React UI Senior Software Development Engineer

📍 Job Overview

Job Title: React UI Senior Software Development Engineer

Company: Jobgether (on behalf of a partner company)

Location: Brazil

Job Type: Full-time

Category: Software Engineering (Frontend/UI)

Date Posted: May 21, 2026

Experience Level: Senior (5-10 years)

Remote Status: Fully Remote within Brazil

🚀 Role Summary

• Design, develop, and enhance modern, scalable, and high-performance React-based user interfaces for large-scale cloud-based digital platforms.

• Collaborate closely with distributed global engineering teams, product managers, and QA to deliver new features and improve UI architecture.

• Build reusable, high-performance UI components and ensure code quality through robust test automation strategies (unit, integration, E2E).

• Participate actively in Agile ceremonies, contributing to continuous delivery pipelines and driving efficiency through process automation.

• Troubleshoot and resolve complex technical issues within a fast-paced, innovation-driven R&D environment.

📝 Enhancement Note: This role is for a Senior Software Development Engineer specializing in React UI, focusing on building enterprise-level cloud platforms. The emphasis is on modern frontend architecture, test automation, and collaboration within a distributed, Agile R&D setting. While the posting is by Jobgether, the role is with a partner company, indicating a need to understand the partner's specific tech stack and culture during the application process.

📈 Primary Responsibilities

• Develop and maintain complex, scalable, and performant user interfaces using React.js, JavaScript (ES6+), HTML5, and CSS3.

• Architect and implement reusable UI components, ensuring adherence to best practices in frontend development and design systems.

• Collaborate with backend engineers to define and integrate APIs, ensuring seamless data flow and functionality.

• Design and implement comprehensive test automation suites, including unit, integration, and end-to-end tests, to ensure code quality and stability.

• Identify opportunities to automate manual testing processes and improve overall product quality and release efficiency.

• Actively participate in Agile/Scrum ceremonies, including sprint planning, daily stand-ups, sprint reviews, and retrospectives.

• Contribute to the continuous improvement of the CI/CD pipeline for frontend applications.

• Conduct code reviews, provide constructive feedback, and mentor junior engineers on best practices.

• Troubleshoot and debug complex issues across the frontend stack, working collaboratively with cross-functional teams.

• Stay updated with emerging frontend technologies and industry trends to drive innovation and enhance platform capabilities.

📝 Enhancement Note: The responsibilities highlight a senior-level contribution, emphasizing not just development but also architecture, automation, and mentorship. The focus on "large-scale cloud platforms" and "enterprise solutions" suggests a need for experience with robust, scalable applications rather than simple web pages.

🎓 Skills & Qualifications

Education: Bachelor’s degree in Computer Science, Computer Engineering, or a closely related technical field.

Experience:

• A minimum of 5 years of professional experience in JavaScript (ES6+), HTML, and CSS, with a strong understanding of cross-browser compatibility.

• At least 3 years of hands-on experience developing complex user interfaces with modern frontend frameworks, with a primary focus on React.js.

Required Skills:

• Expertise in React.js and its core principles, including hooks, context API, and component lifecycle.

• Strong proficiency in JavaScript (ES6+), HTML5, and CSS3, including preprocessors like Sass or Less.

• In-depth knowledge of UI architecture patterns, state management solutions (e.g., Redux, Zustand), and performance optimization techniques.

• Experience with frontend build tools such as Webpack, Babel, NPM, or Yarn.

• Solid experience in test automation frameworks for unit, integration, and end-to-end testing (e.g., Jest, React Testing Library, Cypress, TestCafe).

• Familiarity with Agile methodologies, including Scrum or Kanban, and experience in distributed team environments.

Preferred Skills:

• Exposure to Behavior-Driven Development (BDD) or Acceptance Test-Driven Development (ATDD) practices.

• Experience with other modern frontend frameworks (Angular, Vue.js) for broader context.

• Familiarity with cloud platforms (AWS, Azure, GCP) and their frontend deployment strategies.

