Jobs Frontend

Position: Mid-level Frontend Developer

Salary: Competitive, based on experience
Work: Remote

Summary

We are seeking a skilled frontend developer with 4-5 years of experience in Next.js and React to join our innovative biomedical startup. The ideal candidate will have a strong background in building responsive, user-friendly web applications and a passion for creating cutting-edge user interfaces for healthcare software. 

Company Overview

QOVES is a biomedical startup focused on improving patient experiences in cosmetic medical clinics through software. We develop AI-powered applications that predict post-surgery appearances and assist in diagnosing the necessity of cosmetic procedures. Our goal is to transform cosmetic surgery consultations into a well-defined, clinical process of diagnosis and visualization through our software integrations with clinics.

Your Role

• Developing and maintaining our web applications using Next.js and React

• Collaborating with our AI and backend teams to integrate complex functionalities into user-friendly interfaces

• Implementing responsive designs that work across various devices and screen sizes

• Optimizing application performance for maximum speed and scalability • Writing clean, maintainable, and efficient code

• Participating in code reviews and contributing to our frontend architecture decisions

Required Qualifications

• 3-5 years of professional experience in frontend development

• Strong proficiency in Next.js and React

• Excellent knowledge of JavaScript, HTML5, and CSS3

• Experience with state management libraries (e.g., Redux, MobX, or Recoil)

• Familiarity with RESTful APIs and GraphQL

• Version control with Git

• Understanding of cross-browser compatibility issues and ways to address them

• Bachelor's degree in Computer Science or related field (or equivalent work experience)

Preferred Qualifications

• Experience working in a startup environment

• Knowledge of TypeScript

• Familiarity with UI/UX design principles

• Experience with testing frameworks like Jest and React Testing Library 

• Understanding of server-side rendering and its benefits

• Experience with CI/CD pipelines

Why Work at Qoves

• Opportunity to solve real healthcare problems with cutting-edge technology

• Well-funded startup with a strong market presence

• Work with advanced AI technology in a healthcare context

• Collaborate with a talented team in a fast-paced environment

• Competitive salary with equity options

• Performance and quarterly bonuses

• Flexible work arrangements (hybrid or remote)

• Professional development opportunities

Our client is a fast-growing digital platform that transforms how organizations manage complex financial workflows and user roles across multiple tiers. We’re looking for an skilled and proactive Angular developer to join a lean and agile engineering team working on a modern, modular, performance-optimized web application. The ideal candidate will be able to take full ownership of features, ensure real-time performance and fast pace of development.

You will be joining a project that combines user-centric dashboards, secure document flows, automated validation systems, visual analytics, and flexible admin tools — all designed to simplify interaction between companies, consultants, and regulatory bodies.

Responsibilities

• Enhance table components using Angular 12+
• Update real-time dashboards, tables, charts to Angular 21+
• Work with real-time data using WebSockets-based API
• Participate in architecture discussions
• Handle large datasets optimizing rendering performance
• Provide estimations
• Deliver features on time
• Maintain high code quality
• Collaborate and communicate efficiently with your team 

Requirements

• Good knowledge of Angular (12+)
• Strong understanding of RxJS, Observables, and reactive UI patterns
• Knowledge of Angular Material
• Understanding of browser runtime, rendering pipeline
• Understanding of performance optimizations in real-time updates via WebSockets
• Ability to debug, refactor, and optimize large-scale applications

Nice to Have

• Experience with complex forms, step-by-step user flows
• Excellent communication skills

We look forward to your application!

Key Requirements:

- At least 2 years experience with Magento 2 frontend

- Good knowledge of HTML/CSS/JavaScript

- At least B1 English level (B2 will be a HUGE plus)

- Experience with HYVA themes will be a huge plus for the candidate.

Key Responsibilities:

- Creation of Magento 2 themes

- Implementation of responsive design for different web browsers and platforms

- Work with custom JS functionality, adjustment of the frontend functionality of 3rd-party Magento modules

- Supporting existing solutions

- Take part in the development of our own tools and frameworks

- Project deployment and basic testing

We offer:

- Become a part of rapidly growing Ecommerce Agency

- NO russian clients, NO russian colleagues!

