Вакансії JavaScript Developer

Requirements

We know that sometimes, you can’t tick every box. We would still love to hear from you if you think you’re a good fit!

• Software Design:
  • Following the best practices and defined standards for implementing the NodeJS services
  • Experience in implementing services with REST, gRPC approach
• Software development:
  • Knowledge and experience in implementing NodeJS services by using modern JavaScript, and TypeScript
  • Prior record of use NodeJS features and 3rd party tools
  • Hands-on experience in writing queries to SQL and noSQL databases
• Quality Assurance:
  • Practical experience in writing unit/integration tests. Able to spot the issues and define a Technical debt
• Software Deployment:
  • Clouds AWS, Docker Experience of using cloud platforms (AWS). Understanding Docker configuration. Follows the established containerization process

ELEKS Quality Assurance Office is looking for a Senior Automation Test Engineer (Python+JS) in Ukraine, Poland or Croatia.

About project

The project is a web-based platform for financial advisors.
The client portal allows advisors to control the user experience by enabling or disabling features and functionality for each client.

Requirements

• Experience with end-to-end test automation (UI, API)
• Experience in smoke testing and result analysis
• Test maintenance and refactoring
• Performance testing with k6 (JavaScript)
• Database validation (SQL, SQLAlchemy)
• Page Object Model (POM) usage
• Experience with design patterns: Factory, Singleton, Strategy, etc.
• JavaScript – for performance & frontend tests (k6, Playwright, Cypress)
• SQL – complex queries and DB checks
• UI testing: Selenium (Python), POM
• API testing: requests, Postman, Swagger, JSON schema
• Git/Bitbucket – branching, pull requests, code review
• BrowserStack TurboScale – cloud cross-browser testing
• Upper-Intermediate level of English

Responsibilities

• Be responsible for the delivery, performance testing, measurements, general reports, etc
• Review, analyze and assess project requirements and specifications as well as product functionality to convert them into quality control process artifacts
• Prepare and acquire test data
• Develop, execute, refactor and optimize automation scripts
• Log and evaluate results and document deviations from the expected results
• Understand Business Requirements and design architecture according to business needs
• Collaborate with team members to follow best practices and requirements
• Communicate with a customer side

As a frontend developer in the Wix Editor team, you'll play a key role in shaping one of our flagship products. You'll work on developing fundamental features, modernizing our infrastructure, and creating solutions that empower millions of users.

In your day-to-day, you will:

• Make technical designs for new features
• Own one of the team’s products
• Work closely with designers, writers, QA engineers, and PMs (locally and abroad) to ensure that products are beautiful and meet modern development best practices
• Advocate for improvements in the codebase
• Pick your own challenges and grow in a direction of your choosing

This is a hybrid position, and the team is expected to balance their time between in-office and remote work. This allows us to maintain the flexibility of remote work, with the added benefits of in-person collaboration.

Requirements

• 3+ years of experience as a frontend engineer
• Proficiency in JavaScript, React, and TypeScript
• Passion for writing clean, maintainable code and driving improvements
• Good communication and analytical skills with a passion for learning and the ability to think critically
• Familiarity with tools like react-query or signals – an advantage

Expanding core engineering team ready to jump into one of several directions – from AI-focused products to EdTech and FinTech platforms.
This position is perfect for developers who enjoy a flexible environment and the chance to work on diverse, impactful projects.

Requirements

• 4+ years of experience with JavaScript, including ES6+ and TypeScript;
• 3+ years of experience with React, Redux, Webpack;
• Familiarity with unit and integration testing;
• Experience with GraphQL (Apollo);
• Proficient with GIT and branching workflows;
• 2+ years of experience with advanced Node.js frameworks (e.g., NestJS);
• Solid experience with application optimization, performance tuning, and load balancing;
• Strong database skills: schema design, complex queries, and management;
• Solid understanding of OOP, functional programming, and MVC design patterns;
• Experience with cloud services (preferably AWS) and CI/CD pipelines;
• Knowledge of serverless architecture and scalable infrastructure;
• English proficiency – Intermediate Strong or higher.

