Jobs JavaScript / Front-End

Our partners are looking for a strong Senior Frontend Developer who can think beyond a single game, at the level of the entire product portfolio. Architectural decisions, reusable components, shared pipelines: what you build affects multiple projects at once.

🧩 What you’ll do
- Build and ship slot games end-to-end — from initial prototype to production release;
- Beyond game development, participate in shaping the frontend architecture and development standards across all projects — making technical decisions, reviewing code, and sharing expertise with the team;
- Collaborate with Producers, Artists, and Backend Engineers to ensure seamless integration and optimized performance;
- Contribute to code quality through reviews and shared standards, keeping our codebases scalable, maintainable, and reusable;
- Contribute to the design and implementation of new features, UI components, and in-game effects;
- Improve our core framework, build tools, and asset pipelines;
- Profile performance and debug across platforms (desktop, mobile, WebGL) to keep games running smoothly everywhere;
- Treat knowledge as a team asset — document your work and share what you learn with the team;
- Stay curious about modern frontend technologies and trends in the iGaming ecosystem.

💎 What you bring
- 4+ years of frontend development experience, including at least 2 years building HTML5 slot games — enough to have shipped multiple titles end-to-end and learned from real production cycles;
- Strong expertise with Pixi.js and modern JavaScript / TypeScript;
- Solid understanding of OOP, asynchronous programming, and rendering performance optimization;
- Strong knowledge of Spine animations and deep understanding of asset management pipelines;
- Experience with Vue 3 or other modern UI frameworks;
- Experience building or improving internal tools or frameworks for dev team;
- Fluency in English.

🧠 Nice to have
- Experience with game audio — Howler.js, Web Audio API, or similar;
- Experience with build automation, CI/CD pipelines, or process optimization tools;
- Familiarity with iGaming specifics: RNG logic, platform workflow, integrations.
- Experience with GLSL/WebGL shaders for custom visual effects;

3DFrames is a product company developing 3D solutions for B2B clients. Our projects include interactive visualizations, 3D configurators, STEM animations, and high-performance web applications.

We are looking for a Junior Three.js Developer to join our team and work on interactive 3D solutions for the web.

Format: Remote, full-time
Location: Ukraine / Europe
Company: 3DFrames
Company type: Product
Salary: up to $700 gross
English: sufficient for working with technical documentation

Core Requirements & Tech Stack

• Three.js, React, Redux, Redux-Saga, TypeScript
• 1+ years of relevant experience with Three.js, WebGL, or 3D graphics
• Basic understanding of 3D mathematics: vectors, matrices, and transformations
• Experience working with 3D models in GLTF / GLB / FBX / OBJ formats
• Understanding of Git and basic knowledge of GitHub / GitLab
• English sufficient for working with technical documentation

Responsibilities

• Develop 3D scenes, animations, and interactive elements using Three.js / WebGL
• Integrate 3D models into web projects, including preparation, optimization, and import of GLTF / FBX assets
• Work with textures, lighting, materials, and cameras
• Optimize 3D scenes for fast and efficient rendering in the browser
• Collaborate with developers, designers, 3D artists, and QA engineers
• Learn and apply new technologies and approaches in web-based 3D graphics

Will Be a Plus
 

• Tailwind CSS
• REST API
• Graph API
• Knowledge of 3D scene optimization
• Understanding of interactive 3D interfaces and UX in 3D

Team

You’ll be joining a team of 4 Developers, 1 Project Manager, and 2 QA Engineers.

What We Offer

• Full-time remote cooperation
• Cooperation via FOP
• Accounting support if needed
• 15 paid vacation days
• 5 paid sick days
• Paid public holidays
• Opportunity to grow within an experienced development team
• Hands-on experience with commercial web-based 3D products

Interview Process
 

HR Interview → Test Task → Technical Interview → Final Interview

Ready to join us? Apply now — your ideas and approach might be exactly the spark we’re looking for.

We are looking for a Senior Frontend Developer to join a long-term project focused on building and evolving a complex, data-intensive platform in the Construction Technology domain.

This role is centered around frontend architecture, high-load web applications, and real-time data visualization. You will be responsible for designing scalable frontend solutions, optimizing rendering performance, and ensuring smooth interaction with large volumes of live operational data.

The platform plays a key role in workforce tracking, operational efficiency, and automation of field processes. It processes large streams of real-time data and delivers advanced dashboards, analytics, and scheduling interfaces used in day-to-day operations.

