Jobs React.js

About the Role
We are building a dedicated team to develop a mobile trading application for a
B2B client. The product will replicate and extend the functionality of an existing,
production-ready trading platform built on non-React technology, with a
completely new UX/UI.
We already have:
-  A working backend and trading infrastructure
-  An existing trading application (as a functional reference)
-  Strong domain expertise in trading and fintech
We are now looking for a Senior React Native Developer who will take
ownership of the mobile architecture, bring best practices, and lead the technical
implementation of the new app.
This is a high-impact role with real ownership — you will define how the app is
built, not just implement tickets. We are not looking for someone to “just code”.
We need someone who can take responsibility for how the mobile app is built
and guide the team toward a solid, production-grade result.
Responsibilities
- Design and implement scalable, maintainable architecture for a React
Native application
-  Lead the mobile development effort from early stage to production
-  Define and enforce best practices for code structure, state management,
performance, and testing
- Work closely with backend, product and DevOps teams to shape APIs and
integration patterns
-  Make key technical decisions (navigation, data layer, realtime updates,
storage, auth, etc.)
-  Mentor other developers and raise the overall engineering level of the
team
-  Ensure high performance and reliability (critical for trading use cases)

-  Actively leverage AI tools (e.g., code generation, debugging, testing,
research) to accelerate development and improve code quality and
continuously explore new ways to apply AI across the development
lifecycle.
Requirements
Must have
-  4+ years of experience with React Native in production
-  Strong understanding of mobile app architecture (modularization,
scalability, maintainability)
-  Experience building complex apps (real-time data, high reliability,
performance-sensitive flows)
-  Deep knowledge of JavaScript/TypeScript
-  Experience with state management solutions
-  Experience with REST APIs and WebSockets
-  Understanding of mobile performance optimization
-  Experience publishing apps to App Store and Google Play
-  Ability to choose between Expo / bare RN, understanding trade-offs, where
Native layer is required, and making similar decisions
Nice to have
-  Experience in fintech / trading / high-frequency data apps
-  Experience working with charts, streaming data, or real-time systems
-  Familiarity with backend concepts (API design, event-driven systems)
-  Experience with testing strategies (unit, integration, e2e)

We offer:
• Remote work
• A decent and timely salary
• Assistance at all stages of our cooperation
• Work in a stable and developing company
• A young team of professionals
• Responsive management
• Support of the company in professional development
• Insurance after trial period
• Gym compensation
• Education course
• English course

About the Company

We are a European IT company with 200+ specialists delivering SaaS platforms, enterprise solutions, and cloud-native products for clients worldwide. We focus on building strong, long-term teams and supporting continuous professional growth.

About the Internship & Project
We are looking for a motivated Intern Developer to join our team with the opportunity for further employment. You will work on a real project in the telecommunications domain, gaining hands-on experience in a professional environment.

Tech Stack

• Frontend: React, JavaScript, HTML, CSS
• Backend: Laravel 
   

Responsibilities
 

• Develop and maintain frontend features using React
• Collaborate with mentors and team members
• Learn backend basics with Laravel
• Contribute to improving product functionality and user experience

Requirements
 

• Basic knowledge of React and JavaScript (not mandatory commercial experience)
• Basic knowledge of PHP and Laravel (nice to have)
• English level: B2+
• Links to pet projects, GitHub, or course work
   

Why This Internship is Exciting

• Great opportunity to start your career in IT
• Work with experienced developers and mentors
• Gain real-world development experience
• Work with modern technologies

We are looking for a React Native Team Lead to take ownership of the mobile direction and build the architecture of our cross-platform application from the ground up. You will define technical standards, lead mobile development, and collaborate closely with backend engineers, designers, and product managers to deliver a scalable, high-quality mobile product.