Would be a plus

• Experience with Next.js and Tailwind CSS;
• Hands-on experience with Python;
• Exposure to AI frameworks.

What you will do

• Develop and maintain scalable, production-ready applications;
• Implement modern, performant, and secure features across both frontend and backend;
• Integrate APIs, databases, and third-party services, ensuring app stability and scalability;
• Collaborate with cross-functional teams across geographies in an agile environment;
• Participate in estimations, planning sessions, and code reviews;
• Identify and resolve performance issues; write clean, testable, and maintainable code;
• Contribute to a positive, open-minded, and professional team culture.

Svitla Systems Inc. is looking for a Senior Full-Stack Developer with Design Experience for a full-time position (40 hours per week) in Ukraine. Our client is a biopharmaceutical company engaged in developing and commercializing products and treatments in dermatology and aesthetic medicine. Its products include RT001, a physician-applied topical botulinum toxin type A (BoNT-A) for cosmetic, hyperhidrosis, and dermatologic indications. It is dedicated to creating transformative aesthetic and therapeutic treatments using its proprietary technology platform. It is based in Mountain View, California.

Requirements:

• Proven experience as a Full Stack Developer or similar role.
• Strong knowledge of HTML, CSS, and JavaScript for the front end.
• Experience with Node.js and Svelte for server-side development.
• Experience with deploying using Turborepo, GitHub, and Vercel.
• Solid understanding of responsive design principles and mobile-first development.
• Knowledge of npm build tools and package management.
• Understanding of database design and optimization.
• Familiarity with version control systems (e.g., Git).
• Ability to collaborate effectively with cross-functional teams.
• Excellent problem-solving skills and attention to detail.
• Up-to-date knowledge of the latest industry trends and emerging technologies.
• Experience working with design tools, especially Figma.
• Experience with WordPress and PHP development.
• Strong understanding of accessibility principles and experience implementing accessible web solutions.

Nice to have:

• Knowledge of front-end frameworks such as Next.js, Vue.js, and Svelte.
• Knowledge of CSS preprocessors (e.g., SASS or LESS).
• Familiarity with RESTful APIs and asynchronous request handling.
• Understanding of SEO principles and best practices.
• Experience with Google Analytics + Google Tag Manager.
• Experience with SQL, No-SQL databases, GraphQL, and Cache databases.

Responsibilities:

• Collaborate with cross-functional teams, including designers and developers, to implement responsive and user-friendly web interfaces.
• Translate design concepts from tools like Figma into clean, efficient, and maintainable code using HTML, CSS, and JavaScript for the front end.
• Develop and maintain server-side logic on the Vercel platform, Svelte web framework, and Redis database.
• Design and implement database schemas, as well as perform database optimizations.
• Ensure the technical feasibility of UI/UX designs and implement responsive design principles with a strong emphasis on accessibility.
• Conduct accessibility audits and implement solutions to ensure compliance with accessibility standards (e.g., WCAG).
• Optimize applications for maximum speed, scalability, and accessibility.
• Work closely with designers to create and implement interactive design elements with accessibility considerations.
• Stay up-to-date with the latest industry trends, best practices, and guidelines related to accessibility.

We are actively growing and looking for a Frontend Developer to join our team that:

• Builds and maintains several product projects for the Western market;
• Writes clean, efficient code without compromising quality for speed;
• Works according to agile processes with full transparency at every stage – from idea to production.

Our approach is an engineering culture, where every developer understands why they are writing a particular component and how it impacts the product.

Responsibilities:

• Develop and maintain interfaces based on React and Symfony (Twig).
• Debugging and performance optimization.
• Develop adaptive, cross-browser, and accessible layouts according to Figma.
• Participate in task planning, solution discussions, and complexity estimation.

