280 Empregos para React Js - Brasil

In Short

Arke is actively searching for a qualified Front-end developer in Brazil. You'll join our dynamic team, collaborating directly with our Brazil Country Head and fellow developers to create intuitive, appealing, and performant web applications for our clients. We’re looking for someone passionate about crafting outstanding user experiences and eager to stay current with evolving digital technologies.

Code samples are required.

What You’ll Be Doing

• Collaborate with team members and clients to design and implement high-quality solutions based on technical and business requirements.
• Use modern development standards and tools to create software applications that delight users.
• Produce detailed documentation, test plans, and maintain well-documented, clean, and efficient code.
• Foster trusted partnerships with coworkers and clients.
• Develop interactive prototypes to explore innovative UI solutions.
• Develop tested and documented TypeScript, HTML, and CSS.
• Build responsive and cross-browser compatible applications optimized for desktop and mobile.
• Adhere strictly to branding guidelines and UX standards.
• Maintain positive and productive working relationships with stakeholders, peers, and management.

What We’d Love to See

• 2–4 years of professional front-end development experience.
• Hands-on experience with HTML, CSS, and TypeScript.
• Proven professional experience using React.
• Familiarity with Git workflows and branch strategies.
• Experience with browser compatibility testing and debugging
• Strong understanding of UI design principles and layout aesthetics.
• Basic knowledge of SEO best practices.
• Intermediate spoken English, fluent in written English.

Soft Skills

• Ability to perform well in a fast-paced environment.
• Have excellent analytical and multitasking skills.
• Be reliable and dependable, consistently meeting deadlines and commitments.

Nice to have

• Experience with Next.js.
• Familiarity with additional front-end frameworks.
• Experience with content management systems (CMS).
• Bachelor’s Degree or equivalent experience in Computer Science, Information Systems, Business Administration or related fields.

Who We Are

Arke is a full-service experience design and technology consultancy that believes in providing more – much more. We change the way brands approach digital transformation and create defining moments to better connect brands with their customers. Arke’s core values are the soul of who we are and shape everything we do. We are authentically unique, operate with high standards, and love what we do.

Modelo de contratação: PJ.

Modelo de atuação: Remoto.

Pagamento em USD/h!

• Mandatório Inglês Avançado/Fluente para Conversação.

Job Functions, Essential Duties and Responsibilities

• Develop and maintain the front end of the agent assist chatbot and email auto-drafting tool using React and modern JavaScript/TypeScript .
• Build dynamic UI components that integrate with real-time AI services and backend APIs.
• Collaborate with product owners, designers, and backend developers to create seamless and intuitive user interfaces.
• Write clean, maintainable, and efficient code following best practices and coding standards.
• Collaborate with backend engineers to interface with services built in Python and data stored in PostgreSQL .
• Ensure the technical feasibility of UI/UX designs and optimize applications for maximum speed and scalability.
• Participate in code reviews, testing, and continuous integration processes.
• Translate product requirements and user feedback into elegant, functional interfaces.
• Assist in estimating and planning throughout the software development life cycle.

Experience, Skills, Knowledge Requirements

• Proven experience in building complex front-end applications using React.
• Ability to write and maintain backend services and scripts using Python.
• Knowledge of database design, querying, and optimization, particularly using Postgres
• Strong understanding of HTML, CSS, and JavaScript.
• Exposure to GraphQL, and/or Azure Functions and Azure OpenAI
• Experience using version control systems such as Git.
• Experience with RESTful APIs and integrating front-end components with backend services.
• Excellent problem-solving skills and attention to detail.
• Strong communication and collaboration skills.
• Experience working with other developers, quality engineers (QE), ops engineers and support engineers to ensure smooth deployment and continual operation
• Passion for developing good software
• Experience participating in design discussions with both technical and non-technical audiences.
• Familiarity or experience with Agile engineering practices (test driven development, continuous integration and pair programming, etc.)
• Understanding of web technologies (HTTP, Apache, HTTP Proxies)
• Experience with continuous integration and deployment (CI/CD)

Modelo de contratação: PJ.

Modelo de atuação: Remoto.

Pagamento em USD/h!

• Mandatório Inglês Avançado/Fluente para Conversação.