Requirements:

• 6+ years of commercial experience in mobile development.
• 4+ years of experience with React Native in production.
• Proven experience as a Tech Lead or Team Lead on mobile projects.
• Strong knowledge of JavaScript (ES6+) and TypeScript.
• Deep understanding of mobile architecture patterns (MVVM, Clean
• Architecture, modular architecture).
• Experience designing and building scalable mobile applications from scratch.
• Strong experience with state management solutions (Redux, Zustand, React Query).
• Experience integrating REST APIs and working with asynchronous data flows.
• Solid understanding of mobile performance optimization and memory management.
• Experience with native modules (iOS/Android) and ability to work with platform-specific code.
• Familiarity with mobile CI/CD pipelines and app release processes (App Store / Google Play).
• Experience with testing (unit, integration, e2e) for mobile applications.
• Strong experience with Git and team collaboration workflows.
• Upper-Intermediate or higher level of English.

Responsibilities:

• Own and define the mobile architecture and technical vision of the product.
• Lead the development of the React Native application from scratch or scale existing solutions.
• Make key technical decisions regarding libraries, structure, and best practices.
• Build and mentor a mobile development team.
• Collaborate with backend, product, and design teams to define and deliver features.
• Ensure high code quality through code reviews and best practices.
• Implement complex mobile features and business logic.
• Optimize application performance, stability, and scalability.
• Establish development processes, CI/CD pipelines, and release workflows.
• Drive continuous improvement and modernization of the mobile codebase.

We offer:

• Competitive salary.
• Remote work format.
• Work on international, production-grade products.
• Salary tied to the dollar exchange rate.
• Influence product and technical decisions at the architectural level.

Build apps that truly make a difference. We're a fresh and ambitious AI studio creating meaningful, in-house products that empower people through better mental health, education, and personal growth. Our work combines human empathy with cutting-edge AI — and we're just getting started.

Role Description

We're looking for a versatile and experienced React Native Frontend Developer to join our passionate, fast-moving team. If you're excited by the idea of building mobile apps that are not just smart but soulfully designed, we want to hear from you.

What you'll do:

• Build and maintain cross-platform mobile apps using React Native and Expo
• Write clean, scalable, and maintainable code with attention to performance
• Work with the Expo toolkit (CLI, Go, EAS Build/Submit) to streamline development and delivery
• Collaborate closely with designers and backend developers to build seamless user experiences
• Integrate with RESTful APIs and backend services
• Use modern state management tools like Redux, Zustand, or Context API
• Build responsive UI components with care for animations and accessibility
• Identify and resolve bugs across platforms and devices
• Stay current with React Native, mobile UI/UX trends, and AI product design
• Contribute to product development through collaboration and experimentation

Qualifications

• 3+ years of professional experience with React Native
• Solid experience with the Expo ecosystem and its tools
• Strong knowledge of JavaScript (ES6+) and TypeScript
• Experience with state management libraries (Redux, Zustand, etc.)
• Comfortable working with REST APIs and modern development tools (Git, npm/yarn)
• Interest in AI-assisted development — experience with AI coding tools (Cursor, GitHub Copilot, or similar) is a plus
• Enthusiasm for building intuitive and well-designed mobile apps
• Strong problem-solving skills and debugging abilities
• Good communication and collaboration skills in a remote-first environment
• A portfolio showcasing React Native work (especially with Expo) is highly valued

What we offer:

• Full-time remote position with flexible schedule
• Work on meaningful AI-powered products that serve real human needs
• Culture of wellness, clarity, and purpose — we move fast, but with intention
• A small, values-driven team where your contributions matter
• The opportunity to build mindful, intelligent tech with lasting impact

We are seeking a skilled Full-Stack Developer who can handle frontend tasks (React) and, if needed, some back-end tasks (Nest.js). This is a full-time, long-term project with our client from Norway.

‼️ Important: The client would like the developer to come to Norway for onboarding for a few weeks/month (for onboarding, personal introduction). The client will cover all the expenses related to this. ‼️

About the project: The client is developing a product for the maritime industry that will analyze and help plan energy-saving measures to reduce fuel use and greenhouse gas emissions, and, accordingly, reduce the taxes that ship owners currently pay for their environmental footprint.