What we expect from you:

• 3+ years of commercial experience in frontend development.
• Strong understanding of JavaScript (ES6+) and TypeScript.
• Excellent knowledge of HTML5 and CSS3 (Flexbox, Grid, Custom Properties).
• Commercial experience with React (hooks, context, render optimization).
• Experience working with SCSS (and CSS Modules) with an understanding of style structuring.
• Understanding and experience with the BEM methodology.
• Semantic, accessible (a11y), and cross-browser layout development.
• Experience with build tools (Webpack, Vite).
• Proficient in Git (Pull Request Flow, Code Review).
• Experience integrating with REST API and GraphQL.
• Experience with react-query.

We are seeking a Senior Full Stack Engineer to join our team as a developer for our creator messaging capabilities. Messaging includes email, MMS, social media DMs, and ‘channel-based’ messaging (like Slack, Discord, or LINE).

The ideal candidate has extensive experience developing:

• Deliverability and sending infrastructure (ideally, with AWS SES)
• Google Workspace or Outlook365 integration experience
• DNS setup technology, especially related to custom domain enablement and email authentication
• Template customization tools (WYSIWYG), deep understanding of email HTML a plus
• Message automation, sequencing, and recipient list management features
• SMS/MMS text messaging integrations
• Direct messaging (ideally, Meta DMs) integration

In this role, you will work on our software platform’s messaging features, building out key features and strengthening our core platform. You will also utilize AI tools to improve efficiency and ensure our platform stays at the cutting edge of technology and innovation in the influencer marketing space.

In this role, you’ll get to:

• Lead the development and maintenance of front-end components for the Payments team using React, Angular, and other JavaScript frameworks.
• Design, develop, and deploy full stack solutions with a focus on high availability, performance, and scalability.
• Implement and maintain components within a design system to ensure consistency and reusability across the platform.
• Optimize web applications for maximum speed, accessibility, and scalability.
• Ensure the technical feasibility of UI/UX designs. Being comfortable implementing MVPs without high-fidelity designs using existing components is a plus.
• Collaborate with a Senior/Staff Backend Developer to ensure seamless integration between front-end and back-end systems and assist in the development of backend services using PHP, TypeScript, GraphQL, and AWS as needed.
• Collaborate with project managers, product managers, and other team members to deliver high-quality software solutions.

Who you are and what you’ll need for this position:

• Bachelor's degree in Computer Science, Engineering, or a related field, or equivalent experience.
• 5-7+ years of experience in full stack development, with a strong focus on front-end technologies.
• Proficiency in React and Angular, with the ability to work with other JavaScript frameworks.
• Familiarity with backend frameworks and technologies such as PHP, TypeScript, GraphQL, and AWS.
• Experience implementing and maintaining components within a design system.
• Strong understanding of web development best practices, including performance optimization, accessibility, and responsive design.
• Excellent problem-solving skills, attention to detail, and ability to work independently and collaboratively.
• Strong communication skills for effective cross-functional collaboration.

Nice to Have:

• 2+ years of experience developing messaging applications (especially email).
• Experience with CI/CD practices.
• Knowledge of security best practices for web development.
• Experience working with large data sets and performance tuning.
• Experience or interest in using AI tools to speed up the development process.

We are looking for a Senior Front-End Engineer (Next.js) to join our team.
Working Hours: Minimum 4-hour overlap with US Central Time (CT)

Requirements:

• Five-year working experience building front-end applications at scale
• Expertise in Next.js and React
• Excellent knowledge of HTML, CSS, JavaScript, TypeScript
• Strong command of state management, performance optimization, and design systems
• Proficient in turning designs into polished UIs using Figma
• Skilled at integrating with RESTful APIs, managing auth flows (OAuth, SSO), and contributing to API design discussions
• Familiar with CI/CD pipelines and modern testing frameworks
• Experienced working in cross-functional teams, collaborating closely with design, product, and backend engineering
• Opinionated about front-end architecture with the ability to clearly justify technical decisions
• Knowledge of other modern web standards, security practices, front-end performance patterns, scalability, and accessibility practices
• Bachelor’s or Master’s degree in computer science (or similar technical field)
• Level of English: Upper-Intermediate (at least)