Job Functions, Essential Duties and Responsibilities

• Develop and maintain the front end of the agent assist chatbot and email auto-drafting tool using React and modern JavaScript/TypeScript .
• Build dynamic UI components that integrate with real-time AI services and backend APIs.
• Collaborate with product owners, designers, and backend developers to create seamless and intuitive user interfaces.
• Write clean, maintainable, and efficient code following best practices and coding standards.
• Collaborate with backend engineers to interface with services built in Python and data stored in PostgreSQL .
• Ensure the technical feasibility of UI/UX designs and optimize applications for maximum speed and scalability.
• Participate in code reviews, testing, and continuous integration processes.
• Translate product requirements and user feedback into elegant, functional interfaces.
• Assist in estimating and planning throughout the software development life cycle.

Experience, Skills, Knowledge Requirements

• Proven experience in building complex front-end applications using React.
• Ability to write and maintain backend services and scripts using Python.
• Knowledge of database design, querying, and optimization, particularly using Postgres
• Strong understanding of HTML, CSS, and JavaScript.
• Exposure to GraphQL, and/or Azure Functions and Azure OpenAI
• Experience using version control systems such as Git.
• Experience with RESTful APIs and integrating front-end components with backend services.
• Excellent problem-solving skills and attention to detail.
• Strong communication and collaboration skills.
• Experience working with other developers, quality engineers (QE), ops engineers and support engineers to ensure smooth deployment and continual operation
• Passion for developing good software
• Experience participating in design discussions with both technical and non-technical audiences.
• Familiarity or experience with Agile engineering practices (test driven development, continuous integration and pair programming, etc.)
• Understanding of web technologies ( Apache, Proxies)
• Experience with continuous integration and deployment (CI/CD)

Senior Front-End Software Engineer (React.js)

We are seeking a remote, full-time Senior Front-End Software Engineer with at least 5 years of software development experience. Candidates must have a strong background in React.js and experience with GraphQL.

In this position, you will play a foundational role in building the core platform that enables power utilities to shift from decades-old legacy systems into an AI-native future. Candidates must bring working proficiency with AI tools and UI scaffolding to ensure an optimal user experience.

This role requires strong coding fundamentals, system design capability, and the mindset of a builder who thrives in a startup environment. You will work in small, agile teams reporting directly to the CTO, collaborating closely with AI and full-stack engineers, security leaders, and product managers. Together, you will build and deliver AI-native services delivered at startup speed.

Our client is building an AI-centric operating system for utilities. It harnesses AI at the enterprise level to better orchestrate customer delight, facilitate power optimization, enhance grid health, and unlock flexibility at scale. Funded by a strategic industry partner and one of the founders of Groupon, the client is poised to transform how utilities operate and how customers experience energy.

Responsibilities

• Front-End Development : Work closely with UI/UX designers to build, implement, and maintain scalable front-end applications, ensuring delivery of unparalleled user experiences
• Architecture : Lead front-end architectural decisions, implementing best practices in performance optimization and responsive design
• Leadership : Provide leadership within the development team, fostering a learning and growth environment
• System Modernization : Transform legacy workflows into modern, secure, scalable codebases using cloud-native best practices
• Security & Compliance : Partner with security leaders to ensure all services adhere to stringent utility-sector regulations, implementing secure coding practices by default
• Agile Delivery : Deliver features and improvements in cycles measured in weeks, balancing speed with reliability

Required Experience

• Excellent English communication skills
• 5+ years of software engineering experience in SaaS or enterprise environments utilizing React.js
• Experience with GraphQL
• Demonstrated ability to deliver high-quality code in fast-moving teams
• Basic proficiency with AI/ML tooling (e.g., calling APIs, integrating model outputs)
• Cloud-native engineering experience (AWS, Azure, GCP)
• Clear communicator, adaptable, eager to learn and grow AI capabilities over time
• Strong sense of ownership and accountability in small teams

Desired Experience

• University degree or relevant industry experience
• Experience with Python, Golang, Node.js, or Java
• Experience working on ERP systems or within the power utilities industry

Additional Information

• Enjoy a fun, fast-growing entrepreneurial company
• Be part of a highly collaborative learning culture, share knowledge, be inclusive, learn, and grow together. Embrace teamwork!
• Knowing your ideas are heard and matter, think big!
• You get to own your job and be recognized for your contributions
• Work with innovative and creative people
• Making mistakes is human. Let's learn from them. Be transparent!
• We recognize you as an individual, with no presumptions or judgment. Be the extraordinary you!
• 15 days Paid Time Off (PTO), one floating day, three sick days, and designated national holidays
• Start: ASAP

About Velozient

We are a privately held, nearshore software development company providing outsourced development resources to North American companies. Our mission is to offer development talent who enjoy taking on challenging work, want to grow their skills and experiences building software, and excel in a fast-paced, dynamic team environment. We are committed to delivering world-class remote resources that enable our valued client team members to work effectively. If this type of opportunity excites you, then consider joining our team!