This is a frontend-focused role with high ownership and significant impact on product architecture and user experience.

Benefits:

• Opportunity to work on complex high-load frontend architecture challenges
• Professional growth within a scaling international tech company
• High-impact role in a real-world IoT and data-driven product
• Remote-first environment with flexibility and autonomy
• Collaborative international engineering team

Requirements:

• 4+ years of commercial experience in Frontend Development
• Expert-level knowledge of Vue 3 (Composition API) and Nuxt 3
• Strong experience building and optimizing high-load web applications
• Deep understanding of state management solutions (Pinia or similar)
• Strong proficiency in TypeScript and modern JavaScript (ES6+)
• Experience with Server-Side Rendering (SSR) and frontend rendering optimization
• Expertise in browser performance profiling and optimization
• Experience working with large datasets, dashboards, tables, or real-time interfaces
• Experience with WebSockets or Server-Sent Events (SSE) for real-time data integration
• Strong understanding of responsive and accessible UI development
• Additional Requirements:
• Strong analytical and problem-solving skills
• Attention to UI/UX performance and scalability
• Ability to take ownership of large frontend features and architecture decisions
• Experience working in Agile/Scrum environments
• Excellent asynchronous communication skills

Responsibilities:

• Architect, build, and maintain scalable frontend solutions using Vue 3 and Nuxt 3
• Develop and optimize data-heavy UI components and real-time dashboards
• Implement advanced rendering strategies such as virtual scrolling, lazy loading, and pagination
• Collaborate closely with backend engineers to integrate complex APIs and real-time data streams
• Lead frontend performance optimization initiatives for high-load environments
• Maintain high standards of code quality through code reviews and testing
• Translate complex product requirements and UI/UX designs into performant interfaces
• Troubleshoot and resolve frontend architectural bottlenecks and performance issues
• Contribute to frontend architecture decisions and long-term technical strategy

About Client:

A construction workforce management platform that replaces manual time tracking with AI-powered biometric verification. It helps contractors capture accurate hours, reduce payroll errors, track crews and cost codes in real time, and sync clean labor data into systems like Procore, CMiC, Vista, and Power BI.

Location: United States

About project:

The platform's core processing system. Handles IoT data ingestion and advanced scheduling. Delivers real-time dashboards and mobile views with live labor analytics for construction managers.

RedCore is an international business group that creates technological solutions for digital markets. Our products and services cover fintech, marketing, e-commerce, customer service, communications, and regulatory technologies.

We are looking for a Senior Front-End Engineer (Pixi.js) to join our team! 

Requirements: 
- 5+ years in frontend engineering, 2+ years with 2D JavaScript Framework experience (Pixi.JS, Phaser, or similar)
- Expert in HTML5, CSS/SCSS, responsive layouts, and component-driven architecture.
- Familiar and can apply TDD/BDD like practices
- Performance optimization (change detection, lazy loading, bundle splitting)
- API integration: REST, WebSockets; robust error/edge-case handling.
- CI/CD familiarity; feature flags, environment config, release hygiene.
Security basics (OWASP for web), auth flows (OAuth/OIDC/JWT). 

Responsibilities: 
- Design, develop, and maintain scalable frontend services using modern web frameworks.
- Take part in technical discussions to come up with solutions for challenging issues;
- Optimize application performance, scalability, and security.
- Collaborate closely with product managers, designers, and other developers to deliver seamless user experiences.
- Write clean, maintainable, and well-documented code, following coding standards.

Our benefits to you:

☘️An exciting and challenging job in a fast-growing business group, the opportunity to be part of a multicultural team of top professionals in Development, Architecture, Management, Operations, Marketing, Legal, Finance, and more

🤝🏻Great working atmosphere with passionate experts and leaders, sharing a friendly culture and a success-driven mindset is guaranteed

🧑🏻‍💻Modern corporate equipment based on macOS or Windows and additional equipment are provided

🏖Paid vacations, sick leave, personal events days, days off

💵Referral program — enjoy cooperation with your colleagues and get the bonus

📚Educational programs: regular internal training sessions, compensation for external education, attendance of specialized global conferences

🎯Rewards program for mentoring and coaching colleagues

✈️In-house Travel Service

🦄Multiple internal activities: online platform for employees with quests, gamification, presents and news, clubs for movie / book / pets lovers and more

🎳Other benefits could be added based on your location. 

24PLAY is a game development company from Ukraine, creating games and playable ads in co-development and co-production with partners worldwide.
 

