Jobs JavaScript / Front-End

This vacancy requires office attendance in Kyiv

Responsibilities

• Development and support of SPA on ReactJS: web version mobile-first of a high-load application, admin panels for internal use, and marketing pages
• Collaborate with other teams to effectively meet the product and technical needs of the project
• Proactively participate in improvements and existing solutions tuning
• Share expertise and knowledge with your teammates

Requirements

• At least 5 years of commercial experience in development in JS (ES6+)/Typescript
• Strong knowledge of CSS, HTML5, SASS, Jest
• At least 2 years of commercial experience in development in with ReactJS version 16+ (hooks)
• Experience with state management frameworks: Redux and Redux toolkit preferred
• Intermediate English

What we offer:

• International company with several offices in different locations : Tel-Aviv, Kyiv, Warsaw, Limassol.
• Granting an Option;
• A professional environment with great people to work with;
• Competitive salary, performance review;
• Flexible working hours, no one here tracks your work time because our culture is built on trust and cooperation;
• Social package, including sports coverage, elite medical insurance for you and family;
• 20 working days paid vacation and 100% sick leaves coverage;
• Opportunities to make a difference, to develop and grow;
• Regular corporate celebrations, team buildings and fun activities;
• Comfortable office close to the metro station. Our Kyiv office is open 24/7 with all safety and health measures in place.

24PLAY is a product company from Ukraine that has been developing and publishing mobile games since 2019. We are a team of professionals who have launched dozens of popular games and gained over 100 million satisfied players worldwide. Our games include Zombiepunk, Bliezkrieg Assault, Street Dude, and more.

We are currently looking for a Playable Ads Developer to share our core company values:

• Creativity: We actively encourage and embrace each other’s ideas, transforming them into reality through collaboration and innovative thinking.
• Integrity: We commit to providing honest feedback and realistically assessing situations, fostering a culture of trust and transparency.
• Productivity: We strive to optimize our workflows to achieve the best possible results in the shortest timeframe, ensuring efficiency and effectiveness in our operations.
• Uncompromising Quality: Our commitment to excellence drives us to prioritize the quality of our work above all else, ensuring that we consistently deliver outstanding results.
• Healthy Lifestyle: We advocate for a healthy lifestyle and stand against harmful habits, promoting well-being and balance within our team.

We are looking for a professional for the role that requires:

• Full-time job;
• Office-based in Kyiv.

Main responsibilities:

• Create 2D and 3D playable ads and creatives to promote mobile games
• Develop gameplay mechanics, game logic, animations, and visual effects

Our ideal candidate:

• 0,5+ years of experience working with JavaScript
• Experience building web applications or games using 3D graphics libraries (Three.js, Babylon.js, etc.) or experience with 2D JavaScript libraries such as PixiJS or similar
• Experience with JavaScript physics libraries (Ammo.js, Cannon.js, or similar)
• Solid understanding of 2D/3D math (vectors, matrices, dot/cross product)

Nice to have:

• Experience working with MRAID and understanding of ad network technical requirements for playables
• Experience creating games on any technology/platform (Unity, Flash, etc.)

Why join our team?

• Fully Legal: Official employment in full compliance with Ukrainian labor legislation, including paid vacation (24 days) and sick leave (unlimited).
• Professional Team: A high-performing group of skilled individuals committed to excellence.
• No Overtime: We prioritize a healthy work-life balance, with no overtime required.
• Stable Payments: No payment delays since the foundation of the company.
• Bonus System: A unique reward system designed to motivate employees by aligning their performance with the company’s financial goals.
• Professional Development: Access to mentorship programs and our internal library for continuous growth.
• Events: Enjoy board games, masterclasses, corporate events, sports activities, and free English classes.
• Comfortable Workspace: A modern office in Kyiv featuring a spacious lounge, fully-equipped kitchen, sports zone, cinema, and complimentary spa facilities for employees.
• 35-Hour Work Week: Reduced working hours as a benefit for experienced employees.

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.
• 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.

Senior Angular (v18+) and TypeScript Developer needed. Join the team for a UK-based healthcare company that enables remote patient monitoring, clinical research, and personalized healthcare.