- Remote work

- Paid time-off

- Flexible schedule

- Ability for a constant financial and professional growth

- Free of charge Speaking Club

About Us

Smart Capital Center is the only end-to-end, AI-powered platform for CRE investment and financial management. Purpose-built to power real-time underwriting, asset management, and portfolio analysis, the platform combines live data intelligence, workflow automation, and AI-driven insights to accelerate decision-making, reduce risk, and spot opportunities others miss.

Operating at the intersection of Generative AI, finance, and real estate, we build technology that digitizes, automates, and delivers deep insight into every stage of real estate investment and financing transactions.

Our clients include some of the largest real estate and financial institutions in the U.S., including JLL, Pacific Life Insurance Company, and KeyBank. We are a lean, high-performance team building category-defining technology in a $17 trillion industry.

The Opportunity

We are looking for a Team Lead – Senior Frontend Engineer to drive the architecture, quality, and evolution of our frontend systems.

This is a hands-on leadership role. You will guide frontend development standards, mentor engineers, collaborate closely with Product and UX teams, and deliver high-performance, scalable, and elegant user interfaces that power complex financial workflows.

This role operates in an AI-augmented development environment, where engineers leverage modern AI code agents (such as Cursor, Claude Code, Windsurf, etc.) to accelerate development, improve code quality, and increase engineering productivity.

If you thrive in high-ownership environments and enjoy building sophisticated, data-driven platforms, this role is for you.

What You Will Do

Technical Leadership

-Lead frontend architecture decisions and establish engineering best practices
-Mentor and guide frontend engineers through code reviews and design discussions
-Ensure scalability, maintainability, and performance across the platform
-Drive high-velocity feature development while maintaining high code quality
-Establish and promote effective use of AI code agents and AI-assisted engineering tools across the frontend team

Product & UX Collaboration

-Work closely with product specialists and UX engineers to design and deliver a state-of-the-art UI
-Translate complex financial workflows into intuitive and elegant user experiences
-Maintain consistent UI/UX standards across the platform

Frontend Development

-Develop usable, performant, and maintainable frontend applications
-Contribute to component-based development in ReactJS using Redux/MobX
-Handle API integration and API payload preparation/processing
-Optimize application performance and ensure responsive, data-rich interfaces
-Use AI code assistants and code agents (Cursor, Claude Code, Windsurf, etc.) to accelerate development, refactoring, debugging, and code quality improvements

Requirements and Qualifications

-5+ years of successful web development experience
-2+ years in a senior or technical leadership capacity
-Strong programming skills in TypeScript, JavaScript (ES5/ES6), CSS, and HTML
-Deep experience with ReactJS; familiarity with Redux/Flux/MobX
-Experience designing scalable frontend architecture
-Strong problem-solving and system design skills
-Proficiency with Git or comparable version control systems
-Experience working in remote SCRUM teams (daily standups, grooming, sprint planning)
-Hands-on experience using AI-assisted development tools or AI code agents (e.g., Cursor, Claude Code, Windsurf, Copilot, etc.) to improve development velocity and code quality
-Ability to effectively guide teams in adopting AI-augmented engineering workflows
-Strong ownership mindset and ability to lead by example
-English proficiency: Beginner or higher

Nice to Have

-Strong sense of frontend design and UX
-Experience with Webpack, Gulp, or similar build tools
-Familiarity with SASS/SCSS
-Experience in data visualization using ECharts, D3.js, or similar
-Knowledge of Google Maps API or Mapbox
-Experience with testing frameworks such as Jest
-Familiarity with analytics and data-driven applications
-Experience with AI-assisted coding environments and AI engineering workflows
-Experience in high-velocity feature development environments
-Proactive, high-energy, competitive, and creative mindset
-Strong drive for continuous improvement

Benefits of Joining Our Team

-Be at the forefront of innovation in a $17 trillion industry and play a pivotal role in shaping its future

-Interact with leading fintech and real estate companies and the country’s largest financial institutions, assisting them in digital transformation

-Contribute to a product revolutionizing the U.S. real estate industry and trusted by prominent financial institutions

-Flexible work arrangement

-Collaborate with an efficient management team with no bureaucratic hurdles

-Play a vital role as a member of a lean, highly professional team

-Competitive compensation and benefits

-Generous paid time off

Visit us at: https://smartcapitalcenter.com

We are developing Trendz Analytics - an analytics platform that helps businesses make data-driven decisions. It’s a powerful tool featuring extensive visualizations, dashboards, and client-side data processing.
We are looking for a Frontend Developer who will take full ownership of the client-side part of the product and help us elevate the interface to the next level. This role is for someone who enjoys influencing the product and seeing the results of their work every day.