• Knowledge of CI/CD principles and tools for automated builds, testing, and deployments.

• Experience with TypeScript for enhanced code quality and maintainability.

• Familiarity with GraphQL or RESTful API design and integration.

📝 Enhancement Note: The requirements clearly indicate a senior-level React developer. The emphasis on "3+ years of hands-on experience with modern frontend frameworks such as React, Angular, Vue.js, or similar" suggests that while React is primary, broader framework exposure is a plus. The specific mention of build tools and test automation frameworks points to a need for practical, hands-on experience.

📊 Process & Systems Portfolio Requirements

Portfolio Essentials:

• Demonstrations of complex, scalable React applications, showcasing robust UI architecture and component design.

• Examples of reusable component libraries or design systems built for enterprise-level projects.

• Case studies detailing the implementation of automated testing strategies (unit, integration, E2E) and their impact on code quality and release cycles.

• Projects that highlight experience with modern build tools (Webpack, NPM, Yarn) and their configuration for optimized frontend development.

Process Documentation:

• Examples of how you have documented frontend architecture decisions, component usage guidelines, and development workflows.

• Showcases of process optimization initiatives, such as improving build times, enhancing testing efficiency, or streamlining development workflows.

• Documentation illustrating your approach to code reviews, collaborative problem-solving, and knowledge sharing within a development team.

📝 Enhancement Note: For a senior role, a portfolio is crucial. It should go beyond showcasing finished products to demonstrating how the candidate builds, tests, and optimizes frontend systems. The focus on process documentation is key for a senior engineer who is expected to contribute to team standards and best practices.

💵 Compensation & Benefits

Salary Range:

The salary for a Senior Software Development Engineer in Brazil can vary significantly based on experience, specific location within Brazil, and the hiring company's compensation structure. Based on industry benchmarks for senior-level frontend developers in Brazil with 5+ years of experience, a competitive annual salary range is estimated to be between R$ 120,000 to R$ 200,000 BRL. This estimate considers the cost of living in major Brazilian tech hubs and the demand for skilled React developers.

Benefits:

• CLT employment model (Consolidação das Leis do Trabalho), providing legal employment rights and protections.

• Comprehensive Health and Dental Coverage.

• Meal and/or Food Vouchers to assist with daily expenses.

• Childcare Assistance Benefits to support working parents.

• Gympass Access, offering a wide range of fitness and wellness options.

• Language Support Programs to aid in professional development.

• Access to Digital Learning and Course Platforms for continuous skill enhancement.

• Birthday Day Off, allowing for personal celebration.

• Volunteer Time Off (2 days per year) to support community engagement.

Working Hours:

The standard working hours are typically 40 hours per week, aligning with the CLT employment model. Given the remote nature and global team collaboration, some flexibility may be expected, but core working hours will likely be established to facilitate team synchronization.

📝 Enhancement Note: Salary estimation is based on aggregated data from Brazilian job boards and salary aggregators for senior software engineers, adjusted for the specified experience level and the remote nature of the role within Brazil. The benefits are directly extracted from the job description, highlighting the comprehensive package offered.

🎯 Team & Company Context

🏢 Company Culture

Industry: The partner company operates within the technology sector, likely focusing on developing and providing cloud-based digital platforms and enterprise solutions. This implies a fast-paced, innovation-centric environment where technology plays a pivotal role in business operations and customer engagement.

Company Size: While specific details about the partner company's size are not provided, Jobgether's platform often works with a range of companies, from startups to established enterprises. The mention of "global R&D environment" and "distributed engineering teams across multiple regions" suggests a company of moderate to large size, with a significant international presence.

Founded: The founding date of the partner company is not specified. However, the focus on "modern, scalable, and high-performance web user interfaces" and "cloud-based digital platforms" indicates a company that is either relatively new and built on modern tech stacks or an established entity that has undergone significant digital transformation.

Team Structure:

• The operations team is likely structured to support a global R&D effort, comprising specialized frontend engineers focused on UI development, backend engineers, QA professionals, and product managers.