Requirements and details:

• Minimum 4 years of experience in software development.
• Experience with the required technologies: React and TypeScript (highest priority); Nest.js comes secondary.
• Experience with Microsoft SQL Server and TypeORM.
• Experience with Azure.
• Minimum Upper-Intermediate level of English.
• Full-time.
• Fully remote.
• Long-term.
• B2B contract.
• Start date — asap.

Frontend (React + TypeScript)

• React patterns: Hooks, composition, controlled/uncontrolled forms, states, and error boundaries.
• Tooling: Vite, ESLint/Prettier, code-splitting, lazy loading, asset optimization, Core Web Vitals, and MUI library.
• API clients: OpenAPI-first workflow; experience with generators like Orval and typed clients.

Backend (NestJS + TypeScript)

• Modular architecture: Modules, providers, DI, guards, interceptors, filters, pipes, and middleware.
• API design: REST standards, versioning, idempotency, pagination, consistent error contracts.
• AuthN/Z: JWT, role/permission models, secure headers

Data & Database

• TypeORM with Microsoft SQL Server (Azure SQL Database): Schema design, relations, migrations, indexing, and query performance.

CI/CD & Cloud

• GitHub Actions: Design and maintain reusable workflows for frontend and backend (build, test, lint), caching, secrets, environments, and required checks on PRs.
• Deployment pipelines: Automated deploys to dev/staging/production, integration of database migrations, basic rollback strategies, and approval gates.
• Azure App Service (Web App): Slot deployments (blue-green/staging), app settings and connection strings, health checks, and basic scaling (scale up/out).
• Azure SQL Database: Environment setup (dev/prod), connection management (firewall rules, private endpoints or equivalent), and backup/restore basics.

Observability, Security & Compliance

• Telemetry: Azure Application Insights logs/metrics/traces, dashboards, and alerting (SLOs/error budgets).

Get to know us

Ideals is a global B2B SaaS product company recognized as the most highly rated and customer-centric brand in the secure business collaboration market. Trusted by over 2,000,000 users from 300,000 companies globally, we help people run high-stakes processes and make important decisions with less stress, higher quality, and shorter hours.

Ideals Virtual Data Room (VDR): Secure document sharing and collaboration for due diligence, fundraising, corporate reporting, licensing, clinical trials, and other complex transactions.

Ideals Board: Board and leadership collaboration platform for faster, safer, and more compliant decision-making.

The role

As a Frontend Tech Lead (React), you’ll be a hands-on technical leader in a cross-functional product team building the Ideals Board. You will lead by example in engineering craftsmanship: owning frontend architecture decisions, raising delivery quality, and helping the team move faster with confidence.

What you will do

• Own frontend technical direction for a key area of Ideals Board: architecture, patterns, and long-term maintainability
• Make the design system work properly in real product development: ensure consistency, improve developer experience, and close gaps between design and implementation
• Lead redesigns of key product parts end-to-end (technical + UX): help shape solutions with Product Design and deliver robust implementations
• Raise quality ownership across the team: testing strategy, code review culture, definition of done, and proactive refactoring where it matters
• Drive technical design: write and review technical solutions, identify risks early, and align the team on implementation approaches
• Be a strong hands-on contributor: deliver features, tackle complex tasks, debug production issues, and improve performance and reliability
• Mentor and multiply: coach frontend engineers, share best practices, and grow overall team expertise and collaboration
• Collaborate closely with Product managers, Designers, Backend, QA, and DevOps Engineers to ensure smooth delivery and a great user experience

