Jobs JavaScript / Front-End

Job Description

5+ years of experience in front-end development.
At least 3 years of experience with React + TypeScript.
Experience building complex SPA applications using React.
Experience with RESTful APIs, component-driven development, and frontend architectural patterns (e.g., atomic design).
Experience building automation-friendly SPA applications.
Experience with cross-browser compatibility and WCAG accessibility implementation.
Experience with NextJs, Syncfusion UI and Tailwind CSS would be a plus.
Excellent problem-solving skills and ability to work in a fast-paced, agile environment.
Experience working with Azure DevOps for task tracking and code repository would be a plus.
Experience working with AI-based productivity tools would be a plus.
Experience with CI/CD pipelines, unit testing, and deployment automation tools would be a plus.

Job Responsibilities

• Perform as part of a team in designing, developing, and deploying high-quality applications using C#, React, and .NET Core working on one of the workstreams on the project in Healthcare domain.
• Take ownership of the front-end technical solutions for the project.
• Support development team in matters related to React and CSS.
• Conduct code reviews and support junior team members to ensure technical excellence and professional growth.

• Troubleshoot complex technical issues and optimize performance of applications.

   

Department/Project Description

Client is a leading global Contract Research Organization (CRO) that provides Phase I-IV clinical trial management, market access, and technology solutions with over 30 years of experience.

About Us At Huuray, we make gifting smarter — helping companies and individuals send digital gift cards and rewards across the world. We're growing fast and looking for an experienced Frontend Developer to join our team and help us craft beautiful, scalable, and high-performance user interfaces across our platforms. We have talented team members based in Kyiv, and we're excited to add another skilled developer to collaborate closely with them.
 

What You'll Do

• Develop and maintain responsive, high-quality web applications for our gift and reward platforms.
• Work closely with our design team and backend developers to build seamless, user-focused solutions.
• Collaborate with product managers to create exceptional user experiences.
• Implement reusable, testable components with modern frontend frameworks and libraries.
• Perform cross-browser and cross-device testing to ensure consistency and reliability.
• Help perform QA testing of final product releases to maintain quality and stability.
• Optimize performance and ensure accessibility compliance.
• Participate in code reviews and help define best practices and UI standards.
• Use Claude Design (claude.ai/design) to rapidly prototype UI concepts, wireframes, and feature flows — turning ideas into shareable visuals before they reach development.
• Take ownership of integrating Claude Design into Huuray's frontend workflow, including connecting it with our design system and handoff pipeline to Claude Code.
   

Your Tech Toolbox

• Next.js/Vue
• JavaScript (ES6+)
• HTML5 & CSS3
• jQuery / jQuery UI
• Version control (Git)
• Frontend frameworks/libraries
• Cross-browser and cross-device testing tools
• Claude Design (claude.ai/design)
• Claude API / Anthropic SDK
   

What We're Looking For

• 3+ years of experience as a Frontend Developer.
• Fluent written and spoken English.
• Solid understanding of JavaScript and modern frameworks (React, Next.js, Vue).
• Strong experience with responsive design and modern web standards (HTML5, CSS3, JS).
• Hands-on experience with Claude Design — you've used it to create prototypes, mockups, or UI flows and understand how it fits into a modern frontend workflow.
• Knowledge of performance optimization and accessibility best practices.
• Comfortable working with APIs and integrating data from backend systems.
• Proficient in Git-based workflows (branches, pull requests, code reviews).
• Passion for clean, maintainable code and user-friendly design.
• 
   

Nice to Have

• Knowledge of Bootstrap and familiarity with .NET environments.
• Experience with TypeScript, GraphQL, or headless CMSs.
   

Why Join Us

• Work remotely with flexibility, preferably based around Kyiv.
• Join a company that already has team members in Kyiv, making collaboration seamless.
• Be part of a dynamic, fast-growing international company.
• Help build a product that brings joy to people around the world.
• Play a hands-on role in how we adopt AI tooling — Claude Design is going into our stack, and you'll help shape how we use it.
• Competitive compensation and a collaborative, idea-driven environment.

About the Role

We're looking for a Middle Front-end Developer who loves bringing designs to life and takes pride in delivering polished, well-built products. You'll own the full development cycle – from the first line of code to final deployment – and work closely with designers and project managers to make great things happen.
 

What You'll Be Doing

• Build websites from design to finished product, covering everything from design implementation to final deployment
• Set up and manage shared technical processes across projects – repository structure, dev environments, deployment pipelines, and more
• Ensure the quality, performance, and security of everything you ship
• Write and maintain up-to-date technical documentation
• Take part in project planning, requirements gathering, and task estimation
• Collaborate closely with designers and project managers to get the best results
• Test and debug products before client handoff
• Contribute to the growth of the company: help evaluate technical candidates, suggest improvements to internal processes, share knowledge with the team, and join internal meetings and initiatives

What We're Looking For

• Strong hands-on experience with WordPress and React-based frameworks
• Experience with Claude Code + Figma MCP – or a genuine eagerness to learn it
• Great communication and interpersonal skills
• Confidence in presenting and defending your technical decisions to clients

Nice to Have

• Experience with Webflow and/or Framer.

