Вакансии React Developer

Our client is a global dog network powered by decentralized identity (DID), integrating biometric verification and artificial intelligence to ensure secure and seamless access. As a web2.5 product, the App combines pet services, social features, and gaming into a unified platform, delivering a streamlined user experience.
Tech Stack: React.js, Node.js, PostgreSQL, Expo, Superbase

Requirements:

• 5+ years of professional software development experience.
• Strong proficiency with React.js (hooks, state management, component architecture).
• Solid experience with Node.js and building RESTful APIs.
• Solid experience with the web3 domain
• Hands-on experience with PostgreSQL (schema design, queries, optimization).
• Mobile development experience with Expo.
• Experience integrating with Supabase (authentication, storage, and real-time features).
• Upper-Intermediate English
• Excellent problem-solving, communication, and teamwork skills.

Responsibilities:

• Design, develop, and maintain full-stack applications using React.js, Node.js, PostgreSQL, Expo, and Supabase.
• Develop scalable and maintainable systems, ensuring performance, security, and reliability.
• Collaborate closely with other team members
• Write clean, testable, and maintainable code.

Our client is a blockchain protocol / DeFi startup focused on providing fixed-rate lending, stablecoin issuance, and integrating real-world assets to bring more structured finance tools into the decentralized space.

Requirements:

• 5+ years of experience in frontend development with React / Next.js and TypeScript.
• Proven track record working on DeFi projects (lending, staking, vaults, or similar).
• Strong knowledge of wagmi and ethers.js/viem.
• Hands-on experience creating and integrating subgraphs (The Graph protocol).
• Experience with code refactoring in large-scale applications.
• Solid understanding of smart contract interactions from the frontend side.
• Strong problem-solving skills and ability to deliver under tight deadlines.

Nice to have:

• Experience with other DeFi protocols (Aave, Compound, etc.).
• Familiarity with testing frameworks (Jest, Cypress, Playwright).
• Contributions to open-source Web3 projects.

Responsibilities:

• Refactor and optimize the current frontend codebase for scalability and maintainability.
• Implement new features related to Morpho vaults and lending functionality.
• Integrate Web3 libraries (wagmi, ethers.js/viem) into the frontend.
• Work with The Graph (subgraph) for efficient data querying and indexing.
• Collaborate with the backend and product team to deliver high-quality features fast.
• Write clean, maintainable, and well-tested code.

Our team is growing, and we are looking for a talented Full-Stack developer. You will work in small teams on various products, from integrating multiple platforms into one dashboard to managing our data and analytics systems.
Our customer provides a property management software product and support services for the $100 billion Airbnb and vacation rental market. We are one of the fastest-growing high-tech start-ups in Tel Aviv, we are profitable and showing very promising results.
The team is all about accuracy, architecture, and impact. We handle complex business logic, data flows and transformations, and focus on providing high-most quality & accuracy.
We are looking for a full-stack developer with significant experience in high-scale systems, both on the client side and backend (95% Front End and 5-10 % Back End)
When you will join us, you will have a tremendous impact on Guesty’s success.
Stack: React, Node.js, MongoDB, PostgreSQL, Kafka, RabbitMQ, AWS

Requirements:

• At least 6 years of experience in development roles, preferably from startups (or other agile environments).
• Experience with React – Must!
• Experience with NodeJS/Typescript (ExpressJS/NestJS) – Must!
• Experience with Kafka, RabbitMQ, AWS.
• Experience in designing high performance, highly scalable microservices architecture with OOP design-patterns and complex business logic.
• Experience in relational databases and NoSQL databases (PostgreSQL, MongoDB, Redis).
• Proficiency in design of distributed enterprise systems – Advantage!
• Experience with SaaS platforms and startups – Advantage!
• Passionate about technology, enjoys solving complex problems and learning new technologies.
• B.Sc in Computer Science (or equivalent)
• A team player with strong communication skills.

Responsibilities:

• Design of the data-intensive web applications.
• Optimize performance to support the fast growing business.
• Write clean maintainable code.