Since 2019, we’ve been bringing together strong production expertise, creative talent, and a deep understanding of games to turn ideas into engaging player experiences. Today, we collaborate with partners such as Ubisoft, Papaya, Octo Games, and others - developing and launching games and playable experiences for global audiences.

As a Diia City resident, we offer employee reservation starting from the first day of employment.
 

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
  
  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.)
  
  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)

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.

   

Are you passionate about E-commerce and Content Management? Nestlé Business Services Lviv team is looking for those who are ready to take on the challenge and become a part of our loyal & dynamic team. In this position, you will be able to apply your skills and knowledge in the international environment, cooperate with Nestlé colleagues across the globe and grow your career within the biggest company in the FMCG industry. We’re proud to be an active equal opportunity employer to enhance diversity & inclusion in our company.

You are:

- A digital enthusiast with hands-on experience with e-commerce platforms like Magento, Adobe Commerce, Shopify,

WooCommerce, etc. Knowledge of Hybris will be a plus

- Hands-on experience with CMS including Drupal

- A professional SEO familiarity;

- Knowledgeable in web analytics tools and other optimization tools (e.g. Google Analytics, Google Search Console, Google Tag Manager, SessionCam etc);

- Confident in English on Upper-Intermediate level (both written and verbal);

- A great communicator and a team player.

With you we will:

- Execute content, product, promotion management in Magento2;

- Perform Q&A activities upon introduction of any change on the digital landscape;

- Carry off End-to-end testing prior to release (NDG.COM and Mobile Apps);

- Implement SEO optimization;

- Configure and Q&A existing features on Magento2 platform;

- Track market requests and key activities delivered for the business, report on key activities delivered.

What’s in it for you: 

Remuneration package: annual salary review & bonus, 28 days of paid vacation, paid sick leaves, medical insurance, lunch allowance, IT Club discount program;

Official employment;

Personal & Professional development opportunities

International environment and diverse team;

About Nestlé

Nestlé Business Services Lviv (NBS Lviv) provides world class business services for Nestlé entities in more than 70 countries across the globe. We are experts in accounting, social media monitoring, user management support, payroll, procurement and personal data administration.

Our talented people have a possibility to gain global expertise, practice their language skills (our corporate language is English), obtain new knowledge every day through collaboration with our partners in different countries. They strive for continuous improvement and are eager to participate in challenging tasks.

Phoenix Games is a next-generation technology company building innovative iGaming and Web3 products for a global audience. We combine modern web technologies, blockchain infrastructure, AI-powered solutions, and digital assets to create engaging gaming experiences used by players worldwide.

We're growing our engineering team and are looking for a talented Senior React Developer who enjoys building scalable products, solving complex technical challenges, and working in a fast-moving international environment.

What You'll Do

• Develop modern, responsive web applications using React and TypeScript.
• Build reusable UI components and scalable front-end architecture.
• Collaborate closely with Product Managers, UI/UX Designers, and Backend Engineers.
• Integrate REST APIs and WebSocket services.
• Optimize application performance and improve user experience.
• Participate in code reviews and technical discussions.
• Contribute to architectural decisions and engineering best practices.
• Help shape the future of our gaming platform.

Tech Stack

• React 18+
• TypeScript
• Next.js
• Redux Toolkit / Zustand
• React Query / TanStack Query
• Tailwind CSS
• Vite
• WebSockets
• REST API
• Git
• Docker
• CI/CD

Requirements

• 3+ years of commercial experience with React.
• Strong knowledge of TypeScript.
• Experience with modern state management libraries.
• Solid understanding of JavaScript (ES6+).
• Experience with REST APIs.
• Understanding of responsive design and cross-browser compatibility.
• Experience with performance optimization.
• Familiarity with Git workflows.
• Upper-Intermediate English or higher.

Nice to Have

• Experience with Next.js.
• Familiarity with blockchain wallets and Web3 integrations.
• Experience working in product companies.
• Knowledge of AI-powered frontend tools.

What We Offer

Fully Remote — work from anywhere in Europe.

Long-term B2B cooperation with a competitive compensation package.

Performance and annual salary reviews.

Individual bonus program based on company and personal results.

Annual performance bonus.

Paid vacation and paid public holidays.

Paid sick leave.

Modern equipment budget or laptop provided.

Home office allowance.

Annual learning & development budget for courses, conferences and certifications.

English language classes.

Private health insurance.