How We Work

• Fully remote, Monday to Friday – with an office in central Kyiv available whenever you need it
• Working hours: 10:00–19:00, Mon–Fri (with up to ±1 hour flexibility, agreed with your manager)
• Lunch break: 13:00–14:00, or whenever works best for you
• Employment via gig contract

Time Off

• Up to 17 paid working days of vacation per year
• Up to 10 working days can be taken in a single stretch
• Vacation days accrue monthly

About Us

League Dev is a web development studio – a subsidiary of League Design Agency – delivering digital products for clients across the US, UK, and EU.
At League Dev, we believe great products come from curious people who take initiative and care about their craft – and we're always looking for people who feel the same way.

Hello.

We are looking for a Front-End Team Lead to join Ohayu (https://ohayu.com). We are building the easiest way for travelers to stay online anywhere in the world. We’re a fast-scaling B2C mobile + web app (iOS/Android/Web) that lets people buy eSIM data plans in minutes - cheaper than roaming, no SIM shops, no hassle. Thousands of travelers already use Ohayu worldwide, and we’re just getting started.
Our ambition is bigger than eSIM: we’re evolving Ohayu into a full Travel App that makes every journey smoother.

What you’ll do:

This role is for someone who wants real ownership and real product impact.

• Take full ownership of the frontend architecture and scalability, designing a target architecture to migrate our Preact SPA to Next.js SSR
• Optimize website performance ensuring the fastest load times for users around the world
• Design and implement a robust caching strategy to support global performance at scale
• Add multiple languages to our platform
• Collaborate closely with the design team to translate Figma designs into high-quality, responsive user interfaces and A/B tests
• Improve observability and error handling across the frontend stack
• Refine and implement proper CI/CD pipelines to streamline our development and deployment workflow
• Mentor, support and lead other frontend developers, conducting code reviews and sharing knowledge

What we’re looking for:

• 7+ years of JavaScript experience
• 4+ years of React experience
• 4+ years of Next.js experience (ideally with hands-on work with App Router or Pages Router)
• 3+ years of TypeScript experience
• Proven experience with migration projects - ideally having led or played a key role in SPA to SSR migrations
• Experience deploying and managing applications on Vercel
• Solid knowledge of crash analysis tools and production monitoring
• Experience designing and implementing caching strategies for high-traffic, globally distributed applications
• Familiarity with i18n solutions and adding multi-language support to web platforms
• Experience building and maintaining CI/CD pipelines
• Leadership, mentoring and knowledge-sharing skills; you'll be guiding two mid+ React developers that have some experience with Next.js (13/14)
• At least intermediate English level — all work communication is in English

Why to join us:

• Direct product impact: what you ship gets used immediately by real travelers.
• Ownership: you’re a builder leading the frontend direction.
• Product engineering culture: we care about UX and conversion as much as we care about clean code.
• Fast pace, real learning: constant iterations, clear feedback loops, real-world constraints.
• Genesis ecosystem: access to strong expertise, resources, and networking.
• Benefits: health insurance, 20 paid vacation days, annual performance review with clear salary progression.

Work format: Possibility to work fully remotely or from our offices in Warsaw, Kyiv or Lviv.

Join us in reshaping the future of connectivity.

VANTREXIS is an engineering agency that builds dedicated remote teams for high-growth SaaS companies in the US, UK, and EU. We are looking for a Senior Frontend Engineer to lead development and architectural migrations in a complex, real-time product environment. 

The Role

You will join a team where AI-augmented development (Cursor, Claude, Copilot) is a daily standard, not a bonus. Your focus will be on delivering high-quality, typed code and driving the transition from legacy patterns to a modern, scalable frontend architecture.

Tech Stack

• Core: Vue 3 (Composition API) & Nuxt 4.
• State: Pinia.
• Logic: TypeScript, vee-validate 4.
• Mobile: Ionic, Capacitor (iOS/Android)
• Real-time: Firebase Realtime Database.
• Styling: Tailwind CSS / Bulma + SCSS.

• Media/Charts: Amazon IVS, Chime SDK, Chart.js.

   

   

Requirements

• Expert-level Vue 3: Deep knowledge of both Options and Composition API.
• Nuxt Ecosystem: Proven experience with Nuxt 3/4, SSR, and Nitro.
• Real-time Experience: Hands-on experience with Firebase, WebSockets, or live-streaming SDKs.
• Clean Code: Strong focus on TypeScript, modularity, and maintainable architecture.
• AI-Tooling: Proficiency in using AI-powered development tools to maximize efficiency.

• Self-Management: Ability to navigate complex codebases and take ownership of technical decisions.

   

   

What We Offer

• Remote-first: Work from any safe location in Ukraine.
• Stability: VANTREXIS is an official Diia City resident.
• Paid Time Off: Fully paid vacation days and sick leave policy.
• Health: Corporate medical insurance and mental health support.
• Learning: Unlimited access to Udemy and internal knowledge sharing.

• Culture: A small, agile team with a flat structure and zero unnecessary bureaucracy.

   

   

Hiring Process

1. HR Screen: Intro call to discuss your experience, expectations, and salary range.
2. Technical Interview: Deep dive into your engineering skills and architectural thinking.
3. Final Decision.