What You’ll Do:

• Design and develop front-end features using Angular and TypeScript
• Contribute to front-end architecture decisions, ensuring scalability, performance, maintainability, and long-term code quality
• Work closely with UX/UI designers, product owners, backend engineers, and other stakeholders to shape product solutions
• Review code, provide technical guidance, and support other engineers in improving solution quality
• Identify technical risks, propose improvements, and help reduce technical debt
• Contribute to frontend standards, reusable components, and engineering documentation

What We’re Looking For:

• 5+ years of experience in frontend development, with strong hands-on expertise in Angular and TypeScript
• Deep knowledge of Angular v18+ and modern Angular patterns
• Strong experience with RxJS and reactive programming patterns
• Solid understanding of scalable frontend architecture, modularization, reusable components, and maintainable code structure
• Experience with Angular Material, SCSS/CSS3, responsive design, and cross-browser compatibility
• Strong knowledge of RESTful APIs, HTTP, authentication flows, and web application security principles
• Experience with unit and integration testing using tools such as Karma, Jasmine, Jest, or similar frameworks
• Strong Git experience and confidence working in collaborative development workflows
• Ability to mentor other developers, provide thoughtful code reviews, and raise engineering quality across the team

Nice to Have:
• Experience with performance optimization tools and techniques such as Lighthouse, lazy loading, bundle optimization, and runtime performance profiling
• Familiarity with CI/CD pipelines and deployment automation
• Exposure to backend development or full-stack experience
• Knowledge of accessibility standards (WCAG) and testing frameworks like karma

• Experience working with design systems or shared component libraries

This role is for a developer who has already automated and optimized processes using AI and understands how to apply it in real-world work.
 

The key focus is building AI solutions based on Claude: automations, integrations, and AI agents for different business use cases.

Responsibilities:

•  Develop and maintain backend logic (Python or JavaScript)
•  Build API integrations (CRM systems, external services, etc.)
•  Create automation workflows (e.g., using n8n or similar tools)
•  Build AI agents based on Claude for different business tasks
•  Work closely with department heads to understand their workflows and operational processes
•  Translate business processes into technical automations aimed at reducing manual work and dependency on human resources
•  Design and develop AI infrastructure (integrations, services, system logic)

Requirements:

•  2+ years of software development experience
•  Strong proficiency in Python or JavaScript
•  Mandatory experience in AI-powered process automation
•  Mandatory hands-on experience with Claude
•  Experience building AI agents (based on Claude) for different use cases
•  Understanding of system architecture, API integrations, and technical infrastructure (REST APIs, webhooks, etc.)
•  Ability to independently read documentation and implement solutions
• English: intermediate level (B1), sufficient for reading technical documentation

What we offer:

• Direct work with C-level leadership
• Direct impact on business: process optimization and real contribution to efficiency growth
• Bonus system tied to revenue growth and automation performance results
• Minimal bureaucracy — maximum autonomy and freedom in execution
• Opportunity to complete Claude certification within the company
• High income with growth potential as business impact increases

To be considered for this role, we require you to submit a Loom (or equivalent) recording application explaining your background and approach to development as it pertains to the application below 

We're a growth agency working exclusively with subscription CPG brands on Shopify. We're hiring a developer who is equally obsessed with Shopify and AI-assisted development. Not a Shopify dev who tolerates AI. Not an AI tinkerer who happens to know Liquid. Both, in equal measure.

You should be the person who reads Shopify changelogs the day they drop, knows why metaobjects changed how theme architecture works, and has opinions about JSON templates vs. sections-everywhere. You should also be the person who has built their own agents, refined their own prompt libraries, and can show how AI has compounded your output month over month.

What you'll do:

• Build and maintain custom Shopify themes for subscription CPG brands
• Deliver sections, components, and full theme builds on aggressive timelines
• Wire up Klaviyo, Skio, Recharge, and Intelligems inside theme code
• Contribute to our internal boilerplate (Skeleton base, Alpine.js, BEM, no build step)
• Own QA via Loom walkthroughs and clean handoffs

The Shopify obsession looks like:

• Deep fluency in Liquid, JSON templates, sections, blocks, and metaobjects
• Strong Alpine.js or vanilla JS, comfortable without a build step
• Hands-on experience with Skio or Recharge selling plans, line item properties, cart and storefront APIs
• Opinions on theme architecture, performance budgets, and merchant-friendly schema design

The AI obsession looks like:

• Claude Code, Cursor, or equivalent is your primary dev surface, not autocomplete
• You write specs and let agents draft code, then review, tighten, and ship
• You've built your own prompt libraries, slash commands, sub-agents, or MCP integrations for repetitive Shopify work (section scaffolding, schema generation, Liquid + Alpine glue, theme migrations)
• You can show, with receipts, how AI has multiplied your throughput in the last six months
• If your first instinct on a new section is "I'll just write it by hand," this isn't the role

Nice to have:

• Klaviyo template work, Intelligems test setup, Cloudflare Workers, contributions to internal tooling or agents

E-Memory is a Legacy Tech startup on a mission to preserve the digital soul. We transform fragmented social media archives into permanent, AI-narrated family legacies. The backend is ready; the data is waiting. We now need a Frontend Architect to build the window into these memories.