What you bring

• 6+ years of strong hands-on experience building production web applications with React + TypeScript
• Proven ability to lead technical design: decomposition, trade-offs, and aligning stakeholders on a clear approach
• Experience building or scaling design systems/component libraries, and enforcing consistency in a real product
• Strong engineering fundamentals: maintainability, performance, accessibility, security-minded UI development, and pragmatic quality practices
• Confidence with modern frontend tooling and delivery: testing (unit/integration/e2e), CI/CD, observability, and effective debugging
• Leadership through influence: mentoring, constructive feedback, driving alignment, and creating clarity in ambiguous areas
• A quality mindset: you care about outcomes, user impact, and leaving systems better than you found them

• English at the B2 level

   

Nice to have

• Experience with B2B SaaS products and high-trust environments (security/compliance-sensitive workflows)
• Familiarity with a broader stack and ecosystem (e.g., AWS/Kubernetes, backend integration patterns, API design collaboration)
• Experience running frontend initiatives that span multiple teams (shared components, platform improvements, standards)

What we offer

We highly value our people, so we will empower you with all the resources and support to help you reach your full potential.

For your best work

• Remote-first flexibility to shape your ideal workday
• Home workplace budget
• Resilient home budget for Ukraine-based teammates
• Resilient office in Kyiv & co-working expense coverage
• Individual IT budget for extra equipment
• Top-tier tech and AI-powered tools

For your growth

• Access to Ideals Academy with numerous courses
• Investment in external learning and development activities
• Guidance in Personal Development Plan creation
• Professional literature and subscriptions coverage
• Support of your passion as a speaker or writer
• Internal talent mobility opportunities

For your well-being

• Medical insurance and Wellness Package for sports activities
• Full coverage of mental health sessions for Ukrainian teammates
• Funding for sports competitions
• 20 business days of paid time off per year
• Unlimited health-related time-off

Extra perks

• Budget for meetups with your local team
• Generous internal referral program

Our culture

Commitment, Excellence, Collaboration, Trust and Care are core values to the Ideals team. For us, these are the principles that every Idealer lives and breathes. We are on the lookout for like-minded individuals who share our values. By doing so, we create a team where talents feel at ease and work to the best of their abilities.

Discover more.

Ideals is an equal opportunity employer

Ideals is made up of people from a wide variety of backgrounds and lifestyles. We embrace diversity and invite applications from people from all walks of life. We don’t discriminate against employees or applicants based on gender identity or expression, sexual orientation, race, religion, age, national origin, or citizenship.

Our Customer:

Our client is a fast-growing cybersecurity technology company developing a large-scale platform for simulating cyberattacks and assessing security posture. The product includes complex web interfaces, high-load backend services, and cloud-native components.

Your Tasks:

• Design, develop, and maintain advanced frontend features using React and modern JavaScript (ES6+).
• Build complex UI components, interactive dashboards, and scalable, reusable component libraries (including Storybook).
• Own and evolve the frontend architecture, ensuring high performance, maintainability, and a consistent user experience across the platform.
• Optimize rendering behavior and application performance, minimizing unnecessary re-renders and improving perceived UI responsiveness.
• Collaborate closely with product managers, designers, and backend engineers to deliver high-quality features end to end.
• Participate in technical discussions, frontend architecture decisions, and code reviews.
• Integrate frontend applications with backend APIs (Node.js-based services).
• Work with Git-based workflows and CI/CD pipelines to ensure smooth delivery and deployment.
• Ensure clean, testable, and well-documented code following frontend best practices.

Required Experience & Skills:

• 5+ years of professional experience in frontend or web development.
• Senior-level expertise in React and the modern frontend ecosystem.
• Excellent command of JavaScript, with a deep understanding of how the language works (execution context, async behavior, data handling).
• Strong experience designing and maintaining reusable UI components and design systems (Storybook or similar).
• Solid understanding of frontend application architecture, state management strategies, and data flow patterns.
• Experience optimizing React applications for performance and scalability.
• Working knowledge of backend integration (REST APIs, Node.js services).
• Experience working with relational and/or NoSQL databases (e.g., PostgreSQL, MongoDB) at an integration level.
• Familiarity with CI/CD pipelines and modern development workflows.
• Strong focus on code quality, testing, and maintainability.
• English — Upper-Intermediate+ (written and spoken).