Mental health support program.

Wellbeing & sports compensation.

Team buildings, online events and international company retreats.

Flexible working hours with a healthy work-life balance.

Opportunity to work with cutting-edge technologies including AI, Web3 and blockchain.

International team with a startup mindset and product culture.

Real career growth opportunities as the company scales globally.

Why Join Phoenix Games?

We're building products from scratch using modern technologies, without legacy code or bureaucracy. Your ideas will matter, your code will reach thousands of users, and you'll work alongside experienced engineers who value ownership, quality, and innovation.

If you're passionate about React, enjoy solving challenging problems, and want to build the future of online gaming—we'd love to meet you.

What do we expect:

• 5+ years of Software Engineering experience

• 4+ years of experience with React Native + Typescript, a strong understanding of application lifecycle and library components

• Strong Software Design knowledge: FP, Design patterns, state management tools

• Strong experience with RTK Query & Redux

• Experience with Firebase & push-notifications

• Validated experience building web applications for mobile devices and mobile app development for Apple App Store or Google Play Store using RN

• Familiarity with native build tools, like XCode, Gradle, Android Studio, IntelliJ

• Proficient understanding of Git

• Knowledge of Agile (preferably SCRUM) development practices

• At least Intermediate level of English

Would be great:

• Experience with native iOS and Android components

Responsibilities:

• Process improvements proposing and taking ownership of full-cycle of features delivering

• Active participation in technical discussions

• Architect, design, and team cooperation to deliver features and services into production

• Writing and implementing efficient, extendable, and high-quality code in balance with rapid feature delivery

• Cross code reviews, technical documentation creation, and supporting

Join Whitechain — Build the Future of Web3!

At Whitechain, we’re on a mission to revolutionize blockchain, smart contracts, and cryptography. As part of the WhiteBIT ecosystem, we’re building cutting-edge Web3 solutions, from our own EVM blockchain to non-custodial wallets, DeFi platforms, and GameFi experiences.We’re looking for ambitious innovators to help us bridge the gap between retail and corporate blockchain adoption. If you’re passionate about decentralization, Web3, and shaping the future of digital economies, this is your chance to make an impact!

The future of Web3 starts with you — join us as a Front-End Engineer!
 

Requirements:

— 4+ years of professional front-end experience, with production experience predating AI-assisted development – we require an engineering foundation built before coding agents, verified at interview through deep debugging and fundamentals questions;
— Strong React + TypeScript; production experience with Next.js (App Router, server components);
— Practical web3 experience: worked with wallet integrations (custodial or non-custodial), querying RPC nodes, and reading on-chain data, with a working grasp of blockchain fundamentals – transactions, gas, nonces, and EVM basics;
— Hands-on production experience with viem and wagmi (current major versions): wallet connection, contract reads/writes, transaction lifecycle handling (pending/confirmed/stuck/replaced);
— Experience building or integrating cross-chain bridge flows (deposit/withdrawal UX, multi-chain state, confirmation tracking);
— Experience working in a monorepo with shared packages: consuming and contributing to a shared component/utility library, semantic versioning, changelogs, avoiding breaking downstream apps;
— Strong practical AI-tooling expertise: running coding agents (e.g. Claude Code or similar) including parallel agent workflows, reviewing and correcting AI-generated code, building agentic pipelines; a forward-looking mindset toward AI-assisted engineering is a hard requirement;
— Ability to review someone else’s code critically – including AI output – and catch subtle correctness issues, especially in transaction/signing paths;

Would be a plus:

— React Native experience;
— OP-stack rollup experience or knowledge (sequencer, L1 data posting, deposits/withdrawals);
— DeFi protocol familiarity (AMMs/DEXes, token approvals, allowance UX);
— E2E and visual-regression testing experience (Playwright or similar);
— Accessibility and i18n experience;
 
 

Responsibilities:

— Maintain and extend the shared front-end packages (UI components, utilities, web3 helpers, configuration) consumed by all Whitechain applications: triage, fixes, releases, and non-breaking evolution;
— Stand up new user-facing applications quickly from the internal boilerplate and shared platform, taking them from scaffold to production;
— Build and maintain blockchain-facing features day-to-day: wallet connection, contract interaction, transaction submission and confirmation tracking, chain switching, error and edge-case handling;
— Implement and maintain cross-chain bridge user flows (deposits, withdrawals, status tracking);
— Work AI-first: execute with coding agents, run parallel agent workflows where appropriate, and apply rigorous human review to everything an agent produces – with extra scrutiny on signing/transaction code;
— Act as second reviewer on web3-sensitive code paths;
— Contribute to e2e/visual-regression test coverage and keep CI quality gates green;
— Follow and contribute to engineering conventions, ADRs, and documentation.