Senior Front-End Software Engineer (React.js)

We are seeking a remote, full-time Senior Front-End Software Engineer with at least 5 years of software development experience. Candidates must have a strong background in React.js and experience with GraphQL.

In this position, you will play a foundational role in building the core platform that enables power utilities to shift from decades-old legacy systems into an AI-native future. Candidates must bring working proficiency with AI tools and UI scaffolding to ensure an optimal user experience.

This role requires strong coding fundamentals, system design capability, and the mindset of a builder who thrives in a startup environment. You will work in small, agile teams reporting directly to the CTO, collaborating closely with AI and full-stack engineers, security leaders, and product managers. Together, you will build and deliver AI-native services delivered at startup speed.

Our client is building an AI-centric operating system for utilities. It harnesses AI at the enterprise level to better orchestrate customer delight, facilitate power optimization, enhance grid health, and unlock flexibility at scale. Funded by a strategic industry partner and one of the founders of Groupon, the client is poised to transform how utilities operate and how customers experience energy.

Responsibilities

• Front-End Development : Work closely with UI/UX designers to build, implement, and maintain scalable front-end applications, ensuring delivery of unparalleled user experiences
• Architecture : Lead front-end architectural decisions, implementing best practices in performance optimization and responsive design
• Leadership : Provide leadership within the development team, fostering a learning and growth environment
• System Modernization : Transform legacy workflows into modern, secure, scalable codebases using cloud-native best practices
• Security & Compliance : Partner with security leaders to ensure all services adhere to stringent utility-sector regulations, implementing secure coding practices by default
• Agile Delivery : Deliver features and improvements in cycles measured in weeks, balancing speed with reliability

Required Experience

• Excellent English communication skills
• 5+ years of software engineering experience in SaaS or enterprise environments utilizing React.js
• Experience with GraphQL
• Demonstrated ability to deliver high-quality code in fast-moving teams
• Basic proficiency with AI/ML tooling (e.g., calling APIs, integrating model outputs)
• Cloud-native engineering experience (AWS, Azure, GCP)
• Clear communicator, adaptable, eager to learn and grow AI capabilities over time
• Strong sense of ownership and accountability in small teams

Desired Experience

• University degree or relevant industry experience
• Experience with Python, Golang, Node.js, or Java
• Experience working on ERP systems or within the power utilities industry

Additional Information

• Enjoy a fun, fast-growing entrepreneurial company
• Be part of a highly collaborative learning culture, share knowledge, be inclusive, learn, and grow together. Embrace teamwork!
• Knowing your ideas are heard and matter, think big!
• You get to own your job and be recognized for your contributions
• Work with innovative and creative people
• Making mistakes is human. Let's learn from them. Be transparent!
• We recognize you as an individual, with no presumptions or judgment. Be the extraordinary you!
• 15 days Paid Time Off (PTO), one floating day, three sick days, and designated national holidays
• Start: ASAP

About Velozient

We are a privately held, nearshore software development company providing outsourced development resources to North American companies. Our mission is to offer development talent who enjoy taking on challenging work, want to grow their skills and experiences building software, and excel in a fast-paced, dynamic team environment. We are committed to delivering world-class remote resources that enable our valued client team members to work effectively. If this type of opportunity excites you, then consider joining our team!

Senior Front-End Software Engineer (React.js)

We are seeking a remote, full-time Senior Front-End Software Engineer with at least 5 years of software development experience. Candidates must have a strong background in React.js and experience with GraphQL.

In this position, you will play a foundational role in building the core platform that enables power utilities to shift from decades-old legacy systems into an AI-native future. Candidates must bring working proficiency with AI tools and UI scaffolding to ensure an optimal user experience.

This role requires strong coding fundamentals, system design capability, and the mindset of a builder who thrives in a startup environment. You will work in small, agile teams reporting directly to the CTO, collaborating closely with AI and full-stack engineers, security leaders, and product managers. Together, you will build and deliver AI-native services delivered at startup speed.