Our customer provides a property management software product and support services for the $100 billion Airbnb and vacation rental market. We are one of the fastest-growing high-tech start-ups in Tel Aviv, we are profitable and showing very promising results.
The team is all about accuracy, architecture, and impact. We handle complex business logic, data flows and transformations, and focus on providing high-most quality & accuracy.
Our team is growing, and we are looking for an experienced Senior Front End Developer to join our dynamic and innovative team.
Stack: React, Node.js, MongoDB, PostgreSQL, Kafka, RabbitMQ, AWS

Responsibilities

• Bringing new features to life, from requirements to deployment
• Working closely with our product owners and designers to develop the best possible solutions
• Collaborating with backend developers to ensure api contracts are clear and efficient
• Ensuring that our product and code quality is top-notch
• Writing e2e and integration tests to build confidence in the product, writing unit tests as documentation when needed
• Caring about the product itself and striving to understand the problems our clients have
• Understanding the responsibilities of working on a living product with active clients
• Being ready to dive into the complex business logic of the financial or accounting domain

Requirements

• At least 6 + years of experience in development with React.js
• Be an avid follower of the technology industry and current technology/web-related trends
• Have a great product sense and software design sense; excellent technical judgment and architecture experience
• The ability to communicate effectively in a worldwide organization
• Experience working on large-scale web applications
• Ability to own projects end-to-end as demonstrated by significant open-source contributions, independent projects, team leadership, or startups
• Experience with SaaS platforms and startups – Advantage!
• Passionate about technology, enjoys solving complex problems, and learning new technologies.
• B.Sc in Computer Science (or equivalent)
• A team player with strong communication skills.
• English – B2 + – Must

Our mission at Geniusee is to help businesses thrive through tech partnership and strengthen the engineering community by sharing knowledge and creating opportunities. Our values are Continuous Growth, Team Synergy, Taking Responsibility, Conscious Openness and Result Driven. We offer a safe, inclusive and productive environment for all team members, and we’re always open to feedback. If you want to work from home or work in the city center of Kyiv, great – apply right now.

Requirements

• 7+ years of relevant experience in the IT industry, with strong expertise in, including ECMAScript;
• Proven experience leading teams in a mobile development environment;
• Deep expertise in React, Redux/MobX, Webpack, JavaScript and TypeScript;
• Experience with Redux Saga and dynamic pipeline development;
• Proficiency in GIT and branching workflows;
• Solid experience in unit testing and integration testing to ensure high-quality application development;
• Strong understanding of mobile application architecture and best practices;
• Experience working in agile, cross-functional teams, driving collaboration and innovation;
• Excellent problem-solving and decision-making skills with a proactive approach to addressing challenges;
• English communication skills: Upper-Intermediate level or higher.

What you will do

• Lead the development and support of complex, hybrid mobile applications using React , JavaScript, and TypeScript;
• Oversee technical decisions, define best practices, and establish coding standards for the team;
• Collaborate with stakeholders, product owners, and designers to define and drive the technical roadmap for mobile development;
• Understand and apply native mobile development concepts, with basic knowledge of Swift/Objective-C (iOS) and Kotlin/ (Android);
• Drive the adoption of scalable and maintainable architectures, ensuring high performance and reliability of mobile applications;
• Lead the integration of back-end and external APIs, including GraphQL, to enable efficient communication with backend services;
• Oversee and participate in code reviews, ensuring adherence to development standards and best practices;
• Own the deployment process, including preparing and publishing applications on the App Store and Google Play;
• Act as a technical point of contact for cross-functional teams and stakeholders across different geographies;
• Proactively identify and address performance bottlenecks and technical issues;
• Lead estimation and planning sessions, ensuring realistic sprint goals and on-time delivery of key features; Conduct technical interviews for hiring mobile engineers, ensuring the right talent joins the team;
• Foster a culture of collaboration, innovation, and continuous improvement within the team.

Binariks is looking for a highly motivated and skilled Middle Strong/Senior Full Stack Engineer (Node+React) to join our team on a healthcare project from the UK.

About the project:

A leading UK-based company specializes in revolutionizing surgical practices through digital transformation. Their groundbreaking healthcare platform integrates telepresence, content management, and data insights, facilitating seamless collaboration among hospitals, surgeons, and device companies for the exchange of information and expertise.

What We’re Looking For:

• At least 3 years of experience in Node and React development.
• Strong experience with Typescript.
• Experience implementing REST APIs.
• Experience with PostgreSQL.
• Experience with Agile methodologies.
• Experience in documenting requirements and specifications.
• Solid understanding of OOP, Responsive design, SOLID principles.
• Experience in documenting requirements and specifications
• People-oriented and a team player
• Ability to manage multiple tasks and prioritize them effectively
• Excellent written and verbal communication skills with customers
• Upper-intermediate level of spoken and written English

Will be a plus

• Experience with projects in healthcare domain
• Experience with AWS

Your Responsibilities:

• Developing a solution using best practices.
• Perform code reviews
• Maintain technical documentation for future reference.
• Troubleshoot and resolve issues as they arise during development.
• Collaborate with other team members on architecture and design decisions.
• Coordinate with QA and other stakeholders to ensure project success.