The Focus: Velocity & Impact
 

We are in a "Zero-to-One" phase. We need someone who finds joy in building things from the ground up and understands that perfection is the enemy of the shipped.

• Rapid Prototyping: The ability to translate a vision into a functional, high-fidelity Next.js interface quickly.
• Pragmatic Excellence: Knowing where to use robust libraries to accelerate development and where to write custom code for core performance.
• Autonomy: You will own the frontend roadmap. We value engineers who bring solutions, not just code.
   

Technical Requirements
 

• Next.js Mastery: Deep expertise in App Router, Server Components, and advanced caching.
• Performance-First Mindset: Experience handling media-heavy applications (optimizing large image/video galleries for mobile).
• Refined UI/UX: A strong eye for detail using Tailwind CSS and Framer Motion. The interface must feel "living" and respectful.
• PWA Expertise: Ensuring "Phygital Portals" (QR-triggered) load instantly, even in low-connectivity areas.
   

 What We Value
 

We are a small, dedicated team. You will be a great fit if:

• You prefer delivering value over over-engineering complex abstractions.
• You are comfortable with ambiguity and can pivot based on user feedback.
• You enjoy collaborating directly with founders to shape the product's soul.
• You have 5+ years of experience, ideally having seen a product go from 0 to users.
   

How to Apply
 

We value your time and keep our process lean. Please email hi@e-memory.io with:
 

1. A Portfolio/GitHub Link: Highlighting a project you are proud of (specifically focusing on UI or speed).
2. The Engineering Perspective: In an MVP stage, how do you balance the need for a "perfect" architecture with the need to ship features to users next week?

Location: Warsaw!
Start: as soon as possible
Duration: long-term
Languages: Polish is mandatory !!, English: B2

Hybrid: 1-2x week in Warsaw | 4+ years React exp | English B2+
 

• Core Stack: Expert-level React 19+ (Hooks, Suspense, RSC) and TypeScript (Strict Mode, Utility Types, Generics).
• Architecture: Next.js (Web) and Turborepo/Nx for unified monorepo management across platforms.
• State & Forms: XState/TanStack Query (no Redux), Zod, React Hook Form, and nuqs for type-safe params.
• Styling & UI: Tailwind CSS v4+ and NativeWind for cross-platform component consistency.
• Performance Engineering: Expert profiling of Core Web Vitals (LCP, INP, CLS) and React Native bridge/memory optimization.
• Quality Assurance: Vitest, React Testing Library, and Playwright with a focus on 80%+ critical path coverage.
• BFF & API: Next.js API routes and oRPC for end-to-end type safety.
• AI & Security: Designing agentic workflows for dev-velocity; expert OWASP Top 10 mitigation and dependency auditing.

!!!! PART- TIME POSITION

About the Company

We are a fast-growing technology company creating innovative mobile solutions. Our team of professionals is dedicated to developing high-quality products that transform the lives of millions of users.

Responsibilities

• Develop high-performance cross-platform mobile applications using React Native
• Design and implement new features and components
• Optimize performance of existing applications
• Write clean, maintainable, and testable code
• Participate in code reviews and technical discussions
• Mentor junior developers
• Collaborate with design, backend, and QA teams

Requirements

• 4+ years of experience with React Native development
• Strong understanding of React and React Native frameworks
• Proficient in JavaScript/TypeScript
• Experience with state management solutions (Redux, MobX, Context API)
• Knowledge of native mobile development (iOS/Android)
• Understanding of RESTful APIs and data fetching concepts
• Experience with version control systems (Git)
• Solid problem-solving skills and attention to detail
• Excellent communication and teamwork abilities

Nice to Have

• Experience with CI/CD pipelines
• Knowledge of testing frameworks (Jest, Detox)
• Familiarity with Agile methodologies
• Experience with performance optimization techniques
• Published applications in App Store/Google Play
• Open-source contributions

We Offer

!!!! PART- TIME POSITION

• Competitive salary and benefits package
• Remote-friendly work environment
• Professional growth opportunities
• Work on challenging projects with global impact
• Collaborative and innovative team culture
• Regular team-building activities
• Continuous learning and development support

• 1+ years of experience in development
• Strong knowledge of Javascript and TypeScript
• Strong knowledge of Angular
• Strong analytical and problem-solving skills
• Experience working with RxJS ,NgRx ,signals, and new angular syntax template
• Confident AI prompting, understanding of LLM principles (Context window, RAG, System prompts)
• Experience working with AI coding assistants (Cursor, Claude Code, GitHub Copilot)
• Good understanding of asynchronous and reactive programming
• Confident working with the Git version control system
• Understanding of GraphQL

• Intermediate level of English

   

Would be a plus:

• Experience working with React
• Experience working with Websockets

• Experience building large-scale SaaS platforms supporting millions of users.