Work conditions:

Immerse yourself in Crypto & Web3:

— Shape the Future — Work on high-impact blockchain products at the forefront of Web3.
— Innovate & Create — Your ideas drive real-world solutions and technological breakthroughs.
— Global Reach — Build scalable solutions for businesses and users worldwide.
— Web3-Powered Culture — A team of visionaries who believe in decentralization and innovation.
Work-Life Balance & Well-being:
— Modern equipment.
— Comfortable working conditions, and an inspiring environment to help you thrive.
— 24 calendar days of paid leave.
— Additional days off for national holidays.

Technical requirements:

• JavaScript (ES6+)
  • Event loop, scope, closures, async/await.
  • Spread/rest, destructuring.
  • Modular architecture.
  • Understanding of front-end performance optimization.
• React.js and its ecosystem
  • React (Hooks, Context API, React Router).
  • Redux Toolkit (thunks, RTK Query).
  • Working with forms (formik).
  • react-select, axios.
  • Architectural approaches: FSD, container/presenter, atomic design.
• TypeScript
  • Extensive experience in daily use (strict mode, generics, API typing, utility types).
  • Ability to build architecturally sound solutions.
• HTML5 / CSS3
  • Adaptive & responsive layout (mobile-first, desktop-first).
  • Flexbox і CSS Grid.
  • UI optimization for interfaces (admin panels, configurators).
• CSS preprocessors
  • SCSS module
• Tooling
  • Git (branches, code review, CI/CD integrations).
  • Vite — experience in configuration and optimization of builds.
  • NPM (working with monorepo and libraries).
• 3D and integration (advantage)
  • R3F (react-three-fiber), Three.js, PlayCanvas.
  • Threekit SDK, working with player APIs, writing service wrappers.
  • Optimizing the display of 3D models, integrating configurators.
• Testing (advantage)
  • Unit tests (Jest, React Testing Library).
  • E2E tests (Playwright / Cypress).
  • Understanding testing priorities: which scenarios are critical and which can be covered by smoke tests.

Good to have:

• Playcanvas (in particular, integrating models into scenes, managing objects and their parameters)
• Salesforce (understanding Salesforce integration)
• Shopify (experience creating or integrating custom React components into Shopify pages, working with plugins)
   

Additional knowledge that may be useful:

• Node.js - writing small services and API wrappers.
• Бандлери - Experience in setting up custom builds (Webpack, Rollup, Vite).
• Web 3D - understanding the principles of 3D in a browser (materials, lighting, optimization).
• Practice with 3D libraries - implementation of projects on React Three Fiber (R3F), Three.js, WebGL, (PlayCanvas, Threekit SDK would be a big plus).
• English language - level A2+ (basic communication, reading technical documentation).

Who suits us:

• Architectural thinking: able to balance between “doing it right” and “doing it on time.”
• Systematic communication: reports risks and progress in a timely manner.
• Responsibility: sees tasks through to completion, including integration into production.
• Knowledge sharing: documents complex decisions so that others can pick them up more quickly.

Domain:

• Web 3D configurators (furniture, interiors, household appliances) and their integration with e-commerce (Shopify, Salesforce).
• DAM system for managing 3D resources and working with them.
   

What you will be doing:

• Development and support of Web 3D configurators.
• Configuration of business logic for interaction with 3D objects (dynamic validation, attributes, rules).
• Development and updating of configurator interfaces (React, TypeScript).
• Integration of configurators into customer websites and e-commerce systems.
• Development of admin panels for managing 3D resources and users.
• Writing small services and wrappers for third-party APIs (Threekit, Shopify, Salesforce).

Working conditions at the company:

• We offer work on projects from scratch and support for existing projects;
• The opportunity to work on projects, offering your own technological solutions;
• Work with major international brands;
• A friendly and creative team;
• Professional growth;
• Full-time employment;
• Flexible work schedule;
• Paid sick leave and vacation.

ONLY POLAND WROCLAW
 

We are looking for a Junior FrontEnd Developer to join our team. At Synebo, we deliver Salesforce solutions with quality, friendliness, and efficiency. This role offers a unique opportunity to grow as a FrontEnd Developer while deepening your understanding of the Salesforce platform.

