelor’s or Master’s degree in Computer Science or related field.
• ~8 years of professional software engineering experience, or ~6 with an advanced degree.
• Strong communication and collaboration skills, motivation, problem solving mind set. 
• Strong proficiency in Next.js, React, TypeScript, JavaScript, HTML5, and CSS3.
• Strong experience with GraphQL and REST API.
• Experience with performance optimization tools (Lighthouse, WebPageTest, Chrome DevTools).
• Solid understanding of SSR/SSG, CDN strategies, caching, and responsive design principles.
• Familiarity with front-end security best practices.
• Experience with Git, CI/CD pipelines, and modern deployment workflows.
• Exposure to cloud platforms such as AWS or GCP.
• Strong collaboration skills working with Product, Design, and Backend teams.
• Experience mentoring junior engineers and contributing to team development.

• Bonus: Experience with analytics instrumentation or blockchain-integrated front-ends (e.g.,ethers.js, wallet integrations).

   

We offer*:

• Flexible working format - remote, office-based or flexible
• A competitive salary and good compensation package
• Personalized career growth
• Professional development tools (mentorship program, tech talks and trainings, centers of excellence, and more)
• Active tech communities with regular knowledge sharing
• Education reimbursement
• Memorable anniversary presents
• Corporate events and team buildings
• Other location-specific benefits

*not applicable for freelancers

We seek a talented Strong Middle FE Engineer to join our team and help build a humanitarian transparency platform. This role involves designing and developing user interfaces for both a desktop web application and a Progressive Web App (PWA) for mobile, working as part of a cross-functional team.

 

🧙‍♂️ In This Role You Will

• Design, build, and maintain responsive UI components for desktop and mobile (PWA).
• Implement offline-first architecture using Service Workers, IndexedDB, and client-side caching strategies.
• Build robust data synchronization logic between client and server, including conflict resolution and offline queue management.
• Integrate REST APIs into the frontend layer.
• Contribute to architectural decisions for both web and mobile experiences.
• Ensure offline-first behavior and performance in low-connectivity environments.
• Write clean, maintainable, and testable frontend code.
• Document your work and support knowledge sharing within the team.

🎯 You May Be Interested If

• You enjoy building interfaces that are both functional and intuitive.
• You care about performance, accessibility, and real-world usability.
• You're excited to collaborate in a remote, cross-functional environment.
• You value autonomy, clear communication, and working in a supportive, small-team setting.
• You thrive in an environment that encourages continuous learning and self-improvement.

👌 Role Requirements

• 3+ years of experience in frontend development with React.
• Strong proficiency in TypeScript.
• Solid experience building and deploying Progressive Web Apps (PWA) to production.
• Hands-on experience with offline-first architecture, Service Workers, and Workbox (or equivalent).
• Practical experience with client-side storage solutions: IndexedDB (Dexie.js, idb, or similar), Cache API, localStorage.
• Experience consuming REST APIs and managing application state.
• Solid understanding of Web APIs relevant to PWAs: Push API, Notifications API, Background Sync, Storage API.
• Familiarity with Docker-based development environments.
• Proficiency with Git and standard development tooling.
• English proficiency at B1 level or higher.

Nice to have:

• Experience with hybrid app frameworks (Capacitor, Ionic) for wrapping PWAs into native iOS/Android apps.
• Experience with TanStack Query (React Query) for server state management and caching.
• Experience with React Native for native mobile app development.
• Familiarity with data visualization libraries (e.g. Chart.js, D3, Recharts).
• Experience with GIS or map-based UI components (e.g. Leaflet, Mapbox).
• Experience with WebSockets or real-time data synchronization (Socket.IO , native WebSocket, SSE).
• Familiarity with end-to-end testing tools (Playwright, Cypress).
• Experience working with design systems or component libraries.

💻 Working Conditions

• Employment Type: Full-Time
• This is a fully remote position with the entire team across Ukraine.
• 20 working days of paid vacation per year.
• The team collaboratively defines deadlines, ensuring a balanced and manageable workload. The focus is on delivering commitments on time.
• Flexible working hours to promote a healthy work-life balance.

Position name: Senior React Native developer
Level: Senior Only
Hard skills requirements (including years):

• A minimum of 6 years developing React Native applications.
• Experience with Expo, Expo Router, Tamagui UI Toolkit, Zustand/Tanstack Query for state management

Soft skills requirements:

• Ability to work independently and collaboratively in a team environment.
• Excellent problem-solving skills and attention to detail.

Office/Remote: Remote
Project tasks:

• Pixel-perfect replication: Replicate the Lovable mobile site exactly. Every hex code, shadow, and frosted-glass effect must match the high-end web design 1:1. We do not compromise on design quality.
• AI-Streamlined Porting: Leverage Claude/LLMs to "convert" our React web logic and Supabase calls into high-performance React Native code to maintain startup speed.
• High-end Performance : Implement a vertical video feed using FlashList and the New Architecture to ensure 60-120fps scrolling with zero "jank."

English level: Upper

We are a Ukrainian outsourcing company Join.To.IT, founded in 2012, and delivering software solutions across diverse business domains.
We focus on building long-term partnerships with our clients and delivering solutions that create real business impact. Our team consists of experienced professionals who take ownership of their work, value clear communication, and are committed to high standards in everything they do.
At Join.To.IT, we create an environment where engineers can grow, influence technical decisions, and contribute to meaningful projects alongside a strong and supportive team. 

Responsibilities
Develop and maintain web applications using React.js
Participate in team and client calls, discussions, and troubleshooting sessions
Ensure high performance, responsiveness, and quality of applications
Maintain and improve code quality, structure, and scalability
Collaborate with cross-functional teams (backend, QA, design)
Provide occasional support for business or customer-related requests
Take ownership of tasks and contribute to continuous improvement

Requirements
1+ year of commercial experience with React.js, Redux, and TypeScript
Strong knowledge of JavaScript  
Experience working with AI agents - Claude code | Cursor | windserf | Codex GPT | Antigravity
Familiarity with Figma tools
Project estimation skills
Experience working with WebSockets
Proficiency in HTML5, CSS3, and CSS preprocessors (Sass/Less)
Experience with Git and version control workflows
Experience working on complex systems in a team environment
Strong communication skills and collaborative mindset
Upper-Intermediate (B2+) English or higher

Nice to Have 
Familiarity with Docker or basic DevOps practices
AWS, Digital Ocean

We Offer
Office-based or hybrid work format (Kyiv, near Vasylkivska metro station with shelter, Starlink and uninterrupted power supply)
Free gym access near the office
Paid vacation and sick leave
Compensation for professional courses and development
Supportive and loyal management