   

Responsibilities:

• Build features and systems with attention to detail and performance.
• Own end-to-end development, from conception to production.
• Engineer not only solutions but also tools to understand the problem.
• Work closely with cross-functional stakeholders to deliver a world-class product.

• Identify and implement improvements to our existing systems.

   

About the project:

Project management platform. With the help of own API, it’s possible to do multiple integrations with communication, sales, analytics and other applications that are used by co-workers on a daily basis.

We are looking for a frontend engineer to improve the beautifully crafted product that helps millions of people to enjoy their remote work! You will be responsible to deliver production-ready functionality in a cross-functional team and will be able to reach millions of people with your best effort and working time as part of a multinational team of highly skilled developers.

• Project Description:

  We are seeking a skilled Regular - Senior Web Graphics Developer to join our team in the oil and gas industry. The ideal candidate will have extensive experience in developing advanced web-based visualizations and a deep understanding of industry standards. This role requires proficiency in HTML5 Canvas, Angular, RxJS, Angular Signals and NgRx along with a strong grasp of the graphics rendering pipeline. Additionally, the candidate should possess general cloud development skills and backend expertise, including microservices architecture and experience with AWS and Azure.

   

• Responsibilities:

  • Design, develop, and maintain interactive web-based visualization tools for oil and gas data.
  • Implement advanced graphics rendering techniques using HTML5 Canvas
  • Collaborate with geologists, engineers, and other stakeholders to understand visualization requirements and deliver effective solutions.
  • Ensure visualizations are optimized for performance and scalability.
  • Stay up-to-date with industry standards and best practices in web visualization and graphics rendering.
  • Integrate visualization tools with existing data management systems and workflows.
  • Develop and maintain backend services using microservices architecture.
  • Utilize cloud platforms such as AWS and Azure for deployment and management of visualization tools.
  • Provide technical guidance and mentorship to junior developers.

   

• Mandatory Skills Description:

  • 4+ years in Graphics development, with a strong emphasis on web-based Visualization applications and tools.
  • Proven experience in web-based visualization development, particularly in the oil and gas industry.
  • Strong proficiency in Angular 16+, RxJs, Angular Signals, NgRx
  • Strong proficiency in HTML5 Canvas
  • In-depth knowledge of the graphics rendering pipeline.
  • Excellent problem-solving skills and attention to detail.
  • Strong communication and collaboration skills.
  • Ability to work independently and as part of a team.

Project description

We are seeking a skilled Regular - Senior Web Graphics Developer to join our team in the oil and gas industry. The ideal candidate will have extensive experience in developing advanced web-based visualizations and a deep understanding of industry standards. This role requires proficiency in HTML5 Canvas, Angular, RxJS, Angular Signals and NgRx along with a strong grasp of the graphics rendering pipeline. Additionally, the candidate should possess general cloud development skills and backend expertise, including microservices architecture and experience with AWS and Azure.

Responsibilities

Design, develop, and maintain interactive web-based visualization tools for oil and gas data.

Implement advanced graphics rendering techniques using HTML5 Canvas

Collaborate with geologists, engineers, and other stakeholders to understand visualization requirements and deliver effective solutions.

Ensure visualizations are optimized for performance and scalability.

Stay up-to-date with industry standards and best practices in web visualization and graphics rendering.

Integrate visualization tools with existing data management systems and workflows.

Develop and maintain backend services using microservices architecture.

Utilize cloud platforms such as AWS and Azure for deployment and management of visualization tools.

Provide technical guidance and mentorship to junior developers.

Skills

Must have

4+ years in Graphics development, with a strong emphasis on web-based Visualization applications and tools.

Proven experience in web-based visualization development, particularly in the oil and gas industry.

Strong proficiency in Angular 16+, RxJs, Angular Signals, NgRx

Strong proficiency in HTML5 Canvas

In-depth knowledge of the graphics rendering pipeline.

Proficiency in cloud platforms such as AWS and Azure.