Requirements:

— 1+ years of professional experience in Frontend Developer role.

— Proficiency in JavaScript, HTML, and CSS.

— Experience with frontend frameworks such as React or Angular.

— Understanding of RESTful APIs and integration with backend services.

— Familiarity with version control systems like Git.

— Knowledge of responsive and adaptive design principles.

— English level — upper-intermediate or higher.

Will be a plus:

— Basic understanding of the Salesforce Platform and Lightning components.

Responsibilities:

— Develop and maintain user interfaces using Salesforce platform frameworks.

— Ensure the technical feasibility of UI/UX designs.

— Collaborate with backend developers to integrate components with server-side logic.

We offer:

— Budget for Medical Insurance

— Paid vacation

— Paid sick leaves

— “Synebo Talk” internal educational program

— Sport activities online

— English lessons

— Team building activities (online/offline)

— Salesforce certification

— Regular cultural events

— Well-being program

About us:

Farsight Vision converts flight footage into digital 2D and 3D twins for real-time intelligence in GNSS-denied environment, making analytics and situational awareness convenient and accessible while saving time and effort. We create multi-layered digital twins of terrain with dynamic tracking and object/landscape monitoring and predicting.

We’re looking for a Frontend Developer to join our young, fast-paced product team. You’ll contribute to rapid development and prototyping, focusing on quickly building new features and launching a new platform version soon.

Responsibilities:

• Define and implement complex, scalable frontend architecture, ensuring high quality and maintainable code.
• Lead the translation of high-level technical requirements and user stories into robust and high-performing user interfaces.
• Serve as the technical authority in team discussions, including architectural planning, defining coding standards, and conducting detailed code reviews.
• Own the requirements refinement process, providing expert assessment on technical feasibility, performance optimization, and UX best practices.
• Initiate, propose, and implement significant improvements to existing codebases, development workflows, and CI/CD processes.
• Take full ownership of resolving critical and complex frontend issues, establishing performance metrics, and ensuring architectural resilience.
• Mentor and coach Junior and Mid-level developers, fostering a culture of technical excellence and high accountability within the team.

Requirements:

• 7+ years of hands-on experience in the full software development lifecycle.
• Deep expert knowledge of browser internals (LocalStorage, SessionStorage, etc.) and performance optimization techniques.
• Exceptional mastery and deep expertise in JavaScript/ES6+ and its modern ecosystem.
• Proven ability to architect complex applications using TypeScript, including advanced typings and design patterns.
• Extensive experience (as a primary technology) with React v19, with a focus on building scalable and maintainable component libraries.
• Expert experience in evaluating, implementing, and managing state management solutions (Zustand, Redux, MobX) in large-scale applications.

Would be a plus if you have:

• Practical experience working with AWS services (S3, Lambda) and containerization (Docker).
• Experience working with geospatial data and mapping libraries (Leaflet, Folium).
• Experience working with 3D models and/or complex data rendering.
• Basic understanding of Python and Postgresql DB.

Why you should join us:

• With us, you will become part of a team of professionals who strive to contribute to the development of advanced technologies.
• We value teamwork and create an atmosphere of mutual support where everyone can unleash their potential.
• Flexible work schedule.
• Paid vacation and sick days.

Security Eligibility
Our platform is actively used by the Armed Forces in live operations. As an Estonian-Ukrainian defense technology company handling sensitive operational data, we have a responsibility — legal, ethical, and practical — to ensure the integrity of everyone on our team.
All candidates must be able to confirm the following:
- Neither you nor your close relatives (parents, spouse, siblings, children) reside in Russia, Belarus, or temporarily occupied Ukrainian territories
- You have no regular personal, financial, business, or professional contact with individuals in those territories
- You consent to a deeper security verification if the process advances to later stages
If any of the above criteria are not met, please do not proceed with your application.

Why this role exists:

The purpose of this role is to design and implement scalable software solutions, ensuring high-quality delivery within established timelines. The role focuses on solving complex technical challenges, improving engineering practices, and contributing to software reliability and performance. A Senior Developer mentors peers, shares technical expertise, and collaborates with cross-functional teams to deliver solutions that meet business requirements.

What you’ll drive:

Architecture and development

• Designing and implementing scalable and efficient software architectures.
• Writing, testing, and debugging complex code for new and existing software applications.
• Delivering code to production in a timely manner according to business expectations.