Requirements

• Strong knowledge of the Angular framework and at least 2 years of experience building complex interfaces.
• Confident use of RxJS for managing data streams and complex application states.
• Experience working with REST APIs and solid understanding of frontend–backend interaction principles.
• Proficient use of Git and experience working in product teams where code quality matters.

• Fluent spoken English for regular communication and technical demos with clients.

   

Responsibilities

• End-to-end development - from discussing ideas with the team to deploying finished features to production.
• Maintaining the existing codebase of the analytics platform.
• Communicating with clients.
• Independently testing your code and validating results before release.
• Participating in product planning and proposing new features.

• Collaborating with the team to build a scalable and well-structured frontend architecture.

   

Nice to have

• Experience working with Figma: pixel-perfect implementation and understanding of design systems.
• Experience using AI assistants to speed up development.
• Experience with data visualization libraries and building complex charts.
• Analytical thinking: ability to understand the logic behind the displayed data.

• Basic UI/UX design skills: ability to independently refine the interface to ensure it is intuitive and user-friendly.

   

What We Offer

• Work on a global product (open-source IoT, over 20k GitHub stars).
• Clear tasks and team support.
• Career growth and regular reviews.
• Medical insurance or compensation program.
• 17 vacation days and 10 sick leaves.
• Corporate English classes.
• Comfortable office in Kyiv (Podil) + flexible schedule.

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
• Maintain and improve the architecture, performance, and scalability of the frontend codebase
• Collaborate closely with UX/UI designers and product owners
• Drive best practices in coding and testing for frontend development
• Conduct code reviews

What We’re Looking For:
• 3+ years of experience in frontend development with strong knowledge of Angular (v18+) and TypeScript
• Solid understanding of component-based architecture
• Experience with RxJS, Angular Material, SCSS/CSS3, and responsive design
• Strong knowledge of RESTful APIs, HTTP, and web application security
• Ability to write clean, maintainable, and well-tested code
• Proficiency in version control systems like Git
• Excellent communication skills and a proactive approach to problem-solving

Nice to Have:
• Experience with performance optimization tools and techniques (e.g., Lighthouse, lazy loading)
• 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

Please note that the vacancy is only for candidates ready for offline format of work in Uzhhorod.

Build the most meaningful apps on the latest web technologies!

ABOUT ELEMENTICA

Welcome to Elementica! We are excited to see you on our profile. Elementica is a leading global software development company – expert in delivering web development, mobile application development and IT consulting services of any complexity to clients worldwide.

www.elementica.io

JOB POSITION

We are looking for a talented React Developer to join our Development Team. You will be at the core of our talented Web Apps teams and focus on building the most advanced and meaningful apps and workflows on the latest web technologies.

RESPONSIBILITIES AND DUTIES

As a frontend developer, you will work on our next generation applications, a specific project critical to our customer’s needs. We need our engineers to be versatile, display leadership qualities and be enthusiastic to take on new challenges as we continue to push technology forward.

We are Product oriented developers with a growth mindset. We are curious problem solvers and we like to collaborate, communicate, share knowledge and technical ideas and grow together.

What you’ll do:

- Develop cloud based frontend web applications

- Work in all phases of the software development life-cycle (planning, design, implementation, deployment, monitoring and support)

- Collaborate and grow in a dynamic environment while working in small, agile and cross functional teams

- Use the latest technologies to solve real problems for our customers

- Communicate and coordinate with our engineering team in Ukraine.