Responsibilities:

• Collect, analyze, and document technical requirements for software development
• Develop well-designed, easy maintainable, scalable, and reusable software
• Collaborate with product managers, designers, and backend engineers to deliver elegant user experiences
• Contribute to and help lead front-end architectural decisions, tooling, and best practices
• Ensure consistent quality through code reviews, testing, and documentation
• Accurately scope and estimate work during sprint planning, and deliver on time
• Research, study, and develop new or complex technical solutions/technologies (e.g. R&D). Bring fresh ideas that can benefit the project and the company
• Mentor and train junior and intermediate developers

We are looking for a Software Engineer to join a HubSpot engineering team working on the development of the Marketing Events functionality within the HubSpot ecosystem. Our mission is to help marketers track the success of their events and improve lead engagement by collecting, processing, and storing data about events and attendees.
You’ll be involved in creating new features, maintaining and improving existing ones, and solving real user issues. Our team also owns and supports integrations with third-party platforms like Eventbrite and GoToWebinar, enabling seamless synchronization of event data with HubSpot. Right now, we’re also focused on redesigning the Marketing Events page and migrating to HubSpot’s new UI library, replacing outdated components with modern and consistent UI elements.
HubSpot has a great engineering culture, carried by great teams in the USA, Ireland, Germany, Ukraine, and Armenia. The platform consists of thousands of microservices built with Java 21, lightweight DropWizard framework, and Google Guice dependency injection. It’s huge and you’ll have to deal with a lot of other stuff like Apache Kafka, Amazon SQS, S3, MySQL, HBase, and much more. The front end consists of single-page applications built with ECMAScript 6, TypeScript, React, Redux, and Sass. The Platform Team has built state-of-the-art infrastructure that allows developers to deploy their code to QA and Production environments with just a few button clicks. This enables you to focus entirely on designing and developing software – there is nothing easier than triggering a build and merge here.
HubSpot has a great onboarding course where you will get in touch with HubSpot’s infrastructure and then with our integration. During this period you will be actively involved in our working process with onboarding buddy. When your trial is finished you are going to be involved as DRI (Directly Responsible Individual) on new features and in PagerDuty rotation.

Responsibilities

• Communicate directly with product management and peers in Boston and Dublin, other HubSpot development teams to shape out requirements
• Work on the front end using React, ECMAScript 6, and Sass, contributing to single-page applications and UI improvements using HubSpot’s new UI library
• Create new and extend existing microservices using Java 21, DropWizard, and whatever technology/tools required to complete a particular task
• Cover your code with all kinds of automation tests (unit, integration, acceptance, API, end-to-end)
• Fully own the software you’ve developed: design, develop, test, release, and support in both stage and production environments

Personal Profile Overview

• Degree in Computer Science, Software Engineering or related field
• Stability in previous employment history with a tendency to remain with employers for extended periods
• Experience in managing diverse project activities (not just coding, but also requirements analysis, preparing estimations)
• Clear and effective communication skills, both verbal and written, ability to convey ideas, information, and messages accurately and efficiently
• Proficiency in fostering effective collaboration and teamwork activities
• Ability to analyze information, assess situations, and make decisions based on sound reasoning and logical evaluation
• Focus on delivering exceptional customer experiences and prioritizing customer satisfaction
• Analytical thinking, problem-solving abilities, and strategic approach to technical challenges
• Transparency in sharing the information within a team and company
• Willingness to acquire new knowledge and insights to enhance professional growth and performance

Required Skills

• 3+ years working with Java and JavaScript
• Front-end development experience (React or other modern JS frameworks)
• Excellent understanding of the OO design/programming paradigm
• Solid background in computer science and programming
• Strong knowledge of databases and networks (HTTP/REST)
• Good understanding of unit testing/test automation
• Experience or strong knowledge in microservice architecture and message broker systems such as Kafka, Amazon SQS, etc.
• English Upper-Intermediate (B2)

As a Plus

• Strong learning and development abilities
• Ability to work from the office in Lviv