- 3-5 years of JavaScript game development experience;
- Strong knowledge of HTML5/CSS3;
- Advanced Experience in creating HTML5 games;
- Advanced Javascript ES6+;
- Advanced Experience with some of libraries/frameworks (Phaser, Pixi, Three);
- Strong knowledge of object oriented and functional programming, knowledge of game programming patterns, practices and techniques;
- Understanding of performance optimization algorithms, memory management, threading;
- Good delegation and time management skills
- Problem-solving abilities
- Design highly scalable software solutions to improve functionality and system longevity
- Collaborate with project managers to implement end-to-end solutions for complex projects
- Analyze current systems to maintain integrity and improve architecture
- Train in-house personnel and other end users on software and applications
- Remain informed of current trends and technology developments

Обов'язки

- Creating browser-based HTML5 slot games for desktop and mobile devices;
- Participate in code review and tasks planning activities;
- Participate in discussion with clients on requirements for the game;

Буде плюсом

- Knowledge and practical experience with React;
- Experience with Spine animations;
- Understanding WebGL;

When you join Twin Win Games, you can expect the following perks and benefits:
- Flexible working hours and the freedom to work remotely;
- Paid vacation of 20 workdays/year and 5 workdays/year for sick leaves;
- Unlimited unpaid day-offs to take care of personal matters;
- A range of paid benefits to choose from;
- Personal development plan to support your growth
- Skills training to sharpen your expertise;
- Education office featuring internal and external experts and mentorship programs;
- Structured processes through our corporate confluence;
- Open-minded management style with transparent communication of company strategy and plans;
- Performance-based reviews to recognize and reward your contributions;
- Stress management initiatives, including 1-1 meetings and a feedback culture;
- Engaging in corporate team-building events, marathons, and online challenges;
- Family-friendly policies, including special congratulatory gifts for personal milestones like the birth of a child or a wedding.

If you are an ambitious and enthusiastic professional, always eager to learn and achieve the best results, Twin Win Games is the place for you! We offer ample opportunities for personal development and professional growth. Join us as we continue to create innovative and exciting gaming experiences.

We are looking for an experienced Team Lead / Senior React Developer to join a fast-growing crypto trading product company. You will take ownership of frontend architecture, lead development efforts, and build high-performance, real-time web applications used by traders worldwide. The role combines hands-on development with technical leadership in a dynamic fintech environment.

Details: 

Employment Type: B2B

Work Mode: Fully Remote

Industry: Crypto / FinTech / Trading Products

Start: ASAP 
English: Fluent 
Ukrainian: Native 

Key Responsibilities

Lead and contribute to the development of a high-performance web trading platform

Design and maintain scalable frontend architecture following best practices

Develop clean, efficient, and maintainable code using JavaScript, TypeScript, and React

Work with real-time streaming data, WebSockets, and REST APIs

Manage application state using Redux and related libraries

Collaborate closely with backend engineers, product managers, and UI/UX designers

Implement UI animations and ensure pixel-perfect design implementation

Optimize performance, debug complex issues, and ensure application stability

Introduce and maintain unit and UI tests to ensure code quality

Take ownership of technical decisions and mentor team members

Required Skills & Experience

7+ years of professional experience in web development

5+ years of experience on a leading position

Strong expertise in JavaScript, TypeScript, and React

Solid knowledge of HTML, CSS, and modern frontend standards

Experience with Redux and common React ecosystem libraries

Strong understanding of RESTful APIs, networking concepts, and WebSockets

Hands-on experience with SignalR for real-time communication

Experience using debugging and monitoring tools such as Sentry

Strong problem-solving skills and attention to performance optimization

Ability to thrive in a fast-paced fintech or product-driven environment

Experience with development of crypto/trading project - MUST!