Привіт!

Ми шукаємо проактивного та бізнес-орієнтованого Junior Frontend Engineer до бізнесу Wisey, що підсилить напрям PMM та допоможе команді рухатися ще швидше.

Wisey — бізнес Universe Group, який будує сервіс для покращення персональної продуктивності користувачів з усього світу. Вже понад 4 млн користувачів долучились до платформи, яка містить унікальний контент та механіки, що присвячені боротьбі з прокрастинацією, підвищенню продуктивності, концентрації уваги, розвитку пам’яті, логіки, взаємин, психології та інших тем.

Тобі точно до нас, якщо:

• Хочеш працювати у продуктовій компанії, яка вже має мільйони користувачів і росте далі.

• Віріш у силу технологій, що допомагають людям змінювати звички й досягати результатів.

• Цінуєш середовище, де кожна ідея має значення, а твій код безпосередньо впливає на досвід користувачів.

• Любиш швидкий темп, нові виклики та хочеш розвиватися поруч із сильними інженерами й продактами.

• Цікавишся AI і прагнеш застосовувати його у своїй роботі.

Основні зони відповідальності

• Реалізація фронтенд-задач у PMM-напрямі: верстка, створення нових компонентів.

• Розробка нового функціоналу для продукту.

• Підтримка та розвиток Payload CMS.

Що потрібно, щоб приєднатися до нас:

Hard skills

• 1+ рік досвіду у фронтенд-розробці.

• TypeScript — базові знання типізації та використання в проєктах.

• React.js — робота з хуками, станом, життєвим циклом компонентів.

• Розуміння immutability/mutability в JS.

• Розуміння client-server architecture.

• REST API — підключення й використання зовнішніх даних.

• Анімації та плавні переходи в інтерфейсі.

Soft skills

• Бізнес-орієнтованість і проактивність.

• Аналітичність і здатність швидко навчатися.

• Ownership та бажання впливати на продукт.

• Інтерес до AI та готовність використовувати його в роботі.

Буде плюсом:

• Досвід з:

  • Astro – генерація статичних сайтів та оптимізація продуктивності фронтенду

  • Payload CMS – робота з headless CMS

  • Tailwind CSS – швидка та адаптивна верстка, робота з утилітарними класами

  • Компактність і повторне використання компонентів – розробка модульної архітектури інтерфейсів

  • Базові знання UI/UX – уважність до деталей, робота за дизайн-гайдами

Universe Group будує tech-бізнеси, перетворюючи ідеї на глобальні продукти. До групи входять три компанії: Guru Apps, FORMA та Wisey. Їхні продукти об’єднують понад 200 мільйонів користувачів зі 180 країн світу, спрощуючи буденність і створюючи нові можливості для розвитку.

Також Universe Group розвиває власний R&D-центр, який фокусується на дослідженні нових ідей, впровадженні інноваційних рішень та запуску бізнесів, що будуть частиною глобального технологічного ринку.

Що ми пропонуємо:

•  Office-first формат роботи - аll-inclusive офіс у Києві: у нас є все для твоєї комфортної роботи, а саме: сніданки, обіди, доріжки для ходіння, silent room для фокуса уваги — це далеко не все, що чекає на тебе в нашому спейсі. Ближче познайомитися з офісом можна переглянувши це відео або прочитавши статтю.

• Розвиток та навчання – твій ріст визначає успіх команди. Внутрішні тренінги та кращі експерти з України та світу допоможуть швидко прокачати навички.

• Кар’єрне зростання – у нас культура швидкого розвитку: до 10 менеджерів щороку отримують підвищення. Все залежить від твого бажання та результатів.

• Релокаційний пакет – комфортний переїзд до Києва з фінансовою підтримкою, допомогою рієлторів та адаптацією в новому місті.

• Один із кращих соцпакетів – винагорода відповідає запитам ринку, 20 днів оплачуваного відпочинку, співпраця через ФОП або Дія.City, оплачувані лікарняні, медстрахування та забезпечуємо харчуванням в офісі у Києві.

• Well-being program – ми турбуємося про ментальне здоровʼя команди, тому компенсуємо роботу з психологом, а також проводимо класи з йоги та медитації в офісі.  