• Reporting structures will probably follow a hierarchical model within engineering departments, with Senior Engineers often leading technical initiatives or mentoring smaller groups.

Methodology:

• Data analysis and insights are critical for understanding user behavior and platform performance, informing UI/UX improvements and feature development.

• Workflow planning and optimization strategies are employed through Agile methodologies to ensure efficient project execution and continuous delivery.

• Automation and efficiency practices are paramount, particularly in test automation and CI/CD processes, to maintain high standards of quality and speed.

Company Website: [Jobgether.com - for application process, partner company website not specified]

📝 Enhancement Note: Inferences about the company culture are based on the job description's emphasis on R&D, global collaboration, modern technologies, and Agile practices. The partner company is likely a tech-forward organization focused on innovation and scalable solutions.

📈 Career & Growth Analysis

Operations Career Level: This is a Senior Software Development Engineer role, demanding a high level of technical expertise, autonomy, and the ability to influence technical direction. Senior engineers are expected to not only deliver complex features but also contribute to architectural decisions, mentor junior team members, and drive best practices within the team.

Reporting Structure: The Senior Engineer will likely report to an Engineering Manager or a Lead Engineer. They will work closely with Product Managers and collaborate extensively with fellow engineers across different disciplines (frontend, backend, QA) and potentially with designers.

Operations Impact: The role's impact is directly tied to the user experience and functionality of large-scale cloud platforms. By building efficient, scalable, and user-friendly interfaces, this role directly influences customer satisfaction, product adoption, and ultimately, the success of the digital solutions offered by the partner company. The focus on performance and scalability also contributes to operational efficiency and cost-effectiveness of the platforms.

Growth Opportunities:

• Technical Specialization: Deepen expertise in advanced React patterns, state management, performance optimization, and potentially related frontend technologies (e.g., WebAssembly, GraphQL).

• Architectural Leadership: Progress into roles like Staff or Principal Engineer, focusing on complex system design, technical strategy, and cross-team technical alignment.

• Mentorship & Team Lead: Take on more formal leadership responsibilities, such as leading a specific feature team, mentoring junior engineers, and guiding technical best practices.

• Cross-Functional Exposure: Gain broader understanding of backend systems, cloud infrastructure, and product management to foster better cross-functional collaboration and potential transition into related roles.

📝 Enhancement Note: The growth opportunities are framed around typical career progression paths for senior software engineers in technology companies, emphasizing both technical depth and leadership potential.

🌐 Work Environment

Office Type: This position offers a fully remote work arrangement within Brazil. This means there is no physical office requirement for this role, allowing the engineer to work from their chosen location in Brazil.

Office Location(s): While the role is remote, the company operates globally, with distributed engineering teams across multiple regions. The engineer will be based in Brazil, likely aligning with Brazilian time zones for core collaboration.

Workspace Context:

• The workspace is virtual, demanding strong self-discipline and effective communication tools for remote collaboration.

• Access to modern development tools, cloud environments, and collaborative platforms (e.g., Slack, Jira, Confluence) will be provided to facilitate seamless remote work.

• Opportunities for interaction will be through virtual meetings, code reviews, asynchronous communication channels, and potentially virtual team-building activities.

Work Schedule: The typical work schedule will be 40 hours per week. While remote, adherence to core working hours will be important for synchronous collaboration with global teams. Flexibility is implied within the remote setup, but consistent availability during key team syncs will be expected.

📝 Enhancement Note: The remote nature of the role is a key aspect of the work environment, emphasizing the need for strong communication and self-management skills.

📄 Application & Portfolio Review Process

Interview Process:

• Initial Screening: A review of your application and resume by Jobgether's AI-powered system, followed by a human review to assess core qualifications against the role's requirements.

• Technical Assessment/Coding Challenge: Typically involves a live coding session or a take-home project to evaluate your React development skills, problem-solving abilities, and approach to writing clean, testable code.