Our client is building an AI-centric operating system for utilities. It harnesses AI at the enterprise level to better orchestrate customer delight, facilitate power optimization, enhance grid health, and unlock flexibility at scale. Funded by a strategic industry partner and one of the founders of Groupon, the client is poised to transform how utilities operate and how customers experience energy.

Responsibilities

• Front-End Development: Work closely with UI/UX designers to build, implement, and maintain scalable front-end applications, ensuring delivery of unparalleled user experiences
• Architecture: Lead front-end architectural decisions, implementing best practices in performance optimization and responsive design
• Leadership: Provide leadership within the development team, fostering a learning and growth environment
• System Modernization: Transform legacy workflows into modern, secure, scalable codebases using cloud-native best practices
• Security & Compliance: Partner with security leaders to ensure all services adhere to stringent utility-sector regulations, implementing secure coding practices by default
• Agile Delivery: Deliver features and improvements in cycles measured in weeks, balancing speed with reliability

Required Experience

• Excellent English communication skills
• 5+ years of software engineering experience in SaaS or enterprise environments utilizing React.js
• Experience with GraphQL
• Demonstrated ability to deliver high-quality code in fast-moving teams
• Basic proficiency with AI/ML tooling (e.g., calling APIs, integrating model outputs)
• Cloud-native engineering experience (AWS, Azure, GCP)
• Clear communicator, adaptable, eager to learn and grow AI capabilities over time
• Strong sense of ownership and accountability in small teams

Desired Experience

• University degree or relevant industry experience
• Experience with Python, Golang, Node.js, or Java
• Experience working on ERP systems or within the power utilities industry

Additional Information

• Enjoy a fun, fast-growing entrepreneurial company
• Be part of a highly collaborative learning culture, share knowledge, be inclusive, learn, and grow together. Embrace teamwork!
• Knowing your ideas are heard and matter, think big!
• You get to own your job and be recognized for your contributions
• Work with innovative and creative people
• Making mistakes is human. Let's learn from them. Be transparent!
• We recognize you as an individual, with no presumptions or judgment. Be the extraordinary you!
• 15 days Paid Time Off (PTO), one floating day, three sick days, and designated national holidays
• Start: ASAP

About Velozient

We are a privately held, nearshore software development company providing outsourced development resources to North American companies. Our mission is to offer development talent who enjoy taking on challenging work, want to grow their skills and experiences building software, and excel in a fast-paced, dynamic team environment. We are committed to delivering world-class remote resources that enable our valued client team members to work effectively. If this type of opportunity excites you, then consider joining our team!

About Kore Geosystems

Kore Geosystems is at the forefront of technology, leveraging AI and advanced software to deliver innovative solutions for the mining industry. Our products empower geologists and engineers to capture, manage, and analyze geological data faster and more accurately. With leadership experience from companies like Microsoft, our team combines deep technical expertise with a vision to transform how data powers mining operations.

The Opportunity

We’re seeking a hands-on Web Front-End Architect to lead Kore’s efforts in modern web application development. You’ll define and implement the front-end architecture for our next-generation platforms using ReactJS, TypeScript, Hooks, and Context API —while coding day-to-day.

This role requires deep technical ownership, architectural thinking, and the ability to work across multiple complex applications that integrate data visualization, analytics, and AI features.

Key Responsibilities

• Lead and own the front-end architecture and design of scalable, high-performance web applications.
• Develop and maintain applications using ReactJS, TypeScript, Hooks, Context API , and Redux/Flux patterns.
• Design responsive, modular, and reusable UI components using frameworks like Material UI , Bootstrap , or Tailwind .
• Work closely with backend and DevOps teams to ensure seamless CI/CD integration (preferably on Azure DevOps ).
• Implement secure front-end integrations with Azure AD B2C or equivalent identity systems.
• Use SVG and D3.js for advanced data visualizations (annotations, charting, and reporting).
• Collaborate with product, design, and data teams to translate complex requirements into intuitive, performant UI solutions.
• Ensure accessibility, cross-browser compatibility, and responsive design standards.
• Drive front-end code quality, best practices, and technical mentorship within the team.