• Підтримка під час війни – безпека та стабільність для тебе та твоїх рідних. Забезпечуємо всім необхідним для безперебійної роботи та долучаємось до ініціатив із відновлення України.

Надсилай своє резюме та ставай частиною нашого Всесвіту.

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Svitla Systems Inc. is looking for a Senior Front End Engineer (React) for a full-time position (40 hours per week) in Ukraine. The client is the first “on-the-way” crowdsourced delivery platform. They put extra space in passenger vehicles to work by connecting people with items to send to drivers heading in the right direction. The collaborative model enables fast, flexible, scalable delivery that reaches 90% of all U.S. households. They work with consumers, small businesses, and extensive global brands to help with same-day and urgent deliveries nationwide. The community of 200,000 verified drivers has delivered to more than 20,000 zip codes – the country’s most significant local same-day delivery footprint. The client makes it easy to launch same-day delivery with no set-up time or expense with their mobile and web applications. At purchase, customers can request a pickup in minutes and track their delivery from pickup to drop-off in real time. They work with top retailers, airlines, and grocers to provide a faster, more efficient, and more scalable solution for same-day and last-mile deliveries nationwide.
Overlap till 1 pm EST (20:00 UA/19:00 CET) is required

Requirements

• 6+ years of software development experience
• Strong React coding skills
• Ruby on Rails coding skills will be a plus
• Excellent communication skills
• Ability to work closely with UX designers and other internal stakeholders
• Demonstrated ability to learn new technologies quickly
• Strong critical thinking and problem-solving skills to identify and resolve application issues
• Experience writing clean, stable, and maintainable code in production environments
• A willingness to admit what you don’t know, and learn what you need to learn quickly
• Bonus: GraphQL

Responsibilities

• Write clean, high-quality, maintainable, and performant code
• Work with our existing front-end engineering team to roll out new features
• Work with our design team to build out a library of re-usable React components
• Collaborate with Engineering, Product and Operations teams to improve performance of existing systems
• Work in a fast-paced environment where we are frequently iterating to support the needs of our users, enhancing our apps and redefining feature roadmaps
• Plan and execute on short-term and long-term engineering goals individually and within the greater technology team

Svitla Systems Inc. is looking for a Senior React Engineer for a full-time position (40 hours per week) in Ukraine. Our client is a technology leader in transportation management, leveraging advanced technology to optimize fleet operations and enhance overall efficiency and safety through mission-critical software that supports North America's trucking and transportation industry. They offer a cloud-based platform that enhances fleet management, route planning, and operational efficiency.The platform utilizes artificial intelligence (AI) to automate and optimize daily fleet operations, improving real-time visibility and decision-making. The software suite includes tools for route planning, dispatch, workflow, telematics, fleet management, and electronic logging devices (ELDs), serving over 300 leading transportation fleets, including some with more than 1,000 vehicles. With the powerful and intuitive cloud-based fleet management platform and mobile app, trucking fleets can enhance operational efficiency, mitigate risk, and boost profitability.
Daily Stand-ups at 17:00 UA (16:00 CET). Overlap till 20:00 UA (19:00 CET).

Requirements

• BS/MS/PhD in Computer Science or related field
• 6+ years of experience in Front-End development
• 4+ years of experience with React, including Redux, web sockets, and Webpack
• JavaScript expert with experience in Typescript
• Strong skills in web fundamentals, including JavaScript/Typescript, the DOM, HTML, and CSS.
• Experience with AWS and microservice-oriented architectures.
• Experience and ability to validate design and UX.
• Excellent communication and collaboration skills.
• Resourceful team player that thrives in a fast-paced, startup environment.
• At least upper-intermediate English (spoken and written).

Nice to have

• Familiarity with logistics, transportation management, telematics, and/or geospatial technology.

Responsibilities

• Own the development of one or more front-end products, including system design/architecture, implementation, and technical debt management.
• Collaborate with product managers, designers, and engineers to design, develop, document, and deploy robust, enterprise-grade products and software.
• Share your knowledge by mentoring fellow engineers, assisting with design and code reviews, and promoting best practices.
• Take ownership and participate in all steps of the development process, from design to release and support.

The Ideal Candidate Has

• A sharp eye for great design and UX.
• Experience with NextJS and ExpressJS.
• Experience with AWS and microservice-oriented architectures.
• Familiarity with logistics, transportation management, telematics, and/or geospatial technology.