Leadership and collaboration

• Providing guidance and mentoring to junior engineers and team members.
• Conducting thorough code reviews to ensure code quality, security, and best practices.
• Managing software development projects, ensuring timely delivery and quality.
• Collaborating with cross-functional teams to design and align technical solutions that meet business objectives
• Communicating effectively with stakeholders on technical concepts.

Engineering processes and quality assurance

• Creating and maintaining comprehensive technical documentation for software development and system design.
• Creating and maintaining comprehensive technical documentation for software development and system design.
• Researching and implementing new technologies and methodologies to improve software performance and development processes.
• Identifying and resolving complex software issues and technical challenges.
• Developing and enforcing testing protocols to ensure software reliability and performance.
• Driving continuous improvement in software development practices and processes.

What makes you a GR8 fit:

Must-have

• Minimum of 5 years of experience in a similar senior engineering role;
• Deep knowledge of JavaScript, TypeScript, React, HTML, CSS, state management libraries, build tools, package managers, and web testing frameworks;
• Experience with microfrontend architectures and Module Federation patterns (Webpack Module Federation, dynamic remote loading, shared dependency management);
• Ability to analyze code, debug complex issues, optimize performance, and develop proofs of concept (PoCs);
• Understanding of web performance metrics and browser performance optimization, including Core Web Vitals (LCP, INP, CLS), FCP, TTFB, TBT, Speed Index, Time to Interactive (TTI), bundle size, and JavaScript parsing and execution performance;
• Understanding of browser internals, SPAs and static websites, client-server architecture, REST APIs, SSR, web security, and UI/UX patterns;
• Effective communication skills with both technical and non-technical audiences;
• Upper-Intermediate English level.

About Flamingo

Flamingo is revolutionizing the Managed Service Provider (MSP) industry with an AI-driven, open-source platform for IT and security. Our goal is to empower MSPs with automation, optimization, and scalability tools to enhance their operations.

Role Overview

As a Front-end Engineer at Flamingo, you’ll play a key role in building the core user experience and backend logic behind our AI-powered platform.

This is a hands-on engineering role with ~80% frontend and ~20% backend where you’ll collaborate with product designers, DevOps, and fellow engineers to ship quickly, iterate often, and build systems that scale.

Key Responsibilities

• Build and maintain core product features using Next.js and TypeScript
• Work with Relay and GraphQL on our main product; integrate REST APIs on internal tooling
• Collaborate with backend engineers on API and schema design
• Translate product and design specs into high-quality, user-centric interfaces
• Ensure performance, accessibility, and responsiveness across modern browsers
• Collaborate closely with the design team to evolve and maintain our design system
• Write clean, modular, well-tested code and contribute to code reviews
• Participate in architecture discussions and technical decision-making

Must-Have

• 5+ years of experience in frontend development
• Strong proficiency with React, Next.js (App Router), and TypeScript
• Hands-on experience with Relay and GraphQL - fragment colocation, pagination, store management
• Solid understanding of modern frontend architecture and component design
• Strong understanding of web standards, performance, and responsive design
• Experience working with REST APIs and integrating third-party services
• Strong Git workflow and code review culture

Nice-to-Have

• Experience with Supabase or similar BaaS platforms
• Familiarity with server-side rendering and performance optimization
• Understanding of database design (SQL)
• Exposure to authentication flows (OAuth, JWT, magic links)
• Familiarity with accessibility and internationalization best practices
• Experience with CI/CD workflows and deployment pipelines

Why Join Flamingo?

• High-impact role: As a front-end engineer, you’ll work across the entire product experience from backend architecture to the user interface, shaping how thousands of MSPs interact with our platform.
• Ownership & Equity: Competitive compensation and a meaningful equity stake in a high-growth, early-stage startup.
• Modern Tech Stack: Built with React, Node.js, and open-source tools, all in a scalable microservices architecture.
• Remote-first Culture: Work from anywhere and collaborate with a team of senior engineers, designers, and product leaders.
• Mission-Driven Team: Be part of a company that’s redefining how IT and security services are delivered, making powerful automation tools accessible to all MSPs, not just the enterprise giants.

Product that needs your engagement 

You will be at the heart of building a new generation web-based application fully powered by AI technologies. This product is envisioned as a cutting-edge tool that redefines how professionals interact with complex data and workflows. We’re not just adding AI features into an existing app - we are designing an AI-first experience from the ground up, where automation, personalization, and intelligence are embedded in every interaction. The application will combine scalability, intuitive UX, and deep AI integration to create a solution that is both technically robust and delightful to use.