Nice to Have

Experience with TradingView or similar charting libraries

Background in fintech, trading platforms, or crypto products

Understanding of financial markets and trading workflows

Experience using modern AI tools to improve development speed and productivity

Strong collaboration experience with designers using Figma

About Wonderment Apps

Wonderment Apps is a technology development and design firm that provides scalable teams to create truly inspirational technology for Enterprise Technology Companies, Startups, and Traditional Businesses. Our core philosophy is to create a sense of Wonderment in every product and feature we build — whether it's a rigorous backend integration or a beautifully designed consumer experience.

Role Overview

We are seeking an experienced Senior Shopify Developer to lead the design, development, and optimization of Shopify-based storefronts and headless commerce solutions. You will work across complex ecommerce ecosystems — integrating Shopify with modern JavaScript frameworks, third-party APIs, and ERP systems — while championing performance, accessibility, and scalability best practices.

Responsibilities

• Architect, build, and maintain Shopify storefronts using Liquid, Shopify CLI, and Online Store 2.0 (OS2) theme architecture with sections, blocks, and metafields.
• Develop headless and composable commerce solutions using Shopify Hydrogen (Remix-based) and the Storefront API.
• Build custom Shopify apps (public and private) using Shopify App Bridge, Admin API, and Webhooks.
• Integrate Shopify with ERP systems (e.g., NetSuite, SAP), CRM platforms, and third-party logistics (3PL) providers via REST and GraphQL APIs.
• Implement and maintain integrations with marketing tools including GA4 data layers, GTM, Klaviyo, Attentive, and Algolia search.
• Collaborate with designers to implement pixel-perfect, responsive, and accessible (WCAG 2.1) UI using modern CSS and React/TypeScript.
• Lead performance optimization initiatives — Core Web Vitals, lazy loading, image optimization, and CDN strategies.
• Conduct thorough code reviews, enforce coding standards, and mentor junior developers.
• Participate in the full SDLC: requirements gathering, architecture design, sprint planning, QA, deployment, and post-launch monitoring.
• Contribute to CI/CD pipeline improvements using GitHub Actions or similar tooling.
• Stay current with Shopify platform changes, new APIs, and ecosystem updates.

Requirements

• 5+ years of professional software development experience, with 3+ years focused on Shopify development.
• Expert-level proficiency in Shopify Liquid templating and Online Store 2.0 architecture (sections everywhere, blocks, metafields, metaobjects).
• Strong command of Shopify Plus features: Scripts (and migration to Shopify Functions), Launchpad, multi-currency/multi-language, B2B Commerce.
• Experience with headless Shopify development using Hydrogen (Remix) and the Storefront API (GraphQL).
• Proficiency in modern JavaScript/TypeScript, React, and state management patterns (Zustand, Redux, or Context API).
• Solid understanding of Shopify's GraphQL Admin API and REST API; able to design and build custom Shopify apps.
• Experience with Shopify App Bridge 3.x for embedded app development.
• Familiarity with Shopify Functions (discount functions, payment customizations, delivery customizations) as the modern replacement for Scripts.
• Hands-on experience with version control (Git), code review workflows, and CI/CD pipelines.
• Strong grasp of responsive design, CSS (including modern CSS Grid/Flexbox), and cross-browser compatibility.
• Experience integrating analytics tools: GA4 with data layers, Google Tag Manager, and server-side tracking.
• Excellent written and verbal English communication skills; comfortable working with distributed/remote teams.

Nice to Have

• Experience with Shopify Markets for international commerce (multi-currency, multi-language, geolocation).
• Familiarity with Shopify's new B2B Commerce features and company/location-based pricing.
• Experience with Algolia InstantSearch integration on Shopify.
• Knowledge of Shopify Checkout Extensibility (checkout UI extensions, post-purchase extensions).
• Experience with Node.js or serverless functions for building Shopify app backends.
• Understanding of TDD/BDD methodologies and testing frameworks (Jest, Playwright, Cypress).
• Experience with performance monitoring tools (Lighthouse, SpeedCurve, Datadog RUM).
• Familiarity with Contentful, Sanity, or other headless CMS platforms integrated with Shopify.
• Knowledge of accessibility standards (WCAG 2.1 AA) and assistive technology testing.