What we look for in you:

- Results-orientation, collaborative, pragmatic and agile mindset

- Strong knowledge in working with Javascript, Typescript

- Expertise with the cloud (preferably Microsoft Azure)

- Working proficiency in English (written and verbal)

- Continuous independent learning

We are looking for these skills/experience:

* Strong knowledge of JavaScript and TypeScript

* Experience with React hooks, CSS-in-JS, Redux, Jest, Next.js
* Pixel-perfect designs implementation practice

* Experience working with websockets

* Proficiency in unit and e2e testing, Jest, react-testing-library

* Understanding of common development principles and best practices (SOLID, DRY, YAGNI) and basic understanding of design patterns

* Experience in CI/CD processes is a plus

* Experience with web performance optimizations

What we offer:

* The opportunity to drive the development of cutting-edge software products

* The chance to work on interesting technical challenges such as advanced algorithms, wide integrations or scalable content management

* A positive, highly skilled, young team with a focus on quality

* Hybrid working possibility / Flexible working hours

* Pick your own gear: Linux or IOS - whatever works best for you

* A lot of room for your own ideas. We always highly encourage you to work on them together with the team.

* Outstanding compensation based on experience and 20 days vacation

* Sponsored training opportunities with Udemy

Our job offer React Developer sounds interesting? Then we are looking forward to receiving your application!

We are looking for a Senior Frontend Engineer to join our client's engineering team in a long-term engagement. This is a fully remote, full-time role for someone who takes real ownership of frontend systems end-to-end, collaborates naturally with backend engineers, and cares deeply about code quality, architecture, and user experience.

You will not be expected to work deeply on backend implementation — but you should be comfortable reading it, understanding it, and integrating cleanly with it.

This role is ideal for someone who enjoys ownership, product thinking, and building scalable, maintainable frontend systems used in real production environments.

Key Responsibilities:

• Architect, develop, and maintain complex frontend applications using React and TypeScript
• Build scalable, reusable UI components and architecture within a monorepo setup

• Own frontend features end-to-end — from requirements and UI logic through to API

  integration and production readiness

• Integrate with NestJS-based APIs, ensuring clean and well-typed contracts
• Drive technical decisions around frontend architecture and long-term maintainability
• Ensure high performance, accessibility, and responsiveness across all applications
• Contribute to shared tooling, libraries, and frontend standards within the monorepo
• Collaborate closely with product managers, designers, and backend engineers
• Improve frontend reliability through testing, code reviews, and engineering best practices

Requirements:

• 7+ years of commercial engineering experience — senior-level candidates only
• Expert-level knowledge of React and TypeScript
• Strong grasp of modern frontend architecture, state management (including xState), and performance optimisation
• Experience in monorepo environments (Nx, Turborepo, or similar)
• Solid understanding of API integration patterns — REST and/or GraphQL — and data flows
• Ability to work independently and deliver consistently in a distributed, remote team
• Excellent English communication skills — written and verbal
• AI-native engineering mindset — you actively use LLMs and AI tooling as part of your everyday development workflow
• Proven track record of long-term, high-impact contributions in previous roles

Nice to Have:

• Experience building AI-powered frontend features — streaming responses, AI chat interfaces, real-time feedback UX, or LLM-integrated workflows
• Familiarity with NestJS or backend service architecture
• Experience in fintech, KYC/KYB, or regulated industry products
• Open-source contribution history

What We Offer:

• Fully remote, flexible work culture with long-term stability
• High-impact product work using modern, state-of-the-art technologies
• Strong engineering standards and real technical ownership — no micromanagement
• Transparent, supportive team culture
• Competitive monthly compensation aligned with experience and contribution

How to Apply:

Send us a short intro about yourself and your relevant experience - and tell us your favourite ice cream flavour (ours is cherry🍒).

We are looking for a React Native Developer to build and launch AI-powered mobile apps from scratch on the App Store and Google Play.

Who we are

We are a team with over 8 years of experience in traffic acquisition and monetization. In recent years, we have been actively developing our own mobile apps (Android/iOS), focusing on rapid product launches, hypothesis testing, and scaling successful solutions. We build processes around AI and development automation to accelerate releases and improve product quality. Due to our expansion, we are looking for a strong React Native Developer to join our in-house team. 