Your future team of professionals 

You will join a young but growing, ambitious team that thrives on collaboration and innovation. 

Today the team includes:

• 1 Software Architect defining the overall technical direction and system design
• 2 skilled Backend Engineers + 1 Frontend Engineer who ensure strong architecture and data handling
• 1 Product Manager driving the vision, roadmap, and priorities
• 1 QA Engineer guaranteeing product quality and reliability

As we expand, this team will grow rapidly, and your role will be pivotal in setting both the technical and cultural tone of our engineering organization.

Your future challenges 

As a Middle Front-end Developer, you will take on a founding role in building this application from scratch. Your challenges will include:

• Shaping the architecture and technical stack of a greenfield AI-driven web app
• Translating ambitious product ideas into production-ready features
• Partnering closely with backend engineers to define clear API contracts for AI services
• Solving novel technical problems, from real-time data visualization to seamless human-AI interactions
• Balancing speed of delivery with long-term scalability and performance
• Setting engineering standards and mentoring less experienced developers
• Acting as a thought partner to the Product Manager in exploring “what’s possible” with modern AI technologies.

This is a rare chance to work on a zero-to-one product, where your decisions will directly shape the outcome.

Impact you will make 

• Develop responsive, scalable UI components using HTML, CSS, JavaScript/TypeScript, and React.js
• Ensure cross-browser compatibility and accessibility compliance (WCAG standards)
• Work closely with backend developers to integrate APIs
• Partner with UX/UI designers to translate designs into seamless user experiences
• Participate in code reviews and contribute to continuous improvement of team practices
• Identify and resolve performance bottlenecks in React apps

Tech stack you'll be working with

• UI/Styling - Tailwind
• State Management - Zustand + TanStack Query
• Forms - React Hook Form + Zod
• Routing - TanStack Router
• Monorepo orchestration - Turborepo

Skills we are looking for 

• At least 4 years of experience as a Front-end Developer, preferably in a tech environment
• Higher education in Computer Science, Information Technology, or a related field (relevant certifications are a plus)
• Strong proficiency in JavaScript and TypeScript 
• Deep understanding of software principles: SOLID, IoC, OOP, design patterns, and client/server architecture
• Expertise in React.js and state management
• Version control with Git and collaborative workflows (branching, pull requests, reviews)
• Familiarity with authentication concepts and secure application development
• Experience with testing frameworks 
• Knowledge of Docker/docker-compose and basic CI/CD processes
• Performance optimization skills: profiling JS/React apps, identifying bottlenecks, keeping apps fast

Benefits you get

• Maintain your work-life balance

Manage your own working hours with our flexible schedule

19 days of annual vacation granted on a pro-rata basis

No overtimes required

• Hybrid/remote type of cooperation

Whether you prefer to work remotely in the comfort of your home office or from one of our 4 offices, you can still take part in increasing the world`s awareness about quality Ukrainian products from any part of the world

• Stay healthy

Medical insurance from one of the top insurance companies in Ukraine with a wide range of included services, as well as special programs for relatives; and special options for those who live abroad.

15 working days of sick leave per year — because your health is a priority.

• Grow with us

In-house English courses — increase your proficiency through our online courses and speaking clubs with a native speaker

Online learning activities — workshops, lectures, and webinars to enhance your leadership, management, and self-awareness skills

Experience exchange — we are proud of our team of professionals who gladly share their deep expertise in all kinds of fields with the rest of the team

Promotions, rotations, and transitions — when you believe your skills could benefit a different role or team.

• Stand with Ukraine!

We have an active pro-Ukrainian position, and that means we help our army, our servicemen, and their families not only through constant donations and volunteering, but also through our military leave policy, special health insurance options, and financial help

We are a perfect match if you share our values

We are professionals in our field.

We know how to turn up our professionalism to the maximum, because we are experts who enjoy solving complex tasks.

We know how to focus on the product, think big, and at the same time delve deep into the details.

We create a calm and friendly atmosphere within the company.

We value the freedom of open and transparent communications.

Radical honesty is embedded in the foundation of our culture.

We are open to new things and constantly develop and practice regular knowledge sharing, which helps us evolve continuously.

Most importantly, the company creates an environment where we can fulfill our potential upon a solid foundation.

Our Hiring Process

• Recruitment Interview
• Technical Interview
• Offer Call