Technology Stack

Shopify Plus  |  Shopify Hydrogen (Remix)  |  Shopify Functions  |  Shopify Liquid  |  React / TypeScript  |  GraphQL  |  Node.js  |  Tailwind CSS  |  Git / GitHub  |  NetSuite  |  GA4 / GTM  |  Klaviyo  |  Algolia  |  Vercel / Oxygen

What We Offer

• Fully remote position with flexible working hours.
• Competitive compensation based on experience and location.
• Collaborative, engineering-first culture with a focus on quality and craftsmanship.
• Opportunity to work on diverse, high-impact ecommerce projects across multiple verticals.
• Continuous learning and professional development support.

About the Role

We are looking for a Senior Frontend Engineer who thinks like a Product Owner. At BSTN Store, we don't just "deliver tickets"—we build the digital stage for the world’s most exclusive sneaker and streetwear drops.

As a Product Engineer, you will own the frontend of our high-traffic e-commerce platform. You’ll be responsible for ensuring our UI is as premium as the brands we carry (Nike, Jordan, Stone Island) and as fast as the "drop" events our customers crave.

What We Are Looking For

• The Product Mindset: You don't ask "How do I build this?" you ask "Why are we building this?". You understand how a 100ms delay in Time to Interactive (TTI) impacts conversion and revenue.
• Operational Ownership: You don't hesitate to dive deep into logs to troubleshoot a bug. You know your tools and how to monitor the health of an application (e.g., NewRelic).
• Technical Excellence: You are a master of the modern React ecosystem, with a deep understanding of Server Components, SSR/SSG trade-offs, and type safety.
• Streetwear Enthusiast (Bonus): You don't need to be a "sneakerhead," but you appreciate high-end design and premium user experiences.

What You’ll Do

• Own the Storefront: Drive the development of our React/Next.js frontend with a heavy focus on performance and Core Web Vitals.
• Architect for Scale: Build resilient systems that can handle 100x traffic spikes during high-demand sneaker releases.
• Observability & Debugging: Set up monitoring dashboards and use them to catch regressions. When a bug hits production, you are the first to look at the logs to find the root cause.
• Design System Advocacy: Work closely with designers to maintain and evolve our Tailwind-based design system.

Tech Stack

• Core: React, Next.js, TypeScript, Tailwind CSS.

Working with Ukraine

BSTN is a remote-friendly company. We have an established remote workflow and are committed to supporting our Ukrainian colleagues with flexible schedules, understanding of security/availability needs, and stable long-term collaboration.

We're seeking a talented React Developer to join the Retail Broker Web team and contribute to the development of a secure, scalable trading platform. You will play a key role in building and maintaining a modern web application, ensuring high performance, reliability, and compliance while delivering seamless access to trading and account services for users. If you're passionate about modern web technologies and fintech products, we'd love to hear from you!
 

Core Competence:
 

• At least 3+ years of professional experience in web development with a strong focus on React and modern front-end architecture.
• Solid knowledge of TypeScript, Redux, and RxJS for building scalable and maintainable applications.
• Experience in designing, developing, and testing modern web applications.
• Strong understanding of web development principles, performance optimization, and responsive design.
• Proven ability to troubleshoot, debug, and resolve complex technical issues.
• Experience working with Git and within agile development environments.
• Upper-intermediate level of English for effective collaboration within an international team.
   

Preferred Qualifications:
 

• Experience working with design systems and UI component libraries such as MUI or styled-components.
• Familiarity with Express.js and backend communication patterns.
• Experience with analytics and monitoring tools such as Sentry or Google Analytics.
• Prior experience working with fintech, trading platforms, or financial applications.
• Interest in trading, investing, or wealth management products.
   