• Technical Interview(s): Deep dives into your experience with React, JavaScript, UI architecture, test automation, and problem-solving scenarios. Expect questions on how you've handled complex UI challenges, optimized performance, and implemented testing strategies.

• Behavioral/Culture Fit Interview: Assesses your collaboration style, communication skills, ability to work in a distributed team, and alignment with the company's values and Agile methodologies.

• Final Interview: May involve a discussion with a hiring manager or senior leadership to finalize the decision.

Portfolio Review Tips:

• Highlight React Expertise: Showcase your strongest React projects, clearly indicating your role and contributions. Focus on complexity, scalability, and user experience.

• Demonstrate Architectural Thinking: Explain your approach to UI architecture, component design, state management, and how you ensure maintainability and scalability.

• Showcase Testing Proficiency: Include examples or explanations of your test automation strategies (unit, integration, E2E). Detail how you've improved code quality and reliability through testing.

• Quantify Impact: Whenever possible, use metrics to demonstrate the impact of your work (e.g., performance improvements, reduction in bugs, efficiency gains from automation).

• Clean Code and Documentation: Ensure any code samples are well-organized, readable, and follow best practices. If providing links to live projects, ensure they are well-maintained.

Challenge Preparation:

• Practice React Problems: Revisit common React challenges, data structures, and algorithms relevant to frontend development.

• Understand Testing Frameworks: Be ready to discuss your experience with specific testing tools (Jest, React Testing Library, Cypress) and demonstrate how you would test different UI components or scenarios.

• Articulate Your Process: Prepare to explain your development workflow, from understanding requirements to deploying code, including your approach to debugging and problem-solving.

• Study Agile Principles: Be ready to discuss your experience with Scrum or Kanban and how you contribute to team collaboration and continuous improvement.

📝 Enhancement Note: The interview process and portfolio review tips are tailored for a senior-level frontend engineering role, emphasizing technical depth, practical application, and collaborative skills.

🛠 Tools & Technology Stack

Primary Tools:

• Frontend Framework: React.js (primary focus)

• Languages: JavaScript (ES6+), HTML5, CSS3

• State Management: Redux, Zustand, or similar

• Build Tools: Webpack, Babel, NPM, Yarn

• Version Control: Git (e.g., GitHub, GitLab, Bitbucket)

Analytics & Reporting:

• Experience with browser developer tools for debugging and performance analysis.

CRM & Automation:

• While not directly a CRM role, understanding how frontend applications integrate with backend systems and APIs is crucial.

• Experience with CI/CD tools and practices for automated builds, testing, and deployments (e.g., Jenkins, GitLab CI, GitHub Actions).

📝 Enhancement Note: The specified tools are directly derived from the "Requirements" section, with additional relevant technologies commonly used in modern frontend development and DevOps practices for context.

👥 Team Culture & Values

Operations Values:

• Quality & Excellence: A strong commitment to delivering high-quality, robust, and performant code through rigorous development and testing practices.

• Collaboration & Teamwork: A culture that values open communication, knowledge sharing, and mutual support within distributed global teams.

• Innovation & Continuous Improvement: Encouraging proactive problem-solving, the exploration of new technologies, and the constant refinement of processes and products.

• User-Centricity: A focus on building user interfaces that are intuitive, accessible, and provide an exceptional user experience.

• Efficiency & Automation: A drive to automate repetitive tasks, optimize workflows, and leverage technology to enhance productivity and reduce manual effort.

Collaboration Style:

• Agile and Iterative: Working within Agile frameworks (Scrum/Kanban) that emphasize iterative development, frequent feedback loops, and adaptability.

• Cross-Functional Integration: Close collaboration with product management, design, backend engineering, and QA teams to ensure alignment and successful product delivery.

• Asynchronous Communication: Proficiency in using asynchronous communication tools (e.g., Slack, email) effectively for a distributed team, complemented by synchronous meetings for critical discussions.

• Code Review Culture: A strong emphasis on peer code reviews as a mechanism for knowledge sharing, quality assurance, and professional development.