Key Benefits

• Greenfield project—no legacy systems, everything built from scratch
• Opportunity to directly influence key technical decisions and architecture
• Fast releases without bureaucracy
• Direct interaction with the CTO
• We actively implement and encourage AI-assisted development

What we expect from you

• 5+ years of development experience (Mobile, Fullstack, or Frontend, React)
• 2+ years of mobile development experience and a solid React Native stack (Expo / EAS – a plus)
• Proven experience building and releasing mobile apps on the App Store and/or Google Play
• Understanding of the mobile app lifecycle and component design principles
• Experience with analytics SDKs and understanding of mobile analytics and attribution (Amplitude, Adjust)
• Proficiency in using LLM/AI tools during the development process
• Portfolio of completed projects that can be demonstrated or discussed in detail
• Strong communication skills and the ability to defend technical decisions with sound reasoning
• Ability to work independently and make technical decisions

Nice to have

• Experience developing apps with ad monetization
• Experience developing apps in the following verticals: Utilities, AI-driven apps, Lifestyle & Wellness, Dating / Social
• Experience developing native modules
• Full-stack background (Python, API and service development)
• Personal side projects brought to release

Technology Stack

React Native, Expo (EAS), TypeScript, Adjust, Amplitude, Sentry, Firebase, REST API, Supabase/PostgreSQL, RevenueCat, Git 

Your tasks

• Develop, maintain, and continuously improve AI-powered mobile apps built with React Native, with a focus on quality and scalability
• Manage full-cycle release management via Expo EAS
• Integrate, analyze, and optimize monetization (ad monetization, IAP) and product analytics systems
• Design and maintenance of CI/CD processes, including the implementation of Over-the-Air updates via Expo EAS
• Develop and launch MVPs to enable rapid testing of product hypotheses
• Participate in the planning, research, and development of new features
• Take end-to-end responsibility for feature development (including testing and documentation)

We offer:

• Fully remote work format with a strong focus on speed, efficiency, and measurable results.
• You’ll be part of a strong team without micromanagement, where independence and a healthy engineering culture are valued.
• Full-time schedule: 10:00–19:00 Cyprus time.
• 20 working days of paid vacation and paid sick leave.
• Probation period of 3 months
• Salary is negotiable and depends on your level and expertise.
• We follow the Cyprus public holiday calendar.

The primary objective of this position is to ensure the quality of CQG products by following and enhancing web-applications and API for Company clients.

Responsibilities:

• Write production quality and test code for the required product according to provided requirements;
• Support the legacy code
• Unit-test development
• Workflow planning and task evaluation
• Requirements design
• Actively participate in discussions regarding technical issues
• Keep commitments and deadlines

REQUIREMENTS:

• Bachelor’s degree in computer science or related discipline
• Over 3 years of hands-on experience
• Strong command of English (from B2 and higher) with the ability to communicate easily on wide range of topics, including technical discussions
• Excellent knowledge of JavaScript and TypeScript
• Knowledge of Angular is a must
• Experience in React or Vue.js
• Experience in CSS3 layout
• Understanding the processes of web-applications (REST API), web-servers and Internet network (HTTP, TCP, UDP)
• Experience in Node.js
• Experience in Git
• Excellent knowledge of OOP principles and project patterns
• High level programming
• High quality code review
• Knowledge of C#, .NET, Linux, SQL ,Angular Material, ag-grid, Docker, Kubernetes and GitLab-CI is an advantage
• Willingness to learn new industry, product or technical knowledge

WE OFFER:
CQG provides a variety of benefits to enhance your personal and financial well-being. Employees and eligible dependents may participate in the following:

• Career and professional opportunities
• Competitive salary
• Medical insurance
• Slovenian classes
• Flexible vacation schedule and paid sick leave days
• Team buildings, meetings with colleagues from other offices, conferences, and much more

We’re looking for a Middle/Senior Frontend Designer / Design Engineer who can take a website from idea to live launch.
Not just design mockups — but actually build, polish, and deploy high-performance websites for our AI/fintech brands.

This is a freelance role for someone with strong taste, sharp product thinking, and solid front-end execution skills.

What you’ll do

• design premium website interfaces in Figma
• turn them into responsive, production-ready websites
• build with React, TypeScript, and Tailwind CSS
• add clean motion, micro-interactions, and smooth UX
• optimize for speed, responsiveness, and technical SEO
• handle deployment from staging to production

What we expect

• 3+ years of relevant experience
• strong Figma skills
• solid React / TypeScript / Tailwind CSS
• strong eye for UI/UX and modern web aesthetics
• experience shipping live websites end-to-end
• understanding of performance, responsive design, and clean front-end architecture
• English good enough for direct communication

Will be a plus

• fintech / startup background
• Framer Motion or similar animation tools
• experience with AI tools in design workflow

What we offer

• fully remote
• flexible collaboration
• fixed-price payment per project
• high ownership
• work on AI + fintech brands with real growth potential

We are looking for a Front End Developer (Angular).