What We Offer You:
 

• Competitive compensation aligned with market standards and your professional expertise.
• Opportunity to work on a modern fintech product within a collaborative agile team.
• Professional growth through working with modern technologies and scalable systems.
• Flexible work environment with a strong focus on productivity, collaboration, and continuous improvement.

We are seeking a Frontend Developer with a heavy focus on Next.js. You will be responsible for building fast, SEO-friendly, and scalable web applications. If you’ve spent the last year mastering SSR, SSG, and the App Router, you’re the person we’re looking for.

Key Requirements:

Next.js (Must-have): Minimum 1+ year of commercial experience using Next.js in production environments.

React Expert: Solid foundation in React principles and modern hooks.

Tailwind CSS (Bonus Skill): Proficiency in building responsive, modern UIs using Tailwind.

Strong understanding of TypeScript.

Experience with Performance Optimization (Core Web Vitals) and SEO best practices.

Responsibilities:

Develop and maintain high-performance web applications using the Next.js framework.

Implement pixel-perfect designs with a focus on user experience.

Collaborate with the backend team to integrate complex APIs.

About the role

We are looking for a Frontend Developer (for a 2–3 month engagement) with strong expertise in React, Next.js 16, TanStack Query/Form, Zustand, Tailwind CSS v4, and strict compliance with FSD architecture.

You will build new features and evolve existing products in a modern high‑load web environment.
 

Develop new functionality: from requirements analysis to production release.

• Maintain and improve existing projects: refactoring, optimisation, bug fixing.
• Strictly follow FSD architecture (Feature‑Sliced Design):
• Design and implement features, widgets, entities and shared layer according to FSD principles.
• Integrate with backend APIs using TanStack Query (SSR/CSR).
• Implement forms with TanStack Form + Zod: validation, UX improvements, error handling.
• Manage application state with Zustand where global state is required.
• Build responsive, cross‑browser and accessible UI using Tailwind CSS v4.
• Optimise performance: work with RSC, caching, lazy loading, and code splitting.
• Collaborate on UI/UX design with designers/analysts.
• Participate in code review and architectural decisions, and improve internal engineering practices.

Requirements

• 3+ years of commercial experience in frontend development with React.
• Solid experience with Next.js (preferably App Router, SSR/SSG/ISR).
• Hands‑on experience with TanStack Query (including cache management and SSR/initial data).
• Experience with TanStack Form or readiness to adopt it quickly; confident with Zod.
• Experience using Zustand for global state management.
• Strong TypeScript skills (generics, utility types, strict typing).
• Excellent knowledge of Tailwind CSS (preferably v4) and responsive layout.
• Mandatory experience with FSD architecture (Feature‑Sliced Design):
• Understanding of layers: app/pages, widgets, features, entities, shared.
• Ability to design slice public APIs via index.ts.
• Ability to decompose tasks into widgets/features/entities.
• Good understanding of clean architecture, SOLID, and modular design.
• Ability to write clean, maintainable and readable code.
• English is sufficient for reading documentation; spoken English is a plus.

Nice to have

• Practical experience specifically with Next.js 16 (latest features, app router, RSC).
• Experience building design systems or UI kits.
• Performance optimisation background: profiling, Lighthouse, Web Vitals.

Specifically, we are looking for someone with extensive experience in 3D web development, ideally possessing most of the following skills:

WebGL (strong, hands-on experience)

Experience with LuciadRIA (alternatively CesiumJS or comparable 3D frameworks)

Performance optimization for large-scale 3D scenes

3D visualization experience

IFC / BIM experience (nice to have)

TypeScript

Node.js

It would also be a strong advantage if the candidate is a proficient full-stack developer, enabling them to support the team beyond 3D-related topics, including backend and database-related tasks. Depending on seniority and qualifications, I would also consider the candidate for a technical lead role.