Excellent problem-solving skills and attention to detail.

Strong communication and collaboration skills.

Ability to work independently and as part of a team.

Nice to have

Bachelor's or Master's degree in Computer Science, Engineering, or a related field.

Spatial geometry thinking, basic math

Familiarity with Three.JS, Pixi.JS or WebGL is a plus.

Experience with backend development and microservices architecture.

Languages

English: B2 Upper Intermediate

Web Flutter Developer (Remote)

We are looking for a Web (Flutter) Developer to join the company's digital team and help support and evolve web platforms. 

What you’ll do:

• Build and maintain Flutter Web applications
• Work with Dart, async programming, and RESTful APIs / JSON
• Implement the BLoC pattern and follow MVVM / Clean Architecture principles
• Write clean, readable, and maintainable code
• Collaborate with the team and participate in code reviews

Requirements:

• Have at least 1 year of commercial experience with Flutter on web development. Experience with Dart.
• Understanding of asynchronous operations and HTTP requests
• Strong willingness to learn and grow professionally
• Team-oriented mindset
• It would be nice if you have a conversational English level, but it is not mandatory.

What company offers:

• Fully remote, work from anywhere
• Opportunity to grow into a Middle/Senior role
• Supportive team and mentorship

Who you are:

• Curious, proactive, and enjoy solving problems
• Detail-oriented and take pride in getting things right
• Communicate clearly and work well with different teams
• Motivated to build a strong foundation and grow as a web professional

Nice to have (but not required)

• Basic knowledge of PHP, HTML, CSS, JavaScript
• Exposure to CMS platforms, performance basics, or SEO fundamentals
• Interest in analytics and measurement tools (e.g. GA4)

Personal projects on Flutter (Web) to share (GitHub, portfolio, university projects).

On behalf of our Client from Spain, Mobilunity is looking for a Frontend Developer.

Our Client is building a new digital product focused on ticketing solutions for the entertainment industry. The platform enables users to easily discover, purchase, and manage tickets for various venues such as clubs, concerts, and other live events.

The product is designed to provide a seamless booking experience, allowing users to access events, manage reservations, and interact with venues in real time. At the same time, it empowers businesses to efficiently manage ticket sales, optimize attendance, and build direct relationships with their audience.

This is a greenfield project aimed at rebuilding the service from scratch using modern technologies and scalable architecture.

Their goal is to create a leading platform in the entertainment space, helping venues and event organizers deliver a smooth and engaging digital experience, while increasing customer loyalty and operational efficiency.

Requirements:

Frontend 

• Next.js (App Router) and React 19: Server Components, client components and server-side rendering patterns
• TypeScript 5.9+ in strict mode: advanced typing, generics, discriminated unions
• Zustand for global state management
• Tailwind CSS 4 with CSS variables: design token systems, themes and custom utilities
• At least 5 years of frontend development experience

Testing & Tooling

• Jest: unit testing and component integration testing
• Docker: containers for development and deployment environments
• Git: branch workflows, pull requests and code reviews

AI

• Regular use of coding agents: Claude Code
• AI-assisted code generation, testing and technical documentation
• Ability to review and validate AI-generated output

English: B2-C1

Requirements:

• 1+ years of experience in development
• Strong knowledge of Javascript and TypeScript
• Strong knowledge of Angular
• Strong analytical and problem-solving skills
• Experience working with RxJS ,NgRx ,signals, and new angular syntax template
• Confident AI prompting, understanding of LLM principles (Context window, RAG, System prompts)
• Experience working with AI coding assistants (Cursor, Claude Code, GitHub Copilot)
• Good understanding of asynchronous and reactive programming
• Confident working with the Git version control system
• Understanding of GraphQL
• Intermediate level of English

Would be a plus:

• Experience working with React
• Experience working with Websockets
• Experience building large-scale SaaS platforms supporting millions of users.

Responsibilities:

• Build features and systems with attention to detail and performance.
• Own end-to-end development, from conception to production.
• Engineer not only solutions but also tools to understand the problem.
• Work closely with cross-functional stakeholders to deliver a world-class product.
• Identify and implement improvements to our existing systems.

About the project:

Project management platform. With the help of own API, it’s possible to do multiple integrations with communication, sales, analytics and other applications that are used by co-workers on a daily basis.

We are looking for a frontend engineer to improve the beautifully crafted product that helps millions of people to enjoy their remote work! You will be responsible to deliver production-ready functionality in a cross-functional team and will be able to reach millions of people with your best effort and working time as part of a multinational team of highly skilled developers.