Requirements:

- Extensive experience in developing web applications using Angular 16+.
- Expertise in HTML5, and CSS3/SCSS (including flexbox and grid).
- Deep understanding of JavaScript (ES6), TypeScript, and RxJS.
- Knowledgeable in CI/CD processes with hands-on experience using Jenkins.
- Experienced with version control systems, particularly Git.
- Practical expertise in creating responsive and adaptive web interfaces.
- Strong proficiency in RESTful API integration.

We offer:

- Competitive salary.

- Flexible work schedule.

- Professional development and training.

- Access to paid platforms.

If you are ready to join our team and contribute to the growth of our company, we eagerly await your resume!

Stack: Angular 16–18, TypeScript, RxJS, Angular Material, REST/JSON, WebSockets

 

About the Role

We’re building an Angular-based Admin application to manage Zultys MX.

You will be responsible for designing and delivering a robust, user-friendly admin interface that includes:

• Advanced data tables (virtual scroll, filters, multi-column sorting, inline actions).
• User and call group management tools.
• Administrative dashboards for monitoring system status and service health.

Your role covers the full development lifecycle: Angular UI/UX, RxJS-driven data flows, integration with backend APIs, and production hardening for Electron desktop builds.

Responsibilities

• Develop Angular components and modules for the admin application.
• Implement filters, sorting, and analytics views for large datasets.
• Integrate with REST and WebSocket APIs for real-time updates.
• Handle user authentication, session management, and permissions in the web app.
• Optimize performance (OnPush change detection, trackBy, virtual scroll).
• Collaborate with backend engineers to refine contracts and API endpoints.
• Contribute to build pipelines (Electron packaging, auto-updates).

Requirements

• 5+ years professional experience with Angular (v12+) and TypeScript.
• Deep understanding of RxJS, Angular Material, and performance optimizations.
• Strong knowledge of REST APIs, WebSockets, and data integration.
• Experience with Nginx, CORS, and authentication flows.

Nice-to-have

• Experience with Electron (desktop packaging, main/renderer process, IPC, distribution).
• Background in real-time communications (WebRTC, SIP, or XMPP).
• Familiarity with media streaming, or transcript UIs.
• Experience with cross-platform Electron deployment (auto-updates, code signing, installers).
• Unit/e2e testing .

We are looking for an experienced developer to provide final polishing and ongoing maintenance for the mobile app — a cross-platform application for advanced wearable ring technology.

This is a project-based role focused on getting the app launch-ready, with excellent opportunity for long-term hourly-rate collaboration on maintenance, bug fixes, and new feature development.

Tech Stack

• Frontend: React Native (primary) + custom native modules in Kotlin (Android) and Swift (iOS)

• Backend: Firebase (Firestore + Authentication) for user profiles and wearable (ring) data

   

What You’ll Do

• Take full ownership of the final polishing phase of the cross-platform React Native app
• Complete all remaining UI/UX refinements, performance optimizations, and bug fixes to deliver a premium, smooth user experience
• Develop and maintain custom native modules in Kotlin and Swift for advanced ring functionality (NFC interactions, token management, device pairing, etc.)
• Ensure seamless data synchronization and flow with Firebase
• Support post-launch maintenance, updates, and implementation of new features as needed
• Deliver outstanding reliability, performance, and user experience across both iOS and Android

Requirements

• 3+ years of hands-on React Native experience
• Strong proficiency writing and maintaining custom native code in Kotlin (Android) and Swift (iOS)
• Solid experience with Firebase (Firestore, Authentication, and related services)
• Experience with wearable devices, NFC hardware integrations, or payment-related features is a big plus
• Ability to work independently, deliver clean and maintainable code, and communicate progress clearly

Contract Details

• Project-based with milestone payments for final delivery
• Competitive hourly rate for ongoing maintenance, updates, and additional features
• Fully remote
• Long-term collaboration possible if the partnership works well