Required Skills & Experience

• 15+ years of professional experience in front-end or full-stack web development.
• Expert-level proficiency in:
• ReactJS , TypeScript , Context API , Hooks , and Redux/Flux patterns
• HTML5, CSS3, and modern JavaScript (ES6+)
• Solid understanding of Node.js concepts and front-end build pipelines.
• Strong experience with responsive design frameworks (React Material, Bootstrap, Tailwind).
• Hands-on experience with SVG and D3.js for visualizations.
• Experience with CI/CD pipelines (Azure DevOps preferred).
• Familiarity with security best practices , OAuth2 , and Azure B2C authentication.
• Strong debugging, optimization, and performance tuning skills.
• 100% hands-on coding; ability to set architectural standards and lead by example.

Preferred Technologies

• React Material Design
• SVG / D3.js for data-driven UI
• Azure DevOps CI/CD pipelines
• Azure B2C for authentication and user management
• React Router , Functional Components , and React Hooks

Who You Are

• A technical leader who enjoys hands-on coding and architectural problem-solving.
• Passionate about creating elegant, maintainable, and scalable UI systems.
• Curious about data visualization, real-time apps, and next-gen UI technologies.
• Comfortable collaborating with cross-functional, global teams.

Benefits

• Health insurance for employee and family.
• Two weeks of vacation + one week of sick leave annually.
• Work-from-anywhere flexibility (Brazil only).
• Annual performance bonus and salary revision.

Equal Opportunity

Kore Geosystems is an equal opportunity employer. We celebrate diversity and are committed to creating an inclusive environment for all employees.

About Kore Geosystems

Kore Geosystems is at the forefront of technology, leveraging AI and advanced software to deliver innovative solutions for the mining industry. Our products empower geologists and engineers to capture, manage, and analyze geological data faster and more accurately. With leadership experience from companies like Microsoft, our team combines deep technical expertise with a vision to transform how data powers mining operations.

The Opportunity

We’re seeking a hands-on Web Front-End Architect to lead Kore’s efforts in modern web application development. You’ll define and implement the front-end architecture for our next-generation platforms using ReactJS, TypeScript, Hooks, and Context API —while coding day-to-day.

This role requires deep technical ownership, architectural thinking, and the ability to work across multiple complex applications that integrate data visualization, analytics, and AI features.

Key Responsibilities

• Lead and own the front-end architecture and design of scalable, high-performance web applications.
• Develop and maintain applications using ReactJS, TypeScript, Hooks, Context API , and Redux/Flux patterns.
• Design responsive, modular, and reusable UI components using frameworks like Material UI , Bootstrap , or Tailwind .
• Work closely with backend and DevOps teams to ensure seamless CI/CD integration (preferably on Azure DevOps ).
• Implement secure front-end integrations with Azure AD B2C or equivalent identity systems.
• Use SVG and D3.js for advanced data visualizations (annotations, charting, and reporting).
• Collaborate with product, design, and data teams to translate complex requirements into intuitive, performant UI solutions.
• Ensure accessibility, cross-browser compatibility, and responsive design standards.
• Drive front-end code quality, best practices, and technical mentorship within the team.

Required Skills & Experience

• 15+ years of professional experience in front-end or full-stack web development.
• Expert-level proficiency in:
• ReactJS , TypeScript , Context API , Hooks , and Redux/Flux patterns
• HTML5, CSS3, and modern JavaScript (ES6+)
• Solid understanding of Node.js concepts and front-end build pipelines.
• Strong experience with responsive design frameworks (React Material, Bootstrap, Tailwind).
• Hands-on experience with SVG and D3.js for visualizations.
• Experience with CI/CD pipelines (Azure DevOps preferred).
• Familiarity with security best practices , OAuth2 , and Azure B2C authentication.
• Strong debugging, optimization, and performance tuning skills.
• 100% hands-on coding; ability to set architectural standards and lead by example.

Preferred Technologies

• React Material Design
• SVG / D3.js for data-driven UI
• Azure DevOps CI/CD pipelines
• Azure B2C for authentication and user management
• React Router , Functional Components , and React Hooks

Who You Are

• A technical leader who enjoys hands-on coding and architectural problem-solving.
• Passionate about creating elegant, maintainable, and scalable UI systems.
• Curious about data visualization, real-time apps, and next-gen UI technologies.
• Comfortable collaborating with cross-functional, global teams.

Benefits

• Health insurance for employee and family.
• Two weeks of vacation + one week of sick leave annually.
• Work-from-anywhere flexibility (Brazil only).
• Annual performance bonus and salary revision.

Equal Opportunity

Kore Geosystems is an equal opportunity employer. We celebrate diversity and are committed to creating an inclusive environment for all employees.