📝 Enhancement Note: These values and collaboration styles are inferred from the job description's emphasis on Agile, global teams, continuous delivery, and quality through automation.

⚡ Challenges & Growth Opportunities

Challenges:

• Complex UI Development: Building and maintaining sophisticated user interfaces for large-scale enterprise platforms can present significant technical challenges related to performance, scalability, and maintainability.

• Distributed Team Collaboration: Effectively communicating and collaborating with team members across different time zones and cultures requires strong interpersonal and organizational skills.

• Keeping Pace with Technology: The fast-evolving landscape of frontend technologies requires continuous learning and adaptation to stay current with best practices and new tools.

• Balancing Innovation and Stability: Introducing new features and technologies while ensuring the stability and reliability of existing systems requires careful planning and execution.

Learning & Development Opportunities:

• Advanced React Training: Access to online learning platforms and potentially company-sponsored courses to deepen expertise in React and its ecosystem.

• Exposure to Enterprise-Scale Architecture: Gaining hands-on experience with the architectural patterns and challenges of building and deploying software for large enterprises.

• Mentorship from Senior Engineers: Opportunities to learn from experienced technical leaders and architects within the organization.

• Cross-Disciplinary Learning: Potential to gain insights into backend development, cloud infrastructure, and product strategy through cross-functional collaboration.

📝 Enhancement Note: Challenges and growth opportunities are framed around the specific demands of a senior frontend role in a modern, potentially global, tech environment.

💡 Interview Preparation

Strategy Questions:

• "Describe a complex UI feature you developed using React. What were the main challenges, and how did you overcome them? What architectural decisions did you make, and why?" (Focus on detail, problem-solving, and decision-making).

• "How do you approach test automation for a large-scale React application? Discuss your experience with unit, integration, and E2E testing, and the tools you prefer." (Highlight your testing strategy and practical experience).

Company & Culture Questions:

• "How do you ensure effective communication and collaboration within a distributed, global team?" (Prepare examples of how you've managed remote communication challenges).

• "What are your thoughts on Agile methodologies, and how do you contribute to a culture of continuous improvement?" (Showcase your understanding and active participation in Agile processes).

Portfolio Presentation Strategy:

• Structure Your Narrative: For each project, explain the problem, your solution, the technologies used, your specific contributions, and the outcomes/impact.

• Focus on Technical Depth: Be prepared to discuss the architectural choices, trade-offs made, and the rationale behind them.

• Showcase Automation: Clearly articulate your role in implementing or improving test automation and CI/CD processes, highlighting the benefits achieved.

• Quantify Achievements: Use numbers and data to illustrate the success of your projects (e.g., performance metrics, user engagement improvements, bug reduction).

• Practice Your Pitch: Rehearse your presentation to ensure it's concise, engaging, and covers all key aspects within the allotted time.

📝 Enhancement Note: Interview preparation advice focuses on demonstrating senior-level technical capabilities, problem-solving skills, and collaborative attributes relevant to the role and company context.

📌 Application Steps

To apply for this operations position:

• Submit your application through the Jobgether platform.

• Tailor Your Resume: Highlight your 5+ years of JavaScript/HTML/CSS experience and 3+ years specifically with React. Emphasize your experience with UI architecture, component-based design, and test automation tools (unit, integration, E2E). Quantify achievements where possible.

• Prepare Your Portfolio: Curate your strongest React projects. Ensure they showcase complex UI development, scalable architecture, and any contributions to automation or performance optimization. Be ready to discuss your process and impact for each project.

• Research the Partner Company (if possible): While Jobgether is the application portal, try to gain insights into the partner company's industry, products, and potential tech stack to tailor your responses.

• Practice Technical & Behavioral Questions: Rehearse answers to common senior React interview questions, focusing on your problem-solving approach, technical decision-making, and experience in distributed/Agile environments.

⚠️ Important Notice: This enhanced job description includes AI-generated insights and operations industry-standard assumptions. All details should be verified directly with the hiring